Android:在特定时间触发 Notification.Builder

Question

我有一个 Notification.Builder，它会在我单击按钮时立即向通知栏发送一条消息。有没有办法让通知出现在选定的时间？我查看了 Android 文档，但没有看到任何看起来可行的东西。

这是我的代码 fragment :

        Notification n = new Notification.Builder(this)
            .setContentTitle("Random title")
            .setContentText("Random text")
            .setSmallIcon(R.drawable.abc_ic_go_search_api_mtrl_alpha)
            .setContentIntent(pIntent).build();

    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

    notificationManager.notify(0, n);

谢谢!

Answer 1

1) 使用您的通知代码创建一个广播接收器。

public class AlarmReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

        Notification notification = new NotificationCompat.Builder(context)
                .setContentTitle("Random title")
                .setContentText("Random text")
                .setSmallIcon(R.drawable.abc_ic_go_search_api_mtrl_alpha)
                .setContentIntent(PendingIntent.getActivity(context, 0, new Intent(context, MyActivity.class), 0))
                .build();

        notificationManager.notify(0, notification);
    }
}

2) 使用 AlarmManager 为您的广播接收器广播 Intent 安排警报。

AlarmManager alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
// set for 30 seconds later
alarmMgr.set(AlarmManager.RTC, Calendar.getInstance().getTimeInMillis() + 30000, alarmIntent);