如何在没有GPS的情况下连续获取用户位置

关于此问题有一些疑问，但是我找不到任何方法都可以正常工作。我使用GPS提供程序实现了该项目的版本，现在我想实现一个仅使用Wifi等网络提供程序就可以在没有GPS的情况下找到用户位置的版本。我尝试了此操作，但是它不起作用（我无法以任何方式获得“完成”消息）：

public class MapsActivity extends FragmentActivity {

    double latitude;
    double longitude;

    LocationManager locationManager;
    android.location.LocationListener networkLocationListener;
    Location location;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        networkLocationListener = new android.location.LocationListener() {
            public void onLocationChanged(Location location) {

                latitude = location.getLatitude();
                longitude = location.getLongitude();

                Log.d("->", "done.");

            }

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

            public void onProviderEnabled(String provider) {}

            public void onProviderDisabled(String provider) {}
        };

        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, networkLocationListener);

    }

...

另外，这是我的清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.doruk.myapplication">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!--
 The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but are recommended.
    -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/orange"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="@string/google_maps_key" />

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <receiver
            android:name=".ConnectionChangeReceiver"
            android:label="NetworkConnection">
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
            </intent-filter>
        </receiver>
    </application>

</manifest>

你看到问题了吗？您在这一点上有何建议？有没有更好的办法？