FramentTabHost使用

继承自FragmentActivity + FragmentTabHost 布局 + Fragment 内容 1:使用findViewById 获得FragmentTabHost 对象 2:使用setup(this, getSupportFragmentManager(), R.id.realtabcontent)初始化 3:使用addTab(newTabSpec().setIndicator(),Fragment.class, null) 添加Tab标签与内容
如 :特有应用需要的Tab标签固定,且有自己的一套显示效果,那么这里完全无需TabHost布局。

另外一种:
继承自FragmentActivity + TabHost 布局 + ViewPager布局 + Fragment 内容 
 1:使用findViewById 获得TabHost 对象
2:使用setup()初始化  
		3:使用TabHost.addTab(tabSpec.setContent(DummyTabFactory));添加Tab标签与空内容             
         4:在TabHost.onTabChanged中控制ViewPager的实际显示                
 5:滑动时在ViewPager.onPageSelected 中控制Tab标签的选择。
测试了一下,以FragmentActivity + FragmentTabHost 布局 + Fragment 内容来简单介绍,直接上代码:
主activity_main.xml:
<android.support.v4.app.FragmentTabHost  
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >
         <!-- 这个布局决定了标签在上面还是在下面显示 -->
        <FrameLayout
            android:id="@+id/realtabcontent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" />
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" 
            android:gravity="center_horizontal"
            android:layout_gravity="center_horizontal"
            android:layout_weight="0"/>
         <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="0dp"
            android:layout_height="0dp" 
            android:layout_weight="0"/>
    </LinearLayout>

</android.support.v4.app.FragmentTabHost>
MainActivity:
	private FragmentTabHost mTabHost = null;

	private View indicator = null;

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

		mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
		
		mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
		// 添加tab名称和图标
		indicator = getIndicatorView("我的联系人", R.layout.mycontact_indicator);
		mTabHost.addTab(mTabHost.newTabSpec("myContact")
				.setIndicator(indicator), FirstFragment.class, null);
		// 添加tab名称和图标
		indicator = getIndicatorView("通讯录", R.layout.mycontact_indicator);
		mTabHost.addTab(mTabHost.newTabSpec("tongxun").setIndicator(indicator),
				SecondFragment.class, null);
		// 添加tab名称和图标
		indicator = getIndicatorView("特别关心", R.layout.mycontact_indicator);
		mTabHost.addTab(mTabHost.newTabSpec("care").setIndicator(indicator),
				ThirthFragment.class, null);

	}
	private View getIndicatorView(String name, int layoutId) {
		View v = getLayoutInflater().inflate(layoutId, null);
		TextView tv = (TextView) v.findViewById(R.id.tabText);
		tv.setText(name);
		return v;
	}
	@Override
	protected void onDestroy() {
		super.onDestroy();
		mTabHost=null;
	}

mycontact_indicator.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:gravity="center">

    <TextView
        android:id="@+id/tabText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="true"
        android:textColor="@drawable/selector_button_text"
        android:drawableTop="@drawable/selector_button"
        />
	
</LinearLayout>

FirstFragment:
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		TextView tv=new TextView(getActivity());
		tv.setText("第一个fragment");
		return tv;
	}
	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
	}

selector_button.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_focused="true" android:drawable="@drawable/activity_home_down"></item>
	<item android:state_selected="true" android:drawable="@drawable/activity_home_down"></item>
	<item android:drawable="@drawable/activity_home"></item>
</selector>

selector_button_text.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_focused="true" android:color="#f60"></item>
	<item android:state_selected="true" android:color="#f60"></item>
	<item android:color="#000"></item>
</selector>

结果如图所示:

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