Running a Android App while the screen is black - android

I'm trying to run a android app while the screen is black, i used a service and i tryed to add also a WakeLock of the type "PARTIAL_WAKE_LOCK".
The service play a song and save data from the accelerometer to the db, but when i press the red phone button to make the screen black, it play the song but it don't save data to the db. Have anyone a idea of why it don't save data to the db?
Tnk's
Valerio


With this you ensure that the code between acquire() and release() are executed even if the phone is in stanby mode, since the cpu will stay active.
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
..CPU will stay on during this section..
wl.release();

Related

turn on screen from service

I have Android 7 (API 24). I launch my app which launches started service. Then timeout causes screen to turn off. The service does something in background and eventually wants to turn the screen back on. How can I turn the screen on from service?
I already tried:
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "MyApp::MyWakelockTag");
wl.acquire();
The permission for WAKE_LOCK was set. I also wanted to use FULL_WAKE_LOCK flag, but this is deprecated. Anyway, this doesn't work.
I also tried to launch my activity from service and implement this in OnResume of my activity:
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
This also doesn't work (i.e. it doesn't turn the screen on).
Thank you for your help.

Android Device screen not turning off

I started songs on one of the music apps, on my android device.
Although I can see only partial wake_locks being acquired, still device display doesn't turn off even after screen timeout.
I wonder what is keeping the device screen on.
Can someone suggest where to look for probable cause.
Thanks!

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wakeLock = pm.newWakeLock(
pm.SCREEN_DIM_WAKE_LOCK, "My wakelook");
// This will make the screen and power stay on
// This will release the wakelook after 1000 ms
wakeLock.acquire(1000);
// Alternative you can request and / or release the wakelook via:
// wakeLock.acquire(); wakeLock.release();
I used this code and works fine to me.

android alarm manager sound after reboot

I'm working on a service-like application using android's AlarmManager. The app basically connects to a server and calls a remote procedure. If the value returned is True, it plays a sound:
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_RING);
try {
mediaPlayer.setDataSource(getApplicationContext(),
Uri.parse("file:///system/media/audio/ringtones/Rolling_tone.ogg"));
}
...
mediaPlayer.start();
This works all and well when the application is started manually. However when the phone is rebooted (I've implemented the BroadcastReceiver), the sound is played for like a second then gets interrupted immediately.
It sounds almost like the play cycle is being cut off by something. I need to stop and re-start the application to have it working correctly again.
Any clues on what the cause could be?

You could use MediaPlayer's setScreenOnWhilePlaying() to ensure that your application doesn't go to sleep while the audio plays in the background.
http://developer.android.com/reference/android/media/MediaPlayer.html#setWakeMode%28android.content.Context,%20int%29
Another possible solution is the use the PowerManager to keep your device awake with a WakeLock:
See http://developer.android.com/reference/android/os/PowerManager.html
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
wl.acquire();
... wait until sound has finished playing (with listener)
wl.release();

Android - Disable proximity sensor in my app

I'm working on an app that allows the user to start a phone call from the app itself and once the call was initiated, the user can get back to the app to do some UI actions.
My current problem is that once the call started the proximity sensor was enabled which makes it almost impossible to work with the app (depends on the sensitivity of the sensor - per device).
Is there anyway to control the sensor?
For example, I would like to disable the sensor once my activity is visible and re-enable it once invisible.
Thanks,
Lior.

Try to set WakeLock in your application code...like below....
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock( PowerManager.FULL_WAKE_LOCK, "FullWakeLock" );
Hope it will help you...

Android device sleeping issue

I have a little issue when I set option for device not sleeping. I'm connecting to web server and downloading data and when I'm doing this I need the device stay awake. I'm using this in this way :
1.In my Synchronization class when I start a connection to a web server I set this :
PowerManager powerMan = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = powerMan.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Tag");
wl.acquire();
and onDestroy() method in this activity I set :
wl.release();
But it seems that after this the device is not sleeping even if I close my application. Is there something that I'm doing wrong. Thanks in advance!

Try to use this instead of WakeLock Manager :
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
this will keep your screen on and you can remove that option by doing his :
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
This should help.

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