旋转图像，但图像色彩暗淡和图像变形

Question

我要旋转我像更多的时间，我不能这样做在的onDraw方法，我的代码是：

  options = new BitmapFactory.Options(); 
    options.inScaled = false; 
    options.inJustDecodeBounds = false; 
    options.inDither = false; 

    options.inScaled = false; 
    options.inPreferredConfig = Bitmap.Config.ARGB_8888; 

     public void setAddBmpImage(int rotate) { 

    byte[] by = getBitmapByte(rotatedBitmap); 
    Bitmap source = BitmapFactory.decodeByteArray(by, 0, by.length, options); 

    Bitmap bmpSephia = Bitmap.createBitmap(rotatedBitmap.getWidth(), rotatedBitmap.getHeight(), Bitmap.Config.ARGB_8888); 
    Canvas canvas = new Canvas(bmpSephia); 
    canvas.rotate(rotate); 
    canvas.drawBitmap(source, 0, 0, null); 
    rotatedBitmap= bmpSephia; 
    imageStartX = (screenWidth/2 - rotatedBitmap.getWidth()/2); 
     imageStartY = (screenHeight/2 - rotatedBitmap.getHeight()/2); 
     invalidate(); 

} 

通过图像十分旋转好了，但图像变形，这是非常丑陋的，你能告诉我为什么，并给我一个很好的方法，谢谢使用

Answer 1

尝试setAntiAlias(true)

Canvas canvas = new Canvas(bmpSephia); 
canvas.rotate(rotate); 
Paint paint = new Paint(); 
paint.setAntiAlias(true); 
canvas.drawBitmap(source, 0, 0, paint); 

或者

BitmapDrawable bmdraw = new BitmapDrawable(bmpSephia); 
bmdraw.setAntiAlias(true); 
Canvas canvas = new Canvas(bmdraw.getBitmap()); 
canvas.rotate(rotate); 

Answer 2

我已经使用了@ user7777方法，并修改了Paint paint = new Paint（）; paint.setAntiAlias（true）;然后旋转图像的中心旋转，图像变形改变了一点点alos我看看rotate image in around its center point in canvas