Question

我试图创建一个从服务器下载（定期）数据的应用程序，并在下载时通知用户。

我尝试使用Toast消息，但我需要在状态栏中显示通知。我使用了developer.android.com中的一些示例代码，单击按钮后会发出通知。但是我需要在不点击按钮的情况下发送通知。

最精确的问题是

如何在＆＃34; .execute＆＃34;之后调用sendNotification。 in＆＃34; run＆＃34;函数，我应该在sendNotification中使用哪些参数（？这里有什么？）？

此h.postDelayed内容采用OnCreate方法。

以下是代码：

h.postDelayed(new Runnable() {
        public void run() {
            new WebServiceHandler()
                    .execute("http://maciekb94.cba.pl/");
                    Toast.makeText(MainActivity.this, "Pobrano dane", Toast.LENGTH_SHORT).show();
                    //sendNotification();
                    h.postDelayed(this, delay);
        }
    },delay);
}

public void sendNotification(View view) {

    Intent intent = new Intent(this,MainActivity.class);
            //Uri.parse("http://developer.android.com/reference/android/app/Notification.html"));
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
    // END_INCLUDE(build_action)
    // BEGIN_INCLUDE (build_notification)

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
    builder.setSmallIcon(R.drawable.ic_stat_new_message);

    // Set the intent that will fire when the user taps the notification.
    builder.setContentIntent(pendingIntent);

    // Set the notification to auto-cancel. This means that the notification will disappear
    // after the user taps it, rather than remaining until it's explicitly dismissed.
    builder.setAutoCancel(true);
    builder.setContentTitle("Pobrano dane");
    builder.setContentText("Wejdź by je zobaczyć");


    NotificationManager notificationManager = (NotificationManager) getSystemService(
            NOTIFICATION_SERVICE);
    notificationManager.notify(NOTIFICATION_ID, builder.build());
    //END_INCLUDE(send_notification)
}

Answer 1

地点：

notificationManager.notify(NOTIFICATION_ID);

在运行功能中。通知更新或创建通知。请参阅：http://developer.android.com/reference/android/app/NotificationManager.html

Answer 2

在WebServiceHandler（）任务的onPostExecute（）中发送通知。

public class WebServiceHandler extends AsyncTask{

        @Override
        protected Object doInBackground(Object[] params) {

            ..........

            return null;
        }

        @Override
        protected void onPostExecute(Object o) {
            super.onPostExecute(o);

            notificationManager.notify(NOTIFICATION_ID, builder.build());
        }
    }

在没有Android按钮的情况下发送通知

2 个答案: