发布：2015/5/25 8:43:22作者：管理员 来源：本站 浏览次数：1121
开始研究Android平台软件编程，Xamarin Mono for Android上手快，跨平台共享代码，代价是bug多多，是一味可口的毒药啊！
环境VS2012 + Xamarin Mono Android 4.10.01073
先实现个小功能热热身，建立一个新Android Application工程，修改Activity1.cs代码如下：
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using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
namespace MyXamarinApp
{
[Activity(Label = "MyXamarinApp", MainLauncher = true, Icon = "@drawable/icon")]
public class Activity1 : Activity
{
int count = 1;
DateTime? lastBackKeyDownTime;
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++); };
}
public override bool OnKeyDown(Keycode keyCode, KeyEvent e)
{
if (keyCode == Keycode.Back && e.Action == KeyEventActions.Down)
{
if (!lastBackKeyDownTime.HasValue || DateTime.Now - lastBackKeyDownTime.Value > new TimeSpan(0, 0, 2))
{
Toast.MakeText(this.ApplicationContext, "再按一次退出程序", ToastLength.Short).Show();
lastBackKeyDownTime = DateTime.Now;
}
else
{
Finish();
}
return true;
}
return base.OnKeyDown(keyCode, e);
}
}
}
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功能很简单，就不解释了。请参照：http://www.cnblogs.com/weizilong/archive/2013/08/15/3259452.html
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