1>JAVAC : warning : unknown enum constant Scope.LIBRARY_GROUP in xamarin.android after adding xamari.support.v4 and xamarin.support.v7.AppC

问题

while practicing splash Screen I add xamarin.support.v4 package and xamarin.android.v7.appcompat every thin is fine I am just getting warning 1>JAVAC : warning : unknown enum constant Scope.LIBRARY_GROUP and my code is working well: my code of splash activity is:

enter code here
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;
using Android.Support.V7.App;
using System.Threading.Tasks;
using Android.Util;
namespace againCardview
{
[Activity(Label = "SplashActivity",MainLauncher =true,NoHistory                   =true,Theme = "@style/MyTheme.Splash")]
public class SplashActivity :AppCompatActivity
{
    string tag = "TAg" + typeof(SplashActivity).Name;
    public override void OnCreate(Bundle      savedInstanceState,PersistableBundle persist)
    {
        base.OnCreate(savedInstanceState,persist);
        Log.Debug(tag, "this is Oncreate method of splashActivity");
    }
    protected override void OnResume()
    {
        base.OnResume();
        var setartActivity = new Task(()=> {
            Log.Debug(tag, "Now App is starting");
            Task.Delay(50000);
            Log.Debug(tag, "now performing importing work");
        });
        setartActivity.ContinueWith(p => {
            Log.Debug(tag, "Starting App");
            StartActivity(new Intent(Application.Context,      typeof(MainActivity)));
        },TaskScheduler.FromCurrentSynchronizationContext());

    }
}

}

回答1:

For now I solved this by rolling back to the previous version of Google Play Services in my app/build.gradle dependencies. This problem happened to me after updating to the latest libraries, but goes away with this:

dependencies {
    // there is a problem using 25.2.0: Warning:unknown enum constant Scope.LIBRARY_GROUP
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.android.support:design:24.2.1'
    compile 'com.android.support:support-v4:24.2.1'
    compile 'com.android.support:cardview-v7:24.2.1'
    compile 'com.android.support:recyclerview-v7:24.2.1'
    compile 'com.android.support:support-vector-drawable:24.2.1'
    compile 'com.android.support:support-annotations:24.2.1'
}

回答2:

to fix it download xamarin.Android.Support.V7.AppCompat 24.2.1 .

来源：https://stackoverflow.com/questions/42511741/1javac-warning-unknown-enum-constant-scope-library-group-in-xamarin-android

标签

xamarin.android