底部導航欄不能在裏面工作片段

Question

我想顯示一個片段內的3個項目的底部導航欄，它在我的代碼中沒有錯誤地正確顯示。但問題是，當我點擊其中一個選項時，應該運行的代碼不起作用，甚至不會在控制檯上記錄任何內容。

TransporteFragment.Java：

import android.os.Bundle; 
import android.support.annotation.NonNull; 
import android.support.design.widget.BottomNavigationView; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.view.LayoutInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 


/** 
* A simple {@link Fragment} subclass. 
*/ 
public class TransporteFragment extends Fragment { 


    public TransporteFragment() { 
     // Required empty public constructor 
    } 

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener 
      = new BottomNavigationView.OnNavigationItemSelectedListener() { 

     @Override 
     public boolean onNavigationItemSelected(@NonNull MenuItem item) { 
      switch (item.getItemId()) { 
       case R.id.action_busC1: 

        return true; 
       case R.id.action_busC2: 
        BusC2Fragment busC2Fragment = new BusC2Fragment(); 
        FragmentManager fragmentManager = getChildFragmentManager(); 
        fragmentManager.beginTransaction().replace(R.id.espacioLineas, busC2Fragment).commit(); 
        return true; 
       case R.id.action_busC3: 

        return true; 
      } 
      return false; 
     } 

    }; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     final View v = inflater.inflate(R.layout.fragment_transporte, container, false); 

     BottomNavigationView navegacion = (BottomNavigationView) v.findViewById(R.id.navbartransporte); 
     navegacion.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener); 


     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.fragment_transporte, container, false); 
    } 

} 

fragment_transporte.xml：

<RelativeLayout 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" 
    tools:context="com.gberti.smarthuesca.TransporteFragment"> 



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

    </FrameLayout> 
    <android.support.design.widget.BottomNavigationView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:app="http://schemas.android.com/apk/res-auto" 
     android:id="@+id/navbartransporte" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="bottom" 
     android:layout_alignParentBottom="true" 
     android:background="@color/white" 
     app:menu="@menu/navbar_transporte_items" /> 
</RelativeLayout> 

謝謝。

Answer 1

在你onCreateView方法，而不是return inflater.inflate(R.layout.fragment_transporte, container, false);嘗試return v;