次のソース コードがあり、locationListener を使用すると、地図上に画鋲が表示されません。ただし、ロケーションリスナーを使用していない場合、すべてが完全に機能します。あなたの助けが必要です
package com.example.googlemaps;
import java.util.Iterator;
import java.util.List;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import com.google.android.maps.MapView.LayoutParams;
import com.google.android.maps.OverlayItem;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
public class MapsActivity extends MapActivity {
MapView mapView;
//locationManager provides capability to receive info from GPS
LocationManager locManager;
LocationListener locListener;
GeoPoint p;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
//zoom feature is build in MapView class
mapView = (MapView)findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
initLocationManager();
}
/**
* initialize the locationManager
*/
private void initLocationManager(){
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locListener = new LocationListener() {
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
// called when the status of the GPS provider changes
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
// called when the GPS provider is turned on (user turning on the GPS on the phone)
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
// called when the GPS provider is turned off (user turning off the GPS on the phone)
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
// called when the listener is notified with a location update from the GPS
createAndShowMyItemizedOverlay(location);
}
};
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 35000, 10, this.locListener);
}
/**
* this method will be called whenever a change of current position is
* submitted by GPS
*/
private void createAndShowMyItemizedOverlay(Location newLocation){
List<Overlay> listOverlays = mapView.getOverlays();
listOverlays.clear();
//initialize icon
Drawable icon = this.getResources().getDrawable(R.drawable.pushpin);
//transform the location to a geopoint
p = new GeoPoint((int)(newLocation.getLatitude()*1E6), (int)(newLocation.getLongitude()*1E6));
//create the overlay and show it
MyItemizedOverlay itemizedOverlay = new MyItemizedOverlay(icon, this);
OverlayItem overlayItem = new OverlayItem(p, "My Location", "I am in Dublin");
itemizedOverlay.addItem(overlayItem);
listOverlays.add(itemizedOverlay);
mapView.getOverlays().add(itemizedOverlay);
//move to location
mapView.getController().animateTo(p);
mapView.getController().setZoom(17);
//redraw map
mapView.postInvalidate();
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
および MyItemizedOverlay クラスは次のとおりです。
package com.example.googlemaps;
import java.util.ArrayList;
import java.util.List;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class MyItemizedOverlay extends ItemizedOverlay{
private ArrayList<OverlayItem> ListItems = new ArrayList<OverlayItem>();
private Drawable marker;
private Context mContext;
public MyItemizedOverlay(Drawable defaultMarker) {
// TODO Auto-generated constructor stub
super(boundCenterBottom(defaultMarker));
}
public MyItemizedOverlay(Drawable defaultMarker, Context context){
super(boundCenterBottom(defaultMarker));
mContext = context;
}
/**
* When the populate() method executes, it will call
* createItem(int) in the ItemizedOverlay to retrieve each OverlayItem.
* You must override this method to properly read from the ArrayList
* and return the OverlayItem from the position specified by the given integer.
*/
@Override
protected OverlayItem createItem(int index) {
// TODO Auto-generated method stub
return ListItems.get(index);
}
@Override
public int size() {
// TODO Auto-generated method stub
return ListItems.size();
}
//addItem is used to add new OverlayItem object to ArrayList
public void addItem(OverlayItem item) {
ListItems.add(item);
populate();
}
@Override
protected boolean onTap(int index) {
OverlayItem item = (OverlayItem) ListItems.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return true;
}
}
PS: マニフェストに ACCESS_FINE_LOCATION と ACCESS_COARSE_LOCATION AND INTERNET があります
電話でのテストに関する問題が何であるかはまだわかりません。GPS、電話、ビルドターゲットに問題がないことは確かです