findViewById returns null on inside views of include

Question

I have similar problem like this thread findViewById returns null on a LinearLayout inside an <include>d view

I have similar problem:

xml that calls the include block:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            ...>
    <include  
                android:id="@+id/popupMenu"
                layout="@layout/mainmenu_popup" /> 
    </RelativeLayout>

and mainmenu_popup.xml that contains the included code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:visibility="gone"
        android:layout_marginTop="@dimen/action_bar_height"
        android:layout_width="0dp"
        android:layout_height="0dp">
      <fragment
        android:id="@+id/mainmenupopup_fragment"
        class="RetailMobile.MainMenuFragment" />
    <TextView
            android:layout_width="fill_parent"
            android:layout_height="1dp"
            android:layout_below="@id/mainmenupopup_fragment" 
            android:background="@color/dark_blue"
            android:id="@+id/blueLine" />
    <RelativeLayout
        ...
    </RelativeLayout>
</RelativeLayout>

I follow Luksprog's answer

RelativeLayout popupMenu = this.Activity.FindViewById<RelativeLayout>(Resource.Id.popupMenu);

but popupMenu == null

i also checked this thread findViewById not working for an include? with no positive result.

In what activity life cycle event you call findViewById? If you call it before you set the contentView for activity, then it would fail. — neo, Jun 17 '13 at 15:31
I try to access it from OnCreateView method of a Fragment, after Inflate on its layout(the one with ). — Mariyan Marinov, Jun 18 '13 at 06:53

score 2 · Answer 1 · answered Jun 17 '13 at 14:42

2

add android:id to RelativeLayout in mainmenu_popup.xml and then find view by id defined there

answered Jun 17 '13 at 14:42

Dmitry Guselnikov

1,048
1
8
21

score 0 · Answer 2 · answered Jun 18 '13 at 12:15

0

I found the solution mainmenu_popup.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/popup_mainmenu">
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/popup_mainmenu_inner"> ...

then i refer to popup_mainmenu_inner:

 this.Activity.FindViewById<RelativeLayout>(Resource.Id.popup_mainmenu_inner);

answered Jun 18 '13 at 12:15

Mariyan Marinov

45
8

not so happy so far because i found that if my parent container is Fragment(where i `call FindViewById(Resource.Id.popup_mainmenu_inner)`) it is still null, only works if parent container is FragmentActivity or Activity – Mariyan Marinov Jun 18 '13 at 12:46

findViewById returns null on inside views of include

2 Answers2