Android Question B4X Pages, IME and Application Resume

asmondien · Feb 2, 2026

Hello,

Hope you can help - I'm getting back to b4a, and been struggling with b4x pages, and keyboard when closing and opening.

On registration page, I need to push the view top by X, so it's show the input boxes behind the keyboard, I did saw there is an option to use scroll view, but I thought I try the IME from what I saw the tutorial, and other posts.

I used the code from this post : https://www.b4x.com/android/forum/threads/how-to-detect-if-ime-soft-keyboard-is-closed.141183/

B4X:

Sub IME_HeightChanged(NewHeight As Int, OldHeight As Int)
    Private IsIMEKeyboardClosed As Boolean = (NewHeight = ActivityHeight)
    LogColor("IsIMEKeyboardClosed >>   " & IsIMEKeyboardClosed, Colors.Red)
End Sub

My if check -

B4X:

    If IsIMEKeyboardClosed = True Then           
        contentPanel.SetLayoutAnimated(400, contentPanel.Left, OriginalTop, contentPanel.Width, contentPanel.Height)
    Else       
        contentPanel.SetLayoutAnimated(400, contentPanel.Left, OriginalTop - 120dip, contentPanel.Width, contentPanel.Height)
    End If

Which does what it suppose to - I can move the layout to the top and see the input boxes, and keyboard closes and it's back to bottom.

However if I press the lock screen button on phone, and come back - this stop functioning and won't move the layout back to top by X

So, is this the best practice? and What is the solution to make the the IME_HeightChange triggers again after resume?

Thank you.

LucasHeer · Feb 2, 2026

Hey!

If you are using B4XPages, then you will delegate out the KeyboardStateChanged event from your Main activity using IME.

Meaning -- Whichever page you are working on can have a B4XPage_KeyboardStateChanged(Height as int) definition.

See B4XPages: https://www.b4x.com/android/forum/t...or-managing-multiple-pages.118901/post-745090

Add this to your manifest:

B4X:

SetActivityAttribute(main, android:windowSoftInputMode, adjustResize|stateHidden)

In your main module:

B4X:

Sub Globals
    Private ime As IME
End Sub

Sub Activity_Create(FirstTime As Boolean)
    ime.Initialize("IME")
    ime.AddHeightChangedEvent
    Dim pm As B4XPagesManager
    pm.Initialize(Activity)
End Sub...

LucasHeer · Feb 2, 2026

Hey!

If you are using B4XPages, then you will delegate out the KeyboardStateChanged event from your Main activity using IME.

Meaning -- Whichever page you are working on can have a B4XPage_KeyboardStateChanged(Height as int) definition.

See B4XPages: https://www.b4x.com/android/forum/t...or-managing-multiple-pages.118901/post-745090

Add this to your manifest:

B4X:

SetActivityAttribute(main, android:windowSoftInputMode, adjustResize|stateHidden)

In your main module:

B4X:

Sub Globals
    Private ime As IME
End Sub

Sub Activity_Create(FirstTime As Boolean)
    ime.Initialize("IME")
    ime.AddHeightChangedEvent
    Dim pm As B4XPagesManager
    pm.Initialize(Activity)
End Sub

Sub IME_HeightChanged (NewHeight As Int, OldHeight As Int)
    B4XPages.GetManager.RaiseEvent(B4XPages.GetManager.GetTopPage, "IME_HeightChanged", Array(NewHeight, OldHeight))
End Sub

Then, in each page where you need dynamic views based on keyboard height, you add your procedure. Here is an example of where I use it in Page_Login (A B4XPage for B4i/B4a):

B4X:

Private Sub B4XPage_KeyboardStateChanged(Height As Int)
    #if b4i
        If Height > 0 Then 'Keyboard Enter
            loginPanel.Top = Root.Height - Height - loginPanel.Height - 20dip
        Else
            loginPanel.Top = (Root.Height / 2) - (loginPanel.Height /2)
        End If
    #Else If b4a
        loginPanel.Top = (Height / 2) - (loginPanel.Height /2)
    #End If
End Sub

This is great -- because you only need to define once in your main activity and can have your keyboard event throughout all of your pages.

asmondien · Feb 3, 2026

Thank you, much appreciated - note to self, do better search xD

Android Question B4X Pages, IME and Application Resume

asmondien

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LucasHeer

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asmondien

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Android Question B4X Pages, IME and Application Resume

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