Question

Java报错：The operator & is undefined for the argument type(s) int[], int

/**
* 图片透明度处理
* Android 图片透明度处理代码
* @param sourceImg
* 原始图片
* @param number
* 透明度
* @return
*/
public static Bitmap setAlpha(Bitmap sourceImg, int number) {
int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()];
sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0,sourceImg.getWidth(), sourceImg.getHeight());// 获得图片的ARGB值
number = number * 255 / 100;
for (int i = 0; i < argb.length; i++) {
argb = (number << 24) | (argb & 0x00ffffff);// 修改最高2位的值
}
sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888);
return sourceImg;
}

Answer 1

for (int i = 0; i < argb.length; i++) {
argb = (number << 24) | (argb & 0x00ffffff);// 修改最高2位的值
}

里面 改成argb[i] = (number << 24) | (argb[i] & 0x00ffffff);//

追问

之前试过了，但是报的错是Type mismatch: cannot convert from int to int[]

Answer 2

操作符&不能将int型用在int[]型里argb = (number << 24) | (argb & 0x00ffffff);// 修改最高2位的这句报错了吧，要做and运算，请取出argb里的值，比如argb[i] & 0x00ffffff你再按我说的试试吧