[BUG]: Talkback is not reading concept card link on Solution box

[subhajitxyz]

Describe the bug

TalkBack is not reading the concept card link in the solution box on the flashback screen and Hints Dialog. However, TalkBack correctly reads the concept card link in the hints and solution box.

Steps To Reproduce

For Flashback solution box

• Turn on Flashback feature flag
• Go to First test topic.
• Navigate to the question: "Two numbers are respectively 20%...".
• Submit wrong answer "4:7" and click "See Example" button.
• Turn on talkback.
  • Go to Phone Settings → Accessibility → TalkBack (or Screen Reader) and enable it.

For solution box on Hint's dialog

• Go to First test topic.
• Move to second state.
• Submit two wrong answers, wait for hints and see solution.
• Turn on talkback.
  • Go to Phone Settings → Accessibility → TalkBack (or Screen Reader) and enable it.

Expected Behavior

Talkback should read concept card link.

Screenshots/Videos

Record_2025-08-12-20-41-38_943a62cb4c6fb83e010e1c2e82766a17.mp4

Record_2025-08-12-20-40-08_943a62cb4c6fb83e010e1c2e82766a17.mp4

What device/emulator are you using?

Oppo reno 2f

Which Android version is your device/emulator running?

No response

Which version of the Oppia Android app are you using?

No response

Additional Context

• Check SolutionViewModel, CustomHtmlContentHandler.

• Add test in StateFragment and StateFragmentLocalTest.

• For reference, check this implementation of content description for HintViewModel

[adhiamboperes]

@subhajitxyz, thanks for filing this issue! Could you please edit the issue body and add more information about this, e.g. whether talkback reads links in the hints and solutions dialog, and how to trigger the flashback view(as part of the repro steps)

[subhajitxyz]

@adhiamboperes , I have updated issue description and Additional context for GFI breakdown.

[adhiamboperes]

Hi @subhajitxyz, could you please add a summarized explanation in the additional context section about what could be causing the bug.

[CodeWithSangeeta]

Hi! 👋
I am new to Oppia Android and this is the first issue I picked to explore.
I followed all the steps mentioned in the issue to reproduce the TalkBack behavior.

🔍 What I tested

• Device: Vivo T2x
• Oppia Android: dev build (installed via Bazel)
• TalkBack: latest version from Accessibility settings
• Feature Flags → Flashback Support: ON

📝 Steps I followed

• Opened Oppia app
• Opened First Test Topic
• Found the question “Two numbers are respectively 20% more than…”
• Submitted the wrong answer 4:7
• The “See Example” option appeared
• (In my UI, the screen title is “Example”, not “Revisit Previous Question” as shown in the original video. I think the UI has been updated since the issue was created.)
• Turned on TalkBack
• Focused on all the links inside the explanation text

🎧 Observed TalkBack behavior on my device

• TalkBack correctly reads the link text
• Then it announces “Action available. Double tap to activate.”
• This matches the expected TalkBack behavior for accessible links.

📌 Conclusion from my testing

• I could not reproduce the issue described in the video.
• Instead of the incorrect announcements shown in the old video, the behavior on my device seems fully correct.

❓ Questions for maintainers

• Is this issue device-specific or already resolved in recent UI changes?
• Is there a different screen / scenario where the problem still occurs?

I am happy to re-test and continue investigating with your guidance.
Thank you! 🙌

[subhajitxyz]

@CodeWithSangeeta ,Thanks for attempting to reproduce the issue.
I’m still able to reproduce it on my end. Could you please share a screen recording of the exact steps you followed?