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Hizmet başlatıldıktan sonra arka planda görüntü yakalayabilen bir android uygulaması oluşturmaya çalışıyorum. Onu yakalayabilir ve sdcard'a kaydedebilirim ancak yakalanan görüntü biraz karanlık ve ben sorunu takip edemiyorum. Olasılıklar neler olabilir?Android Camera in Arka Plan
Yakalanan Resim: Ben takePicture() önizleme başladıktan sonra kamera aydınlatma koşullarına uyum sağlamak için biraz gecikmeli gerektiğine inanıyoruz http://imgur.com/8onjW60
public class MyService extends Service {
Camera mCamera;
public String imageEncodeString,imageName;
public Bitmap bitmap;
public File file;
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
if (data != null) {
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
if (bitmap != null) {
imageName = String.valueOf(System.currentTimeMillis() + ".jpg");
File basedir = new File(Environment.getExternalStorageDirectory() + "/dirr");
file = new File(Environment.getExternalStorageDirectory() + "/dirr" + File.separator + imageName);
if (!basedir.isDirectory()) {
basedir.mkdirs();
}
try {
file.createNewFile();
FileOutputStream otstream = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG,100,otstream);
byte[] img =new byte[0];
otstream.write(img);
otstream.flush();
otstream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
mCamera.startPreview();
}
}
};
public MyService() {
}
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(MyService.this, "Starting Service...", Toast.LENGTH_SHORT).show();
Log.d("TAG", "======= service in onStartCommand");
if (checkCameraHardware(this)) {
mCamera = getCameraInstance();
if (mCamera != null) {
SurfaceView sv = new SurfaceView(this);
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(1, 1,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSPARENT);
params.alpha = 0;
SurfaceHolder sh = sv.getHolder();
sv.setZOrderOnTop(true);
sh.setFormat(PixelFormat.TRANSPARENT);
sh.addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
Camera.Parameters parameters = mCamera.getParameters();
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
parameters.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);
parameters.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
mCamera.setParameters(parameters);
Camera.Parameters p = mCamera.getParameters();
List<Camera.Size> listSize;
listSize = p.getSupportedPreviewSizes();
Camera.Size mPreviewSize = listSize.get(2);
Log.v("TAG", "preview width = " + mPreviewSize.width
+ " preview height = " + mPreviewSize.height);
p.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
listSize = p.getSupportedPictureSizes();
Camera.Size mPictureSize = listSize.get(2);
Log.v("TAG", "capture width = " + mPictureSize.width
+ " capture height = " + mPictureSize.height);
p.setPictureSize(mPictureSize.width, mPictureSize.height);
mCamera.setParameters(p);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
// mCamera.startPreview();
// mCamera.takePicture(null, null, mPictureCallback); // used to takePicture.
// Log.d("TAG", "========= Capturing Started");
// mCamera.stopPreview();
// mCamera.release();
// Log.d("TAG", "========== Capturing finished.");
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mCamera.release();
}
});
wm.addView(sv, params);
} else {
Log.d("TAG", "==== get Camera from service failed");
}
}else {
Log.d("TAG", "==== There is no camera hardware on device.");
}
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Log.d("TAG", "========= Capturing Started");
mCamera.startPreview();
mCamera.takePicture(null, null, mPictureCallback);
Vibrator vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
Log.d("TAG", "========== Capturing finished.");
}
}, 5000);
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
Toast.makeText(MyService.this, "Service Stopped...", Toast.LENGTH_SHORT).show();
}
public static boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
public static Camera getCameraInstance() {
Camera c = null;
try {
c = Camera.open();
} catch (Exception e) {
Log.d("TAG", "Open camera failed: " + e);
}
return c;
}
}