Question

从服务获取数据时，我将所有数据重新加载到阵列列表中并传递给适配器，但是适配器显示我的旧数据。当我在适配器中打印阵列列表时，我在适配器中传递新数据。向我显示旧数据。当我加载新数据时数据我也清除了所有数据库。

我在视图寻呼机中加载数据，所以我创建了newInstance.so，下面的代码从服务获取数据并将其存储在arraylist中并传递给适配器

adapter = new PagerAdapter(activity.getSupportFragmentManager(),"TotalCount",firstCountArrayList,secondAcoountArrayList,totalCountArrayList);
        pager.setPageMargin(-400);
        pager.setAdapter(adapter);
        adapter.notifyDataSetChanged();
        pager.setOffscreenPageLimit(firstCountArrayList.size());

        tabs.setViewPager(pager,selected);

在PagerAdapter中，我得到了旧的arraylist数据

public class PagerAdapter extends FragmentPagerAdapter {

    String TotalCount = "";
    ArrayList<String> firstCountArrayList,secondAcoountArrayList,totalCountArrayList;

    public PagerAdapter(FragmentManager fm, String TotalCount, ArrayList<String> firstCountArrayList, ArrayList<String> secondAcoountArrayList, ArrayList<String> totalCountArrayList
                        ) {
        super(fm);
        //super(fm);
        this.TotalCount=TotalCount;


        this.firstCountArrayList=firstCountArrayList;
        this.secondAcoountArrayList=secondAcoountArrayList;   
this.totalCountArrayList=totalCountArrayList;

    }

    @Override
    public CharSequence getPageTitle(int position) {
        return firstCountArrayList.get(position);
    }

    @Override
    public int getCount() {
        return firstCountArrayList.size();
    }
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }
    @Override
    public Fragment getItem(int position) {




        Log.e(TAG," PagerAdapter firstCountArrayList==>"+firstCountArrayList.toString());
        return NewPageInstance.newInstance(position,firstCountArrayList,secondAcoountArrayList,totalCountArrayList);

所有数据传递到NewPageInstance并像之后在TextView上显示

   public static NewPageInstance newInstance(int position, String totalCount, ArrayList<String> firstCountArrayList, ArrayList<String> secondAcoountArrayList, ArrayList<String> totalCountArrayList) {

    totalCount=totalCount;
    firstCountArrayList=firstCountArrayList;
    secondAcoountArrayList=secondAcoountArrayList;
    totalCountArrayList=totalCountArrayList;
    }

所有数据均显示textview

这仅在第一次工作。不刷新视图寻呼机数据。

Answer 1

在视图页面适配器中添加以下代码：-

public int getItemPosition(Object object) {
return POSITION_NONE;

}

或视图寻呼机已更改的侦听器通知您的视图寻呼机适配器：-

mPagerAdapter.notifyDataSetChanged();

如何刷新查看寻呼机数据？

1 个答案: