如何在用户按某个按钮时创建通知？

Question

我知道如何显示通知，但是当我将它放在“onOptionsItemSelected”菜单上时，它不会创建通知。我很可能会遗漏一些东西，我只是不知道那是什么。继承人代码：

@TargetApi(android.os.Build.VERSION_CODES.KITKAT)
public void notification() {
    etTitle = (EditText) findViewById(R.id.etTitle);
    etNote = (EditText) findViewById(R.id.etNote);

    String Title = etTitle.toString();
    String Note = etNote.toString();

    //boolean success = true;


    notification = new NotificationCompat.Builder(this)
            .setStyle(new NotificationCompat.BigTextStyle())
            .setContentTitle(Title)
            .setContentText(Note)
            .setDefaults(Notification.DEFAULT_ALL);


    //vibrates when notification comes up
    Notification note = notification.build();
    note.defaults |= Notification.DEFAULT_VIBRATE;

    note.flags |= Notification.FLAG_NO_CLEAR;

    note.extras.getBoolean(Notification.EXTRA_SHOW_WHEN);

    Intent resultIntent = new Intent();


    resultIntent.putExtra(CommonConstants.EXTRA_MESSAGE, "hi");
    resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

     PendingIntent resultPendingIntent = PendingIntent.getActivity(getApplicationContext(),0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    notification.setContentIntent(resultPendingIntent);

    manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    manager.notify(0, notification.build());


}

^这就是我创建通知的方法

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.

    switch(item.getItemId()) {
        case R.id.action_settings:
            return true;
        case R.id.action_save:      
            actionSave();
            return true;
        case R.id.action_delete:
            actionDelete();
            return true;
        case R.id.Alarm:

            return true;
        case R.id.Pin:
            notification();
            return true;
    }

    return super.onOptionsItemSelected(item);
}

^那是我的onOptionsItemSelected菜单，R.id.Pin是创建通知的按钮。

任何建议都会有很大的帮助。谢谢。 注意：我只是java的入门级程序员，所以我可能不知道我想要学习的所有代码。