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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