/*
* Copyright (C) 2007 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.app;
import android.app.trust.ITrustManager;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.RemoteException;
import android.os.IBinder;
import android.os.ServiceManager;
import android.os.UserHandle;
import android.view.IWindowManager;
import android.view.IOnKeyguardExitResult;
import android.view.WindowManagerGlobal;
/**
* Class that can be used to lock and unlock the keyboard. Get an instance of this
* class by calling {@link android.content.Context#getSystemService(java.lang.String)}
* with argument {@link android.content.Context#KEYGUARD_SERVICE}. The
* actual class to control the keyboard locking is
* {@link android.app.KeyguardManager.KeyguardLock}.
*/
public class KeyguardManager {
private IWindowManager mWM;
private ITrustManager mTrustManager;
/**
* Intent used to prompt user for device credentials.
* @hide
*/
public static final String ACTION_CONFIRM_DEVICE_CREDENTIAL =
"android.app.action.CONFIRM_DEVICE_CREDENTIAL";
/**
* A CharSequence dialog title to show to the user when used with a
* {@link #ACTION_CONFIRM_DEVICE_CREDENTIAL}.
* @hide
*/
public static final String EXTRA_TITLE = "android.app.extra.TITLE";
/**
* A CharSequence description to show to the user when used with
* {@link #ACTION_CONFIRM_DEVICE_CREDENTIAL}.
* @hide
*/
public static final String EXTRA_DESCRIPTION = "android.app.extra.DESCRIPTION";
/**
* Get an intent to prompt the user to confirm credentials (pin, pattern or password)
* for the current user of the device. The caller is expected to launch this activity using
* {@link android.app.Activity#startActivityForResult(Intent, int)} and check for
* {@link android.app.Activity#RESULT_OK} if the user successfully completes the challenge.
*
* @return the intent for launching the activity or null if no password is required.
**/
public Intent createConfirmDeviceCredentialIntent(CharSequence title, CharSequence description) {
if (!isKeyguardSecure()) return null;
Intent intent = new Intent(ACTION_CONFIRM_DEVICE_CREDENTIAL);
intent.putExtra(EXTRA_TITLE, title);
intent.putExtra(EXTRA_DESCRIPTION, description);
// For security reasons, only allow this to come from system settings.
intent.setPackage("com.android.settings");
return intent;
}
/**
* @deprecated Use {@link android.view.WindowManager.LayoutParams#FLAG_DISMISS_KEYGUARD}
* and/or {@link android.view.WindowManager.LayoutParams#FLAG_SHOW_WHEN_LOCKED}
* instead; this allows you to seamlessly hide the keyguard as your application
* moves in and out of the foreground and does not require that any special
* permissions be requested.
*
* Handle returned by {@link KeyguardManager#newKeyguardLock} that allows
* you to disable / reenable the keyguard.
*/
public class KeyguardLock {
private final IBinder mToken = new Binder();
private final String mTag;
KeyguardLock(String tag) {
mTag = tag;
}
/**
* Disable the keyguard from showing. If the keyguard is currently
* showing, hide it. The keyguard will be prevented from showing again
* until {@link #reenableKeyguard()} is called.
*
* A good place to call this is from {@link android.app.Activity#onResume()}
*
* Note: This call has no effect while any {@link android.app.admin.DevicePolicyManager}
* is enabled that requires a password.
*
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#DISABLE_KEYGUARD}.
*
* @see #reenableKeyguard()
*/
public void disableKeyguard() {
try {
mWM.disableKeyguard(mToken, mTag);
} catch (RemoteException ex) {
}
}
/**
* Reenable the keyguard. The keyguard will reappear if the previous
* call to {@link #disableKeyguard()} caused it to be hidden.
*
* A good place to call this is from {@link android.app.Activity#onPause()}
*
* Note: This call has no effect while any {@link android.app.admin.DevicePolicyManager}
* is enabled that requires a password.
*
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#DISABLE_KEYGUARD}.
*
* @see #disableKeyguard()
*/
public void reenableKeyguard() {
try {
mWM.reenableKeyguard(mToken);
} catch (RemoteException ex) {
}
}
}
/**
* Callback passed to {@link KeyguardManager#exitKeyguardSecurely} to notify
* caller of result.
*/
public interface OnKeyguardExitResult {
/**
* @param success True if the user was able to authenticate, false if
* not.
*/
void onKeyguardExitResult(boolean success);
}
KeyguardManager() {
mWM = WindowManagerGlobal.getWindowManagerService();
mTrustManager = ITrustManager.Stub.asInterface(
ServiceManager.getService(Context.TRUST_SERVICE));
}
/**
* @deprecated Use {@link android.view.WindowManager.LayoutParams#FLAG_DISMISS_KEYGUARD}
* and/or {@link android.view.WindowManager.LayoutParams#FLAG_SHOW_WHEN_LOCKED}
* instead; this allows you to seamlessly hide the keyguard as your application
* moves in and out of the foreground and does not require that any special
* permissions be requested.
*
* Enables you to lock or unlock the keyboard. Get an instance of this class by
* calling {@link android.content.Context#getSystemService(java.lang.String) Context.getSystemService()}.
* This class is wrapped by {@link android.app.KeyguardManager KeyguardManager}.
* @param tag A tag that informally identifies who you are (for debugging who
* is disabling he keyguard).
*
* @return A {@link KeyguardLock} handle to use to disable and reenable the
* keyguard.
*/
@Deprecated
public KeyguardLock newKeyguardLock(String tag) {
return new KeyguardLock(tag);
}
/**
* Return whether the keyguard is currently locked.
*
* @return true if keyguard is locked.
*/
public boolean isKeyguardLocked() {
try {
return mWM.isKeyguardLocked();
} catch (RemoteException ex) {
return false;
}
}
/**
* Return whether the keyguard requires a password to unlock.
*
* @return true if keyguard is secure.
*/
public boolean isKeyguardSecure() {
try {
return mWM.isKeyguardSecure();
} catch (RemoteException ex) {
return false;
}
}
/**
* If keyguard screen is showing or in restricted key input mode (i.e. in
* keyguard password emergency screen). When in such mode, certain keys,
* such as the Home key and the right soft keys, don't work.
*
* @return true if in keyguard restricted input mode.
*
* @see android.view.WindowManagerPolicy#inKeyguardRestrictedKeyInputMode
*/
public boolean inKeyguardRestrictedInputMode() {
try {
return mWM.inKeyguardRestrictedInputMode();
} catch (RemoteException ex) {
return false;
}
}
/**
* Returns whether the device is currently locked and requires a PIN, pattern or
* password to unlock.
*
* @return true if unlocking the device currently requires a PIN, pattern or
* password.
*/
public boolean isDeviceLocked() {
return isDeviceLocked(UserHandle.getCallingUserId());
}
/**
* Returns whether the device is currently locked and requires a PIN, pattern or
* password to unlock.
*
* @param userId the user for which the locked state should be reported.
* @return true if unlocking the device currently requires a PIN, pattern or
* password.
* @hide
*/
public boolean isDeviceLocked(int userId) {
try {
return mTrustManager.isDeviceLocked(userId);
} catch (RemoteException e) {
return false;
}
}
/**
* @deprecated Use {@link android.view.WindowManager.LayoutParams#FLAG_DISMISS_KEYGUARD}
* and/or {@link android.view.WindowManager.LayoutParams#FLAG_SHOW_WHEN_LOCKED}
* instead; this allows you to seamlessly hide the keyguard as your application
* moves in and out of the foreground and does not require that any special
* permissions be requested.
*
* Exit the keyguard securely. The use case for this api is that, after
* disabling the keyguard, your app, which was granted permission to
* disable the keyguard and show a limited amount of information deemed
* safe without the user getting past the keyguard, needs to navigate to
* something that is not safe to view without getting past the keyguard.
*
* This will, if the keyguard is secure, bring up the unlock screen of
* the keyguard.
*
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#DISABLE_KEYGUARD}.
*
* @param callback Let's you know whether the operation was succesful and
* it is safe to launch anything that would normally be considered safe
* once the user has gotten past the keyguard.
*/
@Deprecated
public void exitKeyguardSecurely(final OnKeyguardExitResult callback) {
try {
mWM.exitKeyguardSecurely(new IOnKeyguardExitResult.Stub() {
public void onKeyguardExitResult(boolean success) throws RemoteException {
if (callback != null) {
callback.onKeyguardExitResult(success);
}
}
});
} catch (RemoteException e) {
}
}
}
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