float[][] nArray ={ new float[] {1, 0, 0, 0, 0},
                               new float[] {0, 1, 0, 0, 0},
                               new float[] {0, 0, 1, 0, 0},
                              new float[] {0, 0, 0, opacity, 0},
                                 new float[] {0, 0, 0, 0, 1}};
                   ColorMatrix matrix = new ColorMatrix(nArray);
里面每个数代表什么啊，我只知道opacity 是透明度

主要是不明白为什么要用二维数组啊，就一个float[]={1,1,1,1,1}有区别吗

学习了，谢谢