Android Question How to avoid DoEvents in this case?

LucaMs · Jul 19, 2017

I have an invisible EditText; when I set it to visible I want to show an IME keyboard (which puts the focus on it).

I used code similar to this:

B4X:

EditText1.Visible = True
CallSubDelayed2(Me, "ShowKeybord", EditText1)


Sub ShowKeybord(et As EditText)
    IMEKeyboard.ShowKeyboard(et)
End Sub

It works in debug mode; in release mode the EditText gets the focus but the sw keyboard is not shown.
Writing a DoEvents before IMEKeyboard.ShowKeyboard(et), all work as expected.

How to avoid DoEvents in this case?

LucianDesign · Jul 19, 2017

Did you tried Sleep(0) instead of DoEvents?

Discussions on this: https://www.b4x.com/android/forum/threads/sleep-0-as-alternative-to-doevents.80127/

LucaMs · Jul 19, 2017

LucianDesign said:
Did you tried Sleep(0) instead of DoEvents?

Ops... no, I didn't. Since Sleep returns control to calling routines, I "fear" flow problems, so I try to avoid also Sleep. In this case, however, the calling routine is a view event routine, so it works without risk.

Thank you.

tigrot · Jul 19, 2017

DoEvents as far as I know allows next events to be processed. Flow is lost in any case. I never use this feature in any OS when on multi thread.

LucaMs · Jul 19, 2017

tigrot said:
DoEvents as far as I know allows next events to be processed. Flow is lost in any case. I never use this feature in any OS when on multi thread.

VB.Net DoEvents does not return control to the calling routine, it allows the system to process events. B4a DoEvents is different.

Erel · Jul 20, 2017

The CallSubDelayed is not needed here.

It should be:

B4X:

EditText1.Visible = True
Sleep(50)
IMEKeyboard.ShowKeyboard(et)

Android Question How to avoid DoEvents in this case?

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