Bitmap缩放

利用Matrix，对Bitmap进行缩放

 

Matrix matrix = new Matrix();

matrix.postScale(scaleWidth, scaleHeight);

 

Bitmap resizeBitmap = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);

 

imageView.setImageBitmap(resizeBitmap);

 

还可以对bitmap进行旋转呢

matrix.setRotate(rotateAngle);