How do I develop using the classes and methods of hide in Android?

1. Get the Android source code and compile it.

2. After compiling, remove the Classes.jar under the Out\target\common\obj\java_libraries\framework_intermediates path

3. Rename the Classes.jar to Framework.jar and add it to the Libs directory of the Android studio project.

4. In dependencies in Build.gradle, add:

//     Compile Filetree (inlcude: [' *.jar '], dir: ' Libs ')     provided files ('Libs/framework.jar  ')

Reference: Only used at compile time, not packaged

How do I develop using the classes and methods of hide in Android?