ViewPagerでフラグメントを別のものに置き換えます。

Question

ViewPagerで別のフラグメントに置き換えるときに問題があります。

• 私は5ページのViewPagerを持っていますが、それぞれがFragmentです。最初のページでは、私はリサイクル・ビューを持っています。そのrecyclerviewの項目をクリックすると、そのイベントを処理するためにaddOnItemTouchListenerメソッドを使用します。
• recyclerviewの項目をクリックすると、Fragment（categoryFragment）を別のFragment（ "sub_category"）に置き換えます。

CODE

ShopPanel活性（ViewPagerとTabLayoutを含む）

ShopPanel.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:orientation="vertical" 
tools:context="com.hyperfresh.sorooshpardaz.hyperfreshcustomer.ShopPanel"> 
<android.support.v7.widget.Toolbar 
    android:layout_width="match_parent" 
    android:layout_height="70dp" 
    android:background="@drawable/toolbarshop"> 
</android.support.v7.widget.Toolbar> 
<android.support.v4.view.ViewPager 
    android:id="@+id/view_pager" 
    android:layout_width="match_parent" 
    android:layout_height="0dp" 
    android:layout_weight="1"/> 
<android.support.design.widget.TabLayout 
    android:id="@+id/tab_layout" 
    style="@style/AppTabLayout" 
    android:layout_width="match_parent" 
    android:layout_height="56dp" 
    android:background="@color/white" 
    app:tabGravity="fill"/></LinearLayout> 

ShopPanel.java

public class ShopPanel extends AppCompatActivity { 

private TabLayout mTabLayout; 

private int[] mTabsIcons = { 
     R.drawable.menux, 
     R.drawable.search, 
     R.drawable.favorites, 
     R.drawable.gift, 
     R.drawable.home 
}; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_shop_panel); 


    final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager); 
    final MyPagerAdapter pagerAdapter = new MyPagerAdapter(getSupportFragmentManager()); 
    if (viewPager != null) 
     viewPager.setAdapter(pagerAdapter); 
    // viewPager.setCurrentItem(pagerAdapter.PAGE_COUNT-2,false); 
    mTabLayout = (TabLayout) findViewById(R.id.tab_layout); 


    if (mTabLayout != null) { 
     mTabLayout.setupWithViewPager(viewPager); 

     for (int i = 0; i < mTabLayout.getTabCount(); i++) { 
      TabLayout.Tab tab = mTabLayout.getTabAt(i); 
      if (tab != null) 
       tab.setCustomView(pagerAdapter.getTabView(i)); 
     } 

     mTabLayout.getTabAt(0).getCustomView().setSelected(true); 
    } 

    viewPager.post(new Runnable() { 
     @Override 
     public void run() { 
      viewPager.setCurrentItem(0); 

     } 
    }); 

} 
private class MyPagerAdapter extends FragmentPagerAdapter { 

    public final int PAGE_COUNT = 5; 

    private final String[] mTabsTitle = {"Menu","Search","Favorites","Gift","Home"}; 

    public MyPagerAdapter(FragmentManager fm) { 
     super(fm); 
    } 

    public View getTabView(int position) { 
     // Given you have a custom layout in `res/layout/custom_tab.xml` with a TextView and ImageView 
     View view = LayoutInflater.from(ShopPanel.this).inflate(R.layout.custom_tab, null); 
     TextView title = (TextView) view.findViewById(R.id.title); 
     title.setText(mTabsTitle[position]); 
     ImageView icon = (ImageView) view.findViewById(R.id.icon2); 
     icon.setImageResource(mTabsIcons[position]); 
     return view; 
    } 

    @Override 
    public Fragment getItem(int pos) { 
     switch (pos) { 

      case 0: 
       categoryFragment category = new categoryFragment(); 
       return category; 
      case 1: 
       searchFragment search = new searchFragment(); 
       return search; 
      case 2: 
       favoritesFragment favorites = new favoritesFragment(); 
       return favorites; 
      case 3: 
       giftFragment gift = new giftFragment(); 
       return gift; 
      case 4: 
       homeFragment home = new homeFragment(); 
       return home; 
     } 
     return null; 
    } 

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

    @Override 
    public CharSequence getPageTitle(int position) { 
     return mTabsTitle[position]; 
    } 


}} 

categoryFr最初の断片

public class categoryFragment extends Fragment { 
private static final String REGISTER_URL = "http://torshiforoosh.ir/service/category.php"; 
List<categoryModel> categoryModelList; 
AutofitRecyclerView re; 
private final static String TAG = "categoryFragment"; 

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.category, container, false); 
    re = (AutofitRecyclerView) view.findViewById(R.id.re); 
    //StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL); 
    //GridLayoutManager gridLayoutManager = new GridLayoutManager(getActivity(),2); 
    re.addItemDecoration(new MarginDecoration(getActivity())); 
    re.setHasFixedSize(true); 
    re.setItemAnimator(new DefaultItemAnimator()); 
    updatelist(); 
    re.addOnItemTouchListener(new RecyclerItemClickListener(getContext(), new RecyclerItemClickListener.OnItemClickListener() { 
     @Override public void onItemClick(View view, int position) { 
      //startActivity(new Intent(getActivity(), delivery.class)); 
      //sub_category sub_category = new sub_category(); 
      FragmentManager fragMgr = getFragmentManager(); 
      FragmentTransaction ft = fragMgr.beginTransaction(); 
      ft.addToBackStack(null); 
      ft.replace(R.id.view_pager, new sub_category(), TAG); 
      ft.commit(); 
     } 
    })); 
    return view; 
} 

private void updatelist() { 
    StringRequest stringRequest = new StringRequest(Request.Method.GET, REGISTER_URL, 
      new Response.Listener<String>() { 
       @Override 
       public void onResponse(String response) { 
        categoryModelList = categoryParser.parseFeedCategory(response); 
        categoryAdapter categoryAdapter = new categoryAdapter(categoryModelList,getActivity().getApplicationContext()); 

        re.setAdapter(categoryAdapter); 
       } 
      }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError volleyError) { 
      Toast.makeText(getActivity(),"اینترنت خود را چک کنید",Toast.LENGTH_SHORT).show(); 
     } 
    }); 
    RequestQueue queue = Volley.newRequestQueue(getActivity()); 
    queue.add(stringRequest); 
}} 

リサイクルビューアイテムをクリックすると、最初のページに白い図が表示されます。

Answer 1

あなたは、フラグメントレイアウトでframeLayoutに追加して

 FragmentManager fragMgr = getFragmentManager(); 
     FragmentTransaction ft = fragMgr.beginTransaction(); 
     ft.addToBackStack(null); 
     ft.replace(R.id.view_pager, new sub_category(), TAG); 
     ft.commit(); 

を置き換えることができます：致命的な例外：メインをクリックrecyclerview項目がアプリを停止し、次のエラーを与えるとき、私はでframeLayout作成しても

getChildFragmentManager().beginTransaction().add(*frameLayout ID* , new sub_category(), tag).commit();