片段當前不在FragmentManager中，同時通知viewpager

Question

我面臨一個問題，即通知viewPager新數據集。 我有兩個viewpager在同一個活動，我想通知，如果有任何新的數據到達

public class DetailActivity extends FragmentActivity 
{ 
    private ViewPager dishPager,restaurantPager; 
    public DishPager dishPagerAdapter; 
    public RestaurantPager restaurantPagerAdapter; 
    public int dishPageNumber; 
    ModelManager objModelManager; 
    PersistentStoreHelper persistentStoreHelper; 
    DishDetailPageModel objDetailPageModel; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 

     LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver, 
      new IntentFilter("Broadcasting_from_DetailModel")); 

     dishPager = (ViewPager) findViewById(R.id.pager); 
     restaurantPager = (ViewPager) findViewById(R.id.pagerRest); 
     dishPagerAdapter = new DishPager(getSupportFragmentManager()); 
     restaurantPagerAdapter = new RestaurantPager(getSupportFragmentManager()); 
     dishPager.setAdapter(dishPagerAdapter); 
     restaurantPager.setAdapter(restaurantPagerAdapter); 
     } 
     private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() { 
     @Override 
     public void onReceive(Context context, Intent intent) { 

     restaurantPagerAdapter.notifyDataSetChanged(); 
     dishPagerAdapter.notifyDataSetChanged(); 

    } 
private class DishPager extends FragmentStatePagerAdapter { 
    public DishPager(FragmentManager fm) { 
     super(fm); 
     dishPageNumber = //connected to model 
    } 
    @Override 
    public Fragment getItem(int position) { 
     String img = null; 
     //data is a bundle loaded from the model 
     return DishPagerFragment.create(data); 
    }} 
    @Override 
    public int getItemPosition(Object object) { 
     return POSITION_NONE; 
    } 
    @Override 
    public int getCount() { 
     return dishPageNumber; 
    } 
    } 
private class RestaurantPager extends FragmentStatePagerAdapter { 
    public DishPager(FragmentManager fm) { 
     super(fm); 

    } 
    @Override 
    public Fragment getItem(int position) { 
     String img = null; 
     //data is a bundle loaded from the model 
     return RestaurantPagerFragment.create(data); 
    }} 
    @Override 
    public int getItemPosition(Object object) { 
     return POSITION_NONE; 
    } 
    @Override 
    public int getCount() { 
     return 1; 
    } 
    } 
    } 

我每listItemClick

問題呼籲從我的MainActivity這個DetailActivity是當我加載DetailActivity它第一次運行沒有任何問題。 但是，第二次DetailActivity加載它時通知viewpager創建問題。

我收到以下錯誤。

12-02 20:53:59.864: E/AndroidRuntime(14609): java.lang.IllegalStateException: Fragment 

RestaurantPagerFragment{1e750466} is not currently in the FragmentManager 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.app.FragmentManagerImpl.saveFragmentInstanceState(FragmentManager.java:599) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.app.FragmentStatePagerAdapter.destroyItem(FragmentStatePagerAdapter.java:136) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.view.ViewPager.dataSetChanged(ViewPager.java:874) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.view.ViewPager$PagerObserver.onChanged(ViewPager.java:2824) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.database.DataSetObservable.notifyChanged(DataSetObservable.java:37) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.view.PagerAdapter.notifyDataSetChanged(PagerAdapter.java:276) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at com.hibrise.androidtomato.view.DetailActivity$1.onReceive(DetailActivity.java:130) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:297) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.content.LocalBroadcastManager.access$000(LocalBroadcastManager.java:46) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.support.v4.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:116) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.os.Handler.dispatchMessage(Handler.java:102) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.os.Looper.loop(Looper.java:135) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at android.app.ActivityThread.main(ActivityThread.java:5221) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at java.lang.reflect.Method.invoke(Native Method) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at java.lang.reflect.Method.invoke(Method.java:372) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
12-02 20:53:59.864: E/AndroidRuntime(14609): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

請解決問題。 如果您在理解問題時有任何問題，請寫評論。 在此先感謝。

Answer 1

可以幫助它

public int getItemPosition(Object object) { 
     if (((Fragment) object).isAdded()) { 
      return PagerAdapter.POSITION_NONE; 
     } else { 
      return super.getItemPosition(object); 
     } 
    }