The specified child already has a parent. You must call removeView() on the child's parent first.

代码如下：

Resources res = getResources(); // Resource object to get Drawables

    TabHost tabHost = getTabHost();  // The activity TabHost

    TabHost.TabSpec spec;  // Resusable TabSpec for each tab

    Intent intent;  // Reusable Intent for each tab

    LinearLayout ll = (LinearLayout)tabHost.getChildAt(0);  

    tw = (TabWidget)ll.getChildAt(1);  

   

    RelativeLayout tabIndicator1 = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_indicator,tw,false);

    title = (TextView)tabIndicator1.getChildAt(1);

    icon = (ImageView)tabIndicator1.getChildAt(0);

    intent = new Intent().setClass(this, HomeActivity.class);

    title.setText("Index");

    icon.setImageResource(R.drawable.info);

    spec = tabHost.newTabSpec("Index").setIndicator(tabIndicator1).setContent(intent);

    tabHost.addTab(spec);

    intent = new Intent().setClass(this, TestActivity.class);

    title.setText("Test");

    icon.setImageResource(R.drawable.test);

    spec = tabHost.newTabSpec("Test").setIndicator(tabIndicator1).setContent(intent);

    tabHost.addTab(spec);  // 这一行报错

项目出现异常如下：

02-22 16:45:02.737: E/AndroidRuntime(6064): java.lang.RuntimeException: Unable to start activity ComponentInfo{XXXXXXX.MyTabActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1655)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1671)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread.access$1500(ActivityThread.java:117)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.os.Handler.dispatchMessage(Handler.java:99)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.os.Looper.loop(Looper.java:130)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread.main(ActivityThread.java:3694)

02-22 16:45:02.737: E/AndroidRuntime(6064): at java.lang.reflect.Method.invokeNative(Native Method)

02-22 16:45:02.737: E/AndroidRuntime(6064): at java.lang.reflect.Method.invoke(Method.java:507)

02-22 16:45:02.737: E/AndroidRuntime(6064): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)

02-22 16:45:02.737: E/AndroidRuntime(6064): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)

02-22 16:45:02.737: E/AndroidRuntime(6064): at dalvik.system.NativeStart.main(Native Method)

02-22 16:45:02.737: E/AndroidRuntime(6064): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.view.ViewGroup.addViewInner(ViewGroup.java:1998)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.view.ViewGroup.addView(ViewGroup.java:1893)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.view.ViewGroup.addView(ViewGroup.java:1850)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.view.ViewGroup.addView(ViewGroup.java:1830)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.widget.TabWidget.addView(TabWidget.java:418)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.widget.TabHost.addTab(TabHost.java:252)

02-22 16:45:02.737: E/AndroidRuntime(6064): at com.xxxx.xxxx.activity.MyTabActivity.onCreate(MyTabActivity.java:85)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

02-22 16:45:02.737: E/AndroidRuntime(6064): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1619)

02-22 16:45:02.737: E/AndroidRuntime(6064): ... 11 more

解决方法： 重新创建一个新的View

Resources res = getResources(); // Resource object to get Drawables

    TabHost tabHost = getTabHost();  // The activity TabHost

    TabHost.TabSpec spec;  // Resusable TabSpec for each tab

    Intent intent;  // Reusable Intent for each tab

    LinearLayout ll = (LinearLayout)tabHost.getChildAt(0);  

    tw = (TabWidget)ll.getChildAt(1);  

   

    RelativeLayout tabIndicator1 = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_indicator,tw,false);

    title = (TextView)tabIndicator1.getChildAt(1);

    icon = (ImageView)tabIndicator1.getChildAt(0);

    intent = new Intent().setClass(this, HomeActivity.class);

    title.setText("Index");

    icon.setImageResource(R.drawable.info);

    spec = tabHost.newTabSpec("Index").setIndicator(tabIndicator1).setContent(intent);

    tabHost.addTab(spec);

    intent = new Intent().setClass(this, TestActivity.class);

   // 添加代码：

    tabIndicator1 = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.tab_indicator,tw,false);

    title = (TextView)tabIndicator1.getChildAt(1);

    icon = (ImageView)tabIndicator1.getChildAt(0);

    title.setText("Test");

    icon.setImageResource(R.drawable.test);

    spec = tabHost.newTabSpec("Test").setIndicator(tabIndicator1).setContent(intent);

    tabHost.addTab(spec);  // 正确运行