在实际应用开发中，有时候需要简单获取自身的位置，例如创建用户账号时，应用程序可以通过当前位置判断，用户身在哪个国家，由此来判断需要显示给用户什么语言界面，用户需要什么物品等。

package com.example.study.testthread;

import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.util.Log;

import java.util.List;

import static android.content.ContentValues.TAG;

class LocationUtils {

    private volatile static LocationUtils uniqueInstance;
    private LocationManager locationManager;
    private String locationProvider;
    private Location location;
    private Context mContext;

    private LocationUtils(Context context) {
        mContext = context;
        getLocation();
    }

    //DLC Single Model
    public static LocationUtils getInstance(Context context) {
        if (uniqueInstance == null) {
            synchronized (LocationUtils.class) {
                if (uniqueInstance == null) {
                    uniqueInstance = new LocationUtils(context);
                }
            }
        }
        return uniqueInstance;
    }

    @SuppressLint("MissingPermission")
    private void getLocation() {
        locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
        //Get a location provider, GPS, or NetWork
        List<String> providers = locationManager.getProviders(true);
        if (providers.contains(LocationManager.NETWORK_PROVIDER)) {
            // NetWork Location
            Log.d(TAG, "NetWork Location");
            locationProvider = LocationManager.NETWORK_PROVIDER;
        } else if (providers.contains(LocationManager.GPS_PROVIDER)) {
            //GPS Location
            Log.d(TAG, "GPS Location");
            locationProvider = LocationManager.GPS_PROVIDER;
        } else {
            Log.d(TAG, "No locator is available");
            return;
        }

        if (Build.VERSION.SDK_INT >= 23
                && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED
                && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED
                && ActivityCompat.checkSelfPermission(mContext,
                Manifest.permission.ACCESS_COARSE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        @SuppressLint("MissingPermission") Location location = locationManager.getLastKnownLocation(locationProvider);
        if (location != null) {
            setLocation(location);
        }
        //Monitor geographic location changes
        locationManager.requestLocationUpdates(locationProvider, 0, 0, locationListener);
    }

    private void setLocation(Location location) {
        this.location = location;
        String address = "precision：" + location.getLatitude() + "longitude：" + location.getLongitude();
        Log.d(TAG, address);
    }

    //Get latitude and longitude
    public Location showLocation() {
        return location;
    }



    LocationListener locationListener = new LocationListener() {

        @Override
        public void onStatusChanged(String provider, int status, Bundle arg2) {

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

        }

        @Override
        public void onLocationChanged(Location location) {
            location.getAccuracy();//precision
            setLocation(location);
        }
    };

}

开启定位需要权限申请，在android 6.0以下，只需要在AndroidManifest.xml文件下声明以下代码就可以了：

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

而在android 6.0以上的系统，不仅仅要在AndroidManifest.xml声明，更需要去申请动态权限，也就是需要增加提示框告诉用户，你需要定位权限，并得到用户允许才可以使用
动态权限检查，当没有这个权限时，提示用户需要获取：

//check permissions
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
   != PackageManager.PERMISSION_GRANTED&& ActivityCompat.checkSelfPermission
   (this, Manifest.permission.ACCESS_COARSE_LOCATION!= PackageManager.PERMISSION_GRANTED) {

｝else {
//Return successfu permissions status and Status code
ActivityCompat.requestPermissions(thisActivity,
                new String[]{Manifest.permission.READ_CONTACTS}, REQUEST_CODE);
}

并获得用户的回答时候，进行回调判断。系统自动判断，需要返回权限状态码等

public void onRequestPermissionsResult(int requestCode,
        String permissions[], int[] grantResults) {
｝

Manifest.permission后接需要申请的权限名称
Android权限大全
android 需要动态申请的权限：