Android编程之ActionBar Tabs用法实例分析

importandroid.app.ActionBar;

importandroid.app.Activity;

importandroid.app.FragmentTransaction;

importandroid.app.ActionBar.Tab;

importandroid.os.Bundle;

importandroid.os.CountDownTimer;

importandroid.view.MotionEvent;

importandroid.view.Window;

publicclassActionBarActivityextendsActivity {

  /** Called when the activity is first created. */

  @Override

  publicvoidonCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    //使ActionBar变得透明

    requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);

    setContentView(R.layout.main);

    finalActionBar actionBar = getActionBar();

    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // remove the activity title to make space for tabs

    actionBar.setDisplayShowTitleEnabled(false);

    AFragment aFragment =newAFragment();

    actionBar.addTab(actionBar.newTab().setText("Tab-A")

        .setTabListener(newListenerA(aFragment)));

    BFragment bFragment =newBFragment();

    actionBar.addTab(actionBar.newTab().setText("Tab-B")

        .setTabListener(newListenerB(bFragment)));

  }

  //点击显示or隐藏ActionBar

  publicbooleanonTouchEvent(MotionEvent event){

    ActionBar bar = getActionBar();

    switch(event.getAction()){

      caseMotionEvent.ACTION_UP:

        if(bar.isShowing()) bar.hide();

        elsebar.show();

        break;

      default:

          break;

    }

    returntrue;

  }

  privateclassListenerAimplementsActionBar.TabListener {

    privateAFragment mFragment;

    // Called to create an instance of the listener when adding a new tab

    publicListenerA(AFragment fragment) {

      mFragment = fragment;

    }

    publicvoidonTabSelected(Tab tab, FragmentTransaction ft) {

      ft.add(R.id.fragment, mFragment,null);

    }

    publicvoidonTabUnselected(Tab tab, FragmentTransaction ft) {

      ft.remove(mFragment);

    }

    publicvoidonTabReselected(Tab tab, FragmentTransaction ft) {

      // do nothing }

    }

  }

  privateclassListenerBimplementsActionBar.TabListener {

    privateBFragment mFragment;

    // Called to create an instance of the listener when adding a new tab

    publicListenerB(BFragment fragment) {

      mFragment = fragment;

    }

    publicvoidonTabSelected(Tab tab, FragmentTransaction ft) {

      ft.add(R.id.fragment, mFragment,null);

    }

    publicvoidonTabUnselected(Tab tab, FragmentTransaction ft) {

      ft.remove(mFragment);

    }

    publicvoidonTabReselected(Tab tab, FragmentTransaction ft) {

      // do nothing }

    }

  }

}

publicclassAFragmentextendsFragment {

  publicView onCreateView(LayoutInflater inflater, ViewGroup container,

      Bundle savedInstanceState) {

    returninflater.inflate(R.layout.alayout, container,false);

    }

}