Xamarin 编程之打电话

参考：http://www.cnblogs.com/yaozhenfa/

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"
     android:minWidth="25px"
     android:minHeight="25px">
     <TextView
         android:text="{0} Calling"
         android:textAppearance="?android:attr/textAppearanceLarge"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/lblNote"
         android:textAlignment="center" />
     <EditText
         android:inputType="phone"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/txtPhoneNumber" />
     <Button
         android:text="Call"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/btnCall" />
 </LinearLayout>

Strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="Thinks">http://www.cnblogs.com/yaozhenfa/p/xamarin_android_quickstart.html</string>
  <string name="Project">CallPhone</string>
  <string name ="Title">Calling</string>
  <string name="Messages">Call {0} ?</string>
  <string name="Warnning_Title">Information</string>
  <string name="Warnning_Value">Couldn`t be Empty!</string>
  <string name="Warnning_IllegalValue">Illegal CallPhone Number!</string>
</resources>

MainActivity.cs

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace PhoneCall
{
    [Activity(Label = "PhoneCall", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        private string _note;
        private EditText txtPhoneNumber;
        private TextView lblNote;
        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
            ///根据ID找手机号输入框按钮
            txtPhoneNumber = FindViewById(Resource.Id.txtPhoneNumber) as EditText;
            lblNote = FindViewById<TextView>(Resource.Id.lblNote);
            txtPhoneNumber.SetTextColor(Android.Graphics.Color.LightGreen);
            txtPhoneNumber.AfterTextChanged += txtPhoneNumber_AfterTextChanged;
            _note = lblNote.Text;
            txtPhoneNumber_AfterTextChanged(txtPhoneNumber, null);
            ///根据ID找Call按钮
            Button btnCall = FindViewById<Button>(Resource.Id.btnCall);
            ///为btnCall注册点击事件(Lambda)
            btnCall.Click += (sender, e) =>
            {
                ///设置MessageBox
                AlertDialog _ad = new AlertDialog.Builder(this).Create();
                ///Check
                if (string.IsNullOrWhiteSpace(txtPhoneNumber.Text))
                {
                    _ad.SetTitle(Resource.String.Warnning_Title);
                    _ad.SetMessage(GetString(Resource.String.Warnning_Value));
                    _ad.SetButton("Ok", delegate { });
                    _ad.Show();
                    return;
                }
                ///Confirm
                if (!Phone.Check(txtPhoneNumber.Text))
                {
                    txtPhoneNumber.Text = "";
                    _ad.SetTitle(Resource.String.Warnning_Title);
                    _ad.SetMessage(GetString(Resource.String.Warnning_IllegalValue));
                    _ad.SetButton("Ok", delegate { });
                    _ad.Show();
                    return;
                }
                _ad.SetTitle(Resource.String.Title);
                _ad.SetMessage(string.Format(GetString(Resource.String.Messages), txtPhoneNumber.Text));
                _ad.SetButton("Ok", new EventHandler<DialogClickEventArgs>(Call));
                _ad.SetButton2("Cancel", delegate { });
                _ad.Show();
            };

        }
        private void Call(object sender, DialogClickEventArgs e)
        {
            StartActivity(Phone.Call(txtPhoneNumber.Text));
        }

        void txtPhoneNumber_AfterTextChanged(object sender, Android.Text.AfterTextChangedEventArgs e)
        {
            lblNote.Text = string.Format(_note, (sender as EditText).Text);
        }
    }
}

Phone.cs

 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;

 using System.Text.RegularExpressions;

 namespace PhoneCall
 {
     public class Phone
     {
         public Phone()
         {

         }

         /// <summary>
         /// 验证
         /// </summary>
         /// <param name="number"></param>
         /// <returns></returns>
         public static bool Check(string number)
         {
             if (Regex.IsMatch(number, @"1[3|5|7|8|][0-9]{9}"))
                 return true;
             return false;
         }

         /// <summary>
         /// 电话呼叫
         /// </summary>
         /// <param name="number"></param>
         /// <returns></returns>
         public static Intent Call(string number)
         {
             Intent _it = new Intent(Intent.ActionCall);
             _it.SetData(Android.Net.Uri.Parse("tel:"+number));
             return _it;
         }
     }
 }

问题：

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="PhoneCall.PhoneCall" android:versionCode="" android:versionName="1.0" android:installLocation="auto">
    <uses-sdk />
    <application android:label="PhoneCall" android:icon="@drawable/Icon"></application>
    <uses-permission android:name="android.permission.CALL_PHONE" />
</manifest>

效果