You can decompile android apps, which will give mostly the original Java Classes / functions with anonymized names (class A, function b, etc...). Framework clas

You can decompile android apps, which will give mostly the original Java Classes / functions with anonymized names (class A, function b, etc...). Framework classes and methods usually stay pretty much the same. See for example https://github.com/robertohuertasm/apk-decompiler https://github.com/robertohuertasm/apk-decompiler and https://github.com/vaibhavpandeyvpz/apkstudio https://github.com/vaibhavpandeyvpz/apkstudio (only used the first one but the seconds looks practical)