ColorFilter类
以前没用到过LightingColorFilter这个类 ,google了下
@Override
protected void onDraw(Canvas canvas) {
int mul = 0xFFFFFF00; //remove BLUE component
int add = 0x0000FF00; //set GREEN full
LightingColorFilter lightingColorFilter = new LightingColorFilter(mul, add);
Paint MyPaint_Normal = new Paint();
Paint MyPaint_Lighting = new Paint();
MyPaint_Lighting.setColorFilter(lightingColorFilter);
Bitmap myBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(myBitmap, 400, 100, MyPaint_Normal);
canvas.drawBitmap(myBitmap, 500, 100, MyPaint_Lighting);
};
因为是基于三基色配色方案来改的,
而且
0xFFFFFF00 0x表示16进制数,前两个ff表示的是透明度,00-ff,接下来两个ff表示红R,00-ff,后面两个ff表示绿G,00-ff,最后两个ff表示蓝B,00-ff,
所以呢
int mul = 0xFFFFFF00; //remove BLUE component 移除蓝色B部分,可以根据三基色配色图看
int add = 0x0000FF00; //set GREEN full 绿色的填满,差不多就这个意思了。。。
具体的还可以去测试下
float[] colorMatrix = {
1, 0, 0, 0, 0, //red
0, 0, 0, 0, 0, //green
0, 0, 0, 0, 0, //blue
0, 0, 0, 1, 0 //alpha
};
Paint MyPaint = new Paint();
ColorFilter colorFilter = new ColorMatrixColorFilter(colorMatrix);
MyPaint.setColorFilter(colorFilter);
Bitmap myBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(myBitmap, 100, 100, MyPaint);
};
这个画出来的效果就是红色和黑色了,因为不透明,这个是color矩阵的用法