定期在android发送当前位置到服务器

Question

我必须定期向服务器发送我目前的位置详细信息（例如，经纬度：&）（例如：每5分钟）。有没有最好的方法？我知道如何获取当前位置&如何将详细信息发送到服务器。但是，我如何周期性地重复此操作？

Answer 1

当用户第一次打开应用程序时，使用AlarmManager在5分钟后唤醒警报。创建服务（获取位置并更新到服务器）以在警报通知您的应用程序时运行。服务完成后，再次注册闹钟，5分钟后唤醒。通过这种方式你可以实现你的任务。

REF

Android: How to periodically send location to a server

http://developer.android.com/reference/android/app/AlarmManager.html

http://developer.android.com/reference/android/app/Service.html

第一编辑 - 添加代码示例

步骤1 - 创建警报管理器和寄存器报警

AlarmManager alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 

Intent intent = new Intent(Main.this, YourWakefulReceiver.class); 
bool flag = (PendingIntent.getBroadcast(Main.this, 0, 
       intent, PendingIntent.FLAG_NO_CREATE)==null); 
/*Register alarm if not registered already*/ 
if(flag){ 
PendingIntent alarmIntent = PendingIntent.getBroadcast(Main.this, 0, 
        intent, PendingIntent.FLAG_UPDATE_CURRENT); 

// Create Calendar obj called calendar 

/* Setting alarm for every one hour from the current time.*/ 
int intervalTimeMillis = 1000 * 60 * 60; // 1 hour 
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, 
         calander.getTimeInMillis(), intervalTimeMillis, 
         alarmIntent); 
} 

2步 - 创建Receiver类

public class YourWakefulReceiver extends WakefulBroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
      Intent service = new Intent(context, SimpleWakefulService.class); 
      startWakefulService(context, service); 
     } 
    } 
} 

SETP 3 - 创建服务类

public class YourService extends IntentService { 

    private static String tagName = "YourService"; 

    public SimpleWakefulService() { 
     super("YourService"); 
    } 

    @Override 
    protected void onHandleIntent(Intent intent) { 
     // Start your location 
     LocationUtil.startLocationListener(); 
     try { 
     // Wait for 10 seconds 
      Thread.sleep(1000*10); 
     } catch (InterruptedException e) { 
     } 
     //Stop location listener 
     LocationUtil.stopLocationListener(); 
     // upload or save location 
     uploadGps(); 

     SimpleWakefulReceiver.completeWakefulIntent(intent); 
    } 

} 

步骤4 - 注册服务和接收机

<service android:name="com.envision.ghari.services.YourService"></service> 
     <receiver android:name="com.envision.ghari.receivers.YourWakefulReceiver"></receiver> 

注意：该代码是了解执行情况。它不会编译。

Answer 2

因为它不需要UI交互，你应该为此创建一个服务，服务将调用requestLocationUpdates方法，在这个方法中，传递参数的最短时间为5分钟。

Answer 3

使用BroadcastReceiver 是发送定期请求的好选择。

Here是一个使用BroadcastReceiver的教程。

Answer 4

使用AlarmManager唤醒服务的最佳方法，并将获取的位置发布到服务器。

Answer 5

我正在开发一个应用程序，该应用程序可以在10秒和15秒内在服务中获取手机的位置，它工作正常，但有时网络提供程序侦听器的方法OnLocationChanged停止被调用。

import android.location.Address; 
    import android.location.Geocoder; 
    import android.support.v7.app.AppCompatActivity; 
    import android.os.Bundle; 
    import android.view.View; 
    import android.widget.AdapterView; 
    import android.widget.ListView; 
    import android.widget.SimpleCursorAdapter; 
    import android.widget.TextView; 


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

    import foodinn.databases.LocationUpdaterDatabase; 

    public class LocationUpdatesActivity extends AppCompatActivity { 
     private LocationUpdaterDatabase locationUpdaterDatabase; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_location_updates); 

      locationUpdaterDatabase = new LocationUpdaterDatabase(this, "Locations.db", null, 1); 

      final Geocoder geocoder = new Geocoder(this); 

      ListView listView = (ListView) findViewById(R.id.locationUpdatesListView); 

      listView.setAdapter(new SimpleCursorAdapter(this, R.layout.location_updates_list_view_view, locationUpdaterDatabase.getLocationUpdates(), new String[] {"latitude", "longitude", "whenUpdated"}, new int[] {R.id.listViewTextView1, R.id.listViewTextView2, R.id.listViewTextView3}, SimpleCursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER)); 

      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
        double latitude = Double.valueOf(((TextView) view.findViewById(R.id.listViewTextView1)).getText().toString()); 
        double longitude = Double.valueOf(((TextView) view.findViewById(R.id.listViewTextView2)).getText().toString()); 

        try { 
         List<Address> addressList = geocoder.getFromLocation(latitude, longitude, 1); 

         String address = addressList.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex() 
         String city = addressList.get(0).getLocality(); 
         String state = addressList.get(0).getAdminArea(); 
         String country = addressList.get(0).getCountryName(); 
         String postalCode = addressList.get(0).getPostalCode(); 
         String knownName = addressList.get(0).getFeatureName(); 

         ((TextView) view.findViewById(R.id.listViewTextView4)).setText(address + ", " + city + ", " + country); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
       } 
      }); 
     } 
    }