更改gif动画文件的背景

Question

我保存动画文件并与帮助下一个代码共享：

try {
        //create an temp file in app cache folder
        File outputFile = new File(getCacheDir(), "animation" + ".gif");
        FileOutputStream outPutStream = new FileOutputStream(outputFile);

        //Saving the resource GIF into the outputFile:
        InputStream is = getResources().openRawResource(getAnimationDrawableIdByMediaId(mPickedAnimationId));
        BufferedInputStream bis = new BufferedInputStream(is);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int current = 0;
        while ((current = bis.read()) != -1) {
            baos.write(current);
        }
        FileOutputStream fos = new FileOutputStream(outputFile);
        fos.write(baos.toByteArray());

        //
        outPutStream.flush();
        outPutStream.close();

        //share file
        Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
        shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(outputFile));
        shareIntent.setType("image/gif");
        startActivity(Intent.createChooser(shareIntent, "Share"));
    }
    catch (Exception e) { Toast.makeText(this, "error", Toast.LENGTH_LONG);}

但是我注意到在Telegram中这个动画的背景是白色的，但在Viber中它是黑色的。有没有办法设置自定义背景颜色？也许还有其他实现。