如何根据标签栏项目启动活动？

Question

我想根据标签栏项目的点击开始不同的活动，但我在“windows class”中获得了一个空白页面作为已启动的活动。我打算做的是在点击标签栏项目上开始不同的活动。

标签栏活动课

import android.app.ActionBar; 
import android.app.Activity; 
import android.app.FragmentTransaction; 
import android.content.Intent; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.view.ViewPager; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.TabHost; 


public class TabBar extends FragmentActivity { 

    ViewPager Tab; 
    TabPagerAdapter TabAdapter; 
    ActionBar actionBar; 

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


     try { 

      TabAdapter = new TabPagerAdapter(getSupportFragmentManager()); 

      Tab = (ViewPager) findViewById(R.id.pager); 
      Tab.setOnPageChangeListener(
        new ViewPager.SimpleOnPageChangeListener() { 
         @Override 
         public void onPageSelected(int position) { 

          actionBar = getActionBar(); 
          actionBar.setSelectedNavigationItem(position); 
         } 
        }); 
      Tab.setAdapter(TabAdapter); 

      actionBar = getActionBar(); 
      //Enable Tabs on Action Bar 
      actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 
     } 
     catch (Exception e) 
     { 

     } 
     ActionBar.TabListener tabListener = new ActionBar.TabListener(){ 

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

      } 

      @Override 
      public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) { 

       Tab.setCurrentItem(tab.getPosition()); 
      } 

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

      }}; 


     //Add New Tab 
     actionBar.addTab(actionBar.newTab().setText("Home").setTabListener(tabListener)); 
     actionBar.addTab(actionBar.newTab().setText("Celeb").setTabListener(tabListener)); 
     actionBar.addTab(actionBar.newTab().setText("Videos").setTabListener(tabListener)); 


    } 

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

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

TabPagerAdapter

import android.content.Intent; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentStatePagerAdapter; 

public class TabPagerAdapter extends FragmentStatePagerAdapter { 
    public TabPagerAdapter(FragmentManager fm) { 
     super(fm); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public Fragment getItem(int i) { 
     switch (i) { 
     case 0: 
      //Fragement for Android Tab 

      return new Android(); 
     case 1: 
      //Fragment for Ios Tab 
      return new Ios(); 
     case 2: 
      //Fragment for Windows Tab 
      return new Windows(); 
     } 
     return null; 

    } 

    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     return 3; //No of Tabs 
    } 


    } 

的Windows

public class Windows extends Fragment { 
    @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
       Bundle savedInstanceState) { 

      View windows = inflater.inflate(R.layout.feed_main, container, false); 
      //((TextView)windows.findViewById(R.id.textView)).setText("Windows"); 
      return windows; 
}} 

Answer 1

要回答你，你实际上并没有开始一个活动，您通过碎片开关，片段只是一个自定义视图，你膨胀一个XML来表示自定义视图的片段，如果你想开始一个活动被选中后，你的选项卡，然后调用startActivity(Intent);startActivity(new Intent(classname.this,the_class_i_want_to_start.class));

和你Windows类扩展Fragment它应该是Activity如果你想要的是Fragment那么你是不是有问题

功能

希望其清醒