如何使用sdcard中的多个图像启动动画Drawable？

Question

您好我试图用我的手机内存中的Bitmap开始一个AnimationDrawable：

public void startAnimation(JSONArray listImgGroup, RelativeLayout rl) throws JSONException {
        if (listImgGroup.length() > 0) {
            DisplayMetrics metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);
                for (int i = 0; i < listImgGroup.length(); i++) {
                    ImageView imgGroup = new ImageView(this);


                    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams((int) (metrics.widthPixels * listImgGroup.getJSONObject(i).getDouble("size_x")), (int) (metrics.heightPixels * listImgGroup.getJSONObject(i).getDouble("size_y")));
                    params.leftMargin = (int) (metrics.widthPixels * listImgGroup.getJSONObject(i).getDouble("position_x"));
                    params.topMargin = (int) (metrics.heightPixels * listImgGroup.getJSONObject(i).getDouble("position_y"));



                    JSONArray imgDic = listImgGroup.getJSONObject(i).getJSONArray("Img");
                    Log.i("IMG DICTIONNAIRE = ", "" + imgDic);

                    for (int j = 0; j < imgDic.length(); j++) {

                        //Bitmap bMap = BitmapFactory.decodeFile("/storage/sdcard0/saved_img/"+imgDic.getJSONObject(j).getString("name"));
                        animation = new AnimationDrawable();

                        animation.addFrame(new BitmapDrawable(getResources(), BitmapFactory.decodeFile("/storage/sdcard0/saved_img/"+imgDic.getJSONObject(j).getString("name"))), 1000);
                        animation.setCallback(imgGroup);
                        animation.start();
                        imgGroup.setImageDrawable(animation);
                        animation.setOneShot(false);
                        Log.i("NAME ANIMATION", imgDic.getJSONObject(j).getString("name"));
                    }
                    rl.addView(imgGroup, params);
                    animation.stop();
                }
            }

它可以工作，但我只看到我的AnimationDrawable中的第二个图像。我怎样才能看到第一个并将第一个动画转到第二个？谢谢你的家伙