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. 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