Comment puis-je cliquer sur le deuxième onglet de ce projet par programme sous Android?

Question

Je veux juste cliquer sur le deuxième onglet de ce projet par programme. Comment puis je faire ça?

Voici mon code:

activity_main.xml

<android.support.design.widget.CoordinatorLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    <android.support.design.widget.AppBarLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:background="?attr/colorPrimary" 
      app:layout_scrollFlags="scroll|enterAlways" 
      app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /> 

     <android.support.design.widget.TabLayout 
      android:id="@+id/tabs" 
      android:layout_width="match_parent" 
      android:layout_height="@dimen/custom_tab_layout_height" 
      app:tabMode="fixed" 
      app:tabGravity="fill"/> 
    </android.support.design.widget.AppBarLayout> 
    <android.support.v4.view.ViewPager 
     android:id="@+id/viewpager" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     xmlns:ads="http://schemas.android.com/apk/res-auto" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 
</android.support.design.widget.CoordinatorLayout> 

layout_first.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" 
    android:orientation="horizontal" 
    android:focusable="true" 
    android:background="#bc8383" 
    android:id="@+id/content_frame"> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Show Second" 
     android:id="@+id/btnShowSecond" 
     android:layout_weight="0.18" /> 

    <EditText 
     android:id="@+id/et1" 
     android:text="et1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:background="#000000" 
     android:elegantTextHeight="false" 
     android:maxLength="20" 
     android:singleLine="true" 
     android:textAlignment="center" 
     android:textColor="#85b27e" 
     android:textSize="40dp" 
     android:paddingLeft="3dp" 
     android:paddingRight="3dp" 
     android:layout_marginTop="10dp" 
     android:layout_weight="1" /> 
</LinearLayout> 

layout_second.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" 
    android:orientation="vertical" 
    android:focusable="true" 
    android:background="#bc8383"> 

    <EditText 
     android:id="@+id/et2" 
     android:text="et2" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:background="#000000" 
     android:elegantTextHeight="false" 
     android:maxLength="20" 
     android:singleLine="true" 
     android:textAlignment="center" 
     android:textColor="#85b27e" 
     android:textSize="40dp" 
     android:paddingLeft="3dp" 
     android:paddingRight="3dp" 
     android:layout_marginTop="10dp" 
     android:layout_gravity="center_horizontal" /> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="btn2" 
     android:id="@+id/btn2" 
     android:layout_gravity="center_horizontal" /> 
</LinearLayout> 

custom_tab.xml

<?xml version="1.0" encoding="utf-8"?> 
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/tab" 
    android:textColor="@color/colorAccent" 
    android:textSize="14dp" 
    android:gravity="center" 
    android:fontFamily="@string/font_fontFamily_medium"/> 

MainActivity.java

package xmaxsoft.delfragment; 

import android.os.Bundle; 
import android.support.design.widget.TabLayout; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.LayoutInflater; 
import android.widget.TextView; 
import java.util.ArrayList; 
import java.util.List; 

public class MainActivity extends AppCompatActivity { 
    private Toolbar toolbar; 
    private TabLayout tabLayout; 
    private ViewPager viewPager; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     viewPager = (ViewPager) findViewById(R.id.viewpager); 
     setupViewPager(viewPager); 
     tabLayout = (TabLayout) findViewById(R.id.tabs); 
     tabLayout.setupWithViewPager(viewPager); 
     setupTabIcons(); 
    } 

    private void setupTabIcons() { 
     TextView tabOne = (TextView) LayoutInflater.from(this).inflate(R.layout.custom_tab, null); 
     tabOne.setText("One"); 
     tabLayout.getTabAt(0).setCustomView(tabOne); 

     TextView tabTwo = (TextView) LayoutInflater.from(this).inflate(R.layout.custom_tab, null); 
     tabTwo.setText("Two"); 
     tabLayout.getTabAt(1).setCustomView(tabTwo); 
    } 

    private void setupViewPager(ViewPager viewPager) { 
     ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager()); 
     adapter.addFrag(new First(), "One"); 
     adapter.addFrag(new Second(), "Two"); 
     viewPager.setAdapter(adapter); 
    } 

    class ViewPagerAdapter extends FragmentPagerAdapter { 
     private final List<Fragment> mFragmentList = new ArrayList<>(); 
     private final List<String> mFragmentTitleList = new ArrayList<>(); 

     public ViewPagerAdapter(FragmentManager manager) { 
      super(manager); 
     } 

     @Override 
     public Fragment getItem(int position) { 
      return mFragmentList.get(position); 
     } 

     @Override 
     public int getCount() { 
      return mFragmentList.size(); 
     } 

     public void addFrag(Fragment fragment, String title) { 
      mFragmentList.add(fragment); 
      mFragmentTitleList.add(title); 
     } 

     @Override 
     public CharSequence getPageTitle(int position) { 
      return mFragmentTitleList.get(position); 
     } 
    } 
} 

Second.java

package xmaxsoft.delfragment; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.EditText; 

public class Second extends Fragment { 
    public Second() { 
    } 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     final View view = inflater.inflate(R.layout.layout_second, container, false); 

     return view; 
    } 
} 

First.java

package xmaxsoft.delfragment; 
import android.os.Bundle; 
import android.support.design.widget.TabLayout; 
import android.support.v4.app.Fragment; 
import android.support.v4.view.ViewPager; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.EditText; 

public class First extends Fragment { 
    public First() { 
    } 

    Button btnShowSecond; 
    EditText et1; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     final View view = inflater.inflate(R.layout.layout_first, container, false); 
     btnShowSecond = (Button) view.findViewById(R.id.btnShowSecond); 
     et1 = (EditText) view.findViewById(R.id.et1); 
     btnShowSecond.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
      //what kind of code must be here ??? 
      //what kind of code must be here ??? 
      //what kind of code must be here ??? 
      } 
     }); 
     return view; 
    } 
} 

Comment puis-je cliquer sur l'onglet deuxième programme? Merci pour les aides.

Answer 1

Vous devriez essayer quelque chose comme ça

tabLayout.getTabAt(1).setSelected(true); 

Je ne l'ai pas essayé, mais cela devrait fonctionner.

Hope this helps :)