Xamarin Custom View ClassNotFoundException

问题

I'm new to the Xamarin. I'm trying to create my own view in an Android aplication, but it's throwing an ClassNotFoundException on constructor. I was searching for similar issues but I haven't found similar one (only here is something that I think may be quite similar, but it isn't solved in fact — answers tell to edit java file, but it's not possible when working in Xamarin). Here's my code of MainActivity.cs:

using Android.App;
using Android.OS;

namespace App5
{
    [Activity(Label = "App5", MainLauncher = true)]
    public class MainActivity : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            View1 view = new View1(this);
            SetContentView(view);
            //SetContentView(Resource.Layout.Main);
         }
    }
}

and View1.cs:

using Android.Content;
using Android.Views;

namespace App5
{
    public class View1 : View
    {
        public View1(Context context)
           : base(context)
        {
        }
    }
}

and this is description of the exception:

Java.Lang.ClassNotFoundException: Didn't find class "md593b8d625023f6802361dd1b8a6546be5.View1" on path: DexPathList[[zip file "/data/app/App5.App5-1/base.apk"],nativeLibraryDirectories=[/data/app/App5.App5-1/lib/arm64, /system/fake-libs64, /data/app/App5.App5-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]

It's very strange that when I comment the inheriting from View and inheriting the constructor, and of course SetContentView to a layout in the resource, system “can find this class” and the app doesn't crash.

I'm using VisualStudio 2015 and have the latest stable version of Xamarin installed.

回答1:

Try to delete bin and obj and rebuild project. This start happend to me after last visual studio update. Another think is kill msbuilld proceses too.

来源：https://stackoverflow.com/questions/47812966/xamarin-custom-view-classnotfoundexception

标签

android

Xamarin

view

classnotfound