//改變圖片的亮度方法 0--原樣 >0---調亮 <0---調暗  private void changeLight(ImageView imageView, int brightness) {    ColorMatrix cMatrix = new ColorMatrix();    cMatrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0,        brightness,// 改變亮度        0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 });    imageView.setColorFilter(new ColorMatrixColorFilter(cMatrix));  }