Xamarin.Android 入门实例（3）之呼叫电话号码

1.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="请输入电话号码："
         android:textAppearance="?android:attr/textAppearanceLarge"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/Tag" />
     <EditText
         android:text="13002929017"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/PhoneNumberText" />
     <Button
         android:text="转化"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/TranslateButton" />
     <Button
         android:text="呼叫"
         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"
         android:enabled="false" />
 </LinearLayout>

2.MainActivity.cs

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

 namespace Phoneword_Droid
 {
     [Activity(Label = "Phoneword_Droid", MainLauncher = true, Icon = "@drawable/icon")]
     public class MainActivity : Activity
     {
         int count = ;
         static readonly List<string> phoneNumbers = new List<string>();

         protected override void OnCreate(Bundle bundle)
         {
             //button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };

             base.OnCreate(bundle);
             SetContentView(Resource.Layout.Main);

             EditText phoneNumberText = FindViewById<EditText>(Resource.Id.PhoneNumberText);
             Button translateButton = FindViewById<Button>(Resource.Id.TranslateButton);
             Button callButton = FindViewById<Button>(Resource.Id.CallButton);
             Button callHistoryButton = FindViewById<Button>(Resource.Id.CallHistoryButton);

             callButton.Enabled = false;

             #region//转化拨号
             string translatedNumber = string.Empty;
             translateButton.Click += (object sender, EventArgs e) =>
             {
                 translatedNumber = PhoneTranslator.ToNumber(phoneNumberText.Text);
                 if (String.IsNullOrWhiteSpace(translatedNumber))
                 {
                     callButton.Text = "Call";
                     callButton.Enabled = false;
                 }
                 else
                 {
                     callButton.Text = "Call" + translatedNumber;
                     callButton.Enabled = true;
                 }
             };
             #endregion

             #region//拨打电话
             callButton.Click += (s, e) =>
             {
                 //对话框
                 var callDialog = new AlertDialog.Builder(this);

                 //对话框内容
                 callDialog.SetMessage("Call" + translatedNumber + "?");

                 //拨打按钮
                 callDialog.SetNeutralButton("Call", delegate
                 {
                     ////使用意图拨打电话
                     //var callIntent = new Intent(Intent.ActionCall);

                     ////将需要拨打的电话设置为意图的参数
                     //callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));

                     //StartActivity(callIntent);

                     //将电话加入到历史记录列表中
                     phoneNumbers.Add(translatedNumber);

                     //如果callHistoryButton的定义在这段代码后面将会出错，所以我们这个时候需要将
                     //Button callHistoryButton = FindViewById<Button>(Resource.Id.CallHistoryButton); 代码提前
                     callHistoryButton.Enabled = true;

                     //使用意图拨打电话
                     var callIntent = new Intent(Intent.ActionCall);

                     //将需要拨打的电话设置为意图的参数
                     callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));

                     StartActivity(callIntent);

                 });

                 //取消按钮
                 callDialog.SetNegativeButton("Cancel", delegate { });

                 //显示对话框
                 callDialog.Show();
             };
             #endregion

             #region//通话记录
             callHistoryButton.Click += (e, t) =>
             {
                 //指定意图需要打开的活动
                 var intent = new Intent(this, typeof(CallHistoryActivity));
                 //设置意图传递的参数
                 intent.PutStringArrayListExtra("phone_numbers", phoneNumbers);
                 StartActivity(intent);
             };
             #endregion

         }
     }
 }

3.PhoneTranslator.cs

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

 namespace Phoneword_Droid
 {
     [Activity(Label = "Phoneword_Droid", MainLauncher = true, Icon = "@drawable/icon")]
     public class MainActivity : Activity
     {
         int count = ;
         static readonly List<string> phoneNumbers = new List<string>();

         protected override void OnCreate(Bundle bundle)
         {
             //button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };

             base.OnCreate(bundle);
             SetContentView(Resource.Layout.Main);

             EditText phoneNumberText = FindViewById<EditText>(Resource.Id.PhoneNumberText);
             Button translateButton = FindViewById<Button>(Resource.Id.TranslateButton);
             Button callButton = FindViewById<Button>(Resource.Id.CallButton);
             Button callHistoryButton = FindViewById<Button>(Resource.Id.CallHistoryButton);

             callButton.Enabled = false;

             #region//转化拨号
             string translatedNumber = string.Empty;
             translateButton.Click += (object sender, EventArgs e) =>
             {
                 translatedNumber = PhoneTranslator.ToNumber(phoneNumberText.Text);
                 if (String.IsNullOrWhiteSpace(translatedNumber))
                 {
                     callButton.Text = "Call";
                     callButton.Enabled = false;
                 }
                 else
                 {
                     callButton.Text = "Call" + translatedNumber;
                     callButton.Enabled = true;
                 }
             };
             #endregion

             #region//拨打电话
             callButton.Click += (s, e) =>
             {
                 //对话框
                 var callDialog = new AlertDialog.Builder(this);

                 //对话框内容
                 callDialog.SetMessage("Call" + translatedNumber + "?");

                 //拨打按钮
                 callDialog.SetNeutralButton("Call", delegate
                 {
                     ////使用意图拨打电话
                     //var callIntent = new Intent(Intent.ActionCall);

                     ////将需要拨打的电话设置为意图的参数
                     //callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));

                     //StartActivity(callIntent);

                     //将电话加入到历史记录列表中
                     phoneNumbers.Add(translatedNumber);

                     //如果callHistoryButton的定义在这段代码后面将会出错，所以我们这个时候需要将
                     //Button callHistoryButton = FindViewById<Button>(Resource.Id.CallHistoryButton); 代码提前
                     callHistoryButton.Enabled = true;

                     //使用意图拨打电话
                     var callIntent = new Intent(Intent.ActionCall);

                     //将需要拨打的电话设置为意图的参数
                     callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));

                     StartActivity(callIntent);

                 });

                 //取消按钮
                 callDialog.SetNegativeButton("Cancel", delegate { });

                 //显示对话框
                 callDialog.Show();
             };
             #endregion

             #region//通话记录
             callHistoryButton.Click += (e, t) =>
             {
                 //指定意图需要打开的活动
                 var intent = new Intent(this, typeof(CallHistoryActivity));
                 //设置意图传递的参数
                 intent.PutStringArrayListExtra("phone_numbers", phoneNumbers);
                 StartActivity(intent);
             };
             #endregion

         }
     }
 }

4.CallHistoryActivity.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;

namespace Phoneword_Droid
{
    [Activity(Label = "@string/callHistory")]
    public class CallHistoryActivity : ListActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            //从意图中获取传递过来的参数
            var phoneNumbers = Intent.Extras.GetStringArrayList("phone_numbers") ?? new string[0];

            //将字符串数组显示到列表控件中（因为继承的是ListActivity所以整个视图就是一个列表）
            this.ListAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, phoneNumbers);

            //关于ArrayAdapter的第二个参数，其实就是指定列表中每个项的视图，后面我们会通过自定义的方式控制列表的项

        }
    }
}

模拟器

运行效果