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如何在Android中通过网络获取定位

发表于:2022-12-07 作者:安全数据网编辑
编辑最后更新 2022年12月07日,如何在Android中通过网络获取定位?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。1.activity_main.xml页面定义Tex

如何在Android中通过网络获取定位?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。

1.activity_main.xml页面定义TextView显示城市名。

activity_main.xml页面:

    

2.新建Common.java页面,设置公共常量。

Common.java页面:

package com.sc.demo.common;/** * 公共常量 * @author wxy * */public class Common {  public static final String LOCATION = "location"; public static final String LOCATION_ACTION = "locationAction";}

3.新建LocationSvc.java页面作为服务进行定位。

LocationSvc.java页面:

package com.sc.demo.locate; import com.sc.demo.common.Common; import android.app.Service;import android.content.Intent;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.os.IBinder;import android.util.Log;import android.widget.Toast; /** * 定位服务 * @author wxy * */public class LocationSvc extends Service implements LocationListener {  private LocationManager locationManager;  @Override public IBinder onBind(Intent intent) { return null; }  @Override public void onCreate() { locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); }  @Override public void onStart(Intent intent, int startId) { if (locationManager.getProvider(LocationManager.NETWORK_PROVIDER) != null) locationManager  .requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,   this); else if (locationManager.getProvider(LocationManager.GPS_PROVIDER) != null) locationManager  .requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,   this); else Toast.makeText(this, "无法定位", Toast.LENGTH_SHORT).show(); }  @Override public boolean stopService(Intent name) { return super.stopService(name); }  @Override public void onLocationChanged(Location location) {  //通知Activity Intent intent = new Intent(); intent.setAction(Common.LOCATION_ACTION); intent.putExtra(Common.LOCATION, location.toString()); sendBroadcast(intent);  // 如果只是需要定位一次,这里就移除监听,停掉服务。如果要进行实时定位,可以在退出应用或者其他时刻停掉定位服务。 locationManager.removeUpdates(this); stopSelf(); }  @Override public void onProviderDisabled(String provider) { }  @Override public void onProviderEnabled(String provider) { }  @Override public void onStatusChanged(String provider, int status, Bundle extras) { } }

4.MainActivity.java页面获取经纬度,然后根据经纬度获取城市名。

MainActivity.java页面:

package com.sc.demo; import java.io.IOException;import java.util.List; import com.sc.demo.common.Common;import com.sc.demo.locate.LocationSvc; import android.location.Address;import android.location.Geocoder;import android.os.Bundle;import android.util.Log;import android.widget.TextView;import android.app.Activity;import android.app.ProgressDialog;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter; public class MainActivity extends Activity {  private TextView text; private ProgressDialog dialog;  @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); text = (TextView) findViewById(R.id.text);  // 注册广播 IntentFilter filter = new IntentFilter(); filter.addAction(Common.LOCATION_ACTION); this.registerReceiver(new LocationBroadcastReceiver(), filter);  // 启动服务 Intent intent = new Intent(); intent.setClass(this, LocationSvc.class); startService(intent);  // 等待提示 dialog = new ProgressDialog(this); dialog.setMessage("正在定位..."); dialog.setCancelable(true); dialog.show(); }  private class LocationBroadcastReceiver extends BroadcastReceiver {  @Override public void onReceive(Context context, Intent intent) {  if (!intent.getAction().equals(Common.LOCATION_ACTION))  return;  String locationInfo = intent.getStringExtra(Common.LOCATION);  double latitude = Double                 //截取经纬度转换为double型   .parseDouble(locationInfo.substring(17, 26));  double longitude = Double.parseDouble(locationInfo   .substring(27, 37));  text.setText(getaddress(latitude, longitude));  dialog.dismiss();  MainActivity.this.unregisterReceiver(this);// 不需要时注销 }  public String getaddress(double latitude, double longitude) {  String cityName = "";  List
addList = null; Geocoder ge = new Geocoder(MainActivity.this); try { addList = ge.getFromLocation(latitude, longitude, 1); } catch (IOException e) { e.printStackTrace(); } if (addList != null && addList.size() > 0) { for (int i = 0; i < addList.size(); i++) { Address ad = addList.get(i); cityName += ad.getCountryName() + ";" + ad.getLocality(); } } Log.i("wxy", "city:" + cityName); return cityName; } }}

5.AndroidManifest.xml页面添加权限并声明服务。

AndroidManifest.xml页面:

                                                        

看完上述内容,你们掌握如何在Android中通过网络获取定位的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注行业资讯频道,感谢各位的阅读!

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