使用默認提供程序單擊按鈕時獲取位置

2

這就是我在做的事情：

MyLocation類：

import android.app.ProgressDialog; 
import android.content.Context; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Looper; 

public class MyLocation { 
    // Timer timer1; 
    LocationManager lm; 
    LocationResult locationResult; 
    boolean gps_enabled=false; 
    boolean network_enabled=false; 
    AsyncTask<Context, Void, Void> mtask; 

    public boolean getLocation(Context context, LocationResult result) 
    { 
     //I use LocationResult callback class to pass location value from MyLocation to user code. 
     locationResult=result; 
     if(lm==null) 
      lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); 

     //exceptions will be thrown if provider is not permitted. 
     try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){} 
     try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){} 

     //don't start listeners if no provider is enabled 
     if(!gps_enabled && !network_enabled) 
      return false; 

     if(gps_enabled) 
      lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps); 
     if(network_enabled) 
      lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork); 
     // timer1=new Timer(); 
     // timer1.schedule(new GetLastLocation(), 20000); 
     mtask= new GetLastLocation().execute(); 
     return true; 
    } 

    LocationListener locationListenerGps = new LocationListener() { 
     public void onLocationChanged(Location location) { 
      // timer1.cancel(); 
      mtask.cancel(true); 
      locationResult.gotLocation(location); 
      lm.removeUpdates(this); 
      lm.removeUpdates(locationListenerNetwork); 
     } 
     public void onProviderDisabled(String provider) {} 
     public void onProviderEnabled(String provider) {} 
     public void onStatusChanged(String provider, int status, Bundle extras) {} 
    }; 

    LocationListener locationListenerNetwork = new LocationListener() { 
     public void onLocationChanged(Location location) { 
      mtask.cancel(true); 
      locationResult.gotLocation(location); 
      lm.removeUpdates(this); 
      lm.removeUpdates(locationListenerGps); 
     } 
     public void onProviderDisabled(String provider) {} 
     public void onProviderEnabled(String provider) {} 
     public void onStatusChanged(String provider, int status, Bundle extras) {} 
    }; 

    private Context mContext; 
    public MyLocation(Context c) { this.mContext = c; } 


    class GetLastLocation extends AsyncTask<Context, Void, Void> 
    { 

    ProgressDialog dialog = new ProgressDialog(mContext); 

     protected void onPreExecute() 
     { 
      dialog.setMessage("Searching...."); 
      dialog.show(); 
     } 

     protected Void doInBackground(Context... params) 
     { 
      Handler mHandler = new Handler(Looper.getMainLooper()); 



         // ... 
         mHandler.post(new Runnable() { 
         public void run() { 
         lm.removeUpdates(locationListenerGps); 
         lm.removeUpdates(locationListenerNetwork); 

         Location net_loc=null, gps_loc=null; 
         if(gps_enabled) 
          gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
         if(network_enabled) 
          net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 

         //if there are both values use the latest one 
         if(gps_loc!=null && net_loc!=null){ 
          if(gps_loc.getTime()>net_loc.getTime()) 
           locationResult.gotLocation(gps_loc); 
          else 
           locationResult.gotLocation(net_loc); 
          return; 
         } 

         if(gps_loc!=null){ 
          locationResult.gotLocation(gps_loc); 
          return; 
         } 
         if(net_loc!=null){ 
          locationResult.gotLocation(net_loc); 
          return; 
         } 
         locationResult.gotLocation(null); 
        } 
         }); 
         // ... 


      return null; 
     } 

     protected void onPostExecute(final Void unused) 
     { 
      dialog.dismiss(); 
     } 
    } 





    public static abstract class LocationResult{ 
     public abstract void gotLocation(Location location); 
    } 
}

和按鈕點擊的方法：

MyLocation myLocation = new MyLocation(); 
private void locationClick() { 
myLocation.getLocation(this, locationResult)); 
} 

public LocationResult locationResult = new LocationResult(){ 
@Override 
public void gotLocation(final Location location){ 
    //Got the location! 
    }); 
} 
};

我已經在計算器的舊後發現這個的時候我一直在尋找類似問題的解決方案.... ..

來源

2012-02-27 06:18:21

1

你必須使用此方法來檢查所有能夠提供

void requestLocationUpdates() 
    { 
     locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
     List<String> enabledProviders = this.locationManager.getProviders(true); 
     for (String provider:enabledProviders){ 
      Log.i(">>>>>>>", "Requesting location updates from provider " + provider); 
      this.locationManager.requestLocationUpdates(provider, 10000l, 10, this); 
     } 
    }

來源

2012-02-27 05:50:10 Newts

0

LocationManager locMgr = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 
    LocationListener locListner = new LocationListener() { 

     public void onProviderEnabled(String provider) { 


     } 

     public void onProviderDisabled(String provider) { 


     } 

     public void onLocationChanged(Location location) { 

      // CODE TO READ LOCATION 

     } 

     public void onStatusChanged(String provider, int status, 
       Bundle extras) { 
      // TODO Auto-generated method stub 

     } 
    }; 

    // ON Click of button do this request. 
    locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locListner);

而且你需要在你的清單文件

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

權限添加更多細節請參考Developer Guide

來源

2012-02-27 05:58:42

使用默認提供程序單擊按鈕時獲取位置

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