Compress images and videos before upload + new upload/preview dialog + use system camera

[mahibi]

• resolve Use compression for images and files selected via gallery #5190

• resolve replace photo camera code with intent to open system camera #2461

  Adds automatic compression of images and videos before upload in chat, replaces the old attachment picker/preview dialog with a new Compose-based
  one, and removes the app's built-in camera capture screen in favor of the system camera.

• Compress images and videos before upload

  • New ImageCompressor/VideoCompressor utilities: images are downscaled and re-encoded as JPEG; videos are downscaled to 540p (short side) and
    transcoded via Media3 Transformer on a dedicated HandlerThread, keeping the main thread unblocked.
  • BitmapShrinker modernized to use ImageDecoder on API 28+ (single-pass decode+scale with automatic EXIF rotation for JPEG/HEIC), falling back to
    the previous BitmapFactory path on API 26/27.
  • UploadAndShareFilesWorker shows live "Compressing… X%" progress (via Transformer.getProgress()) before switching to the upload progress notification.
    --> this is just a temporary solution until in chat upload previews are implemented.
  • Fixes MIME-type resolution for file:// URIs (e.g. camera-captured photos/videos), which previously broke dialog/thumbnail detection since
    ContentResolver.getType() only handles content:// URIs.

• New attachment preview/upload dialog

  • FileAttachmentPreviewFragment/FileAttachmentPreviewDialogCompose rewritten in Jetpack Compose, with thumbnails and per-file dimensions/size shown
    before sending.

• Media quality setting

  • The compression toggle is now a "Sent media quality" setting under Settings, presented as a dialog with Original quality / Reduced quality
    options (previously a simple switch), persisted via AppPreferences.

• Removed built-in camera

  • Deleted TakePhotoActivity, TakePictureViewModel, and the associated layout/drawables. Photo/video capture now goes through the system camera;
    PickImage, ConversationCreationActivity, ConversationInfoEditActivity, and ProfileActivity updated accordingly.

Assisted-by: Claude Code 2.1.199:claude-sonnet-5

🖼️ Screenshots

before

after

work in progress....

🚧 TODO

• ...

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔖 Capability is checked or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/30387637532/artifacts/8699821637
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/30388822788/artifacts/8700239068
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[jancborchardt]

It would be nice to formulate and design it a bit less technical. Signal e.g. specifically calls it "Sent media quality" with an easy to understand "Low" and "High" setting.

I'd say we could have a single-select segmented button in the send flow with:

• Original quality
• Reduced quality

And last selected setting remembered. What do you think @nimishavijay

[mahibi]

For reference: thats how signal does it in the send flow (in the left pic it is the (crossed) HD button):

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/30476294926/artifacts/8734032240
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[nimishavijay]

If we are able to have a fullscreen preview of the image before sending like in whatsapp,telegram, signal, etc, the HD/SD icon-only button is pretty standard. if that is not possible then the radio-style buttons in the current UI make sense :)

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/30641574479/artifacts/8797835298
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/talk-android/actions/runs/30656399981/artifacts/8803577048
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)