FragmentTabhost用法，运行报错

activity_main.xml----------------------/
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<FrameLayout
    android:id="@+id/activity_home_container"
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="1"></FrameLayout>

<android.support.v4.app.FragmentTabHost
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="#009999"></TabWidget>

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="0dp"
        android:layout_height="0dp"></FrameLayout>
</android.support.v4.app.FragmentTabHost>

--------------------------------------------------/
MainActivity.class-----------------------------/
public class MainActivity extends FragmentActivity {
private static final String TAB_CHAT = "chat";
private FragmentTabHost tabhost;

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

    // 1. 初始化TabHost
    tabhost = (FragmentTabHost) findViewById(android.R.id.tabhost);
    tabhost.setup(this, getSupportFragmentManager(),
            R.id.activity_home_container);

    // 2、新建TabSpec
    TabHost.TabSpec spec = tabhost.newTabSpec(TAB_CHAT);
    spec.setIndicator("消息");

    //3、添加TabSpec
    tabhost.addTab(spec,MyFragment.class,null);
}

}

运行不了，直接报错，求大神
11-03 03:58:18.350 1801-1801/? E/ActivityThread﹕ Service com.android.email.service.EmailBroadcastProcessorService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@23e60f46 that was originally bound here
android.app.ServiceConnectionLeaked: Service com.android.email.service.EmailBroadcastProcessorService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@23e60f46 that was originally bound here
at android.app.LoadedApk$ServiceDispatcher.(LoadedApk.java:1077)
at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:971)
at android.app.ContextImpl.bindServiceCommon(ContextImpl.java:1782)
at android.app.ContextImpl.bindService(ContextImpl.java:1765)
at android.content.ContextWrapper.bindService(ContextWrapper.java:539)
at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:181)
at com.android.emailcommon.service.ServiceProxy.test(ServiceProxy.java:224)
at com.android.email.service.EmailServiceUtils.isServiceAvailable(EmailServiceUtils.java:160)
at com.android.email.provider.AccountReconciler.reconcileAccountsInternal(AccountReconciler.java:171)
at com.android.email.provider.AccountReconciler.reconcileAccounts(AccountReconciler.java:115)
at com.android.email.service.EmailBroadcastProcessorService.reconcileAndStartServices(EmailBroadcastProcessorService.java:305)
at com.android.email.service.EmailBroadcastProcessorService.onBootCompleted(EmailBroadcastProcessorService.java:295)
at com.android.email.service.EmailBroadcastProcessorService.onHandleIntent(EmailBroadcastProcessorService.java:130)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)

你好，我也遇到了这个问题，请问你解决了吗