android - 在不扩展 ExpandableListActivity 的情况下使用 ExpandableListView

Question

我已经扩展了 SherlockMapActivity，它是一个兼容库，允许在更高版本的 android 中找到类似界面的选项卡。问题是我有两个选项卡。一个 Mapview 选项卡和一个 ListView 选项卡。MapView 工作正常但 ListView 不工作。我想要一种方法来实现 expandablelistview 而无需扩展 expandablelistactivity..Expandablelistview 应该出现在 listview 选项卡下。现在的问题是 setListAdapter 方法在我的代码中未定义。请帮助。

public class MainActivity extends SherlockMapActivity implements LocationListener,ActionBar.TabListener {

private MapController mapController;
private MapView mapView;    
private LocationManager locationManager;
private GeoPoint currentPoint;
private Location currentLocation = null;
private PlaceOverlay currPos;
private ViewSwitcher tswitcher;

public boolean showMiniHelp = true;

TableLayout tlayout;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setContentView(R.layout.activity_main);

    tswitcher = (ViewSwitcher)findViewById(R.id.viewSwitcher1);


    getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    ActionBar.Tab tab1 = getSupportActionBar().newTab();
    tab1.setText("Map View");
    tab1.setTabListener(this);
    getSupportActionBar().addTab(tab1);

    ActionBar.Tab tab2 = getSupportActionBar().newTab();
    tab2.setText("List View");
    tab2.setTabListener(this);
    getSupportActionBar().addTab(tab2);


    mapView = (MapView)findViewById(R.id.mapView);
    mapView.setBuiltInZoomControls(true);
    mapView.setSatellite(false);      
    mapController = mapView.getController();
    mapController.setZoom(17);
    getLastLocation();
    drawCurrPositionOverlay();
    drawStores();
    drawSportLocations();
    animateToCurrentLocation();

    //ListViewSetup

     // Construct Expandable List
    final String NAME = "name";
    final String IMAGE = "image";
    final String DATA = "data";
    final LayoutInflater layoutInflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    final ArrayList<HashMap<String, String>> headerData = new ArrayList<HashMap<String, String>>();

    final HashMap<String, String> group1 = new HashMap<String, String>();
    group1.put(NAME, "Group 1");
    headerData.add( group1 );

    final HashMap<String, String> group2 = new HashMap<String, String>();
    group2.put(NAME, "Group 2");
    headerData.add( group2);

    final HashMap<String, String> group3 = new HashMap<String, String>();
    group3.put(NAME, "Group 3");
    headerData.add( group3);

    final ArrayList<ArrayList<HashMap<String, Object>>> childData = new ArrayList<ArrayList<HashMap<String, Object>>>();

    final ArrayList<HashMap<String, Object>> group1data = new ArrayList<HashMap<String, Object>>();
    childData.add(group1data);

    final ArrayList<HashMap<String, Object>> group2data = new ArrayList<HashMap<String, Object>>();
    childData.add(group2data);

    final ArrayList<HashMap<String, Object>> group3data = new ArrayList<HashMap<String, Object>>();
    childData.add(group3data);

    // Set up some sample data in both groups
    for( int i=0; i<10; ++i) {
        final HashMap<String, Object> map = new HashMap<String,Object>();
        map.put(NAME, "Child " + i );
        map.put(DATA, "Data " + i);
        map.put(IMAGE, getResources().getDrawable((i%3==0? R.drawable.basketball : R.drawable.supermarket)));
        ( i%2==0 ? group1data : group2data ).add(map);
    }
    final HashMap<String, Object> map = new HashMap<String,Object>();
    map.put(NAME, "Child x");
    map.put(DATA, "Data x");
    map.put(IMAGE, getResources().getDrawable(R.drawable.tennis));
    group3data.add(map);

    setListAdapter( new SimpleExpandableListAdapter(
            this,
            headerData,
            R.layout.group_row,
            new String[] { NAME, DATA },    // the names of the data
            new int[] { R.id.groupname },   // the text field to populate with the field data
            childData,
            0,
            null,
            new int[] {}
        ) {
            @Override
            public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
                final View v = super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent);

                // Populate your custom view here
                ((TextView)v.findViewById(R.id.name)).setText( (String) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(NAME) );
                ((TextView)v.findViewById(R.id.data)).setText( (String) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(DATA) );
                ((ImageView)v.findViewById(R.id.image)).setImageDrawable( (Drawable) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(IMAGE) );

                return v;
            }

            @Override
            public View newChildView(boolean isLastChild, ViewGroup parent) {
                 return layoutInflater.inflate(R.layout.expandable_list_item_with_image, null, false);
            }
        }
    );
    ExpandableListView list = (ExpandableListView) findViewById(android.R.id.list);
    list.setOnChildClickListener(new OnChildClickListener(){
        public boolean onChildClick(ExpandableListView parent, View v,
                int groupPosition, int childPosition, long id) {
            System.out.println("Group:"+groupPosition+", Child: "+childPosition);
            return true;
        }
    });

Answer 1

绝对是!即使我有一个similar problem.

扩展 ExpandableListActivity 只是通过直接为您提供适配器和其他东西来帮助您。

但是您也可以在布局中定义一个 ExpandableListView 并手动声明它的所有适配器。

这tutorial会帮助你。

祝你好运!