在android中转换颜色代码为浮点数组

Question

color资源文件:

<color name="red">#ffff5454</color>

代码:

int color = Resources.getColor(getResources().Color.red);
// how to get paramArrayOfFloat from color?
ColorMatrix localColorMatrix = new ColorMatrix();
localColorMatrix.setSaturation(0.0F);
localColorMatrix.set(paramArrayOfFloat);

如何从色号中得到paramArrayOfFloat ?我想把数字转换成浮点数。这在android中可能吗?

Answer 1

ColorMatrix:

4x5矩阵，用于转换位图的颜色+alpha分量。矩阵存储在单个数组中，其处理如下:[a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s t]应用于颜色[r, g, b, a]，结果颜色计算为(装夹后)R' = a*R + b*G + c* b + d* a + e;G' = f*R + G *G + h*B+ i*A + j;B' = k*R + l*G + m*B + n*A + 0;A' = p*R + q*G + R *B + s*A + t;

For red color -

 float[] colorTransform = {
        0, 1f, 0, 0, 0, 
        0, 0, 0f, 0, 0,
        0, 0, 0, 0f, 0, 
        0, 0, 0, 1f, 0};
ColorMatrix localColorMatrix = new ColorMatrix();
localColorMatrix.setSaturation(0.0F); //Remove Colour 
localColorMatrix.set(colorTransform); //Apply Red say

查看更多信息:ColorMatrixSample和ColorMatrix.

注意:

您可以查看conver- a-web-color to-an-rgb-float-array-for-after-effects的链接