PDF Viewer then and now — PdfRenderer improvements in Android 15

on YouTube ↗38m

" summary

Covers building a custom Android PDF viewer using the platform PdfRenderer API and Jetpack Compose, including code for Compose lists, scrolling/zoom gestures, and rotation-safe state via ViewModel. Presents fixes for crashes by adding per-renderer page locks and reducing bitmap size to view-size, implements an LRU-like bitmap cache with Coil for disk caching, and documents new Android 15 PdfRenderer features (annotations, search, forms, password handling) plus a demo Compose gestures implementation and an alpha AndroidX PDFFragment running on Android 15+.

AI-written summary · about

" chapters (36)

1. 0:00Introduction
2. 1:07Displaying PDFs on Android
3. 2:35Simple PDF viewer
4. 4:23Understanding PDFRenderer
5. 5:04PDFRenderer from file URI
6. 6:07PDF pages to bitmaps
7. 7:54Display single page
8. 8:17Multi-page PDF list
9. 9:24Fixing multi-page crashes
10. 10:30Thread-safe page access
11. 10:53Zoom and pan gestures
12. 12:45Panning restrictions
13. 13:54Tap gestures for zoom
14. 15:18Finalizing gestures
15. 15:39Rotation with ViewModel
16. 16:22Optimizing bitmap generation
17. 17:50Testing rotation
18. 18:13Reducing bitmap memory
19. 19:41Bitmap caching
20. 21:07Coil for caching
21. 23:14Custom vs Coil caching
22. 24:20Benchmarking performance
23. 25:26Android 15 PDFRenderer features
24. 26:52Displaying annotations
25. 27:33Password-protected PDFs
26. 28:14Extracting PDF content
27. 28:58Text search in PDFs
28. 29:41Interactive PDF forms
29. 31:09Saving edited PDFs
30. 31:53AI PDF summarization
31. 32:16Form editing workflow
32. 33:20AndroidX PDF library
33. 34:28Using PDFViewerFragment
34. 35:30Testing AndroidX viewer
35. 36:40PDF display methods
36. 37:24Q&A

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