Невозможно подключиться к службе камеры иногда

Question

Я вызываю функцию камеры как отдельный фрагмент во время первых 2-х раз вызова камеры класса, но если вы вызываете приложение третьего раза, приложение разбивается.

private int findFrontFacingCamera() { 
    int cameraId = 0; 
    // Search for the front facing camera 
    int numberOfCameras = Camera.getNumberOfCameras(); 
    for (int i = 0; i < numberOfCameras; i++) { 
     CameraInfo info = new CameraInfo(); 
     Camera.getCameraInfo(i, info); 
     if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 
      cameraId = i; 
      cameraFront = true; 
      break; 
     } 
    } 
    return cameraId; 
} 

private int findBackFacingCamera() { 
    int cameraId = -1; 
    //Search for the back facing camera 
    //get the number of cameras 
    int numberOfCameras = Camera.getNumberOfCameras(); 
    //for every camera check 
    for (int i = 0; i < numberOfCameras; i++) { 
     CameraInfo info = new CameraInfo(); 
     Camera.getCameraInfo(i, info); 
     if (info.facing == CameraInfo.CAMERA_FACING_BACK) { 
      cameraId = i; 
      cameraFront = false; 
      break; 
     } 
    } 
    return cameraId; 
} 

public void onResume() { 
    super.onResume(); 
    if (!hasCamera(myContext)) { 
     Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG); 
     toast.show(); 
     finish(); 
    } 
    if (mCamera == null) { 
     //if the front facing camera does not exist 
     if (findFrontFacingCamera() < 0) { 
      Toast.makeText(getActivity().getApplicationContext(), "No front facing camera found.", Toast.LENGTH_LONG).show(); 
      switchCamera.setVisibility(View.GONE); 
     } 
     mCamera = Camera.open(findFrontFacingCamera()); 
     mPicture = getPictureCallback(); 

     mPreview.refreshCamera(mCamera); 
    } 
} 

LogCat

01-19 10:56:15.164 11477-11477/com.example.siva.prep E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.example.siva.prep, PID: 11477 
    java.lang.RuntimeException: Fail to connect to camera service 
      at android.hardware.Camera.native_setup(Native Method) 
      at android.hardware.Camera.<init>(Camera.java:393) 
      at android.hardware.Camera.open(Camera.java:347) 
      at com.example.siva.prep.Selfie.onResume(Selfie.java:146) 

Это показывает ошибку на следующей строке в "onResume()" метод:

mCamera = Camera.open(findFrontFacingCamera()); 

Вот полный мой код я использую:

public class Selfie extends Fragment implements OnClickListener { 
private Camera mCamera; 
private CameraPreview mPreview; 
private PictureCallback mPicture; 
private Button capture, switchCamera; 
private Context myContext; 
private LinearLayout cameraPreview; 
private boolean cameraFront = false; 
Bitmap bmp; 
ImageView iv; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.fragment_selfie, container, false); 
// getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 
    iv=(ImageView) view.findViewById(R.id.image); 
    myContext = getActivity().getApplicationContext(); 

    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 

    cameraPreview = (LinearLayout) view.findViewById(R.id.camera_preview); 
    mPreview = new CameraPreview(myContext, mCamera); 
    cameraPreview.addView(mPreview); 

    ImageView capture = (ImageView) view.findViewById(R.id.button_capture); 
    capture.setOnClickListener(captrureListener); 

    ImageView switchCamera = (ImageView) view.findViewById(R.id.button_ChangeCamera); 
    switchCamera.setOnClickListener(switchCameraListener); 

    ImageView button1 = (ImageView) view.findViewById(R.id.back); 
    button1.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      FreeFragment fragment2 = new FreeFragment(); 
      FragmentManager fragmentManager = getFragmentManager(); 
      android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
      fragmentTransaction.replace(R.id.container, fragment2); 
      fragmentTransaction.commit(); 
     } 
    }); 
    getSupportActionBar().hide(); 
    return view; 
} 



private ActionBar getSupportActionBar() { 
    return ((AppCompatActivity) getActivity()).getSupportActionBar(); 
} 

@Override 
public void onClick(View v) { 
} 

private int findFrontFacingCamera() { 
    int cameraId = 0; 
    // Search for the front facing camera 
    int numberOfCameras = Camera.getNumberOfCameras(); 
    for (int i = 0; i < numberOfCameras; i++) { 
     CameraInfo info = new CameraInfo(); 
     Camera.getCameraInfo(i, info); 
     if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 
      cameraId = i; 
      cameraFront = true; 
      break; 
     } 
    } 
    return cameraId; 
} 

private int findBackFacingCamera() { 
    int cameraId = -1; 
    //Search for the back facing camera 
    //get the number of cameras 
    int numberOfCameras = Camera.getNumberOfCameras(); 
    //for every camera check 
    for (int i = 0; i < numberOfCameras; i++) { 
     CameraInfo info = new CameraInfo(); 
     Camera.getCameraInfo(i, info); 
     if (info.facing == CameraInfo.CAMERA_FACING_BACK) { 
      cameraId = i; 
      cameraFront = false; 
      break; 
     } 
    } 
    return cameraId; 
} 

public void onResume() { 
    super.onResume(); 
    if (!hasCamera(myContext)) { 
     Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG); 
     toast.show(); 
     finish(); 
    } 
    if (mCamera == null) { 
     //if the front facing camera does not exist 
     if (findFrontFacingCamera() < 0) { 
      Toast.makeText(getActivity().getApplicationContext(), "No front facing camera found.", Toast.LENGTH_LONG).show(); 
      switchCamera.setVisibility(View.GONE); 
     } 
     mCamera = Camera.open(findFrontFacingCamera()); 
     mPicture = getPictureCallback(); 

     mPreview.refreshCamera(mCamera); 
    } 
} 

private void finish() { 
} 

OnClickListener switchCameraListener = new OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     //get the number of cameras 
     int camerasNumber = Camera.getNumberOfCameras(); 
     if (camerasNumber >= 1) { 
      //release the old camera instance 
      //switch camera, from the front and the back and vice versa 

      releaseCamera(); 
      chooseCamera(); 
     } else { 
      Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG); 
      toast.show(); 
     } 
    } 
}; 

public void chooseCamera() { 
    // if the camera preview is the front 
    if (cameraFront) { 
     int cameraId = findBackFacingCamera(); 
     if (cameraId <= 0) { 
      //open the backFacingCamera 
      //set a picture callback 
      //refresh the preview 

      mCamera = Camera.open(cameraId); 
      mPicture = getPictureCallback(); 
      mPreview.refreshCamera(mCamera); 
     } 
    } else 
    { 
     int cameraId = findFrontFacingCamera(); 
     if (cameraId >= 0) { 
      //open the backFacingCamera 
      //set a picture callback 
      //refresh the preview 

      mCamera = Camera.open(cameraId); 
      mPicture = getPictureCallback(); 
      mPreview.refreshCamera(mCamera); 
     } 
    } 
} 

@Override 
public void onPause() { 
    super.onPause(); 
    //when on Pause, release camera in order to be used from other applications 
    releaseCamera(); 
} 

private boolean hasCamera(Context context) { 
    //check if the device has camera 
    if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) { 
     return true; 
    } else { 
     return false; 
    } 
} 

private PictureCallback getPictureCallback() { 
    PictureCallback picture = new PictureCallback() { 

     @Override 
     public void onPictureTaken(byte[] data, Camera camera) { 
      //make a new picture file 
      File pictureFile = getOutputMediaFile(); 



      if (pictureFile == null) { 
       return; 
      } 
      try { 
       //write the file 
       FileOutputStream fos = new FileOutputStream(pictureFile); 
       fos.write(data); 
       fos.close(); 
       Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG); 
       iv.setImageURI(Uri.fromFile(pictureFile)); 

       //Intent intent = new Intent(AndroidCameraExample.this,Fina.class); 
       String stringUri; 
       stringUri = pictureFile.toString(); 
       //intent.putExtra("imagePath", stringUri); 
       //startActivity(intent); 

       FreeFragment ldf = new FreeFragment(); 
       Bundle args = new Bundle(); 
       args.putString("Image", stringUri); 
       ldf.setArguments(args); 
       Log.d("Passing image", String.valueOf(args)); 
       getFragmentManager().beginTransaction().add(R.id.container, ldf).commit(); 

       toast.show(); 

      } catch (FileNotFoundException e) { 
      } catch (IOException e) { 
      } 

      //refresh camera to continue preview 
      mPreview.refreshCamera(mCamera); 
     } 
    }; 
    return picture; 
} 


//make picture and save to a folder 
public static File getOutputMediaFile() { 
    //make a new file directory inside the "sdcard" folder 
    File mediaStorageDir = new File("/sdcard/", "JCG Camera"); 

    //if this "JCGCamera folder does not exist 
    if (!mediaStorageDir.exists()) { 
     //if you cannot make this folder return 
     if (!mediaStorageDir.mkdirs()) { 
      return null; 
     } 
    } 

    //take the current timeStamp 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    File mediaFile; 
    //and make a media file: 
    mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); 


    return mediaFile; 
} 

OnClickListener captrureListener = new OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     mCamera.takePicture(null, null, mPicture); 
    } 
}; 

private void releaseCamera() { 
    // stop and release camera 
    if (mCamera != null) { 
     mCamera.release(); 
     mCamera = null; 
    } 
} 

} 

Answer 1

Независимо от причины, не получая ручку камеры, это случай, который необходимо обрабатывать с правильной обработкой ошибок. В текущем случае в вашем обработчике Pause выдается экземпляр камеры? Проверьте правильность использования на http://developer.android.com/training/basics/activity-lifecycle/pausing.html