如何在选择的特定项目下方显示列表？

Question

我正在动态列表视图显示下面选择的特定项目。任何人都建议我怎么可能？我在这里证明了快照。

我的代码如下。

 root.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
               // im++;

                final ListPopupWindow listPopupWindow = new ListPopupWindow(getActivity());
                ArrayList<String> a=new ArrayList<String>();
                a.add("a");
                a.add("b");
                listPopupWindow.setAdapter(new ArrayAdapter(
                        getActivity(),
                        R.layout.raw_comment,a.size()));
                listPopupWindow.setAnchorView(v);
                listPopupWindow.show();
                //showAlertDialog(getActivity(), "List display 1");
            }
        });

您的回答将不胜感激

Answer 1

试试这个

import UIKit

import NotificationCenter

class TodayViewController: UIViewController, NCWidgetProviding {


    @IBOutlet var TextToWidget: UILabel!


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view from its nib.

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func widgetPerformUpdateWithCompletionHandler(completionHandler: ((NCUpdateResult) -> Void)) {


        let ShareDefaults = NSUserDefaults(suiteName:"group.St33v3n.TextOnWidget")

        self.TextToWidget.text = ShareDefaults?.objectForKey("StringKey") as? String

        completionHandler(NCUpdateResult.NewData)
    }

}

Answer 2

例如：

findViewById(R.id.btn).setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

       //use MotionEvent event : getX() and getY() will return your pressing 
         location in the button.
    }
});