listview popup in Xamarin.android

Question

I have thoroughly searched already and then decided to ask here. I am trying to find an example of implementing a button when a user clicks, listview appears and when user clicks the button again, the listview disappears in xamarin.android

Answer 1

1. 保留一个变量来控制ListView是否可见。
2. 让您的活动实施Android.Views.View.IOnClickListener。

3. 点击按钮可更改ListView的可见性

   private bool _isShowing = false;
   
   //Don't forget to initialize those in your OnCreate 
   private ListView _listView;
   private Button _button;
   
   public void OnClick (View v)
   {
       _isShowing = !_isShowing;
       _listView.Visibility = _isShowing ? ViewStates.Visible : ViewStates.Gone;
   }
   
   //Inside your OnCreate, after initializing you button and your ListView
   _button.SetOnClickListener(this);
   

要使用流畅的动画，只需将其添加到.axml：

android:animateLayoutChanges="true"

我强烈建议使用MVVM方法，但由于你没有提到任何框架，这样就可以了。