Inflating layout inside fragment

Question

I have a problem. I am using a FrameLayout to use fragments. Now in one of my fragments I want to create a dialog with a EditText. So I wrote this code for my fragment.cs:

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    View view = inflater.Inflate(Resource.Layout.intro_add_new_project, container, false);

    ImageButton btnAddProject = view.FindViewById<ImageButton>(Resource.Id.btnAddProject);
    btnAddProject.Click += delegate
    {
        LayoutInflater layoutinflater = LayoutInflater.From(this);
        View DialogView = layoutinflater.Inflate(Resource.Layout.setup_project_name_dialog, null);
        Android.Support.V7.App.AlertDialog.Builder ProjectNameDialog = new Android.Support.V7.App.AlertDialog.Builder(this);
        ProjectNameDialog.SetView(DialogView);

        EditText editProjectName = DialogView.FindViewById<EditText>(Resource.Id.editProjectName);
        ProjectNameDialog.SetCancelable(false);
        ProjectNameDialog.SetPositiveButton("Continue", delegate
        {
            //My own code here
        });
    };


    return view;
}

Now I am having a problem with the 2x this. It gives the following error:

cannot convert from 'Appname.Fragments.Intro_Add_Project' to 'Android.Content.Context'

What am I supposed to fill in instead of this. Don't forget.... It is a fragment!

Can someone help me?

UPDATE

The error I get is:

{Java.Lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at Java.Interop.JniEnvironment+InstanceMethods.CallObjectMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x00069] in <42dc777b518744fdae9988e94489a4a0>:0 at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeVirtualObjectMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x0002a] in <42dc777b518744fdae9988e94489a4a0>:0 at Android.Support.V7.App.AlertDialog+Builder.Show () [0x0000a] in <6bc524e87f8f4e14ab823997c1f60345>:0 at Appname.Fragments.Intro_Add_Project.b__1_0 (System.Object , System.EventArgs ) [0x0005b] in C:\Users\Alexander\source\repos\Appname\Appname\Fragments\Intro_Add_Project.cs:45 --- End of managed Java.Lang.IllegalStateException stack trace --- java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:354) at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:323) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284) at android.support.v7.app.AppCompatDialog.setContentView(AppCompatDialog.java:83) at android.support.v7.app.AlertController.installContent(AlertController.java:226) at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:260) at android.app.Dialog.dispatchOnCreate(Dialog.java:407) at android.app.Dialog.show(Dialog.java:302) at android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:958) at mono.android.view.View_OnClickListenerImplementor.n_onClick(Native Method) at mono.android.view.View_OnClickListenerImplementor.onClick(View_OnClickListenerImplementor.java:30) at android.view.View.performClick(View.java:6669) at android.view.View.performClickInternal(View.java:6638) at android.view.View.access$3100(View.java:789) at android.view.View$PerformClick.run(View.java:26145) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6863) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) }

Answer 1

You should the LayoutInflater layoutinflater = LayoutInflater.From(Activity);

and Android.Support.V7.App.AlertDialog.Builder ProjectNameDialog = new Android.Support.V7.App.AlertDialog.Builder(Activity);

There is my code of fragment.(Do not forget the add ProjectNameDialog.Show(); pop up the AlertDialog)

     public class Fragment1 : Fragment
{
    public override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        // Create your fragment here
    }

    public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        View view = inflater.Inflate(Resource.Layout.activity_main, container, false);

        ImageButton btnAddProject = view.FindViewById<ImageButton>(Resource.Id.btnAddProject);
        btnAddProject.Click += delegate
        {
            LayoutInflater layoutinflater = LayoutInflater.From(Activity);
            View DialogView = layoutinflater.Inflate(Resource.Layout.setup_project_name_dialog, null);
            Android.Support.V7.App.AlertDialog.Builder ProjectNameDialog = new Android.Support.V7.App.AlertDialog.Builder(Activity);
            ProjectNameDialog.SetView(DialogView);

            EditText editProjectName = DialogView.FindViewById<EditText>(Resource.Id.et_name);
            ProjectNameDialog.SetCancelable(false);
            ProjectNameDialog.SetPositiveButton("Continue", delegate
            {
                //My own code here
            });

            ProjectNameDialog.Show();
        };
        return view;
    }
}

There is MainActivity.cs

    [Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]
public class MainActivity : AppCompatActivity
{

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.main);
       var Fragment1 = new Fragment1();
       FragmentManager.BeginTransaction()
                    .Add(Android.Resource.Id.Content, Fragment1)
                    .Commit();
    }


}

There is running GIF

Answer 2

Accordind to Xamarin Online Documentation, LayoutInflater.From method expects an Android.Content.Context object. So, assuming your fragment has been inherited from Android.App.Fragment, as Xamarin docs sample suggests, this regards to your fragment not you application context.

LayoutInflater layoutinflater = LayoutInflater.From(this);