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[0];
            //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);
        }
    }
}