XamarinAndroid组件教程RecylerView动画组件使用动画(3)

（8）打开Main.axml文件，构建主界面。代码如下：

　　

（9）打开MainActivity.cs文件，设置RecylerView子元素添加和删除时的动画效果。代码如下：

using Android.App;using Android.Widget;using Android.OS;using Android.Support.V7.Widget;using System.Linq;using RecyclerViewAnimators.Animators;using Android.Support.V7.App;namespace RecylerViewAnimatorsItemAnimator{    [Activity(Label = "RecylerViewAnimatorsItemAnimator", MainLauncher = true, Icon = "@mipmap/icon", Theme = "@style/AppTheme")]    public class MainActivity : AppCompatActivity    {        static readonly string[] data = {            "Apple", "Ball", "Camera", "Day", "Egg", "Foo", "Google", "Hello", "Iron", "Japan", "Coke",            "Dog", "Cat", "Yahoo", "Sony", "Canon", "Fujitsu", "USA", "Nexus", "LINE", "Haskell", "C++",            "Java", "Go", "Swift", "Objective-c", "Ruby", "PHP", "Bash", "ksh", "C", "Groovy", "Kotlin",            "Chip", "Japan", "U.S.A", "San Francisco", "Paris", "Tokyo", "Silicon Valley", "London",            "Spain", "China", "Taiwan", "Asia", "New York", "France", "Kyoto", "Android", "Google", "C#",            "iPhone", "iPad", "iPod", "Wasabeef", "Xamarin", "South Africa", "Cape Town", "Microsoft"        };        protected override void OnCreate(Bundle savedInstanceState)        {            base.OnCreate(savedInstanceState);            SetContentView(Resource.Layout.Main);            var toolbar = FindViewById
     
      (Resource.Id.tool_bar);            SetSupportActionBar(toolbar);            SupportActionBar.SetDisplayShowTitleEnabled(false);            var recyclerView = FindViewById
      
       (Resource.Id.list);            recyclerView.SetLayoutManager(new LinearLayoutManager(this));              //设置布局管理            var datalist = data.ToList
       
        ();            var adapter = new DataAdapter(this, datalist);            recyclerView.SetAdapter(adapter);                                                                        //设置适配器            recyclerView.SetItemAnimator(new FlipInLeftYAnimator());                        //设置动画效果            //添加子元素            FindViewById(Resource.Id.add).Click += (sender, e) => {                adapter.Add("newly added item", 1);            };            //删除子元素            FindViewById(Resource.Id.del).Click += (sender, e) => {                adapter.Remove(1);            };        }    }}
       
      
     

　　

运行程序后，初始状态如图1.1所示。轻拍Add按钮，实现子元素的添加，在添加子元素的时候会伴有指定动画效果，如图1.2所示。轻拍DEL按钮，实现子元素的删除，在子元素删除的过程中也会伴有指定的动画效果。

 

图1.1  初始状态                          图1.2  添加数据