将数据发送到警报管理器广播接收器

Question

我在这里遗漏了一些东西,我希望有人可以帮助我.我正在使用以下设置警报:

    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

    Intent broadcast_intent = new Intent(this, AlarmBroadcastReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,  broadcast_intent, 0);

    broadcast_intent.putExtra("test", "ValueReceived"); //data to pass
    Date date = someVariable.getDateTime();


    long triggerAtTime = date.getTime();

    alarmManager.set(AlarmManager.RTC_WAKEUP, triggerAtTime, pendingIntent);

以及使用以下内容的广播接收器:

public class AlarmBroadcastReceiver extends BroadcastReceiver{

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

        Toast.makeText(context, "Alarm has been received "+intent.getStringExtra("test"), Toast.LENGTH_LONG).show();

    }

}

然而,意图显然是"空洞的".我看到getStringExtra的空值.因此数据不会传递给广播接收器.我究竟做错了什么？我怎样才能传递数据.

非常感谢

Answer 1

在将其传递给PendingIntent 之前,需要将其添加到Intent :

Intent broadcast_intent = new Intent(this, AlarmBroadcastReceiver.class);
broadcast_intent.putExtra("test", "ValueReceived"); //data to pass

PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,  broadcast_intent, 0);