Get user last know location

There are two location provider in Android, NETWORK_PROVIDER and GPS_PROVIDER. In case you want to get last known user location, which one you should use?

Its a example to get last know location from both NETWORK_PROVIDER and GPS_PROVIDER, and choice the provider base on its accuracy.

Please note that:
- More accuracy not means most recent in time.
- If no accuracy, 0.0 will be return from getLastKnownLocation() method. The code havent concern this case.
- The code get last known location one time only, if you have to monitor continuously, and estimate the best location, refer Android documenet here.

Main code:

package com.example.androidmylocation;

import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.app.Activity;
import android.content.Context;

public class MainActivity extends Activity {
 
 TextView textView_GpsLocation, textView_NetworkLocation, textView_MyLocation;
 
 final String gpsLocationProvider = LocationManager.GPS_PROVIDER;
 final String networkLocationProvider = LocationManager.NETWORK_PROVIDER;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView_GpsLocation = (TextView)findViewById(R.id.textgpslocation);
        textView_NetworkLocation = (TextView)findViewById(R.id.textnetworklocation);
        textView_MyLocation = (TextView)findViewById(R.id.textmylocation);

        
        LocationManager locationManager = 
          (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
        
        Location lastKnownLocation_byGps = 
          locationManager.getLastKnownLocation(gpsLocationProvider);
        Location lastKnownLocation_byNetwork = 
          locationManager.getLastKnownLocation(networkLocationProvider);
        
        if(lastKnownLocation_byGps==null){
         textView_GpsLocation.setText("GPS Last Location not available");
         
         if(lastKnownLocation_byNetwork==null){
          textView_NetworkLocation.setText("Network Last Location not available");
          textView_MyLocation.setText("No Last Known Location!");
         }else{
          textView_NetworkLocation.setText("Network Location:
" + lastKnownLocation_byNetwork.toString());
          
          textView_MyLocation.setText(
            "My Location is " + lastKnownLocation_byNetwork.getLatitude() +
            " : " + lastKnownLocation_byNetwork.getLongitude());
         }
         
         
        }else{
         textView_GpsLocation.setText("GPS Location:
" + lastKnownLocation_byGps.toString());
         
         if(lastKnownLocation_byNetwork==null){
          textView_NetworkLocation.setText("Network Last Location not available");
          textView_MyLocation.setText(
            "My Location is " + lastKnownLocation_byGps.getLatitude() +
            " : " + lastKnownLocation_byGps.getLongitude());
         }else{
          textView_NetworkLocation.setText("Network Location:
" + lastKnownLocation_byNetwork.toString());
          
          //Both Location provider have last location
          //decide location base on accuracy
          if(lastKnownLocation_byGps.getAccuracy() <= lastKnownLocation_byNetwork.getAccuracy()){
           textView_MyLocation.setText(
                "My Location from GPS
" + lastKnownLocation_byGps.getLatitude() +
                " : " + lastKnownLocation_byGps.getLongitude());
          }else{
           textView_MyLocation.setText(
                "My Location from Network
" + lastKnownLocation_byNetwork.getLatitude() +
                " : " + lastKnownLocation_byNetwork.getLongitude());
          }
          
         }
        }

    }

}

Layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <TextView
        android:id="@+id/textgpslocation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/textnetworklocation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/textmylocation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textStyle="bold" />

</LinearLayout>

In order to use both NETWORK_PROVIDER and GPS_PROVIDER, only the ACCESS_FINE_LOCATION permission is need, because it includes permission for both providers. (Permission for ACCESS_COARSE_LOCATION includes permission only for NETWORK_PROVIDER.)

Download the files.

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