our demo app shall only 13M apk size for debug build, even include x86 libraries.
there are some points may help you:
1.remove "x86_64" and "x86" arch libraries, if you are sure your app never run on x86 devices.
2.check images and other assets that you added to app, avoid large images, and same image from different location.
3.delete files in assets, like "$RDPDFReader\src\main\assets"
4.remove codes never used, no from packages "com.radaee.pdf", "com.radaee.util", "com.radaee.view".
5.check your other third party reference.
6.there is 3 modules in demo project: "PDFReader","RDPDFReader","ViewLib", you can remove module "PDFReader" if you only using "RDPDFReader"
"ViewLib" is base module referenced by both "PDFReader" and "RDPDFReader".
"PDFReader" is deprecated module based on deprecated classes. currently, we use "RDPDFReader" to run reader.
at last, plz check your project, and compare to the demo project.