Question

using Android.App;
using Android.Widget;
using Android.OS;
using Android.Media;

namespace Moosic
{
    [Activity(Label = "Moosic", MainLauncher = true, Icon = "@drawable/icon1.png")]

    public class MainActivity : Activity

    {
        MediaPlayer player;


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

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

            player = MediaPlayer.Create(this, Resource.Raw.again);

            Button button1 = FindViewById<Button>(Resource.Id.playButton);
            button1.Click += (sender, e) =>
            {
                player.Start();
            };
        }
    }
}

错误CS0117＆＃39; Resource.Id＆＃39;不包含＆＃39; playButton＆＃39;的定义Moosic c：\ users \ Farorex \ source \ repos \ Moosic \ Moosic \ MainActivity.cs 25 Active

创建一个简单的媒体播放器，尝试重建解决方案并清理解决方案，但似乎无法正常工作

Answer 1

你如何设置该按钮的ID？我见过人们犯的常见错误是使用 @id 而不是 @ + id

在您的活动布局中，您应该：

<Button
android:id="@+id/playButton"
...
/>

否则，它将不会在Resource.designer.cs中创建

Xamarin与vs：resource.Id不包含...的定义

1 个答案: