一个应用程序中的多个选项卡活动

Question

作为示例，请参阅以下tutorial关于如何最初设置我的选项卡。

而不是在其中一个选项卡上运行的正常活动，我想要另一个TabActivity。所以我想要做的是在TabActivity中运行一个TabActivity。我相信问题在于ID的冲突。我试图通过更改辅助活动的xml文件上的ID并在活动中手动调用这些ID来解决此问题，但没有运气。

我一直在寻找解决方案的小时，但没有提出任何建议。

Answer 1

使用应用程序的多个选项卡活动是可能的。

例如： 应用中包含一个启动器TabActivity（HomeTabActivity）具有两个选项卡：标签1和标签2

Tab 1 can be a TabActivity with two or more tabs. 
Tab 2 can be a TabActivity with two or more tabs. 

FirstTab, SecondTab, ThirdTab and FourthTab are simple activities actings as child for child of HomeTabActivity. 

xml files containing TabHost as parent element 
1. hometab.xml 
2. tab1.xml 
3. tab2.xml 

To differentiate between HomeTabActivity and Its child TabActivities i.e Tab1 and Tab2 
I have put TabWidget at top for HomeTabActivity and at bottom for Tab1 and Tab2. 

HomeTabActivity（非常第一主标签活性）：

public class HomeTabActivity extends TabActivity 
{ 
    private TabHost mTabHost = null; 
    private Intent mIntent = null; 
    private TabHost.TabSpec mTabSpec = null; 

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

    private void initializeTabs() { 
     mTabHost = getTabHost(); 

     mIntent = new Intent().setClass(this, Tab1.class); 
     mTabSpec = mTabHost 
       .newTabSpec("Tab1") 
       .setIndicator("Tab1", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 

     mIntent = new Intent().setClass(this, Tab2.class); 
     mTabSpec = mTabHost 
       .newTabSpec("Tab2") 
       .setIndicator("Tab2", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 

     mTabHost.setCurrentTab(0); 
    } 

} 

Tab1（嵌入在HomeTabActivity内部的TabActivity）：

public class Tab1 extends TabActivity 
{ 
    private TabHost mTabHost = null; 
    private Intent mIntent = null; 
    private TabHost.TabSpec mTabSpec = null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.tab1); 
     initializeTabs(); 
    } 

    private void initializeTabs() { 
     mTabHost = getTabHost(); 
     mIntent = new Intent().setClass(this, FirstTab.class); 

     mTabSpec = mTabHost 
       .newTabSpec("Tab1 Child 1") 
       .setIndicator("Tab1 Child 1", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 

     mIntent = new Intent().setClass(this, SecondTab.class); 
     mTabSpec = mTabHost 
       .newTabSpec("Tab1 Child 2") 
       .setIndicator("Tab1 Child 2", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 
     mTabHost.setCurrentTab(0); 
    } 
} 

TAB2（另一个TabActivity的HomeTabActivity内部嵌入式）：

public class Tab2 extends TabActivity 
{ 
    private TabHost mTabHost = null; 
    private Intent mIntent = null; 
    private TabHost.TabSpec mTabSpec = null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.tab2); 
     initializeTabs(); 
    } 

    private void initializeTabs() { 
     mTabHost = getTabHost(); 
     mIntent = new Intent().setClass(this, ThirdTab.class); 

     mTabSpec = mTabHost 
       .newTabSpec("Tab2 Child 1") 
       .setIndicator("Tab2 Child 1", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 

     mIntent = new Intent().setClass(this, FourthTab.class); 
     mTabSpec = mTabHost 
       .newTabSpec("Tab2 Child 2") 
       .setIndicator("Tab2 Child 2", 
         getResources().getDrawable(R.drawable.ic_launcher)) 
       .setContent(mIntent); 
     mTabHost.addTab(mTabSpec); 
     mTabHost.setCurrentTab(1); 
    } 
} 

hometab.xml

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

     <TabWidget 
      android:id="@android:id/tabs" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" > 
     </TabWidget> 

     <FrameLayout 
      android:id="@android:id/tabcontent" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" > 
     </FrameLayout> 
    </LinearLayout> 

</TabHost> 

tab1.xml和tab2.xml

<?xml version="1.0" encoding="utf-8"?> 
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@android:id/tabhost" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" > 

     <FrameLayout 
      android:id="@android:id/tabcontent" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:background="@color/androidblue" 
      android:layout_weight="1"> 
     </FrameLayout> 

     <TabWidget 
      android:id="@android:id/tabs" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="0"> 
     </TabWidget> 
    </LinearLayout> 

</TabHost>