Android获取用户location值为NULL的解决办法的代码

下面的代码内容是关于Android获取用户location值为NULL的解决办法的代码，应该是对码农有一些用处。

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package com.jeedroid.tools;   

import java.io.IOException;   
import java.util.List;   
import java.util.Locale;   

import android.content.Context;   
import android.location.Address;   
import android.location.Criteria;   
import android.location.Geocoder;   
import android.location.Location;   
import android.location.LocationListener;   
import android.location.LocationManager;   
import android.os.Bundle;   
import android.provider.Settings;   
import android.util.Log;   

public class LocationTools   
{   
    private Location location;   
public static LocationManager getLocationManager(Context context)   
{   
    return (LocationManager) context.getSystemService(context.LOCATION_SERVICE);   
}   
public String getAddress(Context context)   
{   
    LocationManager locationManager = this.getLocationManager(context);   
    if(!locationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER))   
    {   
    android.provider.Settings.Secure.setLocationProviderEnabled(context.getContentResolver(), LocationManager.GPS_PROVIDER, false);   
    }   
    return doWork(context);   
}   

private String doWork(Context context)   
{   
    String addres="";   
    LocationManager locationManager = this.getLocationManager(context);   
    Criteria criteria = new Criteria();   
    criteria.setAccuracy(Criteria.ACCURACY_FINE);     
    criteria.setAltitudeRequired(false);     
    criteria.setBearingRequired(false);     
    criteria.setCostAllowed(false);     
    criteria.setPowerRequirement(Criteria.POWER_LOW);     
    String provider =locationManager.getBestProvider(criteria, true);   
    Log.i("provider>>>>>>", provider);   
    while(location==null)   
    {   
    location =locationManager.getLastKnownLocation(provider);   
    }   
    LocationListener locationListener = new LocationListener()   
    {   

        @Override  
        public void onLocationChanged(Location location)   
        {   
            LocationTools.this.location=location;   
        }   

        @Override  
        public void onProviderDisabled(String provider)   
        {   

        }   

        @Override  
        public void onProviderEnabled(String provider)   
        {   

        }   

        @Override  
        public void onStatusChanged(String provider, int status, Bundle extras)   
        {   

        }   

    };   
    locationManager.requestLocationUpdates(provider, 1000, 10, locationListener);   

    Geocoder geo = new Geocoder(context,Locale.getDefault());   
    try  
    {   
        List
 address=geo.getFromLocation(location.getLatitude(), location.getLongitude(), 1);   
        if(address.size()>0)   
        {   
            addres=address.get(0).getAddressLine(0);   
        }   
    } catch (IOException e)   
    {   
        e.printStackTrace();   
    }   
    return addres;   
}   
}  

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