我正在尝试将 Google Maps View 和 ListView 放入一项活动中。MapsView 占上侧的 2/3，列表占下侧的 1/3（纵向）。
以这种方式假设它是肖像：
MapsView 和 ListView 都将收到相同的 JSON 信息，它们将获得 onCreate()。我已经能够在屏幕的 2/3 上放置 MapsView，但 ListView 不会接收任何数据。有人可以告诉我，当超类不是时如何正确处理 ListView ListActivity？
这是我的代码：
// url to make request
private static String url = ""; //here pass the url
// JSON Node names
private static final String TAG_LOCATION = "location";
private static final String TAG_LOCATION1= "location";
private static final String TAG_LOCATION_ID = "LocationID";
private static final String TAG_NAME = "Name";
private static final String TAG_PHONE = "Phone";
private static final String TAG_FORMATTED_PHONE = "FormattedPhone";
private static final String TAG_ADDRESS = "Address";
private static final String TAG_CROSS_STREET = "CrossStreet";
private static final String TAG_LAT = "Lat";
private static final String TAG_LNG = "Lng";
private static final String TAG_DISTANCE= "Distance";
private static final String TAG_POSTAL_CODE = "PostalCode";
private static final String TAG_CITY = "City";
private static final String TAG_STATE = "State";
private static final String TAG_COUNTRY= "Country";
// contacts JSONArray
JSONArray location = null;
JSONObject location1=null;
ListView locationList;
private MapView mapView;
LocationManager lm;
LocationListener locationListener;
MapController mapController;
private ListAdapter adapter;
private static final double lat = 11.9333;
private static final double lng = 108.417;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_map);
locationList=( ListView)findViewById(R.id.list_Surroundings);
locationList.setAdapter(adapter);
// Hashmap for ListView
ArrayList<HashMap<String, String>> locationList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of Category
location=json.getJSONArray(TAG_LOCATION);
//looping through all categories
for(int i = 0; i < location.length(); i++){
JSONObject c = location.getJSONObject(i);
JSONObject c1=c.getJSONObject(TAG_LOCATION1);
// Storing each json item in variable
String LocationID = c1.getString(TAG_LOCATION_ID);
String Name = c1.getString(TAG_NAME);
String Phone = c1.getString(TAG_PHONE);
String FormattedPhone = c1.getString(TAG_FORMATTED_PHONE);
String Address = c1.getString(TAG_ADDRESS);
String CrossStreet = c1.getString(TAG_CROSS_STREET);
String Lat = c1.getString(TAG_LAT);
String Lng = c1.getString(TAG_LNG);
String Distance = c1.getString(TAG_DISTANCE);
String PostalCode = c1.getString(TAG_POSTAL_CODE);
String City = c1.getString(TAG_CITY);
String State = c1.getString(TAG_STATE);
String Country = c1.getString(TAG_COUNTRY);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_LOCATION_ID, LocationID);
map.put(TAG_NAME, Name);
map.put(TAG_PHONE, Phone);
map.put(TAG_FORMATTED_PHONE, FormattedPhone);
map.put(TAG_ADDRESS, Address);
map.put(TAG_CROSS_STREET, CrossStreet);
map.put(TAG_LAT, Lat);
map.put(TAG_LNG, Lng);
map.put(TAG_DISTANCE, Distance);
map.put(TAG_POSTAL_CODE, PostalCode);
map.put(TAG_CITY, City);
map.put(TAG_STATE, State);
map.put(TAG_COUNTRY, Country);
// adding HashList to ArrayList
locationList.add(map);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
adapter = new SimpleAdapter(this, locationList,
R.layout.list_item,
new String[] { TAG_NAME }, new int[] {
R.id.name});
mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
List mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(
R.drawable.map_pin_red);
CustomItemizedOverlay itemizedOverlay = new CustomItemizedOverlay(
drawable, this);
GeoPoint point = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
OverlayItem overlayitem = new OverlayItem(point, "Hello",
"I'm in Athens, Greece!");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
mapController = mapView.getController();
mapController.animateTo(point);
mapController.setZoom(10);
lm=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationListener= new MylocationListener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}
public class MylocationListener implements LocationListener{
@Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
if(loc!=null){
Toast.makeText(getBaseContext(), "Location Changed : Lat:" +loc.getLatitude() + "Lng: " + loc.getLongitude(), Toast.LENGTH_SHORT).show();
}
GeoPoint point = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
mapController.animateTo(point);
mapController.setZoom(10);
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}