Android ViewPager未更新

我有一个

ViewPager

页面和

选项卡

。在

AsyncTask

中，我加载数据并更新

ViewPager

，但没有任何更改。在我检查过的LogCat中，我需要数据

MainClass.java

    mViewPager = (ViewPager) findViewById(R.id.cinema_view_pager);
    mTabPager = new TabPager("Загрузка");
    mViewPager.setAdapter(mTabPager);

    LoadCinema cinema = new LoadCinema(this,0);
    cinema.execute();

TabPager（适配器）。类

public class TabPager extends PagerAdapter{

    private String message = "";

    public TabPager(String msg){
        message = msg;
    }

    @Override
    public int getCount() {
        return 1;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view.equals(object);
    }

    public void update(String msg){
        message = msg;
        notifyDataSetChanged();
    }

    @Override
    public View instantiateItem(View container, int position){
        View v = getLayoutInflater().inflate(R.layout.cinema_layout, null);

        TextView text = (TextView) v.findViewById(R.id.textView1);
        text.setText(message+"Message" +"");

        ((ViewPager) container).addView(v);
        return v;           
    }

    public void destroyItem(View container, int position, Object object) {
        ((ViewPager) container).removeView((View) object);
    }

}  

public void onPostExecute(List<CinemaCategory> result){
    super.onPostExecute(result);
    CinemaCategory cat = result.get(page);  
    cinema.mTabPager.update(cat.getDescription());
}

LoadCinema.class

public class TabPager extends PagerAdapter{

    private String message = "";

    public TabPager(String msg){
        message = msg;
    }

    @Override
    public int getCount() {
        return 1;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view.equals(object);
    }

    public void update(String msg){
        message = msg;
        notifyDataSetChanged();
    }

    @Override
    public View instantiateItem(View container, int position){
        View v = getLayoutInflater().inflate(R.layout.cinema_layout, null);

        TextView text = (TextView) v.findViewById(R.id.textView1);
        text.setText(message+"Message" +"");

        ((ViewPager) container).addView(v);
        return v;           
    }

    public void destroyItem(View container, int position, Object object) {
        ((ViewPager) container).removeView((View) object);
    }

}  

public void onPostExecute(List<CinemaCategory> result){
    super.onPostExecute(result);
    CinemaCategory cat = result.get(page);  
    cinema.mTabPager.update(cat.getDescription());
}

public void onPostExecute（列表结果）{
super.onPostExecute（结果）；
CinemaCategory cat=result.get（第页）；
cinema.mtabpage.update（cat.getDescription（））；
}

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我尝试了三页，当我切换到最后一页时，我有了数据，然后切换到第一页查看页面更新。现在我有了答案，谢谢

要添加适配器，需要添加此代码

    public int getItemPosition(Object object) {
           return POSITION_NONE;
    }

---

考虑使用

FragmentStatePagerAdapter

而不是

PagerAdapter

public class TabPager extends FragmentStatePagerAdapter {

...

}

---

发布“mTabPager”的源刷新viewpagers数据时，前两个viewpagers未刷新，其他viewpagers数据正在更改。请帮帮我。