Android ActionBar Tabs学习笔记

     <p><span style="color:#ff0000;">本例主要实现用Tab切换不同的Fragment，点击View显示or隐藏ActionBar，把ActionBar 设为透明，使界面更加友好，详细代码见资源里的ActionBarTabs。</span></p>    <p>ActionBar Tab主要用于Fragment之间的切换，其必须要设置ActionBar.TabListener，详细代码如下ActionBarActivity.java：</p>    <pre class="brush:java; toolbar: true; auto-links: false;">import android.app.ActionBar; import android.app.Activity; import android.app.FragmentTransaction; import android.app.ActionBar.Tab; import android.os.Bundle; import android.os.CountDownTimer; import android.view.MotionEvent; import android.view.Window;  public class ActionBarActivity extends Activity {  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   //使ActionBar变得透明   requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);   setContentView(R.layout.main);    final ActionBar actionBar = getActionBar();   actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);   // remove the activity title to make space for tabs   actionBar.setDisplayShowTitleEnabled(false);    AFragment aFragment = new AFragment();    actionBar.addTab(actionBar.newTab().setText("Tab-A")                 .setTabListener(new ListenerA(aFragment)));       BFragment bFragment = new BFragment();    actionBar.addTab(actionBar.newTab().setText("Tab-B")                 .setTabListener(new ListenerB(bFragment)));  }  //点击显示or隐藏ActionBar  public boolean onTouchEvent(MotionEvent event){   ActionBar bar = getActionBar();   switch(event.getAction()){    case MotionEvent.ACTION_UP:     if(bar.isShowing()) bar.hide();     else bar.show();     break;    default:      break;   }   return true;  }    private class ListenerA implements ActionBar.TabListener {   private AFragment mFragment;   // Called to create an instance of the listener when adding a new tab   public ListenerA(AFragment fragment) {    mFragment = fragment;   }   public void onTabSelected(Tab tab, FragmentTransaction ft) {    ft.add(R.id.fragment, mFragment, null);   }   public void onTabUnselected(Tab tab, FragmentTransaction ft) {    ft.remove(mFragment);   }   public void onTabReselected(Tab tab, FragmentTransaction ft) {    // do nothing }   }  }   private class ListenerB implements ActionBar.TabListener {   private BFragment mFragment;    // Called to create an instance of the listener when adding a new tab   public ListenerB(BFragment fragment) {    mFragment = fragment;   }    public void onTabSelected(Tab tab, FragmentTransaction ft) {    ft.add(R.id.fragment, mFragment, null);   }    public void onTabUnselected(Tab tab, FragmentTransaction ft) {    ft.remove(mFragment);   }    public void onTabReselected(Tab tab, FragmentTransaction ft) {    // do nothing }   }  } }</pre>    <p></p> 其中涉及到两个Fragment，在前面Fragment的笔记中讲过，这里就不再赘述。类AFragment实现如下，BFragment实现与这类似：    <pre class="brush:java; toolbar: true; auto-links: false;">public class AFragment extends Fragment {  public View onCreateView(LayoutInflater inflater, ViewGroup container,     Bundle savedInstanceState) {           return inflater.inflate(R.layout.alayout, container, false);      }  }</pre>    <p>文章出处：<a href="/misc/goto?guid=4959499320874291413" rel="nofollow">http://blog.csdn.net/flying_tao/article/details/6615171</a></p>