How To Show Activity On Lock Screen When Password Is Set In Android
I am trying to show an activity when the screen is locked. I am running a service in the background, when an event occurs, I want to open an activity even if the app is locked(Similar to alarm app, which wakes up the screen and displays its activity). I have followed the following steps,
When OnReceive() is called, I want to open the activity on the lock screen.
public void OnReceive() {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "myalarmapp:alarm.");
wl.acquire(5000);
Intent startAlarmActivity = new Intent(MainScreen.this, AcceptScreen.class);
startActivity(startAlarmActivity);
wl.release();
}
Added below code in the activity's onCreate method which I want to show,
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
setShowWhenLocked(true);
setTurnScreenOn(true);
KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
keyguardManager.requestDismissKeyguard(this, null);
}
else {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
Added this in manifest for the activity which I want to show,
<activity
android:name=".v2.ui.orderaccept.AcceptScreen"
android:exported="true"
android:label="@string/title_activity_accept_screen"
android:theme="@style/AppTheme.NoActionBar"
android:showOnLockScreen="true"
android:screenOrientation="sensorPortrait"/>
It is working as expected when the phone does not have a lock screen password. But it does not work when there is a password for the lock screen.
Solution 1:
Finally, I got the solution.
add below code in the activity's onCreate method which you want to show on the lock screen,
final Window win = getWindow();
win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
| WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON);
Manifest,
<activity
android:name=".v2.ui.orderaccept.AcceptScreen"
android:exported="true"
android:label="@string/title_activity_accept_screen"
android:theme="@style/AppTheme.NoActionBar"
android:launchMode="singleInstance"/>
Call the activity,
val intent = Intent(context, targetclass)
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
startActivity(intent)