我正在使用操作欄選項卡，我想從一個活動切換到另一個活動，我如何在標籤頁中調用活動

Question

//我在應用程序中使用操作欄選項卡，我想從一個活動切換到當我按下標籤頁時，在標籤頁中顯示另一個活動，我如何在標籤頁中調用該活動。我想在操作欄選項卡中顯示任何活動。

  public class MainActivity extends Activity implements TabListener { 
       // Refresh menu item 
       private MenuItem action_search; 

       Tab tab1, tab2, tab3; 

       @Override 
       protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
      //creating tabs 
        ActionBar actionBar = getActionBar(); 
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 

    //adding tabs to actionbar 
        tab1 = actionBar.newTab(); 
        tab1.setText("camera"); 
        tab1.setTabListener(this); 
        actionBar.addTab(tab1); 

        tab2 = actionBar.newTab(); 
        tab2.setText("contacts"); 
        tab2.setTabListener(this); 
        actionBar.addTab(tab2); 



       } 




       @Override 
       public void onTabReselected(Tab tab, FragmentTransaction ft) { 
        // TODO Auto-generated method stub 

       } 

       @TargetApi(Build.VERSION_CODES.HONEYCOMB) 
       @Override 
       public void onTabSelected(Tab tab, FragmentTransaction ft) { 
        // TODO Auto-generated method stub 
        switch (tab.getPosition()) { 
        case 0: 
         Intent i = new Intent(getApplicationContext(), MainActivity2.class); 
         startActivity(i); 

         break; 

        case 1: 



         Intent i = new Intent(getApplicationContext(), MainActivity2.class); 
         startActivity(i); 

         break; 

        } 
       } 



       @Override 
       public void onTabUnselected(Tab tab, FragmentTransaction ft) { 
        // TODO Auto-generated method stub 

       } 

      } 

Answer 1

MainActivity.java

package com.example.moviesswipe; 

import android.annotation.SuppressLint; 
import android.app.ActionBar; 
import android.app.ActionBar.Tab; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.view.ViewPager; 
import android.view.Menu; 

@SuppressWarnings("unused") 
@SuppressLint("NewApi") 
public class MainActivity extends FragmentActivity implements 
     ActionBar.TabListener { 

    private ViewPager viewPager; 
    private TabsPagerAdapter mAdapter; 
    private ActionBar actionBar; 

    private String[] tabs = { "English", "Tamil", "Hindi" }; 

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

     viewPager = (ViewPager) findViewById(R.id.pager); 
     actionBar = getActionBar(); 
     mAdapter = new TabsPagerAdapter(getSupportFragmentManager()); 

     viewPager.setAdapter(mAdapter); 
     actionBar.setHomeButtonEnabled(false); 
     actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 

     for (String tab_name : tabs) { 
      actionBar.addTab(actionBar.newTab().setText(tab_name) 
        .setTabListener(this)); 
     } 

     viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { 

      @Override 
      public void onPageSelected(int position) { 

       actionBar.setSelectedNavigationItem(position); 
      } 

      @Override 
      public void onPageScrolled(int arg0, float arg1, int arg2) { 
      } 

      @Override 
      public void onPageScrollStateChanged(int arg0) { 
      } 
     }); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    @Override 
    public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) { 
     // TODO Auto-generated method stub 

    } 

    @Override 
    public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) { 
     // TODO Auto-generated method stub 
     viewPager.setCurrentItem(tab.getPosition()); 
    } 

    @Override 
    public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) { 
     // TODO Auto-generated method stub 

    } 

} 

TabsPagerAdapter.java

package com.example.moviesswipe; 

import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 

public class TabsPagerAdapter extends FragmentPagerAdapter { 

    public TabsPagerAdapter(FragmentManager fm) { 
     super(fm); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public Fragment getItem(int index) { 

     switch (index) { 
     case 0: 

      return new English(); 
     case 1: 

      return new Tamil(); 
     case 2: 

      return new Hindi(); 
     } 
     return null; 
    } 

    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     return 3; 
    } 

} 

在這裏，我放置三個標籤，對於i創建了三個活動的每個標籤。 English.java，Tamil.java和Hindi.java

樣本之一：

package com.example.moviesswipe; 

import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


@SuppressWarnings("unused") 
public class English extends Fragment{ 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View rootView = inflater.inflate(R.layout.english, container, false); 

     return rootView; 
    } 



} 

對於每一個你需要創建一個佈局類：在你的清單堂妹

無需進入這些類這些都是碎片。

嘗試像這樣的花花公子:)快樂編碼:)

說，如果有任何疑問。