Android Question How to Toggle the NavigationBar On and Off at Runtime with B4XPages and AppCompat?

ykucuk · Aug 5, 2024

Hi everyone,

I'm currently using B4XPages and axrlottie, which requires me to use appcompat. While I am using

B4X:

#IncludeTitle: false

to hide the title bar, I am unable to hide the NavigationBar on the MainPage.

Could someone please guide me on how to dynamically show and hide the NavigationBar during runtime? Any help or code examples would be greatly appreciated.

Thank you!

Erel · Aug 6, 2024

B4X:

Private Sub SetActionBarState(Visible As Boolean)
    Dim jo As JavaObject
    jo.InitializeContext
    jo.RunMethodJO("getSupportActionBar", Null).RunMethod(IIf(Visible, "show", "hide"), Null) 'change to "getActionBar" for non-AppCompat
End Sub

ykucuk · Aug 7, 2024

Erel said:

B4X:

Private Sub SetActionBarState(Visible As Boolean)
    Dim jo As JavaObject
    jo.InitializeContext
    jo.RunMethodJO("getSupportActionBar", Null).RunMethod(IIf(Visible, "show", "hide"), Null) 'change to "getActionBar" for non-AppCompat
End Sub

Hello Erel,

The code you provided works correctly, but there's an issue. When I close the bar, a section remains empty below, equal to the height of the bar. It does not fit 100%. The root screen does not cover the entire display. I have attached a screenshot. How can I prevent this?

Erel · Aug 8, 2024

It is not so simple. You will need to resize the activity. You can see an example here: https://www.b4x.com/android/forum/t...through-orientation-change.37511/#post-222072

Android Question How to Toggle the NavigationBar On and Off at Runtime with B4XPages and AppCompat?

ykucuk

Well-Known Member

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Erel

B4X founder

ykucuk

Well-Known Member

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Erel

B4X founder

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Android Question How to Toggle the NavigationBar On and Off at Runtime with B4XPages and AppCompat?

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