i mettre en œuvre une tabhost mais ne veulent pas que Apparaître après l'exécution

Question

je tente de passer de mon activité principale (écran de connexion) à l'écran connecté (après la connexion). J'ai construit mon tabhost simple mais il ne veut pas apparaître si je commence le programme. où est mon erreur?

import android.os.Bundle; 
     import android.support.v7.app.AppCompatActivity; 
     import android.view.View; 
     import android.widget.Button; 
     import android.widget.EditText; 

public class MainActivity extends AppCompatActivity { 
    // Fragment TabHost as mTabHost 
    EditText text; 
    Button login; 
    EditText password; 
    String username; 
    String pw; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     text = (EditText) findViewById(R.id.editText); 
     login = (Button) findViewById(R.id.button); 
     password = (EditText) findViewById(R.id.editText2); 


     login.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View view){ 
       username =text.getText().toString(); 
       pw= password.getText().toString(); 
       System.out.println(text.getText().toString()); 
       System.out.println(password.getText().toString()); 

       if(username.equals("test") && pw.equals("test")){ 
        setContentView(R.layout.logged); 
       }else{ 
        System.out.println("Fail"); 
       } 

      } 

     }); 


    } 


} 

logged.class

import android.os.Build; 
import android.support.v4.app.FragmentActivity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TabHost; 
import android.widget.TabWidget; 

import java.util.zip.Inflater; 

/** 
* Created by saddam on 04.07.2017. 
*/ 

public class logged extends FragmentActivity { 
    TabHost tabHost; 
    TabWidget tw; 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Build savedInstanceState) { 

     View v = inflater.inflate(R.layout.logged,container,false); 

     TabHost host = (TabHost)findViewById(R.id.tabHost); 
     host.setup(); 

     //Tab 1 
     TabHost.TabSpec spec = host.newTabSpec("Tab One"); 
     spec.setContent(R.id.tab1); 
     spec.setIndicator("Tab One"); 
     host.addTab(spec); 

     //Tab 2 
     spec = host.newTabSpec("Tab Two"); 
     spec.setContent(R.id.tab2); 
     spec.setIndicator("Tab Two"); 
     host.addTab(spec); 

     //Tab 3 
     spec = host.newTabSpec("Tab Three"); 
     spec.setContent(R.id.tab3); 
     spec.setIndicator("Tab Three"); 
     host.addTab(spec); 
     return v; 
    } 
} 

logged.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" 
    tools:context=".MainActivity"> 

    <TabHost 
     android:id="@+id/tabHost" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_alignParentTop="true" 
     android:layout_centerHorizontal="true"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:orientation="vertical"> 

      <TabWidget 
       android:id="@android:id/tabs" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content"></TabWidget> 

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

       <LinearLayout 
        android:id="@+id/tab1" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:background="#ffc916" 
        android:orientation="vertical"> 

        <TextView 
         android:layout_width="match_parent" 
         android:layout_height="match_parent" 
         android:text="This is tab 1" /> 

       </LinearLayout> 

       <LinearLayout 
        android:id="@+id/tab2" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:background="#da8200" 
        android:orientation="vertical"> 

        <TextView 
         android:layout_width="match_parent" 
         android:layout_height="match_parent" 
         android:text="This is tab 2" /> 
       </LinearLayout> 

       <LinearLayout 
        android:id="@+id/tab3" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:background="#5b89ff" 
        android:orientation="vertical"> 

        <TextView 
         android:layout_width="match_parent" 
         android:layout_height="match_parent" 
         android:text="This is tab 3" /> 
       </LinearLayout> 
      </FrameLayout> 
     </LinearLayout> 
    </TabHost> 

Answer 1

Comment utiliser TabHost s'il vous plaît vérifier cet exemple complet, il est très utile pour vous http://www.technotalkative.com/android-tab-bar-example-1/