Android使用网络获取定位的方法

Z时代
2024-01-10
分类：IT

本文实例为大家分享了Android使用网络获取定位的具体代码，供大家参考，具体内容如下

目标效果：

程序运行弹出权限选择，选择运行网络定位后会查询位置，然后在TextView上显示当前国家和城市。

1.activity_main.xml页面定义TextView显示城市名。

activity_main.xml页面：


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" >
  <TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="正在定位。。。" />
</RelativeLayout>

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<Address> 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：


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.sc.demo"
  android:versionCode="1"
  android:versionName="1.0" >
  <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />
  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
  <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
      android:name="com.sc.demo.MainActivity"
      android:label="@string/app_name" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <service android:name=".locate.LocationSvc" />
  </application>
</manifest>