Crop an image to a shape using masking in Android

imagecroping.java

public void makeMaskImage(ImageView mImageView, int mContent){
 
  Bitmap original = BitmapFactory.decodeResource(getResources(), mContent);
  Bitmap mask = BitmapFactory.decodeResource(getResources(),R.drawable.mask);
  Bitmap result = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(), Config.ARGB_8888);
  Canvas mCanvas = new Canvas(result);
  Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
  paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
  mCanvas.drawBitmap(original, 0, 0, null);
  mCanvas.drawBitmap(mask, 0, 0, paint);
  paint.setXfermode(null);
  mImageView.setImageBitmap(result);
  mImageView.setScaleType(ScaleType.CENTER);
  mImageView.setBackgroundResource(R.drawable.frame);
  
 }