Xamarin.Android之转换，呼叫，查看历史纪录

Xamarin.Android之转换，呼叫，查看历史纪录

E文文章。

功能：能将输入的字母转换成相应的数字。并且能呼叫出去。能查看呼叫的历史纪录。

界面代码如下：

 <?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="fill_parent"

      android:layout_height="wrap_content"

        android:text="0712-XAMARIN"

           android:id="@+id/et"

     />

   <Button

              android:layout_width="fill_parent"

      android:layout_height="wrap_content"

        android:text="转换"

           android:id="@+id/btnTran"

     />

   <Button

            android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="呼叫"

           android:id="@+id/btnCall"

     />

   <Button

             android:layout_width="fill_parent"

         android:layout_height="wrap_content"

         android:text="历史纪录"

            android:id="@+id/btnCallHistory"

     />

 </LinearLayout>

主Activity代码。

 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 App3

 {

     [Activity(Label = "CallActivity", MainLauncher = true, Icon = "@drawable/icon2")]

     public class CallActivity : Activity

     {

         //定义手机集合。

         private static readonly List<string> PhoneNumbers = new List<string>();

         protected override void OnCreate(Bundle bundle)

         {

             base.OnCreate(bundle);

             SetContentView(Resource.Layout.Call);

             EditText et = FindViewById<EditText>(Resource.Id.et);

             Button btnTran = FindViewById<Button>(Resource.Id.btnTran);

             Button btnCall = FindViewById<Button>(Resource.Id.btnCall);

             btnCall.Enabled = false;

             Button btnCallHistory = FindViewById<Button>(Resource.Id.btnCallHistory);

             btnCallHistory.Enabled = false;

             string translatedNumber = string.Empty;

             btnTran.Click += (sender, e) =>

             {

                 translatedNumber = PhoneTranslator.ToNumber(et.Text);

                 //将转换的手机号加入到手机集合中。

                 PhoneNumbers.Add(translatedNumber);

                 btnCallHistory.Enabled = true;

                 if (String.IsNullOrWhiteSpace(translatedNumber))

                 {

                     btnCall.Text = "呼叫";

                     btnCall.Enabled = false;

                 }

                 else

                 {

                     btnCall.Text = "呼叫" + translatedNumber;

                     btnCall.Enabled = true;

                 }

             };

             btnCall.Click += (sender, e) =>

             {

                 //对话框

                 var callDialog = new AlertDialog.Builder(this);

                 callDialog.SetMessage("呼叫" + translatedNumber + "?");

                 //拨打按钮

                 callDialog.SetNeutralButton("呼叫", 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.注意写法

                     callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));

                     StartActivity(callIntent);

                 });

                 callDialog.SetNegativeButton("取消", delegate { });

                 callDialog.Show();

             };

             btnCallHistory.Click += (sender, e) =>

             {

                 //用意图打开历史纪录的活动

                 Android.Content.Intent it = new Intent(this, typeof(CallHistoryActiviry));

                 it.PutStringArrayListExtra("phoneNumbers", PhoneNumbers);

                 StartActivity(it);

             };

         }

     }

 }

通话纪录的Activity代码。

 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 App3

 {

     [Activity(Label = "CallHistoryActiviry")]

     public class CallHistoryActiviry : ListActivity

     {

         protected override void OnCreate(Bundle bundle)

         {

             base.OnCreate(bundle);

             var phoneNumbers = Intent.Extras.GetStringArrayList("phoneNumbers") ?? new string[];

             //只有当此Activity继承于ListActivity时，整个视图才是列表，才可以这么写。

             this.ListAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleExpandableListItem1, phoneNumbers);

         }

     }

 }