c# - CS0117 C# 'Resource.Id' 不包含 "PhoneNumberText"的定义

Question

我将 Visual Studio 2015 与 Xamarin 结合使用。我将我的项目命名为“Phoneword”我在 Xamarin 的网站上看到了这段代码，例如教程/示例。

TranslateButton 和 CallButton 成员出现同样的错误。

MainActivity.cs

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

namespace Phoneword
{
[Activity(Label = "Phoneword", MainLauncher = true)]
public class MainActivity : Activity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        // Our code will go here
        // Get our UI controls from the loaded layout:
        EditText phoneNumberText = (EditText)FindViewById(Resource.Id.PhoneNumberText);
        Button translateButton = FindViewById<Button>(Resource.Id.TranslateButton);
        Button callButton = FindViewById<Button>(Resource.Id.CallButton);

        // Disable the "Call" button
        callButton.Enabled = false;

        // Add code to translate number
        string translatedNumber = string.Empty;

        translateButton.Click += (object sender, EventArgs e) =>
        {
            // Translate user's alphanumeric phone number to numeric
            translatedNumber = Core.PhonewordTranslator.ToNumber(phoneNumberText.Text);
            if (String.IsNullOrWhiteSpace(translatedNumber))
            {
                callButton.Text = "Call";
                callButton.Enabled = false;
            }
            else
            {
                callButton.Text = "Call " + translatedNumber;
                callButton.Enabled = true;
            }
        };

        callButton.Click += (object sender, EventArgs e) =>
        {
            // On "Call" button click, try to dial phone number.
            var callDialog = new AlertDialog.Builder(this);
            callDialog.SetMessage("Call " + translatedNumber + "?");
            callDialog.SetNeutralButton("Call", delegate {
                // Create intent to dial phone
                var callIntent = new Intent(Intent.ActionCall);
                callIntent.SetData(Android.Net.Uri.Parse("tel:" + translatedNumber));
                StartActivity(callIntent);
            });
            callDialog.SetNegativeButton("Cancel", delegate { });

            // Show the alert dialog to the user and wait for response.
            callDialog.Show();
        };
    }

}
}

Resource/Layout/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">
    <TextView
        android:text="Enter a Phoneword"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView1" />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/PhoneNumberText"
        android:text="1-855-XAMARIN" />
    <Button
        android:text="Translate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/TranslateButton" />
    <Button
        android:text="Call"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/CallButton" />
</LinearLayout>

我是 Android 开发的初学者，如果您需要其他信息，我会尝试添加更多详细信息。请帮助我

Answer 1

我的问题解决了!从 Tools/Android SDK Manager 我卸载了:

• Android SDK 构建工具 24
• 安卓 N(API 24)

我安装了:

• Android 6.0 (API 23)
• Android SDK 构建工具 23.0.3
• Android SDK 构建工具 23.0.2

关闭 VS 并重新启动它后...在解决方案资源管理器中，我选择了“清理解决方案”，然后选择了“重建解决方案”。