File	Doc	Category	Size	Date	Package
Activity.java	API Doc	Android 1.5 API	147203	Wed May 06 22:41:54 BST 2009	android.app

Activity

• java.lang.Object
  • android.view.ContextThemeWrapper

public class Activity extends ApplicationContext {
protected void onCreate(Bundle savedInstanceState);

protected void onStart();

protected void onRestart();

protected void onResume();

protected void onPause();

protected void onStop();

protected void onDestroy();
}

public class MyActivity extends Activity {
...

static final int PICK_CONTACT_REQUEST = 0;

protected boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
// When the user center presses, let them pick a contact.
startActivityForResult(
new Intent(Intent.ACTION_PICK,
new Uri("content://contacts")),
PICK_CONTACT_REQUEST);
return true;
}
return false;
}

protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
if (requestCode == PICK_CONTACT_REQUEST) {
if (resultCode == RESULT_OK) {
// A contact was picked. Here we will just display it
// to the user.
startActivity(new Intent(Intent.ACTION_VIEW, data));
}
}
}
}

public class CalendarActivity extends Activity {
...

static final int DAY_VIEW_MODE = 0;
static final int WEEK_VIEW_MODE = 1;

private SharedPreferences mPrefs;
private int mCurViewMode;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

SharedPreferences mPrefs = getSharedPreferences();
mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE);
}

protected void onPause() {
super.onPause();

SharedPreferences.Editor ed = mPrefs.edit();
ed.putInt("view_mode", mCurViewMode);
ed.commit();
}
}

Fields Summary
private static final String	TAG
public static final int	RESULT_CANCELED Standard activity result: operation canceled.
public static final int	RESULT_OK Standard activity result: operation succeeded.
public static final int	RESULT_FIRST_USER Start of user-defined activity results.
private static long	sInstanceCount
private static final String	WINDOW_HIERARCHY_TAG
private static final String	SAVED_DIALOG_IDS_KEY
private static final String	SAVED_DIALOGS_TAG
private static final String	SAVED_DIALOG_KEY_PREFIX
private static final String	SAVED_SEARCH_DIALOG_KEY
private android.util.SparseArray	mManagedDialogs
private Instrumentation	mInstrumentation
private android.os.IBinder	mToken
String	mEmbeddedID
private Application	mApplication
private android.content.Intent	mIntent
private android.content.ComponentName	mComponent
android.content.pm.ActivityInfo	mActivityInfo
ActivityThread	mMainThread
Object	mLastNonConfigurationInstance
HashMap	mLastNonConfigurationChildInstances
Activity	mParent
boolean	mCalled
private boolean	mResumed
private boolean	mStopped
boolean	mFinished
boolean	mStartedActivity
int	mConfigChangeFlags
android.content.res.Configuration	mCurrentConfig
private android.view.Window	mWindow
private android.view.WindowManager	mWindowManager
android.view.View	mDecor
boolean	mWindowAdded
boolean	mVisibleFromServer
boolean	mVisibleFromClient
private CharSequence	mTitle
private int	mTitleColor
private final ArrayList	mManagedCursors
int	mResultCode
android.content.Intent	mResultData
private boolean	mTitleReady
private int	mDefaultKeyMode
private android.text.SpannableStringBuilder	mDefaultKeySsb
protected static final int[]	FOCUSED_STATE_SET
private Thread	mUiThread
private final android.os.Handler	mHandler
public static final int	DEFAULT_KEYS_DISABLE Use with {@link #setDefaultKeyMode} to turn off default handling of keys.
public static final int	DEFAULT_KEYS_DIALER Use with {@link #setDefaultKeyMode} to launch the dialer during default key handling.
public static final int	DEFAULT_KEYS_SHORTCUT Use with {@link #setDefaultKeyMode} to execute a menu shortcut in default key handling. That is, the user does not need to hold down the menu key to execute menu shortcuts.
public static final int	DEFAULT_KEYS_SEARCH_LOCAL Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes will start an application-defined search. (If the application or activity does not actually define a search, the the keys will be ignored.) See {@link android.app.SearchManager android.app.SearchManager} for more details.
public static final int	DEFAULT_KEYS_SEARCH_GLOBAL Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes will start a global search (typically web search, but some platforms may define alternate methods for global search) See {@link android.app.SearchManager android.app.SearchManager} for more details.

Constructors Summary
public Activity() ++sInstanceCount;

Methods Summary
public void	addContentView(android.view.View view, ViewGroup.LayoutParams params) Add an additional content view to the activity. Added after any existing ones in the activity -- existing views are NOT removed. param view The desired content to display. param params Layout parameters for the view. getWindow().addContentView(view, params);
final void	attach(android.content.Context context, ActivityThread aThread, Instrumentation instr, android.os.IBinder token, Application application, android.content.Intent intent, android.content.pm.ActivityInfo info, java.lang.CharSequence title, android.app.Activity parent, java.lang.String id, java.lang.Object lastNonConfigurationInstance, android.content.res.Configuration config) attach(context, aThread, instr, token, application, intent, info, title, parent, id, lastNonConfigurationInstance, null, config);
final void	attach(android.content.Context context, ActivityThread aThread, Instrumentation instr, android.os.IBinder token, Application application, android.content.Intent intent, android.content.pm.ActivityInfo info, java.lang.CharSequence title, android.app.Activity parent, java.lang.String id, java.lang.Object lastNonConfigurationInstance, java.util.HashMap lastNonConfigurationChildInstances, android.content.res.Configuration config) attachBaseContext(context); mWindow = PolicyManager.makeNewWindow(this); mWindow.setCallback(this); if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { mWindow.setSoftInputMode(info.softInputMode); } mUiThread = Thread.currentThread(); mMainThread = aThread; mInstrumentation = instr; mToken = token; mApplication = application; mIntent = intent; mComponent = intent.getComponent(); mActivityInfo = info; mTitle = title; mParent = parent; mEmbeddedID = id; mLastNonConfigurationInstance = lastNonConfigurationInstance; mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); if (mParent != null) { mWindow.setContainer(mParent.getWindow()); } mWindowManager = mWindow.getWindowManager(); mCurrentConfig = config;
public void	closeContextMenu() Programmatically closes the most recently opened context menu, if showing. mWindow.closePanel(Window.FEATURE_CONTEXT_MENU);
public void	closeOptionsMenu() Progammatically closes the options menu. If the options menu is already closed, this method does nothing. mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL);
public PendingIntent	createPendingResult(int requestCode, android.content.Intent data, int flags) Create a new PendingIntent object which you can hand to others for them to use to send result data back to your {@link #onActivityResult} callback. The created object will be either one-shot (becoming invalid after a result is sent back) or multiple (allowing any number of results to be sent through it). param requestCode Private request code for the sender that will be associated with the result data when it is returned. The sender can not modify this value, allowing you to identify incoming results. param data Default data to supply in the result, which may be modified by the sender. param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, or any of the flags as supported by {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts of the intent that can be supplied when the actual send happens. return Returns an existing or new PendingIntent matching the given parameters. May return null only if {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been supplied. see PendingIntent String packageName = getPackageName(); try { IIntentSender target = ActivityManagerNative.getDefault().getIntentSender( IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, mParent == null ? mToken : mParent.mToken, mEmbeddedID, requestCode, data, null, flags); return target != null ? new PendingIntent(target) : null; } catch (RemoteException e) { // Empty } return null;
public final void	dismissDialog(int id) Dismiss a dialog that was previously shown via {@link #showDialog(int)}. param id The id of the managed dialog. throws IllegalArgumentException if the id was not previously shown via {@link #showDialog(int)}. see #onCreateDialog(int) see #onPrepareDialog(int, Dialog) see #showDialog(int) see #removeDialog(int) if (mManagedDialogs == null) { throw missingDialog(id); } final Dialog dialog = mManagedDialogs.get(id); if (dialog == null) { throw missingDialog(id); } dialog.dismiss();
void	dispatchActivityResult(java.lang.String who, int requestCode, int resultCode, android.content.Intent data) if (Config.LOGV) Log.v( TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode + ", resCode=" + resultCode + ", data=" + data); if (who == null) { onActivityResult(requestCode, resultCode, data); }
public boolean	dispatchKeyEvent(android.view.KeyEvent event) Called to process key events. You can override this to intercept all key events before they are dispatched to the window. Be sure to call this implementation for key events that should be handled normally. param event The key event. return boolean Return true if this event was consumed. onUserInteraction(); if (getWindow().superDispatchKeyEvent(event)) { return true; } return event.dispatch(this);
public boolean	dispatchTouchEvent(android.view.MotionEvent ev) Called to process touch screen events. You can override this to intercept all touch screen events before they are dispatched to the window. Be sure to call this implementation for touch screen events that should be handled normally. param ev The touch screen event. return boolean Return true if this event was consumed. if (ev.getAction() == MotionEvent.ACTION_DOWN) { onUserInteraction(); } if (getWindow().superDispatchTouchEvent(ev)) { return true; } return onTouchEvent(ev);
public boolean	dispatchTrackballEvent(android.view.MotionEvent ev) Called to process trackball events. You can override this to intercept all trackball events before they are dispatched to the window. Be sure to call this implementation for trackball events that should be handled normally. param ev The trackball event. return boolean Return true if this event was consumed. onUserInteraction(); if (getWindow().superDispatchTrackballEvent(ev)) { return true; } return onTrackballEvent(ev);
protected void	finalize() super.finalize(); --sInstanceCount;
public android.view.View	findViewById(int id) Finds a view that was identified by the id attribute from the XML that was processed in {@link #onCreate}. return The view if found or null otherwise. return getWindow().findViewById(id);
public void	finish() Call this when your activity is done and should be closed. The ActivityResult is propagated back to whoever launched you via onActivityResult(). if (mParent == null) { int resultCode; Intent resultData; synchronized (this) { resultCode = mResultCode; resultData = mResultData; } if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); try { if (ActivityManagerNative.getDefault() .finishActivity(mToken, resultCode, resultData)) { mFinished = true; } } catch (RemoteException e) { // Empty } } else { mParent.finishFromChild(this); }
public void	finishActivity(int requestCode) Force finish another activity that you had previously started with {@link #startActivityForResult}. param requestCode The request code of the activity that you had given to startActivityForResult(). If there are multiple activities started with this request code, they will all be finished. if (mParent == null) { try { ActivityManagerNative.getDefault() .finishSubActivity(mToken, mEmbeddedID, requestCode); } catch (RemoteException e) { // Empty } } else { mParent.finishActivityFromChild(this, requestCode); }
public void	finishActivityFromChild(android.app.Activity child, int requestCode) This is called when a child activity of this one calls its finishActivity(). param child The activity making the call. param requestCode Request code that had been used to start the activity. try { ActivityManagerNative.getDefault() .finishSubActivity(mToken, child.mEmbeddedID, requestCode); } catch (RemoteException e) { // Empty }
public void	finishFromChild(android.app.Activity child) This is called when a child activity of this one calls its {@link #finish} method. The default implementation simply calls finish() on this activity (the parent), finishing the entire group. param child The activity making the call. see #finish finish();
final android.os.IBinder	getActivityToken() return mParent != null ? mParent.getActivityToken() : mToken;
public final Application	getApplication() Return the application that owns this activity. return mApplication;
public android.content.ComponentName	getCallingActivity() Return the name of the activity that invoked this activity. This is who the data in {@link #setResult setResult()} will be sent to. You can use this information to validate that the recipient is allowed to receive the data. Note: if the calling activity is not expecting a result (that is it did not use the {@link #startActivityForResult} form that includes a request code), then the calling package will be null. return String The full name of the activity that will receive your reply, or null if none. try { return ActivityManagerNative.getDefault().getCallingActivity(mToken); } catch (RemoteException e) { return null; }
public java.lang.String	getCallingPackage() Return the name of the package that invoked this activity. This is who the data in {@link #setResult setResult()} will be sent to. You can use this information to validate that the recipient is allowed to receive the data. Note: if the calling activity is not expecting a result (that is it did not use the {@link #startActivityForResult} form that includes a request code), then the calling package will be null. return The package of the activity that will receive your reply, or null if none. try { return ActivityManagerNative.getDefault().getCallingPackage(mToken); } catch (RemoteException e) { return null; }
public int	getChangingConfigurations() If this activity is being destroyed because it can not handle a configuration parameter being changed (and thus its {@link #onConfigurationChanged(Configuration)} method is not being called), then you can use this method to discover the set of changes that have occurred while in the process of being destroyed. Note that there is no guarantee that these will be accurate (other changes could have happened at any time), so you should only use this as an optimization hint. return Returns a bit field of the configuration parameters that are changing, as defined by the {@link android.content.res.Configuration} class. return mConfigChangeFlags;
public android.content.ComponentName	getComponentName() Returns complete component name of this activity. return Returns the complete component name for this activity return mComponent;
public android.view.View	getCurrentFocus() Calls {@link android.view.Window#getCurrentFocus} on the Window of this Activity to return the currently focused view. return View The current View with focus or null. see #getWindow see android.view.Window#getCurrentFocus return mWindow != null ? mWindow.getCurrentFocus() : null;
public static long	getInstanceCount() return sInstanceCount;
public android.content.Intent	getIntent() Return the intent that started this activity. return mIntent;
java.util.HashMap	getLastNonConfigurationChildInstances() Retrieve the non-configuration instance data that was previously returned by {@link #onRetainNonConfigurationChildInstances()}. This will be available from the initial {@link #onCreate} and {@link #onStart} calls to the new instance, allowing you to extract any useful dynamic state from the previous instance. Note that the data you retrieve here should only be used as an optimization for handling configuration changes. You should always be able to handle getting a null pointer back, and an activity must still be able to restore itself to its previous state (through the normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this function returns null. return Returns the object previously returned by {@link #onRetainNonConfigurationChildInstances()} return mLastNonConfigurationChildInstances;
public java.lang.Object	getLastNonConfigurationInstance() Retrieve the non-configuration instance data that was previously returned by {@link #onRetainNonConfigurationInstance()}. This will be available from the initial {@link #onCreate} and {@link #onStart} calls to the new instance, allowing you to extract any useful dynamic state from the previous instance. Note that the data you retrieve here should only be used as an optimization for handling configuration changes. You should always be able to handle getting a null pointer back, and an activity must still be able to restore itself to its previous state (through the normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this function returns null. return Returns the object previously returned by {@link #onRetainNonConfigurationInstance()}. return mLastNonConfigurationInstance;
public android.view.LayoutInflater	getLayoutInflater() Convenience for calling {@link android.view.Window#getLayoutInflater}. return getWindow().getLayoutInflater();
public java.lang.String	getLocalClassName() Returns class name for this activity with the package prefix removed. This is the default name used to read and write settings. return The local class name. final String pkg = getPackageName(); final String cls = mComponent.getClassName(); int packageLen = pkg.length(); if (!cls.startsWith(pkg) || cls.length() <= packageLen || cls.charAt(packageLen) != '.") { return cls; } return cls.substring(packageLen+1);
public android.view.MenuInflater	getMenuInflater() Returns a {@link MenuInflater} with this context. return new MenuInflater(this);
public final android.app.Activity	getParent() Return the parent activity if this view is an embedded child. return mParent;
public android.content.SharedPreferences	getPreferences(int mode) Retrieve a {@link SharedPreferences} object for accessing preferences that are private to this activity. This simply calls the underlying {@link #getSharedPreferences(String, int)} method by passing in this activity's class name as the preferences name. param mode Operating mode. Use {@link #MODE_PRIVATE} for the default operation, {@link #MODE_WORLD_READABLE} and {@link #MODE_WORLD_WRITEABLE} to control permissions. return Returns the single SharedPreferences instance that can be used to retrieve and modify the preference values. return getSharedPreferences(getLocalClassName(), mode);
public int	getRequestedOrientation() Return the current requested orientation of the activity. This will either be the orientation requested in its component's manifest, or the last requested orientation given to {@link #setRequestedOrientation(int)}. return Returns an orientation constant as used in {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. if (mParent == null) { try { return ActivityManagerNative.getDefault() .getRequestedOrientation(mToken); } catch (RemoteException e) { // Empty } } else { return mParent.getRequestedOrientation(); } return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
public java.lang.Object	getSystemService(java.lang.String name) if (getBaseContext() == null) { throw new IllegalStateException( "System services not available to Activities before onCreate()"); } if (WINDOW_SERVICE.equals(name)) { return mWindowManager; } return super.getSystemService(name);
public int	getTaskId() Return the identifier of the task this activity is in. This identifier will remain the same for the lifetime of the activity. return Task identifier, an opaque integer. try { return ActivityManagerNative.getDefault() .getTaskForActivity(mToken, false); } catch (RemoteException e) { return -1; }
public final java.lang.CharSequence	getTitle() return mTitle;
public final int	getTitleColor() return mTitleColor;
public final int	getVolumeControlStream() Gets the suggested audio stream whose volume should be changed by the harwdare volume controls. return The suggested audio stream type whose volume should be changed by the hardware volume controls. see #setVolumeControlStream(int) return getWindow().getVolumeControlStream();
public int	getWallpaperDesiredMinimumHeight() int height = super.getWallpaperDesiredMinimumHeight(); return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height;
public int	getWallpaperDesiredMinimumWidth() int width = super.getWallpaperDesiredMinimumWidth(); return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width;
public android.view.Window	getWindow() Retrieve the current {@link android.view.Window} for the activity. This can be used to directly access parts of the Window API that are not available through Activity/Screen. return Window The current window, or null if the activity is not visual. return mWindow;
public android.view.WindowManager	getWindowManager() Retrieve the window manager for showing custom windows. return mWindowManager;
public boolean	hasWindowFocus() Returns true if this activity's main window currently has window focus. Note that this is not the same as the view itself having focus. return True if this activity's main window currently has window focus. see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) Window w = getWindow(); if (w != null) { View d = w.getDecorView(); if (d != null) { return d.hasWindowFocus(); } } return false;
public final boolean	isChild() Is this activity embedded inside of another activity? return mParent != null;
public boolean	isFinishing() Check to see whether this activity is in the process of finishing, either because you called {@link #finish} on it or someone else has requested that it finished. This is often used in {@link #onPause} to determine whether the activity is simply pausing or completely finishing. return If the activity is finishing, returns true; else returns false. see #finish return mFinished;
final boolean	isResumed() return mResumed;
public boolean	isTaskRoot() Return whether this activity is the root of a task. The root is the first activity in a task. return True if this is the root activity, else false. try { return ActivityManagerNative.getDefault() .getTaskForActivity(mToken, true) >= 0; } catch (RemoteException e) { return false; }
void	makeVisible() if (!mWindowAdded) { ViewManager wm = getWindowManager(); wm.addView(mDecor, getWindow().getAttributes()); mWindowAdded = true; } mDecor.setVisibility(View.VISIBLE);
public void	managedCommitUpdates(android.database.Cursor c) Wrapper around {@link Cursor#commitUpdates()} that takes care of noting that the Cursor needs to be requeried. You can call this method in {@link #onPause} or {@link #onStop} to have the system call {@link Cursor#requery} for you if the activity is later resumed. This allows you to avoid determing when to do the requery yourself (which is required for the Cursor to see any data changes that were committed with it). param c The Cursor whose changes are to be committed. see #managedQuery(android.net.Uri , String[], String, String[], String) see #startManagingCursor see Cursor#commitUpdates() see Cursor#requery hide synchronized (mManagedCursors) { final int N = mManagedCursors.size(); for (int i=0; i<N; i++) { ManagedCursor mc = mManagedCursors.get(i); if (mc.mCursor == c) { c.commitUpdates(); mc.mUpdated = true; return; } } throw new RuntimeException( "Cursor " + c + " is not currently managed"); }
public final android.database.Cursor	managedQuery(android.net.Uri uri, java.lang.String[] projection, java.lang.String selection, java.lang.String sortOrder) Wrapper around {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} that gives the resulting {@link Cursor} to call {@link #startManagingCursor} so that the activity will manage its lifecycle for you. param uri The URI of the content provider to query. param projection List of columns to return. param selection SQL WHERE clause. param sortOrder SQL ORDER BY clause. return The Cursor that was returned by query(). see ContentResolver#query(android.net.Uri , String[], String, String[], String) see #startManagingCursor hide Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); if (c != null) { startManagingCursor(c); } return c;
public final android.database.Cursor	managedQuery(android.net.Uri uri, java.lang.String[] projection, java.lang.String selection, java.lang.String[] selectionArgs, java.lang.String sortOrder) Wrapper around {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} that gives the resulting {@link Cursor} to call {@link #startManagingCursor} so that the activity will manage its lifecycle for you. param uri The URI of the content provider to query. param projection List of columns to return. param selection SQL WHERE clause. param selectionArgs The arguments to selection, if any ?s are pesent param sortOrder SQL ORDER BY clause. return The Cursor that was returned by query(). see ContentResolver#query(android.net.Uri , String[], String, String[], String) see #startManagingCursor Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); if (c != null) { startManagingCursor(c); } return c;
private java.lang.IllegalArgumentException	missingDialog(int id) Creates an exception to throw if a user passed in a dialog id that is unexpected. return new IllegalArgumentException("no dialog with id " + id + " was ever " + "shown via Activity#showDialog");
public boolean	moveTaskToBack(boolean nonRoot) Move the task containing this activity to the back of the activity stack. The activity's order within the task is unchanged. param nonRoot If false then this only works if the activity is the root of a task; if true it will work for any activity in a task. return If the task was moved (or it was already at the back) true is returned, else false. try { return ActivityManagerNative.getDefault().moveActivityTaskToBack( mToken, nonRoot); } catch (RemoteException e) { // Empty } return false;
protected void	onActivityResult(int requestCode, int resultCode, android.content.Intent data) Called when an activity you launched exits, giving you the requestCode you started it with, the resultCode it returned, and any additional data from it. The resultCode will be {@link #RESULT_CANCELED} if the activity explicitly returned that, didn't return any result, or crashed during its operation. You will receive this call immediately before onResume() when your activity is re-starting. param requestCode The integer request code originally supplied to startActivityForResult(), allowing you to identify who this result came from. param resultCode The integer result code returned by the child activity through its setResult(). param data An Intent, which can return result data to the caller (various data can be attached to Intent "extras"). see #startActivityForResult see #createPendingResult see #setResult(int)
protected void	onApplyThemeResource(Resources.Theme theme, int resid, boolean first) if (mParent == null) { super.onApplyThemeResource(theme, resid, first); } else { try { theme.setTo(mParent.getTheme()); } catch (Exception e) { // Empty } theme.applyStyle(resid, false); }
protected void	onChildTitleChanged(android.app.Activity childActivity, java.lang.CharSequence title)
public void	onConfigurationChanged(android.content.res.Configuration newConfig) Called by the system when the device configuration changes while your activity is running. Note that this will only be called if you have selected configurations you would like to handle with the {@link android.R.attr#configChanges} attribute in your manifest. If any configuration change occurs that is not selected to be reported by that attribute, then instead of reporting it the system will stop and restart the activity (to have it launched with the new configuration). At the time that this function has been called, your Resources object will have been updated to return resource values matching the new configuration. param newConfig The new device configuration. mCalled = true; // also update search dialog if showing // TODO more generic than just this manager SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchManager.onConfigurationChanged(newConfig); if (mWindow != null) { // Pass the configuration changed event to the window mWindow.onConfigurationChanged(newConfig); }
public void	onContentChanged()
public boolean	onContextItemSelected(android.view.MenuItem item) This hook is called whenever an item in a context menu is selected. The default implementation simply returns false to have the normal processing happen (calling the item's Runnable or sending a message to its Handler as appropriate). You can use this method for any items for which you would like to do processing without those other facilities. Use {@link MenuItem#getMenuInfo()} to get extra information set by the View that added this menu item. Derived classes should call through to the base class for it to perform the default menu handling. param item The context menu item that was selected. return boolean Return false to allow normal context menu processing to proceed, true to consume it here. if (mParent != null) { return mParent.onContextItemSelected(item); } return false;
public void	onContextMenuClosed(android.view.Menu menu) This hook is called whenever the context menu is being closed (either by the user canceling the menu with the back/menu button, or when an item is selected). param menu The context menu that is being closed. if (mParent != null) { mParent.onContextMenuClosed(menu); }
protected void	onCreate(android.os.Bundle savedInstanceState) Called when the activity is starting. This is where most initialization should go: calling {@link #setContentView(int)} to inflate the activity's UI, using {@link #findViewById} to programmatically interact with widgets in the UI, calling {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve cursors for data being displayed, etc. You can call {@link #finish} from within this function, in which case onDestroy() will be immediately called without any of the rest of the activity lifecycle ({@link #onStart}, {@link #onResume}, {@link #onPause}, etc) executing. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. param savedInstanceState If the activity is being re-initialized after previously being shut down then this Bundle contains the data it most recently supplied in {@link #onSaveInstanceState}. Note: Otherwise it is null. see #onStart see #onSaveInstanceState see #onRestoreInstanceState see #onPostCreate mVisibleFromClient = mWindow.getWindowStyle().getBoolean( com.android.internal.R.styleable.Window_windowNoDisplay, true); mCalled = true;
public void	onCreateContextMenu(android.view.ContextMenu menu, android.view.View v, android.view.ContextMenu.ContextMenuInfo menuInfo) Called when a context menu for the {@code view} is about to be shown. Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every time the context menu is about to be shown and should be populated for the view (or item inside the view for {@link AdapterView} subclasses, this can be found in the {@code menuInfo})). Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an item has been selected. It is not safe to hold onto the context menu after this method returns. {@inheritDoc}
public java.lang.CharSequence	onCreateDescription() Generate a new description for this activity. This method is called before pausing the activity and can, if desired, return some textual description of its current state to be displayed to the user. The default implementation returns null, which will cause you to inherit the description from the previous activity. If all activities return null, generally the label of the top activity will be used as the description. return A description of what the user is doing. It should be short and sweet (only a few words). see #onCreateThumbnail see #onSaveInstanceState see #onPause return null;
protected Dialog	onCreateDialog(int id) Callback for creating dialogs that are managed (saved and restored) for you by the activity. If you use {@link #showDialog(int)}, the activity will call through to this method the first time, and hang onto it thereafter. Any dialog that is created by this method will automatically be saved and restored for you, including whether it is showing. If you would like the activity to manage the saving and restoring dialogs for you, you should override this method and handle any ids that are passed to {@link #showDialog}. If you would like an opportunity to prepare your dialog before it is shown, override {@link #onPrepareDialog(int, Dialog)}. param id The id of the dialog. return The dialog see #onPrepareDialog(int, Dialog) see #showDialog(int) see #dismissDialog(int) see #removeDialog(int) return null;
public boolean	onCreateOptionsMenu(android.view.Menu menu) Initialize the contents of the Activity's standard options menu. You should place your menu items in to menu. This is only called once, the first time the options menu is displayed. To update the menu every time it is displayed, see {@link #onPrepareOptionsMenu}. The default implementation populates the menu with standard system menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that they will be correctly ordered with application-defined menu items. Deriving classes should always call through to the base implementation. You can safely hold on to menu (and any items created from it), making modifications to it as desired, until the next time onCreateOptionsMenu() is called. When you add items to the menu, you can implement the Activity's {@link #onOptionsItemSelected} method to handle them there. param menu The options menu in which you place your items. return You must return true for the menu to be displayed; if you return false it will not be shown. see #onPrepareOptionsMenu see #onOptionsItemSelected if (mParent != null) { return mParent.onCreateOptionsMenu(menu); } return true;
public boolean	onCreatePanelMenu(int featureId, android.view.Menu menu) Default implementation of {@link android.view.Window.Callback#onCreatePanelMenu} for activities. This calls through to the new {@link #onCreateOptionsMenu} method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, so that subclasses of Activity don't need to deal with feature codes. if (featureId == Window.FEATURE_OPTIONS_PANEL) { return onCreateOptionsMenu(menu); } return false;
public android.view.View	onCreatePanelView(int featureId) Default implementation of {@link android.view.Window.Callback#onCreatePanelView} for activities. This simply returns null so that all panel sub-windows will have the default menu behavior. return null;
public boolean	onCreateThumbnail(android.graphics.Bitmap outBitmap, android.graphics.Canvas canvas) Generate a new thumbnail for this activity. This method is called before pausing the activity, and should draw into outBitmap the imagery for the desired thumbnail in the dimensions of that bitmap. It can use the given canvas, which is configured to draw into the bitmap, for rendering if desired. The default implementation renders the Screen's current view hierarchy into the canvas to generate a thumbnail. If you return false, the bitmap will be filled with a default thumbnail. param outBitmap The bitmap to contain the thumbnail. param canvas Can be used to render into the bitmap. return Return true if you have drawn into the bitmap; otherwise after you return it will be filled with a default thumbnail. see #onCreateDescription see #onSaveInstanceState see #onPause final View view = mDecor; if (view == null) { return false; } final int vw = view.getWidth(); final int vh = view.getHeight(); final int dw = outBitmap.getWidth(); final int dh = outBitmap.getHeight(); canvas.save(); canvas.scale(((float)dw)/vw, ((float)dh)/vh); view.draw(canvas); canvas.restore(); return true;
public android.view.View	onCreateView(java.lang.String name, android.content.Context context, android.util.AttributeSet attrs) Stub implementation of {@link android.view.LayoutInflater.Factory#onCreateView} used when inflating with the LayoutInflater returned by {@link #getSystemService}. This implementation simply returns null for all view names. see android.view.LayoutInflater#createView see android.view.Window#getLayoutInflater return null;
protected void	onDestroy() Perform any final cleanup before an activity is destroyed. This can happen either because the activity is finishing (someone called {@link #finish} on it, or because the system is temporarily destroying this instance of the activity to save space. You can distinguish between these two scenarios with the {@link #isFinishing} method. Note: do not count on this method being called as a place for saving data! For example, if an activity is editing data in a content provider, those edits should be committed in either {@link #onPause} or {@link #onSaveInstanceState}, not here. This method is usually implemented to free resources like threads that are associated with an activity, so that a destroyed activity does not leave such things around while the rest of its application is still running. There are situations where the system will simply kill the activity's hosting process without calling this method (or any others) in it, so it should not be used to do things that are intended to remain around after the process goes away. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onPause see #onStop see #finish see #isFinishing mCalled = true; // dismiss any dialogs we are managing. if (mManagedDialogs != null) { final int numDialogs = mManagedDialogs.size(); for (int i = 0; i < numDialogs; i++) { final Dialog dialog = mManagedDialogs.valueAt(i); if (dialog.isShowing()) { dialog.dismiss(); } } } // also dismiss search dialog if showing // TODO more generic than just this manager SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchManager.stopSearch(); // close any cursors we are managing. int numCursors = mManagedCursors.size(); for (int i = 0; i < numCursors; i++) { ManagedCursor c = mManagedCursors.get(i); if (c != null) { c.mCursor.close(); } }
public boolean	onKeyDown(int keyCode, android.view.KeyEvent event) Called when a key was pressed down and not handled by any of the views inside of the activity. So, for example, key presses while the cursor is inside a TextView will not trigger the event (unless it is a navigation to another object) because TextView handles its own key presses. If the focused view didn't want this event, this method is called. The default implementation handles KEYCODE_BACK to stop the activity and go back, and other default key handling if configured with {@link #setDefaultKeyMode}. return Return true to prevent this event from being propagated further, or false to indicate that you have not handled this event and it should continue to be propagated. see #onKeyUp see android.view.KeyEvent if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { finish(); return true; } if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { return false; } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { return getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE); } else { // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* boolean clearSpannable = false; boolean handled; if ((event.getRepeatCount() != 0) || event.isSystem()) { clearSpannable = true; handled = false; } else { handled = TextKeyListener.getInstance().onKeyDown(null, mDefaultKeySsb, keyCode, event); if (handled && mDefaultKeySsb.length() > 0) { // something useable has been typed - dispatch it now. final String str = mDefaultKeySsb.toString(); clearSpannable = true; switch (mDefaultKeyMode) { case DEFAULT_KEYS_DIALER: Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); break; case DEFAULT_KEYS_SEARCH_LOCAL: startSearch(str, false, null, false); break; case DEFAULT_KEYS_SEARCH_GLOBAL: startSearch(str, false, null, true); break; } } } if (clearSpannable) { mDefaultKeySsb.clear(); mDefaultKeySsb.clearSpans(); Selection.setSelection(mDefaultKeySsb,0); } return handled; }
public boolean	onKeyMultiple(int keyCode, int repeatCount, android.view.KeyEvent event) Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle the event). return false;
public boolean	onKeyUp(int keyCode, android.view.KeyEvent event) Called when a key was released and not handled by any of the views inside of the activity. So, for example, key presses while the cursor is inside a TextView will not trigger the event (unless it is a navigation to another object) because TextView handles its own key presses. return Return true to prevent this event from being propagated further, or false to indicate that you have not handled this event and it should continue to be propagated. see #onKeyDown see KeyEvent return false;
public void	onLowMemory() mCalled = true;
public boolean	onMenuItemSelected(int featureId, android.view.MenuItem item) Default implementation of {@link android.view.Window.Callback#onMenuItemSelected} for activities. This calls through to the new {@link #onOptionsItemSelected} method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, so that subclasses of Activity don't need to deal with feature codes. switch (featureId) { case Window.FEATURE_OPTIONS_PANEL: // Put event logging here so it gets called even if subclass // doesn't call through to superclass's implmeentation of each // of these methods below EventLog.writeEvent(50000, 0, item.getTitleCondensed()); return onOptionsItemSelected(item); case Window.FEATURE_CONTEXT_MENU: EventLog.writeEvent(50000, 1, item.getTitleCondensed()); return onContextItemSelected(item); default: return false; }
public boolean	onMenuOpened(int featureId, android.view.Menu menu) {@inheritDoc} return The default implementation returns true. return true;
protected void	onNewIntent(android.content.Intent intent) This is called for activities that set launchMode to "singleTop" in their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag when calling {@link #startActivity}. In either case, when the activity is re-launched while at the top of the activity stack instead of a new instance of the activity being started, onNewIntent() will be called on the existing instance with the Intent that was used to re-launch it. An activity will always be paused before receiving a new intent, so you can count on {@link #onResume} being called after this method. Note that {@link #getIntent} still returns the original Intent. You can use {@link #setIntent} to update it to this new Intent. param intent The new intent that was started for the activity. see #getIntent see #setIntent see #onResume
public boolean	onOptionsItemSelected(android.view.MenuItem item) This hook is called whenever an item in your options menu is selected. The default implementation simply returns false to have the normal processing happen (calling the item's Runnable or sending a message to its Handler as appropriate). You can use this method for any items for which you would like to do processing without those other facilities. Derived classes should call through to the base class for it to perform the default menu handling. param item The menu item that was selected. return boolean Return false to allow normal menu processing to proceed, true to consume it here. see #onCreateOptionsMenu if (mParent != null) { return mParent.onOptionsItemSelected(item); } return false;
public void	onOptionsMenuClosed(android.view.Menu menu) This hook is called whenever the options menu is being closed (either by the user canceling the menu with the back/menu button, or when an item is selected). param menu The options menu as last shown or first initialized by onCreateOptionsMenu(). if (mParent != null) { mParent.onOptionsMenuClosed(menu); }
public void	onPanelClosed(int featureId, android.view.Menu menu) Default implementation of {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for activities. This calls through to {@link #onOptionsMenuClosed(Menu)} method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, so that subclasses of Activity don't need to deal with feature codes. For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the {@link #onContextMenuClosed(Menu)} will be called. switch (featureId) { case Window.FEATURE_OPTIONS_PANEL: onOptionsMenuClosed(menu); break; case Window.FEATURE_CONTEXT_MENU: onContextMenuClosed(menu); break; }
protected void	onPause() Called as part of the activity lifecycle when an activity is going into the background, but has not (yet) been killed. The counterpart to {@link #onResume}. When activity B is launched in front of activity A, this callback will be invoked on A. B will not be created until A's {@link #onPause} returns, so be sure to not do anything lengthy here. This callback is mostly used for saving any persistent state the activity is editing, to present a "edit in place" model to the user and making sure nothing is lost if there are not enough resources to start the new activity without first killing this one. This is also a good place to do things like stop animations and other things that consume a noticeable mount of CPU in order to make the switch to the next activity as fast as possible, or to close resources that are exclusive access such as the camera. In situations where the system needs more memory it may kill paused processes to reclaim resources. Because of this, you should be sure that all of your state is saved by the time you return from this function. In general {@link #onSaveInstanceState} is used to save per-instance state in the activity and this method is used to store global persistent data (in content providers, files, etc.) After receiving this call you will usually receive a following call to {@link #onStop} (after the next activity has been resumed and displayed), however in some cases there will be a direct call back to {@link #onResume} without going through the stopped state. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onResume see #onSaveInstanceState see #onStop mCalled = true;
protected void	onPostCreate(android.os.Bundle savedInstanceState) Called when activity start-up is complete (after {@link #onStart} and {@link #onRestoreInstanceState} have been called). Applications will generally not implement this method; it is intended for system classes to do final initialization after application code has run. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. param savedInstanceState If the activity is being re-initialized after previously being shut down then this Bundle contains the data it most recently supplied in {@link #onSaveInstanceState}. Note: Otherwise it is null. see #onCreate if (!isChild()) { mTitleReady = true; onTitleChanged(getTitle(), getTitleColor()); } mCalled = true;
protected void	onPostResume() Called when activity resume is complete (after {@link #onResume} has been called). Applications will generally not implement this method; it is intended for system classes to do final setup after application resume code has run. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onResume final Window win = getWindow(); if (win != null) win.makeActive(); mCalled = true;
protected void	onPrepareDialog(int id, Dialog dialog) Provides an opportunity to prepare a managed dialog before it is being shown. Override this if you need to update a managed dialog based on the state of the application each time it is shown. For example, a time picker dialog might want to be updated with the current time. You should call through to the superclass's implementation. The default implementation will set this Activity as the owner activity on the Dialog. param id The id of the managed dialog. param dialog The dialog. see #onCreateDialog(int) see #showDialog(int) see #dismissDialog(int) see #removeDialog(int) dialog.setOwnerActivity(this);
public boolean	onPrepareOptionsMenu(android.view.Menu menu) Prepare the Screen's standard options menu to be displayed. This is called right before the menu is shown, every time it is shown. You can use this method to efficiently enable/disable items or otherwise dynamically modify the contents. The default implementation updates the system menu items based on the activity's state. Deriving classes should always call through to the base class implementation. param menu The options menu as last shown or first initialized by onCreateOptionsMenu(). return You must return true for the menu to be displayed; if you return false it will not be shown. see #onCreateOptionsMenu if (mParent != null) { return mParent.onPrepareOptionsMenu(menu); } return true;
public boolean	onPreparePanel(int featureId, android.view.View view, android.view.Menu menu) Default implementation of {@link android.view.Window.Callback#onPreparePanel} for activities. This calls through to the new {@link #onPrepareOptionsMenu} method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, so that subclasses of Activity don't need to deal with feature codes. if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { boolean goforit = onPrepareOptionsMenu(menu); return goforit && menu.hasVisibleItems(); } return true;
protected void	onRestart() Called after {@link #onStop} when the current activity is being re-displayed to the user (the user has navigated back to it). It will be followed by {@link #onStart} and then {@link #onResume}. For activities that are using raw {@link Cursor} objects (instead of creating them through {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, this is usually the place where the cursor should be requeried (because you had deactivated it in {@link #onStop}. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onStop see #onStart see #onResume mCalled = true;
protected void	onRestoreInstanceState(android.os.Bundle savedInstanceState) This method is called after {@link #onStart} when the activity is being re-initialized from a previously saved state, given here in state. Most implementations will simply use {@link #onCreate} to restore their state, but it is sometimes convenient to do it here after all of the initialization has been done or to allow subclasses to decide whether to use your default implementation. The default implementation of this method performs a restore of any view state that had previously been frozen by {@link #onSaveInstanceState}. This method is called between {@link #onStart} and {@link #onPostCreate}. param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. see #onCreate see #onPostCreate see #onResume see #onSaveInstanceState if (mWindow != null) { Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); if (windowState != null) { mWindow.restoreHierarchyState(windowState); } }
protected void	onResume() Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or {@link #onPause}, for your activity to start interacting with the user. This is a good place to begin animations, open exclusive-access devices (such as the camera), etc. Keep in mind that onResume is not the best indicator that your activity is visible to the user; a system window such as the keyguard may be in front. Use {@link #onWindowFocusChanged} to know for certain that your activity is visible to the user (for example, to resume a game). Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onRestoreInstanceState see #onRestart see #onPostResume see #onPause mCalled = true;
java.util.HashMap	onRetainNonConfigurationChildInstances() This method is similar to {@link #onRetainNonConfigurationInstance()} except that it should return either a mapping from child activity id strings to arbitrary objects, or null. This method is intended to be used by Activity framework subclasses that control a set of child activities, such as ActivityGroup. The same guarantees and restrictions apply as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. return null;
public java.lang.Object	onRetainNonConfigurationInstance() Called by the system, as part of destroying an activity due to a configuration change, when it is known that a new instance will immediately be created for the new configuration. You can return any object you like here, including the activity instance itself, which can later be retrieved by calling {@link #getLastNonConfigurationInstance()} in the new activity instance. This function is called purely as an optimization, and you must not rely on it being called. When it is called, a number of guarantees will be made to help optimize configuration switching: The function will be called between {@link #onStop} and {@link #onDestroy}. A new instance of the activity will always be immediately created after this one's {@link #onDestroy()} is called. The object you return here will always be available from the {@link #getLastNonConfigurationInstance()} method of the following activity instance as described there. These guarantees are designed so that an activity can use this API to propagate extensive state from the old to new activity instance, from loaded bitmaps, to network connections, to evenly actively running threads. Note that you should not propagate any data that may change based on the configuration, including any data loaded from resources such as strings, layouts, or drawables. return Return any Object holding the desired state to propagate to the next activity instance. return null;
protected void	onSaveInstanceState(android.os.Bundle outState) Called to retrieve per-instance state from an activity before being killed so that the state can be restored in {@link #onCreate} or {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method will be passed to both). This method is called before an activity may be killed so that when it comes back some time in the future it can restore its state. For example, if activity B is launched in front of activity A, and at some point activity A is killed to reclaim resources, activity A will have a chance to save the current state of its user interface via this method so that when the user returns to activity A, the state of the user interface can be restored via {@link #onCreate} or {@link #onRestoreInstanceState}. Do not confuse this method with activity lifecycle callbacks such as {@link #onPause}, which is always called when an activity is being placed in the background or on its way to destruction, or {@link #onStop} which is called before destruction. One example of when {@link #onPause} and {@link #onStop} is called and not this method is when a user navigates back from activity B to activity A: there is no need to call {@link #onSaveInstanceState} on B because that particular instance will never be restored, so the system avoids calling it. An example when {@link #onPause} is called and not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't killed during the lifetime of B since the state of the user interface of A will stay intact. The default implementation takes care of most of the UI per-instance state for you by calling {@link android.view.View#onSaveInstanceState()} on each view in the hierarchy that has an id, and by saving the id of the currently focused view (all of which is restored by the default implementation of {@link #onRestoreInstanceState}). If you override this method to save additional information not captured by each individual view, you will likely want to call through to the default implementation, otherwise be prepared to save all of the state of each view yourself. If called, this method will occur before {@link #onStop}. There are no guarantees about whether it will occur before or after {@link #onPause}. param outState Bundle in which to place your saved state. see #onCreate see #onRestoreInstanceState see #onPause outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState());
public boolean	onSearchRequested() This hook is called when the user signals the desire to start a search. You can use this function as a simple way to launch the search UI, in response to a menu item, search button, or other widgets within your activity. Unless overidden, calling this function is the same as calling: The default implementation simply calls {@link #startSearch startSearch(null, false, null, false)}, launching a local search. You can override this function to force global search, e.g. in response to a dedicated search key, or to block search entirely (by simply returning false). return Returns true if search launched, false if activity blocks it see android.app.SearchManager startSearch(null, false, null, false); return true;
protected void	onStart() Called after {@link #onCreate} — or after {@link #onRestart} when the activity had been stopped, but is now again being displayed to the user. It will be followed by {@link #onResume}. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onCreate see #onStop see #onResume mCalled = true;
protected void	onStop() Called when you are no longer visible to the user. You will next receive either {@link #onRestart}, {@link #onDestroy}, or nothing, depending on later user activity. Note that this method may never be called, in low memory situations where the system does not have enough memory to keep your activity's process running after its {@link #onPause} method is called. Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown. see #onRestart see #onResume see #onSaveInstanceState see #onDestroy mCalled = true;
protected void	onTitleChanged(java.lang.CharSequence title, int color) if (mTitleReady) { final Window win = getWindow(); if (win != null) { win.setTitle(title); if (color != 0) { win.setTitleColor(color); } } }
public boolean	onTouchEvent(android.view.MotionEvent event) Called when a touch screen event was not handled by any of the views under it. This is most useful to process touch events that happen outside of your window bounds, where there is no view to receive it. param event The touch screen event being processed. return Return true if you have consumed the event, false if you haven't. The default implementation always returns false. return false;
public boolean	onTrackballEvent(android.view.MotionEvent event) Called when the trackball was moved and not handled by any of the views inside of the activity. So, for example, if the trackball moves while focus is on a button, you will receive a call here because buttons do not normally do anything with trackball events. The call here happens before trackball movements are converted to DPAD key events, which then get sent back to the view hierarchy, and will be processed at the point for things like focus navigation. param event The trackball event being processed. return Return true if you have consumed the event, false if you haven't. The default implementation always returns false. return false;
public void	onUserInteraction() Called whenever a key, touch, or trackball event is dispatched to the activity. Implement this method if you wish to know that the user has interacted with the device in some way while your activity is running. This callback and {@link #onUserLeaveHint} are intended to help activities manage status bar notifications intelligently; specifically, for helping activities determine the proper time to cancel a notfication. All calls to your activity's {@link #onUserLeaveHint} callback will be accompanied by calls to {@link #onUserInteraction}. This ensures that your activity will be told of relevant user activity such as pulling down the notification pane and touching an item there. Note that this callback will be invoked for the touch down action that begins a touch gesture, but may not be invoked for the touch-moved and touch-up actions that follow. see #onUserLeaveHint()
protected void	onUserLeaveHint() Called as part of the activity lifecycle when an activity is about to go into the background as the result of user choice. For example, when the user presses the Home key, {@link #onUserLeaveHint} will be called, but when an incoming phone call causes the in-call Activity to be automatically brought to the foreground, {@link #onUserLeaveHint} will not be called on the activity being interrupted. In cases when it is invoked, this method is called right before the activity's {@link #onPause} callback. This callback and {@link #onUserInteraction} are intended to help activities manage status bar notifications intelligently; specifically, for helping activities determine the proper time to cancel a notfication. see #onUserInteraction()
public void	onWindowAttributesChanged(WindowManager.LayoutParams params) // Update window manager if: we have a view, that view is // attached to its parent (which will be a RootView), and // this activity is not embedded. if (mParent == null) { View decor = mDecor; if (decor != null && decor.getParent() != null) { getWindowManager().updateViewLayout(decor, params); } }
public void	onWindowFocusChanged(boolean hasFocus) Called when the current {@link Window} of the activity gains or loses focus. This is the best indicator of whether this activity is visible to the user. Note that this provides information what global focus state, which is managed independently of activity lifecycles. As such, while focus changes will generally have some relation to lifecycle changes (an activity that is stopped will not generally get window focus), you should not rely on any particular order between the callbacks here and those in the other lifecycle methods such as {@link #onResume}. As a general rule, however, a resumed activity will have window focus... unless it has displayed other dialogs or popups that take input focus, in which case the activity itself will not have focus when the other windows have it. Likewise, the system may display system-level windows (such as the status bar notification panel or a system alert) which will temporarily take window input focus without pausing the foreground activity. param hasFocus Whether the window of this activity has focus. see #hasWindowFocus() see #onResume
public void	openContextMenu(android.view.View view) Programmatically opens the context menu for a particular {@code view}. The {@code view} should have been added via {@link #registerForContextMenu(View)}. param view The view to show the context menu for. view.showContextMenu();
public void	openOptionsMenu() Programmatically opens the options menu. If the options menu is already open, this method does nothing. mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null);
final void	performPause() onPause();
final void	performRestart() final int N = mManagedCursors.size(); for (int i=0; i<N; i++) { ManagedCursor mc = mManagedCursors.get(i); if (mc.mReleased || mc.mUpdated) { mc.mCursor.requery(); mc.mReleased = false; mc.mUpdated = false; } } if (mStopped) { mStopped = false; mCalled = false; mInstrumentation.callActivityOnRestart(this); if (!mCalled) { throw new SuperNotCalledException( "Activity " + mComponent.toShortString() + " did not call through to super.onRestart()"); } performStart(); }
final void	performRestoreInstanceState(android.os.Bundle savedInstanceState) The hook for {@link ActivityThread} to restore the state of this activity. Calls {@link #onSaveInstanceState(android.os.Bundle)} and {@link #restoreManagedDialogs(android.os.Bundle)}. param savedInstanceState contains the saved state onRestoreInstanceState(savedInstanceState); restoreManagedDialogs(savedInstanceState); // Also restore the state of a search dialog (if any) // TODO more generic than just this manager SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchManager.restoreSearchDialog(savedInstanceState, SAVED_SEARCH_DIALOG_KEY);
final void	performResume() performRestart(); mLastNonConfigurationInstance = null; // First call onResume() -before- setting mResumed, so we don't // send out any status bar / menu notifications the client makes. mCalled = false; mInstrumentation.callActivityOnResume(this); if (!mCalled) { throw new SuperNotCalledException( "Activity " + mComponent.toShortString() + " did not call through to super.onResume()"); } // Now really resume, and install the current status bar and menu. mResumed = true; mCalled = false; onPostResume(); if (!mCalled) { throw new SuperNotCalledException( "Activity " + mComponent.toShortString() + " did not call through to super.onPostResume()"); }
final void	performSaveInstanceState(android.os.Bundle outState) The hook for {@link ActivityThread} to save the state of this activity. Calls {@link #onSaveInstanceState(android.os.Bundle)} and {@link #saveManagedDialogs(android.os.Bundle)}. param outState The bundle to save the state to. onSaveInstanceState(outState); saveManagedDialogs(outState); // Also save the state of a search dialog (if any) // TODO more generic than just this manager SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchManager.saveSearchDialog(outState, SAVED_SEARCH_DIALOG_KEY);
final void	performStart() mCalled = false; mInstrumentation.callActivityOnStart(this); if (!mCalled) { throw new SuperNotCalledException( "Activity " + mComponent.toShortString() + " did not call through to super.onStart()"); }
final void	performStop() if (!mStopped) { if (mWindow != null) { mWindow.closeAllPanels(); } mCalled = false; mInstrumentation.callActivityOnStop(this); if (!mCalled) { throw new SuperNotCalledException( "Activity " + mComponent.toShortString() + " did not call through to super.onStop()"); } final int N = mManagedCursors.size(); for (int i=0; i<N; i++) { ManagedCursor mc = mManagedCursors.get(i); if (!mc.mReleased) { mc.mCursor.deactivate(); mc.mReleased = true; } } mStopped = true; } mResumed = false;
final void	performUserLeaving() onUserInteraction(); onUserLeaveHint();
public void	registerForContextMenu(android.view.View view) Registers a context menu to be shown for the given view (multiple views can show the context menu). This method will set the {@link OnCreateContextMenuListener} on the view to this activity, so {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be called when it is time to show the context menu. see #unregisterForContextMenu(View) param view The view that should show a context menu. view.setOnCreateContextMenuListener(this);
public final void	removeDialog(int id) Removes any internal references to a dialog managed by this Activity. If the dialog is showing, it will dismiss it as part of the clean up. This can be useful if you know that you will never show a dialog again and want to avoid the overhead of saving and restoring it in the future. param id The id of the managed dialog. see #onCreateDialog(int) see #onPrepareDialog(int, Dialog) see #showDialog(int) see #dismissDialog(int) if (mManagedDialogs == null) { return; } final Dialog dialog = mManagedDialogs.get(id); if (dialog == null) { return; } dialog.dismiss(); mManagedDialogs.remove(id);
public final boolean	requestWindowFeature(int featureId) Enable extended window features. This is a convenience for calling {@link android.view.Window#requestFeature getWindow().requestFeature()}. param featureId The desired feature as defined in {@link android.view.Window}. return Returns true if the requested feature is supported and now enabled. see android.view.Window#requestFeature return getWindow().requestFeature(featureId);
private void	restoreManagedDialogs(android.os.Bundle savedInstanceState) Restore the state of any saved managed dialogs. param savedInstanceState The bundle to restore from. final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); if (b == null) { return; } final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); final int numDialogs = ids.length; mManagedDialogs = new SparseArray<Dialog>(numDialogs); for (int i = 0; i < numDialogs; i++) { final Integer dialogId = ids[i]; Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); if (dialogState != null) { final Dialog dialog = onCreateDialog(dialogId); dialog.onRestoreInstanceState(dialogState); mManagedDialogs.put(dialogId, dialog); } }
public final void	runOnUiThread(java.lang.Runnable action) Runs the specified action on the UI thread. If the current thread is the UI thread, then the action is executed immediately. If the current thread is not the UI thread, the action is posted to the event queue of the UI thread. param action the action to run on the UI thread if (Thread.currentThread() != mUiThread) { mHandler.post(action); } else { action.run(); }
private void	saveManagedDialogs(android.os.Bundle outState) Save the state of any managed dialogs. param outState place to store the saved state. if (mManagedDialogs == null) { return; } final int numDialogs = mManagedDialogs.size(); if (numDialogs == 0) { return; } Bundle dialogState = new Bundle(); int[] ids = new int[mManagedDialogs.size()]; // save each dialog's bundle, gather the ids for (int i = 0; i < numDialogs; i++) { final int key = mManagedDialogs.keyAt(i); ids[i] = key; final Dialog dialog = mManagedDialogs.valueAt(i); dialogState.putBundle(savedDialogKeyFor(key), dialog.onSaveInstanceState()); } dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); outState.putBundle(SAVED_DIALOGS_TAG, dialogState);
private java.lang.String	savedDialogKeyFor(int key) return SAVED_DIALOG_KEY_PREFIX + key;
public void	setContentView(int layoutResID) Set the activity content from a layout resource. The resource will be inflated, adding all top-level views to the activity. param layoutResID Resource ID to be inflated. getWindow().setContentView(layoutResID);
public void	setContentView(android.view.View view) Set the activity content to an explicit view. This view is placed directly into the activity's view hierarchy. It can itself be a complex view hierarhcy. param view The desired content to display. getWindow().setContentView(view);
public void	setContentView(android.view.View view, ViewGroup.LayoutParams params) Set the activity content to an explicit view. This view is placed directly into the activity's view hierarchy. It can itself be a complex view hierarhcy. param view The desired content to display. param params Layout parameters for the view. getWindow().setContentView(view, params);
public final void	setDefaultKeyMode(int mode) Select the default key handling for this activity. This controls what will happen to key events that are not otherwise handled. The default mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the floor. Other modes allow you to launch the dialer ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options menu without requiring the menu key be held down ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). Note that the mode selected here does not impact the default handling of system keys, such as the "back" and "menu" keys, and your activity and its views always get a first chance to receive and handle all application keys. param mode The desired default key mode constant. see #DEFAULT_KEYS_DISABLE see #DEFAULT_KEYS_DIALER see #DEFAULT_KEYS_SHORTCUT see #DEFAULT_KEYS_SEARCH_LOCAL see #DEFAULT_KEYS_SEARCH_GLOBAL see #onKeyDown mDefaultKeyMode = mode; // Some modes use a SpannableStringBuilder to track & dispatch input events // This list must remain in sync with the switch in onKeyDown() switch (mode) { case DEFAULT_KEYS_DISABLE: case DEFAULT_KEYS_SHORTCUT: mDefaultKeySsb = null; // not used in these modes break; case DEFAULT_KEYS_DIALER: case DEFAULT_KEYS_SEARCH_LOCAL: case DEFAULT_KEYS_SEARCH_GLOBAL: mDefaultKeySsb = new SpannableStringBuilder(); Selection.setSelection(mDefaultKeySsb,0); break; default: throw new IllegalArgumentException(); }
public final void	setFeatureDrawable(int featureId, android.graphics.drawable.Drawable drawable) Convenience for calling {@link android.view.Window#setFeatureDrawable(int, Drawable)}. getWindow().setFeatureDrawable(featureId, drawable);
public final void	setFeatureDrawableAlpha(int featureId, int alpha) Convenience for calling {@link android.view.Window#setFeatureDrawableAlpha}. getWindow().setFeatureDrawableAlpha(featureId, alpha);
public final void	setFeatureDrawableResource(int featureId, int resId) Convenience for calling {@link android.view.Window#setFeatureDrawableResource}. getWindow().setFeatureDrawableResource(featureId, resId);
public final void	setFeatureDrawableUri(int featureId, android.net.Uri uri) Convenience for calling {@link android.view.Window#setFeatureDrawableUri}. getWindow().setFeatureDrawableUri(featureId, uri);
public void	setIntent(android.content.Intent newIntent) Change the intent returned by {@link #getIntent}. This holds a reference to the given intent; it does not copy it. Often used in conjunction with {@link #onNewIntent}. param newIntent The new Intent object to return from getIntent see #getIntent see #onNewIntent mIntent = newIntent;
final void	setParent(android.app.Activity parent) mParent = parent;
public void	setPersistent(boolean isPersistent) Control whether this activity is required to be persistent. By default activities are not persistent; setting this to true will prevent the system from stopping this activity or its process when running low on resources. You should avoid using this method, it has severe negative consequences on how well the system can manage its resources. A better approach is to implement an application service that you control with {@link Context#startService} and {@link Context#stopService}. param isPersistent Control whether the current activity must be persistent, true if so, false for the normal behavior. if (mParent == null) { try { ActivityManagerNative.getDefault() .setPersistent(mToken, isPersistent); } catch (RemoteException e) { // Empty } } else { throw new RuntimeException("setPersistent() not yet supported for embedded activities"); }
public final void	setProgress(int progress) Sets the progress for the progress bars in the title. In order for the progress bar to be shown, the feature must be requested via {@link #requestWindowFeature(int)}. param progress The progress for the progress bar. Valid ranges are from 0 to 10000 (both inclusive). If 10000 is given, the progress bar will be completely filled and will fade out. getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START);
public final void	setProgressBarIndeterminate(boolean indeterminate) Sets whether the horizontal progress bar in the title should be indeterminate (the circular is always indeterminate). In order for the progress bar to be shown, the feature must be requested via {@link #requestWindowFeature(int)}. param indeterminate Whether the horizontal progress bar should be indeterminate. getWindow().setFeatureInt(Window.FEATURE_PROGRESS, indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF);
public final void	setProgressBarIndeterminateVisibility(boolean visible) Sets the visibility of the indeterminate progress bar in the title. In order for the progress bar to be shown, the feature must be requested via {@link #requestWindowFeature(int)}. param visible Whether to show the progress bars in the title. getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF);
public final void	setProgressBarVisibility(boolean visible) Sets the visibility of the progress bar in the title. In order for the progress bar to be shown, the feature must be requested via {@link #requestWindowFeature(int)}. param visible Whether to show the progress bars in the title. getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF);
public void	setRequestedOrientation(int requestedOrientation) Change the desired orientation of this activity. If the activity is currently in the foreground or otherwise impacting the screen orientation, the screen will immediately be changed (possibly causing the activity to be restarted). Otherwise, this will be used the next time the activity is visible. param requestedOrientation An orientation constant as used in {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. if (mParent == null) { try { ActivityManagerNative.getDefault().setRequestedOrientation( mToken, requestedOrientation); } catch (RemoteException e) { // Empty } } else { mParent.setRequestedOrientation(requestedOrientation); }
public final void	setResult(int resultCode) Call this to set the result that your activity will return to its caller. param resultCode The result code to propagate back to the originating activity, often RESULT_CANCELED or RESULT_OK see #RESULT_CANCELED see #RESULT_OK see #RESULT_FIRST_USER see #setResult(int, Intent) synchronized (this) { mResultCode = resultCode; mResultData = null; }
public final void	setResult(int resultCode, android.content.Intent data) Call this to set the result that your activity will return to its caller. param resultCode The result code to propagate back to the originating activity, often RESULT_CANCELED or RESULT_OK param data The data to propagate back to the originating activity. see #RESULT_CANCELED see #RESULT_OK see #RESULT_FIRST_USER see #setResult(int) synchronized (this) { mResultCode = resultCode; mResultData = data; }
public final void	setSecondaryProgress(int secondaryProgress) Sets the secondary progress for the progress bar in the title. This progress is drawn between the primary progress (set via {@link #setProgress(int)} and the background. It can be ideal for media scenarios such as showing the buffering progress while the default progress shows the play progress. In order for the progress bar to be shown, the feature must be requested via {@link #requestWindowFeature(int)}. param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 0 to 10000 (both inclusive). getWindow().setFeatureInt(Window.FEATURE_PROGRESS, secondaryProgress + Window.PROGRESS_SECONDARY_START);
public void	setTitle(java.lang.CharSequence title) Change the title associated with this activity. If this is a top-level activity, the title for its window will change. If it is an embedded activity, the parent can do whatever it wants with it. mTitle = title; onTitleChanged(title, mTitleColor); if (mParent != null) { mParent.onChildTitleChanged(this, title); }
public void	setTitle(int titleId) Change the title associated with this activity. If this is a top-level activity, the title for its window will change. If it is an embedded activity, the parent can do whatever it wants with it. setTitle(getText(titleId));
public void	setTitleColor(int textColor) mTitleColor = textColor; onTitleChanged(mTitle, textColor);
public void	setVisible(boolean visible) Control whether this activity's main window is visible. This is intended only for the special case of an activity that is not going to show a UI itself, but can't just finish prior to onResume() because it needs to wait for a service binding or such. Setting this to false allows you to prevent your UI from being shown during that time. The default value for this is taken from the {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. if (mVisibleFromClient != visible) { mVisibleFromClient = visible; if (mVisibleFromServer) { if (visible) makeVisible(); else mDecor.setVisibility(View.INVISIBLE); } }
public final void	setVolumeControlStream(int streamType) Suggests an audio stream whose volume should be changed by the hardware volume controls. The suggested audio stream will be tied to the window of this Activity. If the Activity is switched, the stream set here is no longer the suggested stream. The client does not need to save and restore the old suggested stream value in onPause and onResume. param streamType The type of the audio stream whose volume should be changed by the hardware volume controls. It is not guaranteed that the hardware volume controls will always change this stream's volume (for example, if a call is in progress, its stream's volume may be changed instead). To reset back to the default, use {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. getWindow().setVolumeControlStream(streamType);
public final void	showDialog(int id) Show a dialog managed by this activity. A call to {@link #onCreateDialog(int)} will be made with the same id the first time this is called for a given id. From thereafter, the dialog will be automatically saved and restored. Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog)} will be made to provide an opportunity to do any timely preparation. param id The id of the managed dialog. see #onCreateDialog(int) see #onPrepareDialog(int, Dialog) see #dismissDialog(int) see #removeDialog(int) if (mManagedDialogs == null) { mManagedDialogs = new SparseArray<Dialog>(); } Dialog dialog = mManagedDialogs.get(id); if (dialog == null) { dialog = onCreateDialog(id); if (dialog == null) { throw new IllegalArgumentException("Activity#onCreateDialog did " + "not create a dialog for id " + id); } dialog.dispatchOnCreate(null); mManagedDialogs.put(id, dialog); } onPrepareDialog(id, dialog); dialog.show();
public void	startActivity(android.content.Intent intent) Launch a new activity. You will not receive any information about when the activity exits. This implementation overrides the base version, providing information about the activity performing the launch. Because of this additional information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not required; if not specified, the new activity will be added to the task of the caller. This method throws {@link android.content.ActivityNotFoundException} if there was no Activity found to run the given Intent. param intent The intent to start. throws android.content.ActivityNotFoundException see #startActivityForResult startActivityForResult(intent, -1);
public void	startActivityForResult(android.content.Intent intent, int requestCode) Launch an activity for which you would like a result when it finished. When this activity exits, your onActivityResult() method will be called with the given requestCode. Using a negative requestCode is the same as calling {@link #startActivity} (the activity is not launched as a sub-activity). Note that this method should only be used with Intent protocols that are defined to return a result. In other protocols (such as {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may not get the result when you expect. For example, if the activity you are launching uses the singleTask launch mode, it will not run in your task and thus you will immediately receive a cancel result. As a special case, if you call startActivityForResult() with a requestCode >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your activity, then your window will not be displayed until a result is returned back from the started activity. This is to avoid visible flickering when redirecting to another activity. This method throws {@link android.content.ActivityNotFoundException} if there was no Activity found to run the given Intent. param intent The intent to start. param requestCode If >= 0, this code will be returned in onActivityResult() when the activity exits. throws android.content.ActivityNotFoundException see #startActivity if (mParent == null) { Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode); if (ar != null) { mMainThread.sendActivityResult( mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); } if (requestCode >= 0) { // If this start is requesting a result, we can avoid making // the activity visible until the result is received. Setting // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the // activity hidden during this time, to avoid flickering. // This can only be done when a result is requested because // that guarantees we will get information back when the // activity is finished, no matter what happens to it. mStartedActivity = true; } } else { mParent.startActivityFromChild(this, intent, requestCode); }
public void	startActivityFromChild(android.app.Activity child, android.content.Intent intent, int requestCode) This is called when a child activity of this one calls its {@link #startActivity} or {@link #startActivityForResult} method. This method throws {@link android.content.ActivityNotFoundException} if there was no Activity found to run the given Intent. param child The activity making the call. param intent The intent to start. param requestCode Reply request code. < 0 if reply is not requested. throws android.content.ActivityNotFoundException see #startActivity see #startActivityForResult Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( this, mMainThread.getApplicationThread(), mToken, child, intent, requestCode); if (ar != null) { mMainThread.sendActivityResult( mToken, child.mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); }
public boolean	startActivityIfNeeded(android.content.Intent intent, int requestCode) A special variation to launch an activity only if a new activity instance is needed to handle the given Intent. In other words, this is just like {@link #startActivityForResult(Intent, int)} except: if you are using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or singleTask or singleTop {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, and the activity that handles intent is the same as your currently running activity, then a new instance is not needed. In this case, instead of the normal behavior of calling {@link #onNewIntent} this function will return and you can handle the Intent yourself. This function can only be called from a top-level activity; if it is called from a child activity, a runtime exception will be thrown. param intent The intent to start. param requestCode If >= 0, this code will be returned in onActivityResult() when the activity exits, as described in {@link #startActivityForResult}. return If a new activity was launched then true is returned; otherwise false is returned and you must handle the Intent yourself. see #startActivity see #startActivityForResult if (mParent == null) { int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; try { result = ActivityManagerNative.getDefault() .startActivity(mMainThread.getApplicationThread(), intent, intent.resolveTypeIfNeeded( getContentResolver()), null, 0, mToken, mEmbeddedID, requestCode, true, false); } catch (RemoteException e) { // Empty } Instrumentation.checkStartActivityResult(result, intent); if (requestCode >= 0) { // If this start is requesting a result, we can avoid making // the activity visible until the result is received. Setting // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the // activity hidden during this time, to avoid flickering. // This can only be done when a result is requested because // that guarantees we will get information back when the // activity is finished, no matter what happens to it. mStartedActivity = true; } return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; } throw new UnsupportedOperationException( "startActivityIfNeeded can only be called from a top-level activity");
public void	startManagingCursor(android.database.Cursor c) This method allows the activity to take care of managing the given {@link Cursor}'s lifecycle for you based on the activity's lifecycle. That is, when the activity is stopped it will automatically call {@link Cursor#deactivate} on the given Cursor, and when it is later restarted it will call {@link Cursor#requery} for you. When the activity is destroyed, all managed Cursors will be closed automatically. param c The Cursor to be managed. see #managedQuery(android.net.Uri , String[], String, String[], String) see #stopManagingCursor synchronized (mManagedCursors) { mManagedCursors.add(new ManagedCursor(c)); }
public boolean	startNextMatchingActivity(android.content.Intent intent) Special version of starting an activity, for use when you are replacing other activity components. You can use this to hand the Intent off to the next Activity that can handle it. You typically call this in {@link #onCreate} with the Intent returned by {@link #getIntent}. param intent The intent to dispatch to the next activity. For correct behavior, this must be the same as the Intent that started your own activity; the only changes you can make are to the extras inside of it. return Returns a boolean indicating whether there was another Activity to start: true if there was a next activity to start, false if there wasn't. In general, if true is returned you will then want to call finish() on yourself. if (mParent == null) { try { return ActivityManagerNative.getDefault() .startNextMatchingActivity(mToken, intent); } catch (RemoteException e) { // Empty } return false; } throw new UnsupportedOperationException( "startNextMatchingActivity can only be called from a top-level activity");
public void	startSearch(java.lang.String initialQuery, boolean selectInitialQuery, android.os.Bundle appSearchData, boolean globalSearch) This hook is called to launch the search UI. It is typically called from onSearchRequested(), either directly from Activity.onSearchRequested() or from an overridden version in any given Activity. If your goal is simply to activate search, it is preferred to call onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal is to inject specific data such as context data, it is preferred to override onSearchRequested(), so that any callers to it will benefit from the override. param initialQuery Any non-null non-empty string will be inserted as pre-entered text in the search query box. param selectInitialQuery If true, the intial query will be preselected, which means that any further typing will replace it. This is useful for cases where an entire pre-formed query is being inserted. If false, the selection point will be placed at the end of the inserted query. This is useful when the inserted query is text that the user entered, and the user would expect to be able to keep typing. This parameter is only meaningful if initialQuery is a non-empty string. param appSearchData An application can insert application-specific context here, in order to improve quality or specificity of its own searches. This data will be returned with SEARCH intent(s). Null if no extra data is required. param globalSearch If false, this will only launch the search that has been specifically defined by the application (which is usually defined as a local search). If no default search is defined in the current application or activity, no search will be launched. If true, this will always launch a platform-global (e.g. web-based) search instead. see android.app.SearchManager see #onSearchRequested // activate the search manager and start it up! SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), appSearchData, globalSearch);
public void	stopManagingCursor(android.database.Cursor c) Given a Cursor that was previously given to {@link #startManagingCursor}, stop the activity's management of that cursor. param c The Cursor that was being managed. see #startManagingCursor synchronized (mManagedCursors) { final int N = mManagedCursors.size(); for (int i=0; i<N; i++) { ManagedCursor mc = mManagedCursors.get(i); if (mc.mCursor == c) { mManagedCursors.remove(i); break; } } }
public void	takeKeyEvents(boolean get) Request that key events come to this activity. Use this if your activity has no views with focus, but the activity still wants a chance to process key events. see android.view.Window#takeKeyEvents getWindow().takeKeyEvents(get);
public void	unregisterForContextMenu(android.view.View view) Prevents a context menu to be shown for the given view. This method will remove the {@link OnCreateContextMenuListener} on the view. see #registerForContextMenu(View) param view The view that should stop showing a context menu. view.setOnCreateContextMenuListener(null);