旋转图像但图像颜色暗且图像变形

Question

我想旋转图像更多时间，但我不能在onDraw方法中做到这一点，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();

}

通过图像旋转得很好，但是图像变形，非常难看，你能告诉我为什么吗，并给出给我一个好方法，谢谢

Answer 1

尝试使用 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 Paint Paint = new Paint();
Paint.setAntiAlias(true);然后旋转图像的中心旋转，图像变形发生了一点变化，我看看 围绕画布中的中心点旋转图像