Question

我正在制作可与AlarmManager一起使用的应用程序。我使用BroadcastReceiver来接收警报。但是首先，我在主活动中调用方法setAlarms（）。我已经检查了断点，并且传递给broadcastreceiver的值不为null，但是当我尝试在BroadcastReceiver本身中获取它们时，它将返回null。这是我的代码：

//MainActivity
 public void SetAlarms()
    {
        ArrayList<TaskItem> dates = TaskUtils.getInstance().getDatedTasksInMillis(this);
        ArrayList<TaskItem> repeating = TaskUtils.getInstance().getRepeatingTasksInMillis(this);

        Intent intent;
        PendingIntent pi;
        AlarmManager manager;

        for (int i = 0; i < dates.size(); i++)
        {
            TaskItem current = dates.get(i); //TASK ITEM IS THE CLASS WHERE I GET THE VALUES
            long millis = current.getDateInMillis();

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                intent = new Intent(getApplicationContext(), NotificationReceiver.class);

                Bundle b = new Bundle();
                b.putInt("ID", current.getID());
                b.putString("Title", current.getDescription());
                b.putString("Description", current.getDescription());
                b.putInt("Tag", current.getTag());

                intent.putExtras(b);

                long minus = 1000 * 60 * current.getRemind();
                millis -= minus;

                pi = PendingIntent.getBroadcast(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
                manager = (AlarmManager)getSystemService(ALARM_SERVICE);
                manager.setExact(AlarmManager.RTC_WAKEUP, millis, pi);
            }
      }
}

//BroascastReceiver Class
public class NotificationReceiver extends BroadcastReceiver {

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

        //THIS METHOD ACTIVATES WHEN THE ALARMMANAGER GETS TO CERTAIN TIME

        Intent i = new Intent(context, MainActivity.class);
        i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

        Bundle b = i.getExtras();

        int id = b.getInt("ID");
        String title = b.getString("Title");
        String description = b.getString("Description");
        int tag = b.getInt("Tag");

        //BUILDING NOTIFICATION
        NotificationHelper helper = new NotificationHelper(context);
        NotificationCompat.Builder nb = helper.getTaskChannelNotification(id, title, description, tag);
        int RandomNumber = (int) ((new Date().getTime() / 1000L) % Integer.MAX_VALUE);
        helper.getManager().notify(RandomNumber, nb.build());
    }

Answer 1

在NotificationReceiver中，您尝试从新创建的意图中读取附加内容，而不是在onReceive方法中将其作为参数接收。

应该改为intent.getExtras（）而不是i.getExtras（）

意向附加项始终为空

1 个答案: