'MyFirstApp.Resource.Id'不包含'myButton'的定义(CS0117)(MyFirstApp)

Question

主要活动我正在命名我的项目"MyFirstApp"

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

namespace MyFirstApp
{
    [Activity (Label = "MyFirstApp", MainLauncher = true)]
    public class MainActivity : Activity
    {
        int count = 1;

        protected override void OnCreate (Bundle bundle)
        {
            base.OnCreate (bundle);

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

            // Get our button from the layout resource,
            // and attach an event to it
            Button button = FindViewById<Button> (Resource.Id.myButton);

            button.Click += delegate {
                button.Text = string.Format ("{0} clicks!", count++);
            };
        }
    }
}

布局 res /布局

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">
    <EditText
        android:id="@+id/edit_message"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="Enter Message" />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Send"
        android:id="@+id/button_send" />
</LinearLayout>

字符串

    <?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">My First App</string>
    <string name="edit_message">Enter a message</string>
    <string name="button_send">Send</string>
    <string name="action_settings">Settings</string>
    <string name="title_activity_main">MainActivity</string>
</resources>

请帮助我,我是android开发的初学者, 如果有什么不清楚的话,我会尝试添加更多细节,我正在使用Xamarin进行开发

谢谢

Answer 1

添加属性:

android:id="@+id/myButton"

到布局xml文件中的按钮.

然后在您的活动中,您可以找到如下按钮:

Button button = (Button) findViewById(R.id.myButton);

代替:

Button button = FindViewById<Button> (Resource.Id.myButton);

更新:嗯,我提到的findViewById是普通的Android,不确定它在Xamarin中是如何工作的,但是肯定你的按钮在xml中需要一个id

更新2:实际上你已经拥有了Id和你的按钮ID,但它不是myButton,它是button_send==>所以你可能想要使用那个而不是myButton