根据图片获取图片中最多的颜色

Palette p = Palette.from(resource).generate();
                            int defaultColor =
                                    ContextCompat.getColor(ClipActivity.this, android.R.color.holo_blue_bright);
                            int[] colors = new int[7];
                            colors[0] = p.getMutedColor(defaultColor);
                            colors[1] = p.getDarkMutedColor(defaultColor);
                            colors[2] = p.getLightMutedColor(defaultColor);
                            colors[3] = p.getVibrantColor(defaultColor);
                            colors[4] = p.getDarkVibrantColor(defaultColor);
                            colors[5] = p.getLightVibrantColor(defaultColor);
                            colors[6] = p.getDominantColor(defaultColor);
//
 
                            ll_data.removeAllViews();
//                            List<Palette.Swatch> swatches = p.getSwatches();
//                            for (Palette.Swatch swatch : swatches) {
//                                int rgb1 = swatch.getRgb();
//                                setTextBgColor(rgb1);
//                            }
//                            for (int color : colors) {
//                                setTextBgColor(color);
//                            }
                            int color4 = getBigColor(resource);

    private static Bitmap small(Bitmap bitmap) {
      Matrix matrix = new Matrix();
      matrix.postScale(0.25f, 0.25f);
      Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
      return resizeBmp;
  }
  
   public static ArrayList<Integer> getPicturePixel(Bitmap bitmap) {
 
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
 
        // 保存所有的像素的数组，图片宽×高
        int[] pixels = new int[width * height];
 
        bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
 
        ArrayList<Integer> rgb = new ArrayList<>();
        for (int i = 0; i < pixels.length; i++) {
            int clr = pixels[i];
            int red = (clr & 0x00ff0000) >> 16; // 取高两位
            int green = (clr & 0x0000ff00) >> 8; // 取中两位
            int blue = clr & 0x000000ff; // 取低两位
//            Log.d("tag", "r=" + red + ",g=" + green + ",b=" + blue);
            int color = Color.rgb(red, green, blue);
            //除去白色和黑色
            if (color != Color.WHITE && color != Color.BLACK) {
                rgb.add(color);
            }
        }
 
        return rgb;
    }
 
    public static int getBigColor(Bitmap bitmap) {
        ArrayList<Integer> picturePixel = getPicturePixel(small(bitmap));
        //计数相同颜色数量并保存
        HashMap<Integer, Integer> color2 = new HashMap<>();
        for (Integer color : picturePixel) {
            if (color2.containsKey(color)) {
                Integer integer = color2.get(color);
                integer++;
                color2.remove(color);
                color2.put(color, integer);
 
            } else {
                color2.put(color, 1);
            }
        }
        //挑选数量最多的颜色
        Iterator iter = color2.entrySet().iterator();
        int count = 0;
        int color = 0;
        while (iter.hasNext()) {
            Map.Entry entry = (Map.Entry) iter.next();
            int value = (int) entry.getValue();
            if (count < value) {
                count = value;
                color = (int) entry.getKey();
            }
 
        }
        return color;
    }