[英]Android Google Maps v2 not showing Compass and Location Icon
我無法顯示compass
圖標和my location
圖標。 我有代碼googleMap.getUiSettings.setMyLocationButtonEnabled(true)
和googleMap.getUiSettings().setCompassEnabled(true);
但它沒有在地圖上顯示。
package com.ctc.weathermap;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Toast;
public class WeatherMapActivity extends Activity implements LocationListener {
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.weather_maps_main);
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabledGPS = service.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean enabledWiFi = service.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!enabledGPS) {
Toast.makeText(this, "GPS signal not found", Toast.LENGTH_LONG).show();
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
else if(!enabledWiFi) {
Toast.makeText(this, "Network signal not found", Toast.LENGTH_LONG).show();
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
initializeMap();
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
}
private void initializeMap() {
// check if map is created
if(googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); // creates the map
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Map could not be created", Toast.LENGTH_SHORT)
.show();
}
}
}
@Override
protected void onResume() {
super.onResume();
initializeMap();
}
@Override
public void onLocationChanged(Location location) {
googleMap.clear();
MarkerOptions marker = new MarkerOptions().position(new LatLng(location.getLatitude(), location.getLongitude()));
marker.title("Current location");
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN));
googleMap.addMarker(marker);
googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 16));
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
其余代碼的工作原理如標記,什么不是。 我已經嘗試將位置和指南針的代碼放在initializeMap()
但它仍然沒有顯示出來。 我將不勝感激任何幫助。 謝謝!
您尚未啟用my-location圖層。請查看此鏈接以獲取更多詳細信息
所以請做
googleMap.setMyLocationEnabled(true);
之前
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
這將使你的setMyLocationButton
出現..
並且, 僅當您將地圖旋轉到不與北方對齊時,才會顯示羅盤圖標 。
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