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);
         }
     }
 }