Question

例如，用户设置他想要通知的日期（接收电影结束的推送通知）。为此，我将电影的 id 设置为BroadcastReceiver，我还会拍摄电影的名称 ;使用它作为广播接收器的文本消息，例如，“movieName out out”，方法是SetAlarm（）。注意：我的应用程序不需要对电影做任何事情，我说的一般。

public void setAlarm(View view){

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.YEAR, year);
    cal.set(Calendar.MONTH, month);
    cal.set(Calendar.DAY_OF_MONTH, day);


    Intent alertIntent = new Intent(this, AlertReceiver.class);
    alertIntent.putExtra("id", mainId);
    alertIntent.putExtra("name", name);


    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);


    alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
            PendingIntent.getBroadcast(this, 1, alertIntent,
                    PendingIntent.FLAG_UPDATE_CURRENT));
}

正如你所看到的那样，我正在将一部电影的id和名称传递给AlertReceiver类

public class AlertReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    int id = intent.getIntExtra("id", 0);
    String name = intent.getStringExtra("name");
    createNotification(context, "Movie",  name + " Now Out" , name, id);
}

public void createNotification(Context context, String msg, String msgText, String msgAlert, int id){

    //intent for MainActivity
    PendingIntent notificIntent = PendingIntent.getActivity(context, 0, new Intent(context, MainActivity.class), 0);

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
            .setContentTitle(msg)
            .setContentText(msgText)
            .setTicker(msgAlert)
            .setSmallIcon(R.mipmap.ic_launcher);

    //the intent when the notification is clicked on
    mBuilder.setContentIntent(notificIntent); //goes to MainActivity

    //how the user will be notified
    mBuilder.setDefaults(NotificationCompat.DEFAULT_LIGHTS);

    //stop notification when it's clicked on
    mBuilder.setAutoCancel(true);

    //now to notify the user with NotificationManager
    NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.notify(id, mBuilder.build());
}

}

它运行良好，用户只有在应用程序仍在后台运行时才会收到通知，但在关闭或重新启动后，广播接收器仍会被调用;用户会收到通知，这表示 id 没有问题，但名称为空，我得到了短信“null is out”。那我怎么能保存这个名字呢？

Answer 1

使用SharedPreference保存用户名。

Answer 2

<强> SharedPreference 下，的磁盘，<强>数据库 ...

如何在BroadcastReceiver中保存数据

2 个答案: