SolidCraft 0.22.0a for Android

SolidCraft 0.22.0a for Android (SolidCraft 0.22.0, port release a).

Built from upstream SolidCraft v0.22.0 (0537623a) with the Android port on top.

New in this release: upstream SolidCraft 0.22.0 (the Render workspace, frames, hole placement and tapped-hole catalogues, and more: upstream's notes), and the port's helical B-rep threads: smooth exact threads instead of faceted ones, custom pitches on any shaft or hole, clearance for printed parts, start and end offsets, left-handed threads (guide). Tested on a Galaxy Z Fold.

Install: download SolidCraft-0.22.0a-android-arm64.apk on an Android 8.0+ phone or tablet (arm64) and open it, allowing installs from that source; or adb install -r SolidCraft-0.22.0a-android-arm64.apk. Signed with a development key: uninstall a build from elsewhere first if Android refuses to update it.

Works: the full SolidCraft app (sketches, features, the timeline, the Render workspace) on Vulkan or GLES; mouse and keyboard as on the desktop (hover, selection, navigation buttons, wheel, right-click menu, shortcuts); touch (one finger orbits, tap selects, two fingers pan, pinch zooms, a finger drags a dialog's arrows); Back closes what is open; open, save, import and export through Android's file picker (STEP, STL, 3MF and OBJ tested); the on-screen keyboard for typing. Port-only: helical B-rep, custom and clearance threads (docs/android-threads.md); designs with them are a newer file format than upstream's release reads.

Not yet: the on-screen keyboard covers the lower half of the screen (the app doesn't move above it), a phone-sized layout (best on a tablet or a foldable's inner screen), autosave recovery. How to use it: docs/android-touch.md; details: docs/android.md.