Фрагмент не показывают содержание TabHost во второй раз

Question

Ну ... Я работаю с фрагментами, android.support.v4.widget.DrawerLayout, TabHost и ViewPager ... У меня есть следующий код:

main_base.xml

<android.support.v4.widget.DrawerLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

<FrameLayout 
     android:id="@+id/content_frame" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

<ListView 
     android:id="@+id/listado_pintado" 
     android:layout_width="240dp" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:choiceMode="singleChoice" 
     android:divider="@android:color/transparent" 
     android:dividerHeight="0dp" 
     android:background="#fff"/> 

моя активность:

Main_Activity

package com.examples.planets; 

import android.annotation.SuppressLint; 
import android.app.Fragment; 
import android.app.FragmentManager; 
import android.content.Context; 
import android.content.res.Configuration; 
import android.os.Bundle; 
import android.support.v4.app.ActionBarDrawerToggle; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.widget.DrawerLayout; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
import android.widget.TabHost; 

import com.examples.planets.TabsFragmentos; 
import com.examples.planets.fragmentos.mercury.TabFragmentDescribeMercury; 
import com.examples.planets.fragmentos.mercury.TabFragmentShowMercury; 
import com.examples.planets.paginadores.AdaptadorDePaginas; 
import com.examples.planets.utilidades.enums.Menu_; 

import java.util.HashMap; 
import java.util.List; 
import java.util.Vector; 

public class Main_Activity extends FragmentActivity{ 


    public DrawerLayout mDrawerLayout; 
    private ListView mDrawerList; 
    private ActionBarDrawerToggle mAccionadorDelDrawer; 

    private CharSequence mDrawerTitulo; 
    private CharSequence mTitulo; 
    private String[] menuPrincipal; 


    public void cargarMenu(){ 
     //Titulo 
     mTitulo = mDrawerTitulo = getTitle(); 

     //Main_Activity Principal 
     menuPrincipal = getResources().getStringArray(R.array.menu_principal_array); 

     //Diseñador del Layout 
     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 


     mDrawerList = (ListView) findViewById(R.id.listado_pintado); 


     mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 


     mDrawerList.setAdapter(new ArrayAdapter<String>(this, 
       R.layout.menu_listado, menuPrincipal)); 


     mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); 


     getActionBar().setDisplayHomeAsUpEnabled(true); 
     getActionBar().setHomeButtonEnabled(true); 

     mAccionadorDelDrawer = new ActionBarDrawerToggle(
       this,     /* host Activity */ 
       mDrawerLayout,   /* DrawerLayout object */ 
       R.drawable.ic_drawer, /* Imagen del Accionador del menu */ 
       R.string.drawer_open, /* "open drawer" description for accessibility */ 
       R.string.drawer_close /* "close drawer" description for accessibility */ 
     ) { 
      public void onDrawerClosed(View view) { 
       getActionBar().setTitle(mTitulo); 
       invalidateOptionsMenu(); 
      } 

      public void onDrawerOpened(View drawerView) { 
       getActionBar().setTitle(mDrawerTitulo); 
       invalidateOptionsMenu(); 
      } 
     }; 
     mDrawerLayout.setDrawerListener(mAccionadorDelDrawer); 
    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.menu_base); 

     cargarMenu(); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     MenuInflater inflater = getMenuInflater(); 
     //inflater.inflate(R.menu.main, menu); 
     return super.onCreateOptionsMenu(menu); 
    } 


    @Override 
    public boolean onPrepareOptionsMenu(Menu menu) { 
     // If the nav drawer is open, hide action items related to the content view 
     boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); 
     //menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); 
     return super.onPrepareOptionsMenu(menu); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     if (mAccionadorDelDrawer.onOptionsItemSelected(item)) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 


    private class DrawerItemClickListener implements ListView.OnItemClickListener { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
      selectItem(position); 
     } 
    } 


    private void selectItem(int position) { 
     android.support.v4.app.FragmentManager manager = super.getSupportFragmentManager(); 
     TabsFragmentos firstFragment = new TabsFragmentos(position, this, super.getSupportFragmentManager()); 
     manager.beginTransaction() 
       .replace(R.id.content_frame, firstFragment).commit(); 


     mDrawerList.setItemChecked(position, true); 
     setTitle(menuPrincipal[position]); 
     mDrawerLayout.closeDrawer(mDrawerList); 
     //cargarMenu(); 
    } 

    @Override 
    public void setTitle(CharSequence title) { 
     mTitulo = title; 
     getActionBar().setTitle(mTitulo); 
    } 

    /** 
    * Cuando usamos el ActionBarDrawerToggle, se debería llamar este durante el 
    * onPostCreate() y el onConfigurationChanged()... 
    */ 

    @Override 
    protected void onPostCreate(Bundle savedInstanceState) { 
     super.onPostCreate(savedInstanceState); 
     onRestoreInstanceState. 
     mAccionadorDelDrawer.syncState(); 
    } 

    @Override 
    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
     mAccionadorDelDrawer.onConfigurationChanged(newConfig); 
    } 



} 

И TabFragments является фрагмент:

package com.examples.planets.fragmentos; 


import java.util.HashMap; 
import java.util.List; 
import java.util.Vector; 

import android.annotation.SuppressLint; 
import android.content.Context; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.view.ViewPager; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TabHost; 
import android.widget.TabHost.TabContentFactory; 

.... 

/** 
* @author roldan 
* 
*/ 
@SuppressLint("ValidFragment") 
public class TabsFragmentos extends Fragment implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener { 

    private TabHost mTabHost; 
    private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, TabInfo>(); 
    private TabInfo mLastTab = null; 
    private AdaptadorDePaginas mAdaptadorPaginas; 
    private ViewPager mViewPager; 


    private int posicion; 
    private FragmentManager supportFragmentManager; 
    private static Menu_Principal menu_principal; 

    public static TabsFragmentos newInstance() { 
     return new TabsFragmentos(); 
    } 


    public TabsFragmentos(){ 

    } 

    public TabsFragmentos(int position, Menu_Principal menu_principal, FragmentManager supportFragmentManager) { 
     this.posicion = position; 
     this.menu_principal = menu_principal; 
     this.supportFragmentManager = supportFragmentManager; 
    } 

    /** 
    * 
    * @author mwho 
    * 
    */ 
    private class TabInfo { 
     private String tag; 
     private Class<?> clss; 
     private Bundle args; 
     private android.support.v4.app.Fragment fragment; 
     TabInfo(String tag, Class<?> clazz, Bundle args) { 
      this.tag = tag; 
      this.clss = clazz; 
      this.args = args; 
     } 

    } 
    /** 
    * 
    * @author mwho 
    * 
    */ 
    class TabFactory implements TabContentFactory { 

     private final Context mContext; 

     /** 
     * @param context 
     */ 
     public TabFactory(Context context) { 
      mContext = context; 
     } 

     /** (non-Javadoc) 
     * @see android.widget.TabHost.TabContentFactory#createTabContent(String) 
     */ 
     public View createTabContent(String tag) { 
      View v = new View(mContext); 
      v.setMinimumWidth(0); 
      v.setMinimumHeight(0); 
      return v; 
     } 

    } 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     //int posicion = getArguments().getInt(ARGUMENTO_); 

     super.onCreate(savedInstanceState); 

     if (savedInstanceState != null) { 
      mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state 
     } 

     View rootView = null; 
     if (Menu_.MERCURY.getPosicion()== posicion){ 
      //rootView = inflater.inflate(R.layout.fragmento_palabra_bk, container, false); 
      rootView = inflater.inflate(R.layout.fragmentos_base, container, false); 



      initialiseTabHost(rootView, savedInstanceState); 

      intialiseViewPager(rootView); 

     } 
     return rootView; 
    } 

    /** (non-Javadoc) 
    * @see android.support.v4.app.FragmentActivity#onSaveInstanceState(android.os.Bundle) 
    */ 
    public void onSaveInstanceState(Bundle outState) { 
     outState.putString("tab", mTabHost.getCurrentTabTag()); //save the tab selected 
     super.onSaveInstanceState(outState); 
    } 

    /** 
    * Initializando el TabHost 
    */ 
    private void initialiseTabHost(View rootView, Bundle args) { 
     mTabHost = (TabHost)rootView.findViewById(android.R.id.tabhost); 
     //mTabHost = (TabHost)findViewById(android.R.id.tabhost); 

     mTabHost.setup(); 
     TabInfo tabInfo = null; 
     TabsFragmentos.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Buscar"), (tabInfo = new TabInfo("Tab1", TabFragmentOne.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     TabsFragmentos.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Crear"), (tabInfo = new TabInfo("Tab2", TabFragmentTwo.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 

     // Default to first tab 
     this.onTabChanged("Tab1"); 
     mTabHost.setOnTabChangedListener(this); 
    } 

    private void intialiseViewPager(View rootView) { 


     List<android.support.v4.app.Fragment> fragments = new Vector<android.support.v4.app.Fragment>(); 
     fragments.add(android.support.v4.app.Fragment.instantiate(menu_principal, TabFragmentOne.class.getName())); 
     fragments.add(android.support.v4.app.Fragment.instantiate(menu_principal, TabFragmentTwo.class.getName())); 

     this.mAdaptadorPaginas = new AdaptadorDePaginas(supportFragmentManager, fragments); 
     // 
     this.mViewPager = (ViewPager)rootView.findViewById(R.id.tabviewpager); 
     this.mViewPager.setAdapter(this.mAdaptadorPaginas); 
     this.mViewPager.setOnPageChangeListener(this); 
    } 

    /** 
    * @param activity 
    * @param tabHost 
    * @param tabSpec 
    */ 
    private static void addTab(TabsFragmentos activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) { 
     // Attach a Tab view factory to the spec 
     tabSpec.setContent(activity.new TabFactory(menu_principal)); 
     String tag = tabSpec.getTag(); 

     // Check to see if we already have a fragment for this tab, probably 
     // from a previously saved state. If so, deactivate it, because our 
     // initial state is that a tab isn't shown. 
     if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) { 
      FragmentTransaction ft = menu_principal.getSupportFragmentManager().beginTransaction(); 
      ft.detach(tabInfo.fragment); 
      ft.commit(); 
      menu_principal.getSupportFragmentManager().executePendingTransactions(); 
     } 

     tabHost.addTab(tabSpec); 
    } 

    public void onTabChanged(String tag) { 
     try{ 
     //TabInfo newTab = this.mapTabInfo.get(tag); 
     int pos = this.mTabHost.getCurrentTab(); 
     this.mViewPager.setCurrentItem(pos); 
     }catch(Exception e){} 
    } 

    @Override 
    public void onPageScrolled(int i, float v, int i2) { 

    } 

    @Override 
    public void onPageSelected(int position) { 
     // TODO Auto-generated method stub 
     this.mTabHost.setCurrentTab(position); 
    } 

    @Override 
    public void onPageScrollStateChanged(int i) { 

    } 


} 

Что проблема?

код работает нормально в первый раз ... только нажал любую опцию и покажет вкладки с вашим макетом, связанным с фрагментами TabFragmentOne или TabFragmentTwo! второй раз, этот код показывает только вкладки, но не показывает привязку макета к фрагментам TabFragmentOne или TabFragmentTwo!

Что мне делать?

Thx 4 advance.

Answer 1

Для меня проблема была в моем TabsAdapter. Единственный конструктор выглядит следующим образом:

public TabsAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager) { 
    super(activity.getSupportFragmentManager()); 
    mContext = activity; 
    mTabHost = tabHost; 
    mViewPager = pager; 
    mTabHost.setOnTabChangedListener(this); 
    mViewPager.setAdapter(this); 
    mViewPager.setOnPageChangeListener(this); 
} 

Он звонит getSupportFragmentManager, который возвращает FragmentManager, связанные с нашим FragmentActivity. Плохо. Нам нужен FM, который управляет наш текущий Fragment. Создание альтернативного (перегруженного) конструктора, который использовал getChildFragmentManager, сделал трюк.

public TabsAdapter(Fragment fragment, TabHost tabHost, ViewPager pager) { 
    super(fragment.getChildFragmentManager()); 
    mContext = fragment.getActivity(); 
    mTabHost = tabHost; 
    mViewPager = pager; 
    mTabHost.setOnTabChangedListener(this); 
    mViewPager.setAdapter(this); 
    mViewPager.setOnPageChangeListener(this); 
} 

Ваша проблема связана с одной и той же точной проблемой, только в другом формате. Замените свои звонки на getSupportFragmentManager с getChildFragmentManager в вашем Fragment.