GPS

https://github.com/westlifeChen/GPS-Demo
https://blog.csdn.net/tdstds/article/details/50517515
https://www.kancloud.cn/alex_wsc/android-wifi-nfc-gps/414153
https://www.cnblogs.com/ljf181275034/articles/3238087.html
<!-- 网络权限和GPS权限 -->
    <!-- 连接互联网Internet权限 -->
    <uses-permission android:name="android.permission.INTERNET" />
    <!-- GPS定位权限 -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>


import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
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.location.LocationProvider;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private TextView mLocationone;
    private TextView mLocationtwo;
    private Context context;
    String latLongString;
    String placename="";
    List<Address> places=null;
    private double longitude;
    private double latitude;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = this;
        /*if (Build.VERSION.SDK_INT > 22) {
            checkPermission();
            initView();
        }*/
        initView();
    }

    private void checkPermission() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 200);
        }
        return;
    }

    private void initView() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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.
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.READ_PHONE_STATE}, 200);
            Log.e("11111111", "已经获取到权限");
            return;
        }

        mLocationone = findViewById(R.id.location_one);
        mLocationtwo = findViewById(R.id.location_two);

        //获取LocationManager
        LocationManager lManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        Log.e("11111111", "lManager" + lManager);
        Criteria criteria = new Criteria();
        Log.e("11111111", "criteria:" + criteria);
        criteria.setAccuracy(Criteria.ACCURACY_FINE);//高精度
        criteria.setAltitudeRequired(false);//不要求海拔
        criteria.setBearingRequired(false);//不要求方位
        criteria.setCostAllowed(false);//允许有花费
        criteria.setPowerRequirement(Criteria.POWER_LOW);//低功耗

        lManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 5, new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                if (location != null) {
                    //经度
                    longitude = location.getLongitude();
                    //纬度
                    latitude = location.getLatitude();
                    //海拔
                    double altitude = location.getAltitude();
                    Log.e("11111111", longitude + "    " + latitude);
                    mLocationone.setText("经度:==>" + longitude + "\n纬度:==>" + latitude);
                    Log.e("有GPS信息", "经度:==>" + longitude + " \n 纬度==>" + latitude);
                    Log.e("获取的位置11111111",location.toString()+"    1111");

                    Geocoder geocoder = new Geocoder(MainActivity.this,Locale.getDefault());
                    try {
                        places = geocoder.getFromLocation(latitude, longitude, 5);
                        Toast.makeText(MainActivity.this, places.size() + "", Toast.LENGTH_LONG).show();
                        Log.e("11111111","    "+places.toString());
                    } catch (IOException e) {
                        e.printStackTrace();
                        Log.e("11111111","    "+places.toString());
                    }

                    if (places != null && places.size() > 0) {
                        // placename=((Address)places.get(0)).getLocality();
                        Log.e("11111111",places.get(0).getLocality()+"");
                        //一下的信息将会具体到某条街
                        //其中getAddressLine(0)表示国家，getAddressLine(1)表示精确到某个区，getAddressLine(2)表示精确到具体的街
                        for (int i = 0; i < places.size(); i++) {
                            placename = places.get(0).getAddressLine(0) + ", " + System.getProperty("line.separator")
                                    + places.get(0).getAddressLine(1) + ", "
                                    + places.get(0).getAddressLine(2);
                        }
                    }
                    latLongString = "纬度:" + latitude + "/n经度:" + longitude;
                    Toast.makeText(MainActivity.this, placename, Toast.LENGTH_LONG).show();
                    mLocationtwo.setText("当前位置"+placename);
                } else {
                    Log.e("没有GPS信息", "没有GPS信息");
                }
            }

            @Override
            public void onStatusChanged(String s, int i, Bundle bundle) {
                switch (i) {
                    case LocationProvider.AVAILABLE:
                        Toast.makeText(context, "当前GPS为可用状态!", Toast.LENGTH_SHORT).show();
                        break;
                    case LocationProvider.OUT_OF_SERVICE:
                        Toast.makeText(context, "当前GPS不在服务内", Toast.LENGTH_SHORT).show();
                        break;
                    case LocationProvider.TEMPORARILY_UNAVAILABLE:
                        Toast.makeText(context, "当前GPS为暂停服务状态", Toast.LENGTH_SHORT).show();
                        break;
                }
            }

            @Override
            public void onProviderEnabled(String s) {
                Toast.makeText(context, "GPS开启了", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onProviderDisabled(String s) {
                Toast.makeText(context, "GPS关闭了", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

<TextView
        android:id="@+id/location_one"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#000"/>
    <TextView
        android:id="@+id/location_two"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#000"/>