Камера Android: попытка вызвать виртуальный метод Параметры камеры Android в android.hardware.Camera.getParameters()' по ⇐ JAVA

[Anonymous]

Я использовал свой сервис Fabric и обнаружил эту ошибку на большинстве устройств, на которых работает мое приложение.

Ошибка была такая:


Неустрашимое исключение: java.lang.NullPointerException Попытка вызвать
виртуальный метод 'android.hardware.Camera$Parameters
android.hardware.Camera.getParameters()' по ссылке на пустой объект


Вот мой код:< /p>

public class CameraActivity extends Activity implements SurfaceHolder.Callback{

android.hardware.Camera camera;
int moi = 0;
@InjectView(R.id.s)
SurfaceView surfaceView;

@InjectView(R.id.takeaphoto)
ImageView imageView;
SurfaceHolder surfaceHolder;
private Camera.Face[] mFaces;

// Draw rectangles and other fancy stuff:
private FaceOverlayView mFaceView;
private int mOrientation;
private float x1,x2;
static final int MIN_DISTANCE = 150;
private int mOrientationCompensation;
private OrientationEventListener mOrientationEventListener;

// Let's keep track of the display rotation and orientation also:
private int mDisplayRotation;
private int mDisplayOrientation;

Camera.PictureCallback callback;
int cameraId = 0;
Camera.ShutterCallback shutterCallback;

private Camera.FaceDetectionListener faceDetectionListener = new Camera.FaceDetectionListener() {
@Override
public void onFaceDetection(Camera.Face[] faces, Camera camera) {
Log.d("onFaceDetection", "Number of Faces:" + faces.length);
// Update the view now!
mFaceView.setFaces(faces);
}

};

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
Fabric.with(this, new Crashlytics());
Fabric.with(this, new Answers());
setContentView(R.layout.camera_activity);

mFaceView = new FaceOverlayView(this);
addContentView(mFaceView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
// Create and Start the OrientationListener:
mOrientationEventListener = new SimpleOrientationEventListener(this);
mOrientationEventListener.enable();

SharedPreferences pap = this.getSharedPreferences(
"AD1", Context.MODE_PRIVATE);
boolean frr = pap.getBoolean("fr", false);

if (!frr) {

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Tip");
builder.setMessage("Use the beautiful filters by swiping from right to left")
.setCancelable(true)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {

SharedPreferences e = getApplicationContext().getSharedPreferences(
"AD1", Context.MODE_PRIVATE);
SharedPreferences.Editor d = e.edit();
d.putBoolean("fr", true);
d.commit();

}

});

AlertDialog alert = builder.create();
alert.show();

} else {

}

ButterKnife.inject(this);
surfaceHolder=surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
cameraImage();
}
});
callback = new android.hardware.Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] bytes, android.hardware.Camera camera) {
FileOutputStream outputStream=null;
File file_image = getDirc();

SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyymmddhhmms");
String date = simpleDateFormat.format(new Date());
String photo_file="PI_"+date+".jpg";
String file_name = file_image.getAbsolutePath()+"/"+photo_file;
File picfile=new File(file_name);

try {

outputStream=new FileOutputStream(picfile);
outputStream.write(bytes);
outputStream.close();

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

}
refreshCamera();
refreshGallery(picfile);

try {
camera.stopPreview();
}catch (Exception e){}

try{

camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
}catch (Exception e){}

}

};

}

private void refreshGallery(File file){
Intent intent=new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.fromFile(file));

}

public void refreshCamera(){

if (surfaceHolder.getSurface() == null){

return;

}

}

private class SimpleOrientationEventListener extends OrientationEventListener {

public SimpleOrientationEventListener(Context context) {
super(context, SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
public void onOrientationChanged(int i) {
// We keep the last known orientation. So if the user first orient
// the camera then point the camera to floor or sky, we still have
// the correct orientation.
if (orientation == ORIENTATION_UNKNOWN) return;
mOrientation = Util.roundOrientation(orientation, mOrientation);
// When the screen is unlocked, display rotation may change. Always
// calculate the up-to-date orientationCompensation.
int orientationCompensation = mOrientation
+ Util.getDisplayRotation(CameraActivity.this);
if (mOrientationCompensation != orientationCompensation) {
mOrientationCompensation = orientationCompensation;
mFaceView.setOrientation(mOrientationCompensation);
}
}

}

private File getDirc(){

File dics = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
return new File(dics ,"Camera");

}

public void cameraImage(){

camera.takePicture(null , null ,callback);
MediaPlayer mediaPlayer = MediaPlayer.create(this , R.raw.sound);
mediaPlayer.start();

}

public void surfaceCreated(SurfaceHolder surfaceHolder ) {

try {
camera = android.hardware.Camera.open();
}catch (RuntimeException ex){}
android.hardware.Camera.Parameters parameters;
parameters = camera.getParameters();
camera.setFaceDetectionListener(faceDetectionListener);
camera.startFaceDetection();
parameters.setPreviewFrameRate(20);
List customSizes = parameters.getSupportedPreviewSizes();
Camera.Size customSize = customSizes.get(0); //Added size
parameters.setPreviewSize(customSize.width, customSize.height);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
camera.setParameters(parameters);
camera.setDisplayOrientation(90);

try {

camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();

}catch (Exception e){

}

}

@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
refreshCamera();
setDisplayOrientation();

}

@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
camera.stopPreview();
camera.release();
camera=null;

}

public void frontCamera(View view) {

camera.stopPreview();
camera.release();
camera=null;

if (cameraId == 0){

try {
camera = android.hardware.Camera.open(1);
}catch (RuntimeException ex){}
android.hardware.Camera.Parameters parameters;
camera.setFaceDetectionListener(faceDetectionListener);
camera.startFaceDetection();
parameters = camera.getParameters();
parameters.setPreviewFrameRate(20);
List customSizes = parameters.getSupportedPreviewSizes();

Camera.Size customSize = customSizes.get(0); //Added size
parameters.setPreviewSize(customSize.width, customSize.height);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
camera.setParameters(parameters);
camera.setDisplayOrientation(90);

cameraId = 1;

try {

camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();

}catch (Exception e){

}
}

else{

try {
camera = android.hardware.Camera.open();
}catch (RuntimeException ex){}
android.hardware.Camera.Parameters parameters;
camera.setFaceDetectionListener(faceDetectionListener);
camera.startFaceDetection();
parameters = camera.getParameters();
parameters.setPreviewFrameRate(20);
List customSizes = parameters.getSupportedPreviewSizes();

Camera.Size customSize = customSizes.get(0); //Added size
parameters.setPreviewSize(customSize.width, customSize.height);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
camera.setParameters(parameters);
camera.setDisplayOrientation(90);

cameraId = 0;

try {

camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();

}catch (Exception e){

}

}
}

private void setDisplayOrientation() {
// Now set the display orientation:
mDisplayRotation = Util.getDisplayRotation(CameraActivity.this);
mDisplayOrientation = Util.getDisplayOrientation(mDisplayRotation, 0);

camera.setDisplayOrientation(mDisplayOrientation);

if (mFaceView != null) {
mFaceView.setDisplayOrientation(mDisplayOrientation);
}
}


Вот мой манифест:

























Подробнее здесь: https://stackoverflow.com/questions/410 ... ters-on-an