Android 判断图片是否存在透明区域

Bitmap bgBitmap = BitmapFactory.decodeFile(fileInfo.path);
int color1 = bgBitmap.getPixel(0, 0);
int a1 = Color.alpha(color1);
int color2 = bgBitmap.getPixel(bgBitmap.getWidth() /2, bgBitmap.getHeight() / 2);
int a2 = Color.alpha(color2);
if (a1 != 255 || a2 != 255) {
    Log.d(TAG, "PicSelected is transparent ");
} else {
    Log.d(TAG, "onPicSelected is not transparent ");
}

获取图片的像素点进行判断，如果目标图片不是那种均匀透明度的图片的话，可能就需要挨个像素点去遍历了