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Bug 4892

Summary: Android backspace key not working on Pixel 3 native keyboard
Product: SDL Reporter: MatD <mat.draper>
Component: eventsAssignee: Sam Lantinga <slouken>
Status: NEW --- QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: sylvain.becker
Version: 2.0.8   
Hardware: ARM   
OS: Android (All)   

Description MatD 2019-12-09 16:10:34 UTC 
We’re not getting any events from the backspace key on the Android soft keyboard, for quite a few newer Android devices (eg. Google Pixel 3).
Comment 1 Sylvain 2019-12-10 09:24:01 UTC 
I'd say, put some trace in the SDLActivity.java file, in onBackPressed()
Comment 2 MatD 2019-12-10 11:32:19 UTC 
Hi Sylvain, thanks for the quick reply.

I can confirm (from using breakpoints in SDLActivity.java) that...

On A Nexus 7 running Android 6.0.1, the soft-keyboard delete key triggers:

sendKeyEvent (line 1592) followed by
dispatchKeyEvent (line 375) followed by 
onKey (line 1537)

But on a Google Pixel 3a with Android 10, the delete key triggers sendKeyEvent then dispatchKeyEvent but *not* onKey.

Does this help?
Kind regards
-Mat
Comment 3 MatD 2019-12-10 12:12:30 UTC 
(In reply to MatD from comment #2)
> Hi Sylvain, thanks for the quick reply.
> 
> I can confirm (from using breakpoints in SDLActivity.java) that...
> 
> On A Nexus 7 running Android 6.0.1, the soft-keyboard delete key triggers:
> 
> sendKeyEvent (line 1592) followed by
> dispatchKeyEvent (line 375) followed by 
> onKey (line 1537)
> 
> But on a Google Pixel 3a with Android 10, the delete key triggers
> sendKeyEvent then dispatchKeyEvent but *not* onKey.
> 
> Does this help?
> Kind regards
> -Mat


As a workaround, we have added the following to dispatchKeyEvent:

        if(keyCode == KeyEvent.KEYCODE_DEL)
        {
            if(event.getAction() == KeyEvent.ACTION_DOWN)
                SDLActivity.onNativeKeyDown(keyCode);
            else
                SDLActivity.onNativeKeyUp(keyCode);
        }
Comment 4 Sylvain 2019-12-10 12:50:33 UTC 
Hi Mat, 

Not sure about the lines numbers. Which version is this ?
Anyway, I would advice to try the head SDL version!

There are two onKey() methods: the normal one, another one in DummyEdit, which is triggered if you make the soft keyboard appears with  SDL_StartTextInput();

On the pixel 3a, how the backspace behave compared to another key ?
Comment 5 Sylvain 2019-12-10 12:51:54 UTC 
( I tried on a recent phone with android 10 and the soft-keyboard backspace appears in the onKey on DummyEdit )
Comment 6 MatD 2019-12-10 13:15:30 UTC 
Thanks for trying that.

We are currently on 2.0.8, we will look at moving to the latest version.
Regards
-Mat
Comment 7 Sylvain 2019-12-19 13:07:15 UTC 
maybe an issue with focus when hiddin the keyboard
see bug 4906
Comment 8 Sylvain 2020-10-07 07:10:22 UTC 
Do you have more information ?