Android地图获取位置

Android地图获取位置

• 1.首先获取LocationManager管理类

LocationManager locationManager = (LocationManager)getSystemServices(Context.LOCATION_SERVICE);

• 2.获得支持哪些定位服务

String provider = LocationManager.GPS_PROVIDER;

• 3.获得Location类，里面包含经纬度信息

Location location=locationManager.getLastknowLocation(provider);

• 4.添加权限

完整代码部分

package com.example.kevin.locationtest;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import java.util.List;

public class MainActivity extends AppCompatActivity {
    private TextView locationView;
    private LocationManager locationManager;
    private String provider;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        locationView = (TextView) findViewById(R.id.location_view);
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        List locationList = locationManager.getProviders(true);
        if (locationList.contains(LocationManager.GPS_PROVIDER)) {
            provider = LocationManager.GPS_PROVIDER;
        } else if (locationList.contains(LocationManager.NETWORK_PROVIDER)) {
            provider = LocationManager.NETWORK_PROVIDER;
        } else {
            Toast.makeText(getApplicationContext(), "没有可用的定位服务", Toast.LENGTH_LONG).show();
        }

        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.
            return;
        }
        Location location = locationManager.getLastKnownLocation(provider);
        if (location != null) {
            showLocation(location);
        }
        /**
         * 第一个参数是提供定位的方式
         * 第二个参数是多少秒刷新
         * 第三个参数是移动多少距离
         * 第四个参数是监听器
         */
        locationManager.requestLocationUpdates(provider, 5000, 1, locationListener);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //将监听器移除
        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.
            return;
        }
        locationManager.removeUpdates(locationListener);
    }

    LocationListener locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            showLocation(location);
        }

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

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

        }
    };

    private void showLocation(Location location) {
        String content = "--->" + location.getLatitude() + "\n" + location.getLongitude();
        locationView.setText(content);
    }
}