1

我有一个创建通知的类。类是这样的：

public class TimeAlarm extends BroadcastReceiver {

     NotificationManager nm;

     @Override
     public void onReceive(Context context, Intent intent) {
      nm = (NotificationManager) context
        .getSystemService(Context.NOTIFICATION_SERVICE);
      CharSequence from = "Scheduled Training";
      CharSequence message = "Please attend the scheduled training";
      //Intent notifyIntent = new Intent();



      PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(), 0);

      Notification notif = new Notification(R.drawable.ic_launcher,
        "NeuroQ Scheduled Training", System.currentTimeMillis());
      notif.setLatestEventInfo(context, from, message, contentIntent);
      nm.notify(1, notif);


     }
    }

我有一个名为：QuizScreen的活动，单击通知时需要打开它。我试过使用：

Intent quiz_intent = new Intent(TimeAlarm.this, QuizScreen.class);
                        TimeAlarm.this.startActivity(quiz_intent);

但我收到此错误：

The constructor Intent(TimeAlarm, Class<QuizScreen>) is undefined

我哪里错了？我应该如何解决这个问题？

4

4 回答 4

3

使用Intent quiz_intent = new Intent(context, QuizScreen.class);代替Intent quiz_intent = new Intent(TimeAlarm.this, QuizScreen.class);例如，

public class MyBroadcastReceiver extends BroadcastReceiver {
  private NotificationManager mNotificationManager;
  private int SIMPLE_NOTFICATION_ID;

  @Override
  public void onReceive(Context context, Intent intent) {
    mNotificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notifyDetails = new Notification(R.drawable.android,"Time Reset!",System.currentTimeMillis());
    PendingIntent myIntent = PendingIntent.getActivity(context, 0, new Intent(context, Second.class), 0);
    notifyDetails.setLatestEventInfo(context, "Time changed", "Click on me to view my second activity", myIntent);
    notifyDetails.flags |= Notification.FLAG_AUTO_CANCEL;

    mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);
  }
}
于 2013-01-18T20:16:54.327 回答
1

广播接收器不算作上下文？改用 onReceive(Context context, Intent intent) 中的 context 参数

于 2013-01-18T19:27:38.693 回答
1

尝试下面的代码开始活动

Intent quiz_intent = new Intent(context, QuizScreen.class);
                        TimeAlarm.this.startActivity(quiz_intent);

基本上正如 Nicklas 所建议的那样，Receiver 不算作上下文，所以你需要使用你进入 onReceive 方法的上下文，或者像 context.getApplicationContext 一样使用它。

于 2013-01-18T19:31:59.553 回答
0

使用 : Intent quiz_intent = new Intent(context, QuizScreen.class);而不是Intent quiz_intent = new Intent(TimeAlarm.this, QuizScreen.class);

例如：

public class MyBroadcastReceiver extends BroadcastReceiver {

private NotificationManager mNotificationManager;
private int SIMPLE_NOTFICATION_ID;

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

    mNotificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notifyDetails = new Notification(R.drawable.android,"Time Reset!",System.currentTimeMillis());
    PendingIntent myIntent = PendingIntent.getActivity(context, 0, new Intent(context, Second.class), 0);
    notifyDetails.setLatestEventInfo(context, "Time changed", "Click on me to view my second activity", myIntent);
    notifyDetails.flags |= Notification.FLAG_AUTO_CANCEL;

    mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);`
于 2013-01-18T20:27:58.017 回答