StateManager will save the vars (and restore) when screen flips from Portrait to Landscape (and back).
However, as I have found, when a custom panel is in view, and screen rotates, it is dismissed and you have to start over (unless you like to create MUCH code to work around this).
So, to avoid all this, I lock the screen to the orientation (either port or land) when the user first accessed the selected activity. This prevents the screen from flipping during the activity session.
IF this activity DOES NOT call another activity, you may not require StateManager...
In the Activity_Resume, Include... yourcodemod.ForceOro
In the Activty_Pause include... yourcodemod.ReSetOro
The above subs are placed in your code module.
In my mind, it is a pity we have to do any of this. Rotating the screen is handled badly in Android. At the very least, Android should have had a setting to Lock the activity to current Oro (Resume), and set it either when Activity.Finish (or Pause). Look at the hoops (and code) we must create to deal with this... time after time...
However, as I have found, when a custom panel is in view, and screen rotates, it is dismissed and you have to start over (unless you like to create MUCH code to work around this).
So, to avoid all this, I lock the screen to the orientation (either port or land) when the user first accessed the selected activity. This prevents the screen from flipping during the activity session.
IF this activity DOES NOT call another activity, you may not require StateManager...
In the Activity_Resume, Include... yourcodemod.ForceOro
In the Activty_Pause include... yourcodemod.ReSetOro
The above subs are placed in your code module.
B4X:
Sub ForceOro
Dim loa As LayoutValues
Dim pl As Int = -1
' pl = Port or Land - 1 is any, 0 = landscape, 1 = portrait
If loa.Height > loa.Width Then
pl = 1
Else
pl = 0
End If
ph.SetScreenOrientation( pl ) ' requires phone lib in your code module...
End Sub
B4X:
Sub ReSetOro
ph.SetScreenOrientation( - 1 ) ' set to any rotation
End SubIn my mind, it is a pity we have to do any of this. Rotating the screen is handled badly in Android. At the very least, Android should have had a setting to Lock the activity to current Oro (Resume), and set it either when Activity.Finish (or Pause). Look at the hoops (and code) we must create to deal with this... time after time...