Hi, You might also need a partial wake lock to keep cpu running when device goes to sleep. Check that you service restarts ok after it is killed & restarted by OS.
Regards On Apr 11, 2:43 am, Kristopher Micinski <[email protected]> wrote: > You can't run your app forever, it will get killed when memory is low, you > can't really avoid it (on a non rooted device): apps aren't meant to run and > consume resources forever. > > And I don't think that dumping a large amount of code at people is going to > help, unless you can pinpoint your problem a little bit and try to narrow > what you think is going wrong. Try instead thinking of what ways you can > change the structure of your application to make it work to the android > platform a little bit better. > > I understand that you want to have the app recording forever in the > background, but is this even practical? I'm not sure... I think at least > the phone will run out of power much more quickly... > > It's too bad uneducated bosses push these types of projects on people > without knowing what capabilities the platform has, though. > > Kris > > On Sat, Apr 9, 2011 at 9:47 AM, [email protected] < > > > > > > > > [email protected]> wrote: > > I'm creating an android application which act like a car blackbox, but > > i run into problem as soon i start doing it, maybe partly because i'm > > new to android/java but i've given 6more weeks to develop this > > app... :'( > > > But get back to my problem i had my service run the video recording > > processes in the background so i should be able to leave the app for a > > while and come back to the Video recording GUI with the surfaceview > > but my application was force to close when i return to the app. So is > > the problem related to onResume() method or something else? If its yes > > what i should do in order to get my application GUI to return to the > > video recording surfaceview and still running the background recording > > using the service rather than giving me an error? > > > Can someone please help me, i've really exhausted all ideas and to > > make it worse i'm new to java/android thus making me very headache, i > > really need some experience programmer to help me solve the > > problem... > > > public class CameraTest extends Activity implements > > SurfaceHolder.Callback { > > > private static final String TAG = "Exception"; > > > public static SurfaceView surfaceView; > > public static SurfaceHolder surfaceHolder; > > public static Camera MainCamera; > > public static boolean previewRunning; > > > @Override > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > setContentView(R.layout.main); > > > surfaceView = (SurfaceView)findViewById(R.id.surface_camera); > > surfaceHolder = surfaceView.getHolder(); > > surfaceHolder.addCallback(this); > > > surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); > > > Button btnStart = (Button) findViewById(R.id.button4); > > btnStart.setOnClickListener(new View.OnClickListener() > > { > > public void onClick(View v) > > { > > startService(new Intent(getApplicationContext(), > > ServiceRecording.class)); > > } > > }); > > > Button btnStop = (Button) findViewById(R.id.button5); > > btnStop.setOnClickListener(new View.OnClickListener() > > { > > public void onClick(View v) > > { > > stopService(new Intent(getApplicationContext(), > > ServiceRecording.class)); > > } > > }); > > } > > > @Override > > public void surfaceCreated(SurfaceHolder holder) { > > MainCamera = Camera.open(); > > if (MainCamera != null) { > > Camera.Parameters params = MainCamera.getParameters(); > > MainCamera.setParameters(params); > > } > > else { > > Toast.makeText(getApplicationContext(), "Camera not > > available!", > > Toast.LENGTH_LONG).show(); > > finish(); > > } > > } > > > @Override > > public void surfaceChanged(SurfaceHolder holder, int format, int > > width, int height) { > > if (previewRunning) { > > MainCamera.stopPreview(); > > } > > > Camera.Parameters p = MainCamera.getParameters(); > > p.setPreviewSize(320, 240); > > p.setPreviewFormat(PixelFormat.JPEG); > > MainCamera.setParameters(p); > > > try { > > MainCamera.setPreviewDisplay(holder); > > MainCamera.startPreview(); > > previewRunning = true; > > } > > catch (IOException e) { > > Log.e(TAG,e.getMessage()); > > e.printStackTrace(); > > } > > } > > > @Override > > public void onResume(){ > > super.onResume(); > > > } > > > @Override > > public void surfaceDestroyed(SurfaceHolder holder){ > > MainCamera.stopPreview(); > > previewRunning = false; > > MainCamera.release(); > > } > > } > > > My RecordingService.java Service file > > public class ServiceRecording extends Service { > > > @Override > > public IBinder onBind(Intent intent) { > > // TODO Auto-generated method stub > > return null; > > } > > > private SurfaceView surfaceView; > > private SurfaceHolder surfaceHolder; > > public static Camera ServiceCamera; > > private boolean RecordingStatus; > > private MediaRecorder mediaRecorder; > > private final int maxDurationInMs = 20000; > > > private static final String TAG = "Exception"; > > > @Override > > public void onCreate() { > > super.onCreate(); > > > RecordingStatus = false; > > ServiceCamera = CameraTest.MainCamera; > > surfaceView = CameraTest.surfaceView; > > surfaceHolder = CameraTest.surfaceHolder; > > } > > > @Override > > public int onStartCommand(Intent intent, int flags, int startId) { > > super.onStartCommand(intent, flags, startId); > > if (RecordingStatus == false) > > startRecording(); > > > return START_STICKY; > > } > > > @Override > > public void onDestroy() { > > super.onDestroy(); > > > stopRecording(); > > RecordingStatus = false; > > } > > > public boolean startRecording(){ > > try { > > Toast.makeText(getBaseContext(), "Recording > > Started", > > Toast.LENGTH_SHORT).show(); > > try{ > > ServiceCamera.unlock(); > > } > > catch(Exception e){ > > > ServiceCamera.reconnect(); > > } > > > mediaRecorder = new MediaRecorder(); > > > mediaRecorder.setCamera(ServiceCamera); > > > mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); > > > mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); > > > mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); > > > mediaRecorder.setMaxDuration(maxDurationInMs); > > > mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); > > > mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT); > > > // > > mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); > > DateFormat dateFormat = new > > SimpleDateFormat("yyyy-MM-dd > > HH_mm_ss"); > > Date date = new Date(); > > File directory = new > > File(Environment.getExternalStorageDirectory() + "/VideoList"); > > > if(!(directory.exists())) > > directory.mkdir(); > > > File FileSaved = new > > File(Environment.getExternalStorageDirectory() + "/VideoList", > > dateFormat.format(date) + ".3gp"); > > > mediaRecorder.setOutputFile(FileSaved.getPath()); > > > mediaRecorder.setVideoSize(surfaceView.getWidth(),surfaceView.getHeight()); > > > //mediaRecorder.setVideoFrameRate(videoFramesPerSecond); > > > mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface()); > > > mediaRecorder.prepare(); > > mediaRecorder.start(); > > > RecordingStatus = true; > > > return true; > > } > > > catch (IllegalStateException e) { > > Log.d(TAG,e.getMessage()); > > e.printStackTrace(); > > return false; > > } > > catch (IOException e) { > > Log.d(TAG,e.getMessage()); > > e.printStackTrace(); > > return false; > > } > > } > > > public void stopRecording() { > > Toast.makeText(getBaseContext(), "Recording Stopped", > > Toast.LENGTH_SHORT).show(); > > mediaRecorder.stop(); > > > try { > > ServiceCamera.reconnect(); > > } catch (IOException e) { > > e.printStackTrace(); > > } > > RecordingStatus = false; > > } > > } > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
