Android Question App reload when change orientation on phone

Waldemar Lima

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Longtime User
hello everyone !!
why application reload when i change phone orientation ??

B4X: 
#SupportedOrientations: unspecified

is there any way to prevent this?
 
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OliverA

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Because that is how Android works. It’s Android that is shutting down and then restarting your application.
 
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OliverA

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That is an issue that even Almight cannot prevent (sorry for the corny joke)
 
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josejad

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Maybe this thread helps you to understand what is happening when you change orientation

Graphical Life Cycle of a B4A Activity

Hi all... I'm posting this in the hopes that it'll help anyone programming with B4A to understand the life cycle of an activity. I struggled with this a bit, and the graphical representation made it easier for me to understand. I hope it helps some of you. (Thanks to Erel for proofing it for...
www.b4x.com
 
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Waldemar Lima

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Licensed User
Longtime User
but if i use this code >

B4X: 
Sub Orientation_OrientationChanged (Azimuth As Float, Pitch As Float, Roll As Float)
    'Log("Orientation > "&GetOrientation)
    
    If (GetOrientation = 0) Then

        If (orientation = 0) Then
            ' ignore
        Else if (orientation = 1) Then
            orientation = 0
            Log("Portrait")
            Activity.RemoveAllViews
            LogColor(SessionID.Get(Session),Colors.Blue)
            Activity.LoadLayout(SessionID.Get(Session))
        End If
    Else If (GetOrientation = 1) Then
        
        If (orientation = 0) Then
            orientation = 1
            Log("LandScape")
            Activity.RemoveAllViews
            LogColor(SessionID.Get(Session),Colors.Blue)
            Activity.LoadLayout(SessionID.Get(Session))
        Else if (orientation = 1) Then
            'ignore
        End If
    End If
    
End Sub

can I get the layout to update to landscape or portrait mode without the app restarting?
 
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MicroDrie

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Longtime User
Without knowing your application completely, I wonder why you delete all views when the orientation changes. The normal behavior in Android is that the image is rebuilt with a rotation. Then why delete the views? Perhaps it is therefore useful when designing the screen to take into account both screen orientations without having to remove the views.
 
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