TabWidget 更改选项卡底线颜色

Question

我想更改“标签底线颜色”，我按照以下步骤操作：
1. 在我的styles.xml 文件中：

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="android:actionBarTabStyle">@style/ActionBarTabStyle.Dgrey</item>
    </style>

    <style name="ActionBarTabStyle.Dgrey" parent="@android:style/Widget.Holo.ActionBar.TabView">
        <item name="android:background">@drawable/tab_indicator_ab_dgrey</item>
    </style>

</resources>

2。在我的tab_indicator_ab_dgrey 我有：

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

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Non focused states -->
    <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected_dgrey" />
    <item android:state_focused="false" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/tab_selected_dgrey" />

    <!-- Focused states -->
    <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/tab_unselected_focused_dgrey" />
    <item android:state_focused="true" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/tab_selected_focused_dgrey" />

    <!-- Pressed -->
    <!--    Non focused states -->
    <item android:state_focused="false" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/tab_unselected_pressed_dgrey" />
    <item android:state_focused="false" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_dgrey" />

    <!--    Focused states -->
    <item android:state_focused="true" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/tab_unselected_pressed_dgrey" />
    <item android:state_focused="true" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_dgrey" />
</selector>

3。在我的可绘制文件夹（hdpi、mdpi、xhdpi、xxhdpi）中，我有这些文件：
- tab_selected_dgrey.9.png
- tab_selected_focused_dgrey.9.png
- tab_selected_pressed_dgrey.9.png
- tab_unselected_dgrey.9.png
- tab_unselected_focused_dgrey.9.png
- tab_unselected_pressed_dgrey.9.png

在我的可绘制文件夹中，我有：
tab_indicator_ab_dgrey.xml 文件

4. 最后，这是我的manifest.xml：

   <application
       android:allowBackup="true"
       android:icon="@drawable/ic_launcher"
       android:label="@string/app_name"
       android:theme="@style/AppTheme" >
       <activity
           android:name="ch.studentgrades.StudentGrades"
           android:label="@string/app_name" >
           <intent-filter>
               <action android:name="android.intent.action.MAIN" />
   
               <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
       </activity>
   </application>
   

我不知道为什么（我按照教程操作）当我运行应用程序时没有改变任何东西，标签行颜色保持蓝色。

Answer 1

answer 解决了我的问题。

设置标签后添加此代码：

TabHost host = (TabHost)view.findViewById(R.id.tab_host);
TabWidget widget = host.getTabWidget();
for(int i = 0; i < widget.getChildCount(); i++) {
    View v = widget.getChildAt(i);

    // Look for the title view to ensure this is an indicator and not a divider.
    TextView tv = (TextView)v.findViewById(android.R.id.title);
    if(tv == null) {
        continue;
    }
    v.setBackgroundResource(R.drawable.tab_indicator_ab_dgrey);
}

然后您可以从您的styles.xml 中删除以下代码：

<item name="android:actionBarTabStyle">@style/ActionBarTabStyle.Dgrey</item>

和

<style name="ActionBarTabStyle.Dgrey" parent="@android:style/Widget.Holo.ActionBar.TabView">
    <item name="android:background">@drawable/tab_indicator_ab_dgrey</item>
</style>