Resources res = this.getResources();
BitmapDrawable d = (BitmapDrawable) res.getDrawable(R.mipmap.bg_default_cover);
Bitmap bitmap = d.getBitmap();
Bitmap transparentBitmap = getTransparentBitmap(bitmap, 50);
iv_cover.setImageBitmap(transparentBitmap);
iv_cover.setScaleType(ImageView.ScaleType.CENTER_CROP);
iv_cover.setClickable(false);
public static Bitmap getTransparentBitmap(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[i] = (number << 24) | (argb[i] & 0x00FFFFFF);
}
sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg
.getHeight(), Bitmap.Config.ARGB_8888);
return sourceImg;
}