//柔化效果
public static Bitmap changeToSoftness(Bitmap bitmap){
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int dst[] = new int[width*height];
bitmap.getPixels(dst, 0, width, 0, 0, width, height);

int R, G, B, pixel;
int pos, pixColor;
for(int y=0; y<height; y++){
for(int x=0; x<width; x++){
pos = y*width + x;
pixColor = dst[pos];
R = Color.red(pixColor); //(color >> 16) & 0xFF
G = Color.green(pixColor); //(color >> 8) & 0xFF;
B = Color.blue(pixColor); //color & 0xFF
pixel = 255 - (255-R)*(255-R)/255;
if (pixel < 0)
pixel = -pixel;
pixel = pixel * R / 256;
if (pixel > 255)
pixel = 255;
R = pixel;

pixel = 255 - (255-G)*(255-G)/255;
if (pixel < 0)
pixel = -pixel;
pixel = pixel * R / 256;
if (pixel > 255)
pixel = 255;
G = pixel;

pixel = 255 - (255-B)*(255-B)/255;
if (pixel < 0)
pixel = -pixel;
pixel = pixel * G / 256;
if (pixel > 255)
pixel = 255;
B = pixel;

dst[pos] = Color.rgb(R, G, B);
}
}
Bitmap processBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
processBitmap.setPixels(dst, 0, width, 0, 0, width, height);

return processBitmap;
}