反色效果函数

// 反色效果函数
public static Bitmap chageToInvert(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();

int colorArray[] = new int[width * height];
int r, g, b, index;
bitmap.getPixels(colorArray, 0, width, 0, 0, width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
index = y * width + x;
r = (colorArray[index] >> 16) & 0xff;
g = (colorArray[index] >> 8) & 0xff;
b = colorArray[index] & 0xff;
colorArray[index] = 0xff000000 | (r << 16) | (g << 8) | b;

r = (255-(int)(colorArray[index]& 0x00FF0000) >>> 16);
g = (255-(int)(colorArray[index]& 0x0000FF00) >>> 8);
b = (255-(int)(colorArray[index] & 0x000000FF));

colorArray[index] = (255 << 24) + (r << 16) + (g << 8) + b;
}
}
Bitmap returnBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
returnBitmap.setPixels(colorArray, 0, width, 0, 0, width, height);

return returnBitmap;
}