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

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