一，HelloWorld
这个阶段主要完成目标：Xamarin价格收费标准考察和分析。Xamarin.Android 部署安装。第一个Xamarin.Android工程HelloWorld，熟悉Android工程新建、运行、打包整个流程。第二个Xamarin.Android工程，一个手机拨号应用；完成对Xamarin.android 开发的基本了解。
阶段结论：Xamarin.android 支持Android基本开发。
注意事项：Xamarin.android 所打包比原生系统所打包 大3.02M
1.1 新建一个solution
1.2 运行工程
1.3 导出应用程序
1.3.1 选择工程
选中HelloWorld工程，在Tabbar栏，project–>Publish Android Application
1.3.2 填写签名证书
1.3.3 选择存放位置以及文件名，点击Create生成一个安装包
1.4 代码结构介绍
1.5 Xamarin Studio 介绍
二，手机拨号应用
2.1 整体界面效果
2.2 应用实现以及涉及知识点：
2.2.1 axml 界面布局使用
与Android 在eclipse中开发类似：允许使用界面布局选择器Toolbox将布局控件拖拽到页面上。也允许在Source中进行代码实现。
2.2.2 组件获取
Button mBtnCall = FindViewById<Button> (Resource.Id.CallButton); |
2.2.3 添加事件
mBtnCall.Click += (object sender, EventArgs e) =>{}; |
2.2.4 对话框
var callDialog = new AlertDialog.Builder(this);
callDialog.SetMessage("Call " + translatedNumber + "?");
callDialog.SetNeutralButton("Call", delegate {
// do other thing
});
callDialog.SetNegativeButton("Cancel", delegate { });
// Show the alert dialog to the user and wait for response.
callDialog.Show(); |
2.2.5 页面跳转
var intent = new Intent(this, typeof(CallHistoryActivity));
intent.PutStringArrayListExtra("phone_numbers", phoneNumbers);
StartActivity(intent); |
2.2.6 打印输出
Console.WriteLine ("Test Output Str"); |
2.2.7 新建类
右键工程，选择Add 可以新建以下类文件
三，附上主要代码类：
using System.Text;
using System;
namespace PhoneCallDemo
{
public static class PhonewordTranslator
{
public static string ToNumber(string raw)
{
if (string.IsNullOrWhiteSpace(raw))
return "";
else
raw = raw.ToUpperInvariant();
var newNumber = new StringBuilder();
foreach (var c in raw)
{
if (" -0123456789".Contains(c))
newNumber.Append(c);
else {
var result = TranslateToNumber(c);
if (result != null)
newNumber.Append(result);
}
// otherwise we've skipped a non-numeric char
}
return newNumber.ToString();
}
static bool Contains (this string keyString, char c)
{
return keyString.IndexOf(c) >= 0;
}
static int? TranslateToNumber(char c)
{
if ("ABC".Contains(c))
return 2;
else if ("DEF".Contains(c))
return 3;
else if ("GHI".Contains(c))
return 4;
else if ("JKL".Contains(c))
return 5;
else if ("MNO".Contains(c))
return 6;
else if ("PQRS".Contains(c))
return 7;
else if ("TUV".Contains(c))
return 8;
else if ("WXYZ".Contains(c))
return 9;
return null;
}
}
} |
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.Collections.Generic;
namespace PhoneCallDemo
{
[Activity (Label = "PhoneCall", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
static readonly List<string> phoneNumbers = new List<string>();
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
EditText mEditPhoneNum = FindViewById<EditText> (Resource.Id.PhoneNumberText);
Button mBtnCall = FindViewById<Button> (Resource.Id.CallButton);
Button mBtnTrans = FindViewById<Button> (Resource.Id.TranslateButton);
Button mBtnCallHistory = FindViewById<Button> (Resource.Id.callhistoryButton);
mBtnCall.Enabled = false;
mBtnCallHistory.Enabled = false;
string translatedNumber = string.Empty;
mBtnTrans.Click += (object sender, EventArgs e) => {
translatedNumber = PhoneCallDemo.PhonewordTranslator.ToNumber(mEditPhoneNum.Text);
if (String.IsNullOrWhiteSpace(translatedNumber))
{
mBtnCall.Text="Call";
mBtnCall.Enabled = false;
}else
{
mBtnCall.Text = "Call " + translatedNumber;
mBtnCall.Enabled = true;
}
};
mBtnCall.Click += (object sender, EventArgs e) => {
var callDialog = new AlertDialog.Builder(this);
callDialog.SetMessage("Call " + translatedNumber + "?");
callDialog.SetNeutralButton("Call", delegate {
phoneNumbers.Add(translatedNumber);
mBtnCallHistory.Enabled = true;
// Create intent to dial phone
var callIntent = new Intent(Intent.ActionCall);
callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));
StartActivity(callIntent);
});
callDialog.SetNegativeButton("Cancel", delegate { });
// Show the alert dialog to the user and wait for response.
callDialog.Show();
};
mBtnCallHistory.Click += (sender, e) =>
{
var intent = new Intent(this, typeof(CallHistoryActivity));
intent.PutStringArrayListExtra("phone_numbers", phoneNumbers);
StartActivity(intent);
};
}
}
}
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace PhoneCallDemo
{
[Activity (Label = "CallHistoryActivity")]
public class CallHistoryActivity : ListActivity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
// Create your application here
var phoneNumbers = Intent.Extras.GetStringArrayList("phone_numbers") ?? new string[0];
this.ListAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, phoneNumbers);
}
}
} |
<?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">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/PhoneNumberText"
android:hint="TEL:123456" />
<Button
android:id="@+id/TranslateButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/text_translate" />
<Button
android:text="Call"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/CallButton" />
<Button
android:text="@string/CallHistory"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/callhistoryButton" />
</LinearLayout> |
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