Android GPS 接近警报不起作用 [英] Android GPS proximity alert not working

问题描述

我正在尝试设置最基本的接近警报，但似乎没有任何反应.我对 Android 编程相当陌生，所以请让我知道我做错了什么或者我错过了什么.我从这里的一些源代码和 这个.这是我的代码:

I'm trying to set up the most basic proximity alert, but nothing seems to happen. I'm fairly new to Android programming, so please let me know what I'm doing wrong or what am I missing. I got inspired from some source codes out here and this one. Here's my code:

package com.example.proximityalert;

import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

public class MainActivity extends Activity {

    private static final String PROX_ALERT_INTENT = "com.example.proximityalert";
    private IntentReceiver locationReminderReceiver;

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


         Intent intent = new Intent(PROX_ALERT_INTENT);
         PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, PendingIntent.FLAG_ONE_SHOT);

         LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
         locationManager.addProximityAlert(55.586301,13.045417, 200, -1, pendingIntent);

         this.locationReminderReceiver = new IntentReceiver();

         final IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
         this.registerReceiver(this.locationReminderReceiver, filter);

    }
}

和接收者

package com.example.proximityalert;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.location.LocationManager;
import android.util.Log;
import android.widget.Toast;

public class IntentReceiver extends BroadcastReceiver{  

//     @SuppressWarnings("deprecation")
       @Override
       public void onReceive(Context context, Intent intent) {


          String key = LocationManager.KEY_PROXIMITY_ENTERING;

          Boolean entering = intent.getBooleanExtra(key, false);

          if (entering) {
              Toast.makeText(context, "LocationReminderReceiver entering", Toast.LENGTH_SHORT).show();
              Log.i("LocationReminderReceiver", "entering");
          } else {
              Toast.makeText(context, "LocationReminderReceiver exiting", Toast.LENGTH_SHORT).show();
              Log.i("LocationReminderReceiver", "exiting");
          }
       }
    }

推荐答案

这是我用来获取接近警报的服务，欢迎您使用它，它不需要清单中的接收者，只需要服务

This is the service that i use to get proximity alerts, your welcome to use it, it doesnt need the reciever in the manifest, just the service

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.graphics.Color;
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;


public class ProximityService extends Service{
String proximitysd = "com.apps.ProximityService";
int n = 0;
private BroadcastReceiver mybroadcast;
private LocationManager locationManager;
MyLocationListener locationListenerp;
public ProximityService() {


}

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}
@Override
public void onCreate() {
    mybroadcast = new ProximityIntentReceiver();
    locationManager = (LocationManager) 
            getSystemService(Context.LOCATION_SERVICE);





    double lat;
    double lng;
    float radius = 50f;
    long expiration = -1;
     MyDBAdapter db = new MyDBAdapter(this);
        Cursor cursor;
        db.read();
        cursor = db.getAllEntries();
        boolean go = cursor.moveToFirst();
        while(cursor.isAfterLast() != true){
            lat = cursor.getInt(MyDBAdapter.LATITUDE_COLUMN)/1E6;
            lng = cursor.getInt(MyDBAdapter.LONGITUDE_COLUMN)/1E6;
            String what = cursor.getString(MyDBAdapter.ICON_COLUMN);
            String how = cursor.getString(MyDBAdapter.FISH_COLUMN);
            String proximitys = "com.apps.ProximityService" + n;
            IntentFilter filter = new IntentFilter(proximitys);
            registerReceiver(mybroadcast, filter );

            Intent intent = new Intent(proximitys);

            intent.putExtra("alert", what);
            intent.putExtra("type", how);
            PendingIntent proximityIntent = PendingIntent.getBroadcast(this, n, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            locationManager.addProximityAlert(lat, lng, radius, expiration, proximityIntent);
            //sendBroadcast(new Intent(intent));

            n++;
            cursor.moveToNext();
        }
        db.close();
        cursor.close();
}

@Override
public void onDestroy() {
    Toast.makeText(this, "Proximity Service Stopped", Toast.LENGTH_LONG).show();
    try{
        unregisterReceiver(mybroadcast);
    }catch(IllegalArgumentException e){
        Log.d("reciever",e.toString());
    }


}
@Override
public void onStart(Intent intent, int startid) {
    Toast.makeText(this, "Proximity Service Started", Toast.LENGTH_LONG).show();
    //IntentFilter filter = new IntentFilter(proximitys);
    //registerReceiver(mybroadcast,filter);


}
public class ProximityIntentReceiver extends BroadcastReceiver{
     private static final int NOTIFICATION_ID = 1000;
    @Override
    public void onReceive(Context arg0, Intent arg1) {
        String key = LocationManager.KEY_PROXIMITY_ENTERING;

        Boolean entering = arg1.getBooleanExtra(key, false);
        String here = arg1.getExtras().getString("alert");
        String happy = arg1.getExtras().getString("type");



         NotificationManager notificationManager = 
                    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

                PendingIntent pendingIntent = PendingIntent.getActivity(arg0, 0, arg1, 0);        

                Notification notification = createNotification();

                notification.setLatestEventInfo(arg0, 
                    "Entering Proximity!", "You are approaching a " + here + " marker.", pendingIntent);

                notificationManager.notify(NOTIFICATION_ID, notification);


            }

            private Notification createNotification() {
                Notification notification = new Notification();

                notification.icon = R.drawable.icon;
                notification.when = System.currentTimeMillis();

                notification.flags |= Notification.FLAG_AUTO_CANCEL;
                notification.flags |= Notification.FLAG_SHOW_LIGHTS;

                notification.defaults |= Notification.DEFAULT_VIBRATE;
                notification.defaults |= Notification.DEFAULT_LIGHTS;

                notification.ledARGB = Color.WHITE;
                notification.ledOnMS = 1500;
                notification.ledOffMS = 1500;


                return notification;
            }
        //make actions



}
 public class MyLocationListener implements LocationListener {
        public void onLocationChanged(Location location) {
            Toast.makeText(getApplicationContext(), "I was here", Toast.LENGTH_LONG).show();
        }

        public void onProviderDisabled(String s) {
        }
        public void onProviderEnabled(String s) {            
        }
        @Override
        public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
            // TODO Auto-generated method stub

        }
    }

}

您必须替换数据库查询和一些代码以适应您的应用程序，这是针对多个邻近警报，这就是 n 增加的原因.

you would have to replace the database query and some of the code to fit your app, this is for multiple proximity alerts thats why there is the increment of n.

这篇关于Android GPS 接近警报不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！