Android: 自定义Tab样式

1.制作4个9patch的tab样式，可参考android默认的资源

tab_unselected.9.pngtab_selected.9.pngtab_press.9.pngtab_focus.9.png

这4个资源分别代表Tab的4种状态。

2.定义Tab的selector样式（就叫它tab_indicator.xml好了），将其放入drawable文件夹下，代码如下：

<? xmlversion="1.0"encoding="utf-8" ?>
< selector xmlns:android ="http://schemas.android.com/apk/res/android" >

< item android:state_focused ="false" android:state_selected ="false" android:state_pressed ="false" android:drawable ="@drawable/tab_unselected" />
< item android:state_focused ="false" android:state_selected ="true" android:state_pressed ="false" android:drawable ="@drawable/tab_selected" />

< item android:state_focused ="true" android:state_selected ="false" android:state_pressed ="false" android:drawable ="@drawable/tab_focus" />
< item android:state_focused ="true" android:state_selected ="true" android:state_pressed ="false" android:drawable ="@drawable/tab_focus" />

< item android:state_pressed ="true" android:drawable ="@drawable/tab_press" />
</ selector >

3.编写indicator的布局文件（不妨也叫tab_indicator.xml），将其放入layout文件夹下，代码如下：

<? xmlversion="1.0"encoding="utf-8" ?>
< RelativeLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="0dip"
android:layout_height ="64dip"
android:layout_weight ="1"
android:layout_marginLeft ="-3dip"
android:layout_marginRight ="-3dip"
android:orientation ="vertical"
android:background ="@drawable/tab_indicator" >
< ImageView android:id ="@+id/icon"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_centerHorizontal ="true"
/>
< TextView android:id ="@+id/title"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_alignParentBottom ="true"
android:layout_centerHorizontal ="true"
style ="?android:attr/tabWidgetStyle" mce_style ="?android:attr/tabWidgetStyle"
/>

4.接下来就是在TabActivity中使用我们自己编写的Tab样式了：

//首先获取TabWidget
mTabHost=getTabHost();
LinearLayoutll=(LinearLayout)mTabHost.getChildAt(0);
TabWidgettw=(TabWidget)ll.getChildAt(0);

然后用类似如下代码创建TabSpec，就大功告成了。

RelativeLayouttabIndicator1=(RelativeLayout)LayoutInflater.from(this).inflate(R.layout.tab_indicator,tw,false);
TextViewtvTab1=(TextView)tabIndicator1.getChildAt(1);
tvTab1.setText("tab1");
mTabHot=mTabHost.newTabSpec("TAB_1")
.setIndicator(tabIndicator1)
.setContent(contentIntent);

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