颜色替换

将Bitmap中某个颜⾊替换成其他颜⾊

使⽤ARGB(255,0,0,0)也就是⿊⾊替换bitmap中的0x616161，容忍度为50范围的颜⾊

privateBitmaphandleCrossImageBack(Bitmapcrossimage){

//startwithaBitmapbmp

BitmapnewBmp=(_8888,true);

Canvasc=newCanvas(newBmp);

//gettheintforthecolourwhichneedstoberemoved

Paintpaint=newPaint();//去锯齿

iAlias(true);//防抖动

her(true);//图像过滤

terBitmap(true);

B(255,0,0,0);//ARGBforthecolortoreplace,blackreplacegray

rmode(newAvoidXfermode(0x616161,50,));

int(paint);

returnnewBmp;

}