Get Fragment by Id in Activity

Question

I have the following layout:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <fragment
        class="com.xamarin.recipes.filepicker.FileListFragment"
        android:id="@+id/FileListFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</FrameLayout>

After that I am trying to get access to FileListFragment in Activity:

var fileListFragment = SupportFragmentManager.FindFragmentById(Resource.Id.FileListFragment);

but I get "Unknown identifier: fileListFragment" in Watches for fileListFragment

Update.

Activity code:

using Android.Support.V4.App;
using Android.OS;

namespace com.xamarin.recipes.filepicker
{
    [Android.App.Activity(Label = "Choose file", MainLauncher = true, Icon = "@drawable/icon")]
    public class FilePickerActivity : FragmentActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView(Resource.Layout.ChooseAudio);

            var fileListFragment = (FileListFragment)SupportFragmentManager.FindFragmentById(Resource.Id.FileListFragment);
        }
    }
}

Answer 1

Use This:

 getSupportFragmentManager()
                        .findFragmentById(R.id.FileListFragment))