通知用户,当他们到达的地点 [英] Notify users when they reach a location
问题描述
在应用我工作,的特点之一是,当他们到达,他们已经事先设置位置通知用户。
In the application I'm working on, one of the features is to notify the user when they reach a location that they have set prior.
下code为addProximityAlert的活动:
The code below is in addProximityAlert in Activity:
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);
}
}
下面的接收器:
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,但我需要调用 unregisterReceiver
每一次我破坏活动 - 这意味着我的应用程序不再通知用户。但我想,直到他取消,或者已经收到通知,即使他们关闭应用程序通知用户的时候,他是附近的位置。
It works fine, but I need to call unregisterReceiver
every single time I destroy the Activity - that means my application no longer notifies the user. But I want to notify the user when he is near the location until he cancels, or is already notified even if they close the app.
我是什么失踪?
推荐答案
所有我需要做的就是在清单中定义接收器
all i need to do is define receiver in Manifest
然后我不需要注册/注销活动中再
then i don't need to register/unregister in Activity anymore
<receiver android:name="th.clbs.android.broadcastreceiver.LocationReminderReceiver" >
<intent-filter>
<action android:name="th.co.clbs.action.LOCATION_REMINDER" />
</intent-filter>
</receiver>
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