此方法切換的只是圖片用的是簡單的handler，並不是自動輪播圖片

佈局：

<ImageView
android:id="@+id/faxian_img"
android:layout_width="match_parent"
android:layout_height="200dp" />

=====================程式碼===========================

public class FragmentFaxin extends Fragment{

    private PullToRefreshScrollView refreshScrollView
 
;
    private ImageView imageView;
    private GridView gridView;
    List<String> list=new ArrayList<>();
    private int index=0;
    Handler handler=new Handler(){
        @Override
public void handleMessage(Message msg) {

	//接到訊息，顯示圖片
            if (msg.what==0){
                index++;
                ImageLoader.getInstance
 
().displayImage(list.get(index%list.size()),imageView, ImageUtil.getoption());
                handler.sendEmptyMessageDelayed(0,3000);
            }
        }
    };
    @Nullable
    @Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_faxian
 
, container, false);
        
        imageView = (ImageView) view.findViewById(R.id.faxian_img);
   	
        return view;
    }

    @Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        String path="xxxxxxxxxxxxx";
        NetConnection.getconnection(getActivity(), path, new CallJsonBack() {
            @Override
public void getcallBack(String json) {
                if (json!=null){
                    Gson gson=new Gson();
                    ImageBean imageBean = gson.fromJson(json, ImageBean.class);
                    List<ImageBean.ResultBean.DataBean.StepsBean> steps = imageBean.getResult().getData().get(0).getSteps();
                    for (ImageBean.ResultBean.DataBean.StepsBean stepsBean: steps) {
                        list.add(stepsBean.getImg());
                    }

			//現在圖片集合有資料,,,,展示圖片,,,展示第一張圖片
                    ImageLoader.getInstance().displayImage(list.get(0),imageView, ImageUtil.getoption());
                    handler.sendEmptyMessageDelayed(0,3000);
                }

            }
        });

    }
}