Android 获取经纬度同时获取当前具体城市信息

「爱情、让人受尽委屈。」 2022-05-15 05:45 398阅读 0赞

**本博客内容**

1.  获取经纬度，显示到界面
2.  获取城市信息，通过吐司显示。如宁夏回族自治区银川市…

**具体代码**

1.  AndroidManifest.xml

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

1.  Main2Activity.java

package com.example.tnt.gps;
    
    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.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 Main2Activity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main2);
            LocationManager locationManager;
            String serviceName = Context.LOCATION_SERVICE;
            locationManager = (LocationManager) getSystemService(serviceName);
    //                String provider = LocationManager.GPS_PROVIDER;  
    //                String provider = "gps";  
    
            Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_FINE);
            criteria.setAltitudeRequired(false);
            criteria.setBearingRequired(false);
            criteria.setCostAllowed(true);
            criteria.setPowerRequirement(Criteria.POWER_LOW);
            String provider = locationManager.getBestProvider(criteria, true);
    
            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);
            updateWithNewLocation(location);
            locationManager.requestLocationUpdates(provider, 2000, 10, locationListener);
    
        }
        private final LocationListener locationListener = new LocationListener() {
            public void onLocationChanged(Location location) {
                updateWithNewLocation(location);
            }
    
            public void onProviderDisabled(String provider) {
                updateWithNewLocation(null);
            }
    
            public void onProviderEnabled(String provider) {
            }
    
            public void onStatusChanged(String provider, int status, Bundle extras) {
            }
        };
    
        private void updateWithNewLocation(Location location) {
            String latLongString;
            TextView myLocationText;
            myLocationText = findViewById(R.id.myLocationText);
    //                try {
    //                        Thread.sleep(0);//因为真机获取gps数据需要一定的时间，为了保证获取到，采取系统休眠的延迟方法
    //                } catch (InterruptedException e) {
    //                        e.printStackTrace();
    //                        throw new RuntimeException(e);
    //                }
            if (location != null) {
                double lat = location.getLatitude();
                double lng = location.getLongitude();
    
                Geocoder geocoder=new Geocoder(this);
                List places = null;
    
                try {
                    places = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 5);
                    Toast.makeText(Main2Activity.this, places.size()+"", Toast.LENGTH_LONG).show();
                    System.out.println(places.size()+"");
                } catch (Exception e) {
                    e.printStackTrace();
                }
    
                String placename = "";
                if (places != null && places.size() > 0) {
                    // placename=((Address)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
                    placename = ((Address) places.get(0)).getAddressLine(0) + ", " + System.getProperty("line.separator")
                            + ((Address) places.get(0)).getAddressLine(1) + ", "
                            + ((Address) places.get(0)).getAddressLine(2);
                }
    
                latLongString = "纬度:" + lat + "/n经度:" + lng;
                Toast.makeText(Main2Activity.this, placename, Toast.LENGTH_LONG).show();
            } else {
                latLongString = "无法获取地理信息";
            }
            myLocationText.setText("您当前的位置是:/n" + latLongString);
        }
    }