/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.appwidget;
import android.content.ComponentName;
import android.content.Context;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.Log;
import android.widget.RemoteViews;
import com.android.internal.appwidget.IAppWidgetService;
import java.lang.ref.WeakReference;
import java.util.List;
import java.util.WeakHashMap;
/**
* Updates AppWidget state; gets information about installed AppWidget providers and other
* AppWidget related state.
*/
public class AppWidgetManager {
static final String TAG = "AppWidgetManager";
/**
* Send this from your {@link AppWidgetHost} activity when you want to pick an AppWidget to display.
* The AppWidget picker activity will be launched.
* <p>
* You must supply the following extras:
* <table>
* <tr>
* <td>{@link #EXTRA_APPWIDGET_ID}</td>
* <td>A newly allocated appWidgetId, which will be bound to the AppWidget provider
* once the user has selected one.</td>
* </tr>
* </table>
*
* <p>
* The system will respond with an onActivityResult call with the following extras in
* the intent:
* <table>
* <tr>
* <td>{@link #EXTRA_APPWIDGET_ID}</td>
* <td>The appWidgetId that you supplied in the original intent.</td>
* </tr>
* </table>
* <p>
* When you receive the result from the AppWidget pick activity, if the resultCode is
* {@link android.app.Activity#RESULT_OK}, an AppWidget has been selected. You should then
* check the AppWidgetProviderInfo for the returned AppWidget, and if it has one, launch its configuration
* activity. If {@link android.app.Activity#RESULT_CANCELED} is returned, you should delete
* the appWidgetId.
*
* @see #ACTION_APPWIDGET_CONFIGURE
*/
public static final String ACTION_APPWIDGET_PICK = "android.appwidget.action.APPWIDGET_PICK";
/**
* Sent when it is time to configure your AppWidget while it is being added to a host.
* This action is not sent as a broadcast to the AppWidget provider, but as a startActivity
* to the activity specified in the {@link AppWidgetProviderInfo AppWidgetProviderInfo meta-data}.
*
* <p>
* The intent will contain the following extras:
* <table>
* <tr>
* <td>{@link #EXTRA_APPWIDGET_ID}</td>
* <td>The appWidgetId to configure.</td>
* </tr>
* </table>
*
* <p>If you return {@link android.app.Activity#RESULT_OK} using
* {@link android.app.Activity#setResult Activity.setResult()}, the AppWidget will be added,
* and you will receive an {@link #ACTION_APPWIDGET_UPDATE} broadcast for this AppWidget.
* If you return {@link android.app.Activity#RESULT_CANCELED}, the host will cancel the add
* and not display this AppWidget, and you will receive a {@link #ACTION_APPWIDGET_DELETED} broadcast.
*/
public static final String ACTION_APPWIDGET_CONFIGURE = "android.appwidget.action.APPWIDGET_CONFIGURE";
/**
* An intent extra that contains one appWidgetId.
* <p>
* The value will be an int that can be retrieved like this:
* {@sample frameworks/base/tests/appwidgets/AppWidgetHostTest/src/com/android/tests/appwidgethost/AppWidgetHostActivity.java getExtra_EXTRA_APPWIDGET_ID}
*/
public static final String EXTRA_APPWIDGET_ID = "appWidgetId";
/**
* An intent extra that contains multiple appWidgetIds.
* <p>
* The value will be an int array that can be retrieved like this:
* {@sample frameworks/base/tests/appwidgets/AppWidgetHostTest/src/com/android/tests/appwidgethost/TestAppWidgetProvider.java getExtra_EXTRA_APPWIDGET_IDS}
*/
public static final String EXTRA_APPWIDGET_IDS = "appWidgetIds";
/**
* An intent extra to pass to the AppWidget picker containing a {@link java.util.List} of
* {@link AppWidgetProviderInfo} objects to mix in to the list of AppWidgets that are
* installed. (This is how the launcher shows the search widget).
*/
public static final String EXTRA_CUSTOM_INFO = "customInfo";
/**
* An intent extra to pass to the AppWidget picker containing a {@link java.util.List} of
* {@link android.os.Bundle} objects to mix in to the list of AppWidgets that are
* installed. It will be added to the extras object on the {@link android.content.Intent}
* that is returned from the picker activity.
*
* {@more}
*/
public static final String EXTRA_CUSTOM_EXTRAS = "customExtras";
/**
* A sentiel value that the AppWidget manager will never return as a appWidgetId.
*/
public static final int INVALID_APPWIDGET_ID = 0;
/**
* Sent when it is time to update your AppWidget.
*
* <p>This may be sent in response to a new instance for this AppWidget provider having
* been instantiated, the requested {@link AppWidgetProviderInfo#updatePeriodMillis update interval}
* having lapsed, or the system booting.
*
* <p>
* The intent will contain the following extras:
* <table>
* <tr>
* <td>{@link #EXTRA_APPWIDGET_IDS}</td>
* <td>The appWidgetIds to update. This may be all of the AppWidgets created for this
* provider, or just a subset. The system tries to send updates for as few AppWidget
* instances as possible.</td>
* </tr>
* </table>
*
* @see AppWidgetProvider#onUpdate AppWidgetProvider.onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
*/
public static final String ACTION_APPWIDGET_UPDATE = "android.appwidget.action.APPWIDGET_UPDATE";
/**
* Sent when an instance of an AppWidget is deleted from its host.
*
* @see AppWidgetProvider#onDeleted AppWidgetProvider.onDeleted(Context context, int[] appWidgetIds)
*/
public static final String ACTION_APPWIDGET_DELETED = "android.appwidget.action.APPWIDGET_DELETED";
/**
* Sent when an instance of an AppWidget is removed from the last host.
*
* @see AppWidgetProvider#onEnabled AppWidgetProvider.onEnabled(Context context)
*/
public static final String ACTION_APPWIDGET_DISABLED = "android.appwidget.action.APPWIDGET_DISABLED";
/**
* Sent when an instance of an AppWidget is added to a host for the first time.
* This broadcast is sent at boot time if there is a AppWidgetHost installed with
* an instance for this provider.
*
* @see AppWidgetProvider#onEnabled AppWidgetProvider.onEnabled(Context context)
*/
public static final String ACTION_APPWIDGET_ENABLED = "android.appwidget.action.APPWIDGET_ENABLED";
/**
* Field for the manifest meta-data tag.
*
* @see AppWidgetProviderInfo
*/
public static final String META_DATA_APPWIDGET_PROVIDER = "android.appwidget.provider";
static WeakHashMap<Context, WeakReference<AppWidgetManager>> sManagerCache = new WeakHashMap();
static IAppWidgetService sService;
Context mContext;
/**
* Get the AppWidgetManager instance to use for the supplied {@link android.content.Context
* Context} object.
*/
public static AppWidgetManager getInstance(Context context) {
synchronized (sManagerCache) {
if (sService == null) {
IBinder b = ServiceManager.getService(Context.APPWIDGET_SERVICE);
sService = IAppWidgetService.Stub.asInterface(b);
}
WeakReference<AppWidgetManager> ref = sManagerCache.get(context);
AppWidgetManager result = null;
if (ref != null) {
result = ref.get();
}
if (result == null) {
result = new AppWidgetManager(context);
sManagerCache.put(context, new WeakReference(result));
}
return result;
}
}
private AppWidgetManager(Context context) {
mContext = context;
}
/**
* Set the RemoteViews to use for the specified appWidgetIds.
*
* <p>
* It is okay to call this method both inside an {@link #ACTION_APPWIDGET_UPDATE} broadcast,
* and outside of the handler.
* This method will only work when called from the uid that owns the AppWidget provider.
*
* @param appWidgetIds The AppWidget instances for which to set the RemoteViews.
* @param views The RemoteViews object to show.
*/
public void updateAppWidget(int[] appWidgetIds, RemoteViews views) {
try {
sService.updateAppWidgetIds(appWidgetIds, views);
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
/**
* Set the RemoteViews to use for the specified appWidgetId.
*
* <p>
* It is okay to call this method both inside an {@link #ACTION_APPWIDGET_UPDATE} broadcast,
* and outside of the handler.
* This method will only work when called from the uid that owns the AppWidget provider.
*
* @param appWidgetId The AppWidget instance for which to set the RemoteViews.
* @param views The RemoteViews object to show.
*/
public void updateAppWidget(int appWidgetId, RemoteViews views) {
updateAppWidget(new int[] { appWidgetId }, views);
}
/**
* Set the RemoteViews to use for all AppWidget instances for the supplied AppWidget provider.
*
* <p>
* It is okay to call this method both inside an {@link #ACTION_APPWIDGET_UPDATE} broadcast,
* and outside of the handler.
* This method will only work when called from the uid that owns the AppWidget provider.
*
* @param provider The {@link ComponentName} for the {@link
* android.content.BroadcastReceiver BroadcastReceiver} provider
* for your AppWidget.
* @param views The RemoteViews object to show.
*/
public void updateAppWidget(ComponentName provider, RemoteViews views) {
try {
sService.updateAppWidgetProvider(provider, views);
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
/**
* Return a list of the AppWidget providers that are currently installed.
*/
public List<AppWidgetProviderInfo> getInstalledProviders() {
try {
return sService.getInstalledProviders();
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
/**
* Get the available info about the AppWidget.
*
* @return A appWidgetId. If the appWidgetId has not been bound to a provider yet, or
* you don't have access to that appWidgetId, null is returned.
*/
public AppWidgetProviderInfo getAppWidgetInfo(int appWidgetId) {
try {
return sService.getAppWidgetInfo(appWidgetId);
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
/**
* Set the component for a given appWidgetId.
*
* <p class="note">You need the APPWIDGET_LIST permission. This method is to be used by the
* AppWidget picker.
*
* @param appWidgetId The AppWidget instance for which to set the RemoteViews.
* @param provider The {@link android.content.BroadcastReceiver} that will be the AppWidget
* provider for this AppWidget.
*/
public void bindAppWidgetId(int appWidgetId, ComponentName provider) {
try {
sService.bindAppWidgetId(appWidgetId, provider);
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
/**
* Get the list of appWidgetIds that have been bound to the given AppWidget
* provider.
*
* @param provider The {@link android.content.BroadcastReceiver} that is the
* AppWidget provider to find appWidgetIds for.
*/
public int[] getAppWidgetIds(ComponentName provider) {
try {
return sService.getAppWidgetIds(provider);
}
catch (RemoteException e) {
throw new RuntimeException("system server dead?", e);
}
}
}
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