How to implement double TapActivity in android?

Question

Hi

I want to make an android application which has two tap in one view ,i.e, has upper tab and lower tab.

According to selection of lower tab, I add the new tab host(for upper tab) in the tapcontent part of lower tab. But, upper tap doesn't go up, it stick to the lower tab.

The implementation of upper tab is,

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;



 public class uppertab extends TabActivity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);

  setContentView(R.layout.upperlayout);

  TabHost tabHost = getTabHost();
  TabHost.TabSpec spec;
  Intent intent;

  intent = new Intent().setClass(this, recommend_friend_simillar.class);  
  spec = tabHost.newTabSpec("upper1").setIndicator("Upper1").setContent(intent);
  tabHost.addTab(spec);

  intent = new Intent().setClass(this, recommend_friend_new.class);  
  spec = tabHost.newTabSpec("upper2").setIndicator("Upper2").setContent(intent);
  tabHost.addTab(spec);

  intent = new Intent().setClass(this, recommend_friend_favorite.class);  
  spec = tabHost.newTabSpec("upper3").setIndicator("Upper3").setContent(intent);
  tabHost.addTab(spec);

 }
}

xml for upper tap is,

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/uppertabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TabWidget
        android:id="@+id/uppertabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
    <FrameLayout
        android:id="@+id/uppertabcontent"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        />
</LinearLayout>

xml for lower tab is,

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

  <RelativeLayout
     android:layout_width="fill_parent"
     android:layout_height="fill_parent">

   <TabWidget android:id="@android:id/tabs"  
     android:layout_alignParentBottom="true"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       />

      <FrameLayout android:id="@android:id/tabcontent"  
         android:layout_above="@android:id/tabs"
            android:layout_width="fill_parent"  
            android:layout_height="fill_parent">  
   </FrameLayout>
  </RelativeLayout>
  </TabHost>

</LinearLayout>

The result is shown below.

□□□□□□□□□□□□□□□□□□□□□□□□□□
□                        □
□                        □
□                        □
□                        □
□                        □
□□□□□□□□□□□□□□□□□□□□□□□□□□
□       □        □       □
□upper1 □ upper2 □ upper3□
□□□□□□□□□□□□□□□□□□□□□□□□□□
□ lower1□lower2  □ lower3□
□□□□□□□□□□□□□□□□□□□□□□□□□□

Of course, upper 3 taps should be stick to ceilling, like,

□□□□□□□□□□□□□□□□□□□□□□□□□□
□       □        □       □
□upper1 □ upper2 □ upper3□
□□□□□□□□□□□□□□□□□□□□□□□□□□
□                        □
□                        □
□                        □
□                        □
□                        □
□□□□□□□□□□□□□□□□□□□□□□□□□□
□ lower1□ lower2 □ lower3□
□□□□□□□□□□□□□□□□□□□□□□□□□□

(I got an advice that using activitygroup, but it doesn't work.)

import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;

public class uppertab extends ActivityGroup {


 private TabHost tabHost;
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.upperlay);

 tabHost = (TabHost)findViewById(R.id.friendtabhost);

 tabHost.setup(getLocalActivityManager());



tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("tab1").setContent(new Intent(this, tab1.class)));

     tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("tab2").setContent(new Intent(this, tab2.class)));

     tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator("tab3").setContent(new Intent(this, tab3.class)));

}

}

DDMS says that

tabHost.setup(getLocalActivityManager());

has a problem.

What can I do :(?