use tabhost by extending MapActivity

Question

main.xml<TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent">
<TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content">
      <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"  android:paddingTop="5dip">
        <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/main">
            <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1"/>
            <TextView android:id="@+id/empty" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="Loading"/>

public class TabbedListMapActivity extends MapActivity implements OnTabChangeListener {

private static final String LIST_TAB_TAG = "List";
private static final String MAP_TAB_TAG = "Map";

 private TabHost tabHost;

private ListView listView;
private MapView mapView;
private  LocalActivityManager mLocalActivityManager ;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   setContentView(R.layout.main);

    tabHost = (TabHost) findViewById(android.R.id.tabhost);
    tabHost.setup();
    tabHost.setup();
    // LayoutInflater.from(this).inflate(R.layout.maplv, tabHost.getTabContentView(), true);
    // setup must be called if you are not inflating the tabhost from XML

    tabHost.setOnTabChangedListener(this);

    // setup list view
    listView = (ListView) findViewById(R.id.list);
    listView.setEmptyView((TextView) findViewById(R.id.empty));

    // create some dummy coordinates to add to the list
    List<GeoPoint> pointsList = new ArrayList<GeoPoint>();
    pointsList.add(new GeoPoint((int)(32.864*1E6), (int)(-117.2353*1E6)));
    pointsList.add(new GeoPoint((int)(37.441*1E6), (int)(-122.1419*1E6)));
    listView.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, pointsList));

    // add an onclicklistener to see point on the map
    listView.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView parent, View view, int position, long id) {
            GeoPoint geoPoint = (GeoPoint) listView.getAdapter().getItem(position);
            if(geoPoint != null) {
                // have map view moved to this point
                setMapZoomPoint(geoPoint, 12);
                // programmatically switch tabs to the map view
                tabHost.setCurrentTab(1);
            }
        }
    });

    // setup map view
    mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true);


    mapView.postInvalidate();

    // add views to tab host
    tabHost.addTab(tabHost.newTabSpec(LIST_TAB_TAG).setIndicator("List").setContent(R.id.list));
    tabHost.addTab(tabHost.newTabSpec(MAP_TAB_TAG).setIndicator("Map").setContent(R.id.mapview));

    //HACK to get the list view to show up first,
    // otherwise the mapview would be bleeding through and visible
    tabHost.setCurrentTab(1);
    tabHost.setCurrentTab(0);
}

/**
 * Instructs the map view to navigate to the point and zoom level specified.
 * @param geoPoint
 * @param zoomLevel
 */
private void setMapZoomPoint(GeoPoint geoPoint, int zoomLevel) {
    mapView.getController().setCenter(geoPoint);
    mapView.getController().setZoom(zoomLevel);
    mapView.postInvalidate();
}

/**
 * From MapActivity, we ignore it for this demo
 */
@Override
protected boolean isRouteDisplayed() {
    return false;
}

/**
 * Implement logic here when a tab is selected
 */
public void onTabChanged(String tabName) {
    if(tabName.equals(MAP_TAB_TAG)) {
        //do something on the map
    }
    else if(tabName.equals(LIST_TAB_TAG)) {
        //do something on the list
    }
} } 

i get a result as http://i3.6.cn/cvbnm/e1/71/e9/19008bd7258eaf858be73dc6431b1f8b.jpg, i want to get two tab,could you help me?thanks.

Answer 1

You need to use TabWidget : http://developer.android.com/reference/android/widget/TabWidget.html or http://developer.android.com/guide/tutorials/views/hello-tabwidget.html to show the buttons for the tabs if that's what you are looking for...

Answer 2

i answer my question: tabWidget is wrong and add LinearLayout:

<TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" 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="@android:id/tabs"
        android:layout_width="fill_parent" android:layout_height="wrap_content" />
      <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"  >
        <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/main">
            <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1"/>
            <TextView android:id="@+id/empty" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="Loading"/>

        </LinearLayout>
        <RelativeLayout  android:id="@+id/mainlayout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">
            <com.google.android.maps.MapView android:id="@+id/mapview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true" android:apiKey="0Ua9BENcUvNKEom7wvjrrtlCVIeJ9SNYAbLAkJA"/>
        </RelativeLayout>
      </FrameLayout>
  </LinearLayout>