如何实时更改图像的像素颜色

我需要开发一个函数来实时更改图像的像素颜色,我目前编写的这部分代码似乎部分有效

private void changePixelsColor() {
        try {
        tileView.buildDrawingCache(true);
        tileView.setDrawingCacheEnabled(true);

        int height = tileView.getDrawingCache().getHeight();
        int width = tileView.getDrawingCache().getWidth();
        int[] pixelNumber = new int[height * width];

        tileView.getDrawingCache().getPixels(pixelNumber, 0, width, 0, 0, width, height);

        for (int i = 0; i < pixelNumber.length; i++) {
            if (String.valueOf(pixelNumber[i]).length() > 2) {
                String hexColor = "#" + Integer.toHexString(pixelNumber[i]).substring(2);
                if (hexColor.compareToIgnoreCase("#f0f1f0") == 0) {
                    pixelNumber[i] = Color.RED;
                }
            }
        }

        tileView.getDrawingCache().setPixels(pixelNumber, 0, width, 0, 0, width, height);

        File file = new File(MYPATH);
        FileOutputStream out = new FileOutputStream(file);
        Bitmap mappedCar = Bitmap.createBitmap(tileView.getDrawingCache());
        mappedCar.compress(Bitmap.CompressFormat.JPEG, 100, out);
        mappedCar.recycle();
        out.flush();
        out.close();

        tileView.setDrawingCacheEnabled(false);
        tileView.destroyDrawingCache();
    } catch (Exception e) {

    }       
}

具体地说,我使用“TileView”库向用户显示一幅图像(我简化了解释),在代码的某个部分,我需要扫描图像的所有像素,并替换一些像素(例如,用红色替换#f0f1f0)。

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