FurtherSecrets24680/chemsearch-android 1.4.0

ChemSearch v1.4.0 - Bottom navigation system, Chemistry tools, SDF downloader etc.

on GitHub

What's New

• Complete bottom navigation overhaul with a modern NavigationBar featuring five tabs: Search, Favorites, Recent, Tools, and Settings.
• Entirely new "Tools" suite for chemical calculations (more to be added soon):
  • Custom 3D Molecule Viewer (supports local .sdf and .mol files)
  • Molar Mass Calculator with precise elemental breakdowns and mass percentages
  • Oxidation State Finder (algebraic solver handling peroxides, superoxides, and metal hydrides)
  • SMILES Visualizer (2D/3D via PubChem)
  • Reaction Balancer (automatic stoichiometric balancing using rational matrix math)
• Hidden Debug Settings menu (unlock by tapping the build version 5 times) with live log viewer, SharedPreferences inspector, memory info, verbose logging toggle etc.
• SDF download button directly in the 3D Structure Viewer (saves to Downloads folder).

Improvements & Fixes

• Smooth horizontal slide animations for all top-level tab transitions using AnimatedContent.
• Redesigned CompoundHeader with compact modern layout and vertical gradient accents.
• Enhanced SearchBar with circular action button, better clear functionality, and improved autocomplete dropdown (max height + scrolling).
• Upgraded SafetySection with full GHS pictogram descriptions and signal word icons.
• Added comprehensive InfoDialog tooltips for every new tool and identifier.
• Refined loading states and animated transitions throughout compound lookups.
• Updated Settings screen with new theme selection dropdown and expandable Debug section.

Technical Changes

• Major refactor of MainScreen.kt to handle cross-tab state and inline navigation.
• New Frac (Fraction) class for exact arithmetic in the Reaction Balancer.
• DebugLog utility for centralized in-app and system logging.
• WRITE_EXTERNAL_STORAGE permission handling for Android API ≤ 28 to support SDF downloads.
• Extensive debug logging added across search, autocomplete, and description flows in ChemViewModel.
• Full Material 3 refinements, consistent padding, and color scheme updates across the app.
• Updated README.md with documentation for all new native tools and developer options.