ActionBar tab example

之前用的是TabActivity，现在用4.2，没有找到相关功能。发现还有一个ActionBar，找了一下午，发现这方面的资料好少，最基本的tab实例都没有特别清晰的解释。发现国外一个网站上有个例子很不错，网址见原文链接,翻不了的将就着看吧

共7个文件，分别是4个class（两个Fragment ，一个MainActivity，一个Listener），3个布局文件（一个main，两个fragment）

1.MainActivity.java

01	public class MainActivity extends Activity {

02

03	public static Context appContext;

04

05

@Override

06	protected void onCreate(Bundle savedInstanceState) {

07	super.onCreate(savedInstanceState);

08	setContentView(R.layout.main);

09	//ActionBar gets initiated

10	ActionBar actionbar = getActionBar();

11	//Tell the ActionBar we want to use Tabs.

12	actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

13	//initiating both tabs and set text to it.

14	ActionBar.Tab PlayerTab = actionbar.newTab().setText("Fragment A");

15	ActionBar.Tab StationsTab = actionbar.newTab().setText("Fragment B");

16	//create the two fragments we want to use for display content

17	Fragment PlayerFragment = new AFragment();

18	Fragment StationsFragment = new BFragment();

19	//set the Tab listener. Now we can listen for clicks.

20	PlayerTab.setTabListener(new MyTabsListener(PlayerFragment));

21	StationsTab.setTabListener(new MyTabsListener(StationsFragment));

22	//add the two tabs to the actionbar

23	actionbar.addTab(PlayerTab);

24	actionbar.addTab(StationsTab);

25

}

2.AFragment.java

1	public class AFragment extends Fragment {

2

3

@Override

4	public View onCreateView(LayoutInflater inflater, ViewGroup container,

5	Bundle savedInstanceState) {

6	return inflater.inflate(R.layout.afragment, container, false);

7

}

8

}

3.BFragment.java

1	public class BFragment extends Fragment{

2

3

@Override

4	public View onCreateView(LayoutInflater inflater, ViewGroup container,

5	Bundle savedInstanceState) {

6	return inflater.inflate(R.layout.bfragment, container, false);

7

}

8

}

4.MyTabsListener.java

01	public class MyTabsListener implements TabListener {

02

03	public Fragment fragment;

04

05	public MyTabsListener(Fragment fragment) {

06	this.fragment = fragment;

07

}

08

09

@Override

10	public void onTabReselected(Tab tab, FragmentTransaction ft) {

11	Toast.makeText(MainActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show();

12

}

13

14

@Override

15	public void onTabSelected(Tab tab, FragmentTransaction ft) {

16	ft.replace(R.id.fragment_container, fragment);

17

}

18

19

@Override

20	public void onTabUnselected(Tab tab, FragmentTransaction ft) {

21	ft.remove(fragment);

22

}

23

24

}

5.main.xml

01	<span class="goog_qs-tidbit goog_qs-tidbit-0"><LinearLayout

02	xmlns:android="http://schemas.android.com/apk/res/android"</span>

03	android:orientation="vertical"

04	android:layout_width="fill_parent"

05	android:layout_height="fill_parent" android:layout_gravity="center">

06

07	<LinearLayout

08	android:id="@+id/fragment_container"

09	android:layout_width="match_parent"

10	android:layout_height="match_parent" >

11	</LinearLayout>

12	</LinearLayout>

6.afragment.xml

01	<?xml version="1.0" encoding="utf-8"?>

02	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

03	android:layout_width="match_parent"

04	android:layout_height="match_parent"

05	android:orientation="vertical" >

06

07

<TextView

08	android:layout_width="match_parent"

09	android:layout_height="wrap_content"

10	android:text="1"

11

/>

12	</LinearLayout>

7.bfragment.xml

01	<?xml version="1.0" encoding="utf-8"?>

02	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

03	android:layout_width="match_parent"

04	android:layout_height="match_parent"

05	android:orientation="vertical" >

06

07

<TextView

08	android:layout_width="match_parent"

09	android:layout_height="wrap_content"

10	android:text="2"

11

/>

12	</LinearLayout>