android - 如何在应用程序未运行时显示通知

Question

我是 android 的初学者。我创建了一个服务来在调用 mainActivity 上的 onCreat 时显示通知

    public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent a = new Intent(this,myService.class);
        startService(a);
    }

}

这是我的服务等级

public class myService extends Service{
  private NotificationManager mManager;

 @Override
    public void onCreate() {

     mManager = (NotificationManager) this.getApplicationContext().getSystemService(this.getApplicationContext().NOTIFICATION_SERVICE);
       Intent intent1 = new Intent(this.getApplicationContext(),MainActivity.class);

       Notification notification = new Notification(R.drawable.ic_launcher,"This is a test message!", System.currentTimeMillis());
       intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP| Intent.FLAG_ACTIVITY_CLEAR_TOP);

       PendingIntent pendingNotificationIntent = PendingIntent.getActivity( this.getApplicationContext(),0, intent1,PendingIntent.FLAG_UPDATE_CURRENT);
       notification.flags |= Notification.FLAG_AUTO_CANCEL;
       notification.setLatestEventInfo(this.getApplicationContext(), "AlarmManagerDemo", "This is a test message!", pendingNotificationIntent);

       mManager.notify(0, notification);
 }

但我想如果我的应用程序没有运行，我可以显示此服务，例如，如果我的电话时间大于 9，我一天只显示一次此通知。有什么想法吗？提前致谢

Answer 1

通知在后台运行，不需要运行应用程序。当应用程序未运行时，通知也起作用，这是它们的主要任务。我向您推荐 Vogella 的教程和文档:

http://www.vogella.com/tutorials/AndroidNotifications/article.html

http://developer.android.com/guide/topics/ui/notifiers/notifications.html