mono for android Listview 里面按钮 view Button click 注册方法 并且传值给其他Activity 主要是context

需求：为Listview的Item里面的按钮Button添加一个事件，单击按钮时通过事件传值并跳转到新的页面。

环境：mono

效果：

 

 

 

 

 布局代码

   主布局

 

 1 <?xml version="1.0" encoding="utf-8"?>

 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 3     android:orientation="vertical"

 4     android:layout_width="fill_parent"

 5     android:layout_height="fill_parent">

 6     <ListView

 7         android:id="@+id/myList"

 8         android:layout_width="fill_parent"

 9         android:layout_height="fill_parent" />

10 </LinearLayout>

MainLayout

 

Item布局

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:padding="10dp"

              >



  <TextView

    android:id="@+id/txt"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    />



  <Button

    android:id="@+id/btn"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:layout_alignParentRight="true"

    />

</RelativeLayout>

ListviewItemlayout

 

 

 MainActivity

 

 1 using System;

 2 

 3 using Android.App;

 4 using Android.Content;

 5 using Android.Runtime;

 6 using Android.Views;

 7 using Android.Widget;

 8 using Android.OS;

 9 using System.Collections.Generic;

10 

11 namespace ListViewItemBtnClick

12 {

13     [Activity(Label = "ListViewItemBtnClick", MainLauncher = true, Icon = "@drawable/icon")]

14     public class Activity1 : Activity

15     {

16         ListView listView;

17 

18         protected override void OnCreate(Bundle bundle)

19         {

20             base.OnCreate(bundle);

21 

22             SetContentView(Resource.Layout.Main);

23 

24 

25             listView = FindViewById<ListView>(Resource.Id.myList);

26 

27          

28             //填充Listview

29             getList(listView);

30 

31 

32 

33         }

34         

35         //获取Listview

36         private void getList(ListView listview)

37         {

38 

39             Adapter goodsAdapter = new Adapter(this);

40             List<Item> itemList = new List<Item>();

41             Item item = new Item();

42 

43             //给Item赋值 并且添加到list里面

44             for (int i = 0; i <10; i++)

45             {

46                 item.title = i + "|标题|";

47                 item.button = i + "btn";

48                 itemList.Add(item);

49             }

50             //给adapter中添加list的值

51             foreach (Item item1 in itemList)

52             {

53                 goodsAdapter.Add(item1);

54             }

55             //将adapter的值付给listview

56             listview.Adapter = goodsAdapter;

57         }

58 

59     }

60 }

MainActivity

 

Item类

    class Item

    {

        //标题 textview

        public string title { get; set; }

        //按钮

        public string button { get; set; }

    }

Item

 

Adapter配置数据

 1 namespace ListViewItemBtnClick

 2 {

 3     class Adapter:ArrayAdapter<Item>,View.IOnClickListener

 4     {

 5 

 6         private Context context;

 7 

 8         public Adapter(Context context):base(context,0){

 9             //通过构造函数获取context

10             this.context = context;

11         

12         }

13          

14 

15 

16 

17 

18         public override View GetView(int position, View convertView, ViewGroup parent)

19         {

20             View view;

21             //如果convertView不为空则直接使用

22             if (convertView!=null)

23             {

24                 view = convertView;

25 

26             }

27 

28             else

29             {

30                 view = LayoutInflater.From(this.Context).Inflate(Resource.Layout.ListItem, null);

31 

32             }

33 

34             //设置title的值

35             TextView title = view.FindViewById<TextView>(Resource.Id.txt);

36             Button btn = view.FindViewById<Button>(Resource.Id.btn);

37 

38             Item item = GetItem(position);

39 

40             title.Text = item.title + position;

41             //给每个按钮添加一个tag tag的值为position 或者自定义的ID

42             btn.SetTag(Resource.Id.btn,position);

43             btn.Text ="--"+ position+"---";

44             //注册事件

45             btn.SetOnClickListener(this);

46             return view;

47         }

48 

49         

50 

51         public void OnClick(View v)

52         {

53             //获得点击的按钮

54             Button btn = v as Button;

55             //获得tag

56             int id =  Convert.ToInt32(btn.GetTag(btn.Id));

57 

58             Intent it = new Android.Content.Intent();

59 

60             it.SetClass(context,typeof(Activity2));

61             it.PutExtra("pos", id);

62             //注意！启动新Activity

63             context.StartActivity(it);

64         }

65     }

66 }

Adapter

在其他地方显示数据

1  string PosValue = Intent.GetStringExtra("pos");

2             

3 

4             Toast.MakeText(this, PosValue.ToString(), ToastLength.Long).Show();

View Code

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