为什么tabwidget会丢失一半？错误？

Question

以下是我的tabhost。

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@android:id/tabhost"
   android:padding="0px"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent">

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

      <FrameLayout
         android:id="@android:id/tabcontent"
         android:background="@drawable/mbg"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:layout_weight="1">
      </FrameLayout>

        <HorizontalScrollView
            android:id="@+id/horizontalScrollView1"
            android:layout_weight="0"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:scrollbars="none"> 
            <TabWidget
                android:id="@android:id/tabs"
                android:padding="0px"
                android:dividerPadding="0px"
                android:showDividers="none"
                android:layout_margin="0px"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />  
        </HorizontalScrollView>       

    </LinearLayout>
</TabHost>

以下是我的测试标签

public class tabtest extends TabActivity {
    private TabHost tabHost;
    private TabWidget tabWidget;
    Field mBottomLeftStrip;
    Field mBottomRightStrip;
    public Context thisContext;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        requestWindowFeature(Window.PROGRESS_INDETERMINATE_OFF);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.tabgroup);
        makeTab();
    }

    public void makeTab(){
        if(this.tabHost == null){
            tabHost = getTabHost();
            tabWidget = getTabWidget();
            tabHost.setup();
            tabHost.bringToFront();


            TabSpec tab1 = tabHost.newTabSpec("Tab1");
            TabSpec tab2 = tabHost.newTabSpec("Tab2");
            TabSpec tab3 = tabHost.newTabSpec("Tab3");
            TabSpec tab4 = tabHost.newTabSpec("Tab4");
            TabSpec tab5 = tabHost.newTabSpec("Tab5");
            TabSpec tab6 = tabHost.newTabSpec("Tab6");


            tab1.setIndicator("Tab1",getResources().getDrawable(R.drawable.first)).setContent(new Intent(this,IntentGroup1.class));
            tab2.setIndicator("Tab2",getResources().getDrawable(R.drawable.second)).setContent(new Intent(this,IntentGroup1.class));
            tab3.setIndicator("Tab3",getResources().getDrawable(R.drawable.third)).setContent(new Intent(this,IntentGroup1.class));
            tab4.setIndicator("Tab4",getResources().getDrawable(R.drawable.first)).setContent(new Intent(this,IntentGroup1.class));
            tab5.setIndicator("Tab5",getResources().getDrawable(R.drawable.second)).setContent(new Intent(this,IntentGroup1.class));
            tab6.setIndicator("Tab6",getResources().getDrawable(R.drawable.third)).setContent(new Intent(this,IntentGroup1.class));


            tabHost.addTab(tab1);
            tabHost.addTab(tab2);
            tabHost.addTab(tab3);
            tabHost.addTab(tab4);
            tabHost.addTab(tab5);
            tabHost.addTab(tab6);

        }
    }
}

以下是Intent的xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
</LinearLayout>

以下是IntentGroup1.class

public class IntentGroup1 extends Activity   {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ilayout1);
   }

第一次，它可以正常显示。但如果手机改为待机模式并再次唤醒，则Tab只显示一半左右。任何人都可以帮忙吗？