android – 当用户到达某个位置时通知他们

在我正在处理的应用程序中,其中一个功能是在用户到达之前设置的位置时通知用户.

以下代码位于Activity中的addProximityAlert中：

final Intent intent = new Intent(PROX_ALERT_INTENT);
final PendingIntent pendingIntent = PendingIntent.getBroadcast(
        InfoActivity.this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
LocationManager locationManager = (LocationManager) this
        .getSystemService(Context.LOCATION_SERVICE);
locationManager.addProximityAlert(18.7726271, 98.9738381, 5000, -1,
        pendingIntent);
this.locationReminderReceiver = new LocationReminderReceiver();
final IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
this.registerReceiver(this.locationReminderReceiver, filter);

@Override
protected void onPause() {
    super.onPause();
    if (this.locationReminderReceiver != null) {
        Log.i("unregisterReceiver", "unregisterReceiver");
        this.unregisterReceiver(this.locationReminderReceiver);
    }
}

这是接收器：

public class LocationReminderReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    final String key = LocationManager.KEY_PROXIMITY_ENTERING;
    final 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");
    }
}
}

它工作正常,但我每次销毁Activity时都需要调用unregisterReceiver – 这意味着我的应用程序不再通知用户.但是我希望在他离开该位置时通知用户,直到他取消,或者即使他们关闭应用程序也已经通知.

我错过了什么？

解决方法:

如果用户关闭了您的活动,您应该取消注册您的位置监听器.

听起来您需要移动部分应用程序(监视位置并警告用户的位)到后台服务,以便即使在用户关闭应用程序后它也可以继续运行.

标签：android,locationmanager,gps,android-pendingintent
来源： https://codeday.me/bug/20190901/1785426.html