After Android.support.v4.app.fragmentation tabhost is added, running prompts the project to stop running.

  android, question

<? xml version=”1.0″ encoding=”utf-8″? >
<LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context="com.example.administrator.myapplication.MainActivity">
 
 <FrameLayout
 Android:id="@ plus id/contentLayout "
 android:layout_width="match_parent"
 android:layout_height="0dp"
 android:layout_weight="1"
 tools:ignore="InefficientWeight">
 
 </FrameLayout>

<android.support.v4.app.FragmentTabHost

android:id="@android:id/tabhost"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="#F6F6F6">
 <FrameLayout
 android:id="@android:id/tabcontent"
 android:layout_width="0dp"
 android:layout_height="0dp"/>

</android.support.v4.app.FragmentTabHost>
</LinearLayout>
I have just started to contact Android development. After the tag Android.support.v4.app.fragmentation tabhost is added to the project, the test run project will prompt the project to stop running. After the tag Android.support.v4.app.fragmentation tabhost is deleted, the project will be able to run normally. May I ask the great gods, what is the problem? Thank you

Has your activity inherited from the FragmentActivity activity?