Android: 自定义Tab样式
16lz
2021-01-23
1.制作4个9patch的tab样式，可参考android默认的资源
tab_unselected.9.png 
tab_selected.9.png 
tab_press.9.png 
tab_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：
1 <? xml version="1.0" encoding="utf-8" ?>
2 < selector xmlns:android ="http://schemas.android.com/apk/res/android" >
3 <!-- Non focused states -->
4 < item android:state_focused ="false" android:state_selected ="false" android:state_pressed ="false" android:drawable ="@drawable/tab_unselected" />
5 < item android:state_focused ="false" android:state_selected ="true" android:state_pressed ="false" android:drawable ="@drawable/tab_selected" />
6 <!-- Focused states -->
7 < item android:state_focused ="true" android:state_selected ="false" android:state_pressed ="false" android:drawable ="@drawable/tab_focus" />
8 < item android:state_focused ="true" android:state_selected ="true" android:state_pressed ="false" android:drawable ="@drawable/tab_focus" />
9 <!-- Pressed -->
10 < item android:state_pressed ="true" android:drawable ="@drawable/tab_press" />
11 </ 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：
1 <? xml version="1.0" encoding="utf-8" ?>
2 < RelativeLayout xmlns:android ="http://schemas.android.com/apk/res/android"
3 android:layout_width ="0dip"
4 android:layout_height ="64dip"
5 android:layout_weight ="1"
6 android:layout_marginLeft ="-3dip"
7 android:layout_marginRight ="-3dip"
8 android:orientation ="vertical"
9 android:background ="@drawable/tab_indicator" >
10 < ImageView android:id ="@+id/icon"
11 android:layout_width ="wrap_content"
12 android:layout_height ="wrap_content"
13 android:layout_centerHorizontal ="true"
14 />
15 < TextView android:id ="@+id/title"
16 android:layout_width ="wrap_content"
17 android:layout_height ="wrap_content"
18 android:layout_alignParentBottom ="true"
19 android:layout_centerHorizontal ="true"
20 style ="?android:attr/tabWidgetStyle" mce_style ="?android:attr/tabWidgetStyle"
21 />
4.接下来就是在TabActivity中使用我们自己编写的Tab样式了：
1 // 首先获取TabWidget
2 mTabHost = getTabHost();
3 LinearLayout ll = (LinearLayout)mTabHost.getChildAt(0);
4 TabWidget tw = (TabWidget)ll.getChildAt(0);
然后用类似如下代码创建TabSpec，就大功告成了。
1 RelativeLayout tabIndicator1 = (RelativeLayout) LayoutInflater.from( this ).inflate(R.layout.tab_indicator, tw, false );
2 TextView tvTab1 = (TextView)tabIndicator1.getChildAt( 1 );
3 tvTab1.setText( " tab1 " );
4 mTabHot = mTabHost.newTabSpec( " TAB_1 " )
5 .setIndicator(tabIndicator1)
6 .setContent(contentIntent);
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