Android benutzerdefinierte Kamera Problem in einigen Geräten

Question

Hallo, ich habe eine benutzerdefinierte Kamera, wo ich Klick-Taste haben, wenn angeklickt es das Bild erfasst ... Alles ist in Ordnung, aber in einigen Geräten ist die Vorschau dehnen und auch die Vorschau ist die Hälfte überlagert der Bildschirm und flackern ... etwas seltsame Wirkung. Wie behebe ich das?

Dies ist mein Code:

Kamera Aktivität:

preview = new Preview(this, (SurfaceView) findViewById(R.id.surfaceView)); 

preview.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); 

((FrameLayout) findViewById(R.id.preview)).addView(preview); 

preview.setKeepScreenOn(true); 

buttonClick = (Button) findViewById(R.id.buttonClick); 

buttonClick.setOnClickListener(new OnClickListener() { 
    public void onClick(View v) { 
     // preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
     camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
     // camera.setDisplayOrientation(90); 
     } 
}); 

Vorschau Klasse:

class Preview extends ViewGroup implements SurfaceHolder.Callback { 
    private final String TAG = "Preview"; 

    SurfaceView mSurfaceView; 
    SurfaceHolder mHolder; 
    Size mPreviewSize; 
    List<Size> mSupportedPreviewSizes; 
    Camera mCamera; 

    @SuppressWarnings("deprecation") 
    Preview(Context context, SurfaceView sv) { 
     super(context); 

     mSurfaceView = sv; 
     // addView(mSurfaceView); 

     mHolder = mSurfaceView.getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 

    public void setCamera(Camera camera) { 
     mCamera = camera; 
     if (mCamera != null) { 

      // get Camera parameters 
      Camera.Parameters params = mCamera.getParameters(); 

      mSupportedPreviewSizes = params.getSupportedPreviewSizes(); 
      requestLayout(); 

      List<String> focusModes = params.getSupportedFocusModes(); 
      if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) { 
       // set the focus mode 
       params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO); 
       // set Camera parameters 
       mCamera.setParameters(params); 
      } 
     } 
    } 

    @Override 
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
     // We purposely disregard child measurements because act as a 
     // wrapper to a SurfaceView that centers the camera preview instead 
     // of stretching it. 
     final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec); 
     final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec); 
     setMeasuredDimension(width, height); 

     if (mSupportedPreviewSizes != null) { 
      mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, width, height); 
     } 
    } 

    @Override 
    protected void onLayout(boolean changed, int l, int t, int r, int b) { 
     if (changed && getChildCount() > 0) { 
      final View child = getChildAt(0); 

      final int width = r - l; 
      final int height = b - t; 

      int previewWidth = width; 
      int previewHeight = height; 
      if (mPreviewSize != null) { 
       previewWidth = mPreviewSize.width; 
       previewHeight = mPreviewSize.height; 
      } 

      // Center the child SurfaceView within the parent. 
      if (width * previewHeight > height * previewWidth) { 
       final int scaledChildWidth = previewWidth * height/previewHeight; 
       child.layout((width - scaledChildWidth)/2, 0, (width + scaledChildWidth)/2, height); 
      } else { 
       final int scaledChildHeight = previewHeight * width/previewWidth; 
       child.layout(0, (height - scaledChildHeight)/2, width, (height + scaledChildHeight)/2); 
      } 
     } 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     // The Surface has been created, acquire the camera and tell it where 
     // to draw. 
     try { 
      if (mCamera != null) { 
       mCamera.setPreviewDisplay(holder); 
      } 
     } catch (IOException exception) { 
      Log.e(TAG, "IOException caused by setPreviewDisplay()", exception); 
     } 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
     // Surface will be destroyed when we return, so stop the preview. 
     if (mCamera != null) { 
      mCamera.stopPreview(); 
     } 
    } 

    private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) { 
     final double ASPECT_TOLERANCE = 0.1; 
     double targetRatio = (double) w/h; 
     if (sizes == null) 
      return null; 

     Size optimalSize = null; 
     double minDiff = Double.MAX_VALUE; 

     int targetHeight = h; 

     // Try to find an size match aspect ratio and size 
     for (Size size : sizes) { 
      double ratio = (double) size.width/size.height; 
      if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) 
       continue; 
      if (Math.abs(size.height - targetHeight) < minDiff) { 
       optimalSize = size; 
       minDiff = Math.abs(size.height - targetHeight); 
      } 
     } 

     // Cannot find the one match the aspect ratio, ignore the requirement 
     if (optimalSize == null) { 
      minDiff = Double.MAX_VALUE; 
      for (Size size : sizes) { 
       if (Math.abs(size.height - targetHeight) < minDiff) { 
        optimalSize = size; 
        minDiff = Math.abs(size.height - targetHeight); 
       } 
      } 
     } 
     return optimalSize; 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
     if (mCamera != null) { 
      Camera.Parameters parameters = mCamera.getParameters(); 
      parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height); 
      requestLayout(); 

      mCamera.setParameters(parameters); 
      mCamera.startPreview(); 
     } 
    } 

} 

Answer 1

ein bekannter Fehler auf einigen Geräten für das Bild Es geschieht hier beschrieben Captures: https://code.google.com/p/android/issues/detail?id=1480

N ot sicher, ob Ihr Problem ist das gleiche, aber Sie sollten den Code erklärt in dieser Antwort von einer anderen Frage versuchen: https://stackoverflow.com/a/1932268/2206688

Answer 2

McAfee Antivirus der Täter in diesem case sein kann.

In diesem Fall sollte die Deinstallation das Problem beheben.