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我正在尝试构建一个代码，当用户靠近某个位置时启动通知。我用谷歌搜索了这个主题，但找不到解决方案。我正在使用以下代码，但它不起作用。

下面的代码是我的 Location 类，它的内部类是 MyLocationListener，它实现了 LocationListener

` @Override public void onLocationChanged(Location loc)
{
CharSequence from = "AlarmManager - Time's up!";
CharSequence message = "这是你的警报"; 

    loc.getLatitude();
    loc.getLongitude();

    String Text = "My current location is: " +
    "Latitud = " + loc.getLatitude() +
    "Longitud = " + loc.getLongitude();
    float radius = 500; //Distance in meters

      Location location1 = new Location("GPS");
      location1.setLatitude(loc.getLatitude());
      location1.setLongitude(location1.getLongitude());

      Location location2 = new Location("GPS");
      location2.setLatitude(22.727739);
      location2.setLongitude(75.886074);

      Float distance = location1.distanceTo(location2);
      distance = Math.abs(distance);
       if(distance < radius)
        {
            Log.d("sdsd", "task location");         
            notMan = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            Notification n = new Notification(R.drawable.ic_launcher, "Click here for details", System.currentTimeMillis());

            Intent notificationIntent = new Intent(Location_Gps.this,Location_Gps.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(Location_Gps.this, 0, notificationIntent, 0);

         n.setLatestEventInfo(Location_Gps.this, from,message, pendingIntent);
           notMan.notify(10001, n);

        }

    Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
  }

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1 回答 1

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我正在尝试构建一个代码，当用户靠近某个位置时启动通知。

使用LocationListener和addProximityAlert()。

于 2012-04-29T19:49:41.437 回答