I am trying to implement a menu on my app bar but why I can't find it under Resource? As you can see, it has color red under it's name. I tried to right click on it but it only says generate menu method. I can't rebuild and deploy it since it gives me that kind of weird error. Also what happen after that is my VS can't read even the Resource itself. I can only solve it if I add another activity or delete it or to restart the VS.

Here is my Menu folder.

]2

Here is my full code for activity

using System;
using Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Android.Support.V7.App;
using Android.Support.V7.Widget;
using SupportToolbar = Android.Support.V7.Widget.Toolbar;
using Entities;

namespace RBankCI

 [Activity(Label = "PDRN", MainLauncher = true, Theme = "@style/Theme.FullScreenBaseDesign")]
 public class Activity_PDRN : AppCompatActivity, IActivityInterface
 
 protected override void OnCreate(Bundle savedInstanceState)
 
 base.OnCreate(savedInstanceState);
 SetContentView(Resource.Layout.Layout_PDRNForm);
 Title = string.Empty;
 i1_setupActionBar();
 

 public void i1_setupActionBar()
 
 // Initialize Support ToolBar
 SupportToolbar toolBar = FindViewById<SupportToolbar>(Resource.Id.toolBar);
 toolBar.SetBackgroundResource(Resource.Drawable.AppBarBackgrounWithTitle);
 SetSupportActionBar(toolBar);
 SupportActionBar.SetDisplayHomeAsUpEnabled(true);
 

 public void i2_initialization()
 
 throw new NotImplementedException();
 

 public void i3_deserializeIntentExtras()
 
 throw new NotImplementedException();
 

 public void i4_setUpAllClickable()
 
 throw new NotImplementedException();
 

 public void i5_setTextChangeBehaviour()
 
 throw new NotImplementedException();
 

 public void i6_setTextFieldValues()
 
 throw new NotImplementedException();
 

 #region Override OnCreateOptionsMenu()
 /// <summary>
 /// Create a menu setting
 /// </summary>
 /// <param name="menu">Menu</param>
 /// <returns></returns>
 public override bool OnCreateOptionsMenu(IMenu menu)
 
 //Here is the problem. My VS can't read the Menu after Resource

 // Create Menu Action
 MenuInflater.Inflate(Resource.Menu.menu_form, menu);

 return true;
 
 #endregion

 #region Override OnOptionsItemSelected()
 /// <summary>
 /// Event when a user clicks one of the ActionBar Icons
 /// </summary>
 /// <param name="item">Action Item</param>
 /// <returns></returns>
 public override bool OnOptionsItemSelected(IMenuItem item)
 
 // Open Navigation Drawer
 switch (item.ItemId)
 
 // User click menu icon
 case Android.Resource.Id.Home:
 OnBackPressed();
 return true;
 case Android.Resource.Id.menu_clear: //here, I can see and error a constant value is expected. This id is under the menu_form.xml
 Toast.MakeText(this, "Clear All Fields", ToastLength.Short).Show();
 return true;
 case Resource.Id.menu_attach: //here, I can see and error a constant value is expected. This id is under the menu_form.xml
 Toast.MakeText(this, "Attach Photo", ToastLength.Short).Show();
 return true;
 default:
 return base.OnOptionsItemSelected(item);
 
 
 #endregion

 #region Override OnBackPressed()
 /// <summary>
 /// Override OnBackPressed
 /// </summary>
 public override void OnBackPressed()
 
 try
 
 Finish();
 
 catch (Exception e)
 
 Toast.MakeText(this, ENT_NegativeResponse.somethingWentWrong, 0).Show();
 
 
 #endregion
 

Here is my menu_form.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--For all properties see: http://developer.android.com/guide/topics/resources/menu-resource.html-->
<menu xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto">

 <!-- Declaring Menu Actions -->
 <item
 android:id="@+id/menu_clear"
 android:title="Clear All Fields"
 android:icon="@drawable/ic_clear_fields_png_x3"
 app:showAsAction="ifRoom"/>

 <item
 android:id="@+id/menu_attach"
 android:title="Attach Photo"
 android:icon="@drawable/ic_attach_image_png_x3"
 app:showAsAction="ifRoom"/>

</menu>

Use this-:

MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_form, menu);

In this case Import R file that is of your current package

Menu is missing under Resources - XAMARIN

Check if the resource id has been generated in Resource.designer.cs.

In my project, the resource id is :

public partial class Id

 ...
 // aapt resource value: 0x7f0b007b
 public const int menu_attach = 2131427451;

 // aapt resource value: 0x7f0b007a
 public const int menu_clear = 2131427450;
 ...


...

public partial class Menu


 // aapt resource value: 0x7f0d0000
 public const int menu_form = 2131558400;

 static Menu()
 
 global::Android.Runtime.ResourceIdManager.UpdateIdValues();
 

 private Menu()
 
 

Solution :

If it has not been generated, usually clean and rebuilding the project will generate it again, unless there is a syntax error somewhere.

UPDATE

Updating Xamarin for Visual Studio solved the issue for missing Menu under Resource . Got the blue-green color after

I found it back from my Resource.Designer.cs although it still have a message under it: 'Resource' does not contain a definition for 'Menu' and for the buttons they have "A constant value is required". But still it is working with redlines.

For reference of others, this is what I did.

My VS.Xamarin is good with my menu before until it prompts me with message that it is not recognizable. Here are my steps that I tried:

1. Restarted the VS

2. Removed bin and obj under project

3. Removed xamarin folder content under user/appdata/local/xamarin

4. Clean and Rebuild as many as I can

5. Create new menu folder under resource

6. Create menu file from add button but I think this is also a problem

Part of Soution

menu under add button generates menu_form.xml file while xamarin read an .axml format. So my solution is to create a layout, copy what my menu_form.xml have and clean then rebuild. Menu, menu_form and it's elements showed up to Resource.Designer.cs after that.

It's actually a problem for me since it is working before but suddenly stopped and gave me an error.

Still I have an error regarding Resource.Menu the same from the beginning with a red line yet it's working well. I don't know why my VS gives me that error.

Make sure you've edit it:

(Change BuildAction to AndroidResource)