I created a service that is supposed to run in the background on a button press and stop on a button press. It's started from a fragment and not an Activity. I can get it to start and run while the screen is on, but the moment my screen turns off, its onDestroy method is called and stops itself. I haven't found a post that makes me realize what I am (most likely obviously) doing wrong.
I began giving it a partial wake lock, yet that doesn't do anything.
Manifest has permission
Code:
<uses-permission android:name="android.permission.WAKE_LOCK" />
Service gets started from fragment with boolean intent extra to specify if it should acquire wake lock
Java:
Intent intent = new Intent(mainActivity.getApplicationContext(), NetworkService.class);
intent.putExtra("Wake Lock", wakeLockBox.isEnabled());
mainActivity.startService(intent);
My Service creation acquires the wakelock with Partial tag and return redeliver intent.
Java:
private PowerManager mPowerManager;
private PowerManager.WakeLock wakeLock;
private boolean wakeLockSet;
// service doing its thing code here
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("Service", "Started");
wakeLockSet = intent.getBooleanExtra("Wake Lock", false);
// ...
setWakeLock();
// ...
return START_REDELIVER_INTENT;
}
private void setWakeLock()
{
mPowerManager = (PowerManager) getSystemService(getApplicationContext().POWER_SERVICE);
wakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
"NetworkService::WakelockTag");
wakeLock.acquire();
}
Based on what I have seen in previous posts and from testing, the only way for the wakelock to be released is when the Service is destroyed.
Java:
@Override
public void onDestroy()
{
super.onDestroy();
// ...
if (wakeLockSet) wakeLock.release();
Log.d("Service", "Shutdown");
stopSelf();
}
Whenever my screen turns off, the service onDestroy() method is called and the service releases the lock then stops itself. So I am confused about how the wakelock works with services that are supposed to run when the screen is off.
I even log when the service is started to track if intent was getting redelivered, and it's not.
I turned off my phones battery optimization and that didn't help. The only time I got it to run when the screen was off was when I just commented out onDestroy, which isn't gonna be a good solution.
Also I tried making it a foreground service.
in the fragment
Java:
// notification builder made earlier
Intent intent = new Intent(mainActivity.getApplicationContext(), NetworkService.class);
intent.putExtra("Notification", builder.build());
intent.putExtra("Wake Lock", wakeLockBox.isEnabled());
mainActivity.startForegroundService(intent);
then the service creation
Java:
private PowerManager mPowerManager;
private PowerManager.WakeLock wakeLock;
private boolean wakeLockSet;
// service doing its thing code here
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
startForeground(400, intent.getExtras().getParcelable("Notification"));
Log.d("Service", "Started");
wakeLockSet = intent.getBooleanExtra("Wake Lock", false);
// ...
setWakeLock();
// ...
return START_REDELIVER_INTENT;
}
private void setWakeLock()
{
mPowerManager = (PowerManager) getSystemService(getApplicationContext().POWER_SERVICE);
wakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
"NetworkService::WakelockTag");
wakeLock.acquire();
}
Same results though.
Any ideas of what I am doing wrong? The project's min SDK is 27.
