Lesson Learned from building successful android library: PhotoEditor
summary
An Android Java library called PhotoEditor delivers pinch, text, filter, emoji and sticker editing and racks up 197,000 downloads and ~3,000 GitHub stars with 17 contributors; it simplifies integration by providing a single PhotoEditorView, exposes an interface instead of concrete classes to avoid breaking changes and uses a builder for text styles. Engineering lessons include custom-view touch math, undo/redo via a stack, ~30–40% test coverage, automated publishing and GitHub Actions CI/CD, and the surprise: invest in marketing and README.
AI-written summary · about
chapters (9)
- 0:00Introduction to PhotoEditor
- 2:11How it all started
- 4:47Android API design lessons
- 17:35Custom view and math basics
- 22:12Right data structures for features
- 24:43Open source testing and automation
- 31:53Unexpected lessons in open source
- 34:19The power of marketing
- 38:12Summary and acknowledgments
related talks
27mLive Coding: Let’s Build an Android Library
29mDon't reinvent the wheel, use libraries: Modern Android Stack
35mPractical Image Processing in Android
01h 28mMastering Screenshot Testing Libraries for Android: A Hands-On Workshop
42mBuilding a Video Editor
32mWriting Android Libraries
30mWhat I Learned in Two Years as an Android Engineer
36mBuilding UI Consistent Android Apps