Android OnLocationChanged永不被稱爲

Question

我有以下代碼 - enter code here
using System; using System.Collections.Generic; using System.Text;使用Android.App的 ;使用Android.Content的 ;使用Android.Runtime的 ;使用Android.Views的 ;使用Android.Widget的 ; 使用Android.OS;使用Android.Locations的 ;使用Android.Bluetooth的 ;

namespace GetCurrentLocation 
{ 
    [Activity(Label = "Get Current Location", MainLauncher = true, Icon = "@drawable/icon")] 
    public class Activity1 : Activity, ILocationListener 
    { 
     LocationManager _locMgr ; 
     String oBestProvider; 

     protected override void OnCreate(Bundle bundle) 
     { 
      base.OnCreate(bundle); 
      _locMgr = GetSystemService(Context.LocationService) as LocationManager; 

      // Set our view from the "main" layout resource 
      SetContentView(Resource.Layout.UI); 
      StringBuilder strLocations = new StringBuilder(); 
      // Get our button from the layout resource, 
      // and attach an event to it 
      Button button = FindViewById<Button>(Resource.Id.btnGetLocation); 
      int i; 
      var locationText = 
       FindViewById<TextView>(Resource.Id.txtLocation); 

       Android.Locations.Location oLocation; 

      oLocation = _locMgr.GetLastKnownLocation (Context.LocationService); 
      IList<String> oLocationProviders = _locMgr.GetProviders(true); 

      //Location location; 
      button.Click += delegate { 
       if(oLocationProviders != null) 
        { 

       _locMgr.RequestLocationUpdates(oLocationProviders[0], 2000, 1, this); 
       _locMgr.RequestLocationUpdates(oLocationProviders[1], 2000, 1, this); 


        } 
        else{ 

        locationText.Text ="No Provider Found"; 
        } 

      }; 

     } 



     protected override void OnResume() { 
      base.OnResume(); 

     } 

     protected override void OnPause() { 
      base.OnPause(); 
      _locMgr.RemoveUpdates(this); 
     } 

     public void OnLocationChanged (Location location) 
     { 

      var locationText = 
        FindViewById<TextView> (Resource.Id.txtLocation); 
      if (location != null) { 
       locationText.Text = String.Format ("Latitude = {0}, Longitude = {1}", 
        location.Latitude, location.Longitude); 
      } 
     } 

     public void OnProviderDisabled(string provider) 
     { 

     } 

     public void OnProviderEnabled(string provider) 
     { 
     } 

     public void OnStatusChanged(string provider, Availability status, Bundle extras) 
     { 
     } 

    } 
} 

我試過使用GetBestProvider/GetProviders/RequestLocationUpdates/GetLastKnownLocation。我無法繼續。有人可以指導我爲什麼我的OnLocationUpdates永遠不會被調用。即使類Activity正在實現ILocationListener接口，我也無法在此函數上使用Override關鍵字。請幫助..... 也只是爲了您的信息，我試圖在谷歌的試用版仿真器AVD For Nexus 5上運行此代碼。

Answer 1

如果您在模擬器上運行，那麼onLocationChanged將永遠不會被調用，除非您從DDMS提供位置。從DDMS你需要給經度和緯度，所以它會調用所需的方法。

請檢查空曠區域的真實設備上的代碼。