获取bitmap字节数

针对图片 压缩 需要  查看  到底 压缩了多少 byte，

public static int getBitmapBytes(Bitmap bitmap) {    int result;    if(VERSION.SDK_INT >= 12) {        result = bitmap.getByteCount();    } else {        result = bitmap.getRowBytes() * bitmap.getHeight();    }    if(result < 0) {        throw new IllegalStateException("Negative size: " + bitmap);    } else {        return result;    }}