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这是我拥有的课程，并给了我错误：

public class ShowCarMapChild extends MapActivity {


private MapView mapView;
private Car car;
private String tag;





@Override
protected void onCreate(Bundle icicle) {
    // TODO Auto-generated method stub
    super.onCreate(icicle);
    Log.d("hemendik pasetan da?", "bai!!");
    setContentView(R.layout.car_map_view);
}

public void setCar(Car car){
    this.car = car;
}

public void setTag (String tag){
    this.tag = tag;
}

public String getTag (){
    return tag;
}

public View getMapView(Context context){
    Log.d("getMapView", "pass");
    setContentView(R.layout.car_map_view);
    LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
    View view = infalInflater.inflate(R.layout.car_map_view, null);
    setMap(view,context);
    return view;
}




public void setMap(View view, Context context){
    mapView = (MapView) view.findViewById(R.id.mapShowCarLocation);
    MapController mc = mapView.getController();
    mc.animateTo(car.getLocation());
    mc.setZoom(15);
    PinpointItem point = new PinpointItem(car.getLocation(), car, context);
    Drawable d = getResources().getDrawable(R.drawable.pinpoint);
    CustomPinpointOverlay overlay = new CustomPinpointOverlay(d);
    overlay.insertPinpoint(point);
    mapView.getOverlays().add(overlay);
}
@Override
protected boolean isRouteDisplayed() {
    // TODO Auto-generated method stub
    return false;
}

}

布局：car_map_view.xml

<?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="150dip"
android:orientation="vertical" >

    <com.google.android.maps.MapView
        android:id="@+id/mapShowCarLocation"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:clickable="true"
        android:apiKey="0UFOPeLgKxoW8VGjdzV5QN6N53N7733i1kTFI3g"
        android:enabled="true" />
</LinearLayout>

正如我在标题中所说的错误是在我执行 setContentView 时。我还必须说，我正在尝试使用此类作为子类放入可扩展列表中。如果需要其余代码，也请告诉我。

这是我调用getMapView()方法的地方。来自 BaseExpandableListAdapter

 public class ShowCarExpandListAdapter extends BaseExpandableListAdapter {

 ....

 public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View view,
        ViewGroup parent) {
    // TODO Auto-generated method stub

    if (view == null){
        if (groupPosition == 0){
            Log.d("getChildView", "pass");
            ShowCarMapChild mapChild = (ShowCarMapChild) getChild(groupPosition, childPosition);
            view = mapChild.getMapView(context);
            //LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
            //ShowCarMapChild mapChild = (ShowCarMapChild) getChild(groupPosition, childPosition);
            //view = infalInflater.inflate(R.layout.car_map_view, null);
            //MapView mv = mapChild.getMap(view, context);
            //mv.setTag(mapChild.getTag());

        }else{
            Log.d("getChildView", "pass from else");
            LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
            ShowCarExpandChild child = (ShowCarExpandChild) getChild(groupPosition, childPosition);
            view = infalInflater.inflate(R.layout.car_child, null);
            TextView tv = (TextView) view.findViewById(R.id.tvChild);
            tv.setText(child.getName());
            tv.setTag(child.getTag());
        }           
    }
    return view;
}

  .....
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