无法从意图中获取额外值

Question

我知道，要放入值，我可以intent.putExtra（key,value)，要检索值，我可以intent.getStringExtra（key），但在下面的代码中，它的行为不像预期的那样。检索值时，我获得nullpointer，printLn需要一个消息。

设置值的代码：

public void SetAlarm(Context context, int seconds, String type) {
    CustomLog.logBlue(Thread.currentThread().getStackTrace(), "set alarm");

    AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

    Intent intent = new Intent(context, AlarmManagerBroadcastReceiver.class);
    intent.putExtra(ONE_TIME, Boolean.FALSE); //ONE_TIME = "oneTime"
    intent.putExtra("c", "ayush");

    PendingIntent pi = PendingIntent.getBroadcast(context, 0, intent, 0);
    am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), seconds * 1000, pi);

    CustomNotification.generateNotification(1, context, "Tracking enabled");
}

并且我正在检索BroadCaseReceiver的onReceive中的值:[省略的无关代码]

@Override
public void onReceive(Context context, Intent intent) {
     Bundle extras = intent.getExtras();
     Log.e("test", extras.getString("c"); <------ ERROR
     // also tried intent.getStringExtra("c");
}

Answer 1

调用PendingIntent.getBroadcast（）时使用标志FLAG_UPDATE_CURRENT。在您的代码中：

PendingIntent pi = PendingIntent.getBroadcast(
                                 context, 0, intent, 
                                 PendingIntent.FLAG_UPDATE_CURRENT);