HandlerThread inside BroadcastReceiver

Question

Is it possible to use HandlerThread inside BroadcastReceiver's onReceive method which further starts a service on the main UI thread??

My aim is to use HandlerThread inside onReceive method ,so that the service gets started in the separate thread.

But don't know how to implement it.

Any hints ?

Thanks

EDIT : Service class

public class BackgroundVideoRecorder extends Service implements SurfaceHolder.Callback {

public  WindowManager windowManager;
public SurfaceView surfaceView;
public Camera camera = null;
public MediaRecorder mediaRecorder = null;


@Override
public IBinder onBind(Intent intent) {
    return null;
}



@Override
public void onCreate() {

    // Create new SurfaceView, set its size to 1x1, move it to the top left corner and set this service as a callback
    windowManager = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
    surfaceView = new SurfaceView(getApplicationContext());
    WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(
            1, 1,
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT
    );
    layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
    windowManager.addView(surfaceView, layoutParams);
    surfaceView.getHolder().addCallback(this);

}

// Method called right after Surface created (initializing and starting MediaRecorder)
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {

    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ContextCompat.checkSelfPermission(getApplicationContext(), CAMERA) == PackageManager.PERMISSION_GRANTED) {
                camera = Camera.open();
            }else{
                // should show permission
            }

        } else {
            camera = Camera.open();
        }
        mediaRecorder = new MediaRecorder();
        camera.unlock();

        mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
        mediaRecorder.setCamera(camera);
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_1080P));


        mediaRecorder.setOutputFile(
                Environment.getExternalStorageDirectory() + "/" +
                        DateFormat.format("yyyy-MM-dd_kk-mm-ss", new Date().getTime()) +
                        ".mp4"
        );

        try {
            mediaRecorder.prepare();
        } catch (Exception e) {
        }
        mediaRecorder.start();

    } catch (Exception e) {

    }


}

// Stop recording and remove SurfaceView
@Override
public void onDestroy() {

    mediaRecorder.stop();
    mediaRecorder.reset();
    mediaRecorder.release();

    camera.lock();
    camera.release();

    windowManager.removeView(surfaceView);

}


@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int width, int height) {
}

@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
}


}

I think I am not using services correctly . Please help.

EDIT2:Logcat

 08/11 18:00:20: Launching app
$ adb push     F:\AndroidStudioWorkspace\MyApplication2\app\build\outputs\apk\app-debug.apk    /data/local/tmp/com.example.jatin.myapplication2
$ adb shell pm install -r "/data/local/tmp/com.example.jatin.myapplication2"
     pkg: /data/local/tmp/com.example.jatin.myapplication2
Success


$ adb shell am start -n     "com.example.jatin.myapplication2/com.example.jatin.AgentSpy.MainActivity" -a    android.intent.action.MAIN -c android.intent.category.LAUNCHER
Client not ready yet..Waiting for process to come online
Connected to process 7445 on device xiaomi-mi_4i-a67ae459
D/###BVRREC###: true
I/MediaRecorderJNI: prepare: surface=0x5583ad0d30
I/Choreographer: Skipped 64 frames!  The application may be doing too much     work on its main thread.
D/###BVRREC###: false
V/RenderScript: Application requested CPU execution
V/RenderScript: 0x558342fa80 Launching thread(s), CPUs 8
D/###BVRREC###: true
I/MediaRecorderJNI: prepare: surface=0x5583b23330
I/Choreographer: Skipped 42 frames!  The application may be doing too much     work               on its main thread.
     D/###BVRREC###: false
    Application terminated.

Answer 1

You can use goAsync() method. https://developer.android.com/reference/android/content/BroadcastReceiver.html#

Answer 2

Refer to BroadcastReceiver, you can NOT use HandlerThread in onReceive method:

Receiver Lifecycle

anything that requires asynchronous operation is not available, because you will need to return from the function to handle the asynchronous operation, but at that point the BroadcastReceiver is no longer active and thus the system is free to kill its process before the asynchronous operation completes.

Process Lifecycle

...... This means that for longer-running operations you will often use a Service in conjunction with a BroadcastReceiver to keep the containing process active for the entire time of your operation.

SO PLEASE FOLLOW ANDROID API GUIDES: To run a longer-running operation when onReceive invoked, you should start a service, then create another thread in service.

Refer to Extending the Service class for sample code which create a HandlerThread and just sleep for 5 seconds when message received.