创建全屏幕相机表面视图没有拉伸

问题描述：

我正在创建我的相机表面，但横向和纵向两个预览都拉伸像图像给出如下。请帮我设置正确的参数。创建全屏幕相机表面视图没有拉伸

getWindow().setFormat(PixelFormat.UNKNOWN); 
      surfaceView = (SurfaceView)findViewById(R.id.surfaceview); 
      surfaceHolder = surfaceView.getHolder(); 
      surfaceHolder.addCallback(this); 
      surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 


camera = Camera.open(); 

camera.setPreviewDisplay(surfaceHolder);

答

你可以应用适当的Matrix到SurfaceView，我用下面的方法来固定我的图片：

// Adjustment for orientation of images 
public static Matrix adjustOrientation(SurfaceView preview) { 
    Matrix matrix = new Matrix(preview.getMatrix()); 
    try { 
     ExifInterface exifReader = new ExifInterface(path); 

     int orientation = exifReader.getAttributeInt(
       ExifInterface.TAG_ORIENTATION, -1); 

     if (orientation == ExifInterface.ORIENTATION_NORMAL) { 
      // do nothing 
     } else if (orientation == ExifInterface.ORIENTATION_ROTATE_90) { 
      matrix.postRotate(90); 
     } else if (orientation == ExifInterface.ORIENTATION_ROTATE_180) { 
      matrix.postRotate(180); 
     } else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) { 
      matrix.postRotate(270); 
     } 

    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    return matrix; 
}

这得到了Bitmap正确的方向。然后，您可以根据您的宽度和高度，通过以下方法重新缩放Bitmap：

public static Bitmap getScaledBitmap(int bound_width, int bound_height, String path) { 

    int new_width; 
    int new_height; 
    Bitmap original_img; 

    BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 

    original_img = BitmapFactory.decodeFile(path, options); 
    int original_width = options.outWidth; 
    int original_height = options.outHeight; 

    new_width = original_width; 
    new_height = original_height; 

    // check if we need to scale the width 
    if (original_width > bound_width) { 
     // scale width to fit 
     new_width = bound_width; 
     // scale height to maintain aspect ratio 
     new_height = (new_width * original_height)/original_width; 
    } 

    // check if we need to scale even with the new height 
    if (new_height > bound_height) { 
     // scale height to fit instead 
     new_height = bound_height; 
     // adjust width, keep in mind the aspect ratio 
     new_width = (new_height * original_width)/original_height; 
    } 

    Bitmap originalBitmap = BitmapFactory.decodeFile(path); 
    Bitmap resizedBitmap = Bitmap.createScaledBitmap(originalBitmap, new_width, new_height, true); 
    return resizedBitmap; 
}

希望这有助于。

创建全屏幕相机表面视图没有拉伸

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