MonoForAndroid的按钮单击事件及监听器的实现方式

来源：互联网发布：苹果mac解压rar 编辑：程序博客网时间：2024/05/16 04:44

方法一：:MonoForAndroid默认的C#语法特点

Main.axml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent">    <Button        android:id="@+id/MyButton"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/Hello" /></LinearLayout>

MainActivity.cs

using System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;namespace AndroidApplication39{    [Activity(Label = "AndroidApplication39", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        int count = 1;        protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);            // Get our button from the layout resource,            // and attach an event to it            Button button = FindViewById<Button>(Resource.Id.MyButton);            button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };                   }    }}

方法二：

外部类作为监听器

获取控件的方式为

Button button = FindViewById<Button>(Resource.Id.MyButton);

Main.axml同方法一

MainActivity.cs

using System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;using Android.Util;namespace AndroidApplication39{    [Activity(Label = "AndroidApplication39", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        private TextView mTextView01;        protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);            // Get our button from the layout resource,            // and attach an event to it            Button button = FindViewById<Button>(Resource.Id.MyButton);            button.SetOnClickListener(new ClickListener());        }    }    public class ClickListener : Java.Lang.Object, View.IOnClickListener    {        int count = 1;        public void OnClick(View v)        {            Button button = v.FindViewById<Button>(Resource.Id.MyButton);            button.Text = string.Format("{0} clicks!", count++);        }    }}

方法三：

外部类作为监听器

获取控件方式为

Button button = (Button)FindViewById(Resource.Id.MyButton);

using System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;using Android.Util;namespace AndroidApplication39{    [Activity(Label = "AndroidApplication39", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        private TextView mTextView01;        protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            SetContentView(Resource.Layout.Main);            // Get our button from the layout resource,            // and attach an event to it            Button button = (Button)FindViewById(Resource.Id.MyButton);            button.SetOnClickListener(new ClickListener());        }    }    public class ClickListener : Java.Lang.Object, View.IOnClickListener    {        int count = 1;        public void OnClick(View v)        {            Button button = (Button)v.FindViewById(Resource.Id.MyButton);            button.Text = string.Format("{0} clicks!", count++);        }    }}

方法4:

内部类作为监听器

using System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;using Android.Util;namespace AndroidApplication39{    [Activity(Label = "AndroidApplication39", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);            // Get our button from the layout resource,            // and attach an event to it            Button button = (Button)FindViewById(Resource.Id.MyButton);            ClickListener listener = new ClickListener();            button.SetOnClickListener(listener);        }        class ClickListener : Java.Lang.Object, View.IOnClickListener        {            int count = 1;            public void OnClick(View v)            {                Button button = (Button)v.FindViewById(Resource.Id.MyButton);                button.Text = string.Format("{0} clicks!", count++);            }        }    }}

方法5:

直接绑定到标签
Android还有一种更简单的绑定事件监听器的的方式，直接在界面布局文件中为指定标签绑定事件处理方法。
对于很多Android标签而言，它们都支持如onClick、onLongClick等属性，这种属性的属性值就是一个形如xxx

Main.axml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent">    <Button        android:id="@+id/MyButton"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/Hello"        android:onClick="clickHandler" /></LinearLayout>

MainActivity.cs

using System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;using Android.Util;namespace AndroidApplication39{    [Activity(Label = "AndroidApplication39", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        int count = 1;        protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);        }        public void clickHandler(View v)        {            Button button = (Button)v.FindViewById(Resource.Id.MyButton);            button.Text = string.Format("{0} clicks!", count++);        }    }   }

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