Fullscreen virtual keyboard key handling

Hello,

I'm experiencing an issue when typing in a TextInput on Android when the keyboard is in fullscreen mode.

• The Backspace key does not update the screen immediately. The last character is removed but only becomes visible after closing the keyboard.

• The onTextChanged signal is triggered only for the Backspace key but not for other key presses, preventing me from processing text as needed.

• This issue does not occur on desktop or in vertical mode.

• In previous Qt versions (e.g., 6.6), the keyboard did not open in fullscreen mode, so this was not a problem (though I had to manually adjust the TextInput position for visibility).

Testing Details:

• Devices:

• • Virtual Androids: Android 9 and Android 13

• • Real Device: Motorola (Android 13)

• Findings on Real Device:

• • When pressing Backspace, the cursor moves left, but the character is not deleted if multiple TextInputs exist.

• • Closing and reopening the virtual keyboard allows Backspace to work correctly (this workaround does not work on virtual devices).

• Log Output:

• • Each time I press a key, the following log appears:
    D/InsetsController: show(ime(), fromIme=true)

• • However, when pressing Backspace, this log does not appear.

• JDK Versions Tested:

• • Oracle JDK 19

• • OpenJDK 17

I appreciate any guidance on resolving this issue. Let me know if you need further details.

Thanks!