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我想獲得「藍點」我的位置座標,並將其設置爲我的初始mapview負載的中心。但是我得到一個空指針異常。無法獲得「mylocation」谷歌地圖Android
我在這裏錯過了什麼?
public class GetLocationActivity extends MapActivity implements OnClickListener {
private MapView location;
private LocationMarker locationMarker;
private MyLocationOverlay locationOverlay;
private GeoPoint destination;
private GeoPoint source;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location);
location = (MapView) this.findViewById(R.id.location);
location.setBuiltInZoomControls(true);
location.setClickable(true);
location.setLongClickable(true);
location.getController().setZoom(12);
locationMarker = new LocationMarker(this, location, marker,
(ImageView) findViewById(R.id.drag));
location.getOverlays().add(locationMarker);
locationOverlay = new MyLocationOverlay(this, location);
location.getOverlays().add(locationOverlay);
source = locationOverlay.getMyLocation();
location.getController().setCenter(
new GeoPoint(source.getLatitudeE6(), source.getLongitudeE6()));
}
獲得nullPointer source.getLatitudeE6()
。
您的代碼中沒有位置偵聽器,然後無法獲取當前位置。請閱讀以下文檔:http://developer.android.com/intl/ko/training/basics/location/currentlocation.html – BBonDoo