Android原生GPS和網絡定位工具類

在應用開發中我們常常需要網絡擷取位置的方法，這裡做一個工具類的封裝，使用的是Android原生定位，包含兩種方式，一種是原生GPS一種是網絡定位的封裝實作：

工具類代碼如下所示：
           

package com.vondear.tools.tools;

import android.Manifest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.app.Activity;
import android.support.v4.content.LocalBroadcastManager;
import android.view.accessibility.AccessibilityManager;
import android.widget.Toast;

import com.ta.utdid2.android.utils.SharedPreferenceHelper;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

/**
 *
 * Created by AndyYuan on time at 2019/6/20.
 */

public class GetGPSUtil {

    static GetGPSUtil getGPSUtil;

    public static GetGPSUtil getInstance() {
        if (getGPSUtil == null) getGPSUtil = new GetGPSUtil();
        return getGPSUtil;
    }

    /**
     * 擷取經緯度
     *
     * @param context
     * @return
     */
    private String getLngAndLat(Context context) {
        double latitude = 0.0;
        double longitude = 0.0;
        LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {  //從gps擷取經緯度
            if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                //    ActivityCompat#requestPermissions
                // here to request the missing permissions, and then overriding
                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                //                                          int[] grantResults)
                // to handle the case where the user grants the permission. See the documentation
                // for ActivityCompat#requestPermissions for more details.
                return "沒有GPS權限";
            }
            Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if (location != null) {
                latitude = location.getLatitude();
                longitude = location.getLongitude();
            } else {//當GPS信号弱沒擷取到位置的時候又從網絡擷取
                Toast.makeText(context, "GPS信号弱擷取不到", Toast.LENGTH_SHORT).show();
                return getLngAndLatWithNetwork(context);

            }
        } else {    //從網絡擷取經緯度
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, locationListener);
//通過查閱資料好像我們的Android手機要開啟過GPS（第一次擷取須GPS擷取或者其他第三方應用開啟使用過GPS）後然後getLastKnownLocation(LoactionManager.NETWORK_PROVIDER)這個方法才不會傳回空。
            Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            if (location != null) {
                latitude = location.getLatitude();
                longitude = location.getLongitude();
            }
        }
        return longitude + "," + latitude;
    }

    //從網絡擷取經緯度
    public String getLngAndLatWithNetwork(Context context) {
        double latitude = 0.0;
        double longitude = 0.0;
        LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return "沒有網絡Internet擷取權限";
        }
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, locationListener);
        Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
        if (location != null) {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }
        return longitude + "," + latitude;
    }

    LocationListener locationListener = new LocationListener() {

        // Provider的狀态在可用、暫時不可用和無服務三個狀态直接切換時觸發此函數
        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

        // Provider被enable時觸發此函數，比如GPS被打開
        @Override
        public void onProviderEnabled(String provider) {

        }

        // Provider被disable時觸發此函數，比如GPS被關閉
        @Override
        public void onProviderDisabled(String provider) {

        }

        //當坐标改變時觸發此函數，如果Provider傳進相同的坐标，它就不會被觸發
        @Override
        public void onLocationChanged(Location location) {
        }
    };


}