在 Android Q 的锁定屏幕上收到 fcm 通知后开始活动

Question

For my application, I need to realize behaviour like WhatsApp, show my application above the lock screen when a device is locked, and I did it successfully in android versions below Android Q. To do that I grant Settings.ACTION_MANAGE_OVERLAY_PERMISSION . Does anybody know how to do it without SYSTEM_ALERT_WINDOW permission ? For push notification I use fcm.

My code:

private void tryWakeUp() {
        try {

            String ns = getApplicationContext().getPackageName();
            String cls = ns + ".MainActivity";
            Intent intent = new Intent(getApplicationContext(), Class.forName(cls));
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            intent.setAction(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);
            intent.putExtra("foreground", true);
            intent.putExtra("incoming_call", true);

            PowerManager pm = (PowerManager) getApplicationContext()
                    .getSystemService(Context.POWER_SERVICE);

            PowerManager.WakeLock wl1 = pm.newWakeLock(
                    PowerManager.ACQUIRE_CAUSES_WAKEUP |
                            PowerManager.ON_AFTER_RELEASE |
                            PowerManager.FULL_WAKE_LOCK,
                    "wl1"
            );
            wl1.acquire(10000);

            Log.d(TAG, "try wake up");

            startActivity(intent);
        } catch (Exception e) {
            Log.w(TAG, "Failed to open application on message receive", e);
        }
    }

This code executes after I receive data push notification.

Answer 1

Use setVisiblity() from NotificationBuilder added in API level 21 Android 5.0):

notificationBuilder.setVisibility(Notification.VISIBILITY_PUBLIC);

public NotificationCompat.Builder setVisibility (int visibility) Sets Notification.visibility.

Parameters
visibility int : One of Notification.VISIBILITY_PRIVATE (the default), Notification.VISIBILITY_PUBLIC , or Notification.VISIBILITY_SECRET .

Answer 2

WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED has deprecated in Android Q. Instead you can use Activity.setShowWhenLocked(true) and Activity.setTurnScreenOn(true) in onCreate of Activity to show activity in lock screen.