If you faced any problem when you try to Migrate to Androidx using the android studio option then this script will help you a lot. you just need to give it the project directory path and the mapping file in format of csv and you're done ;)

migration_algorithms.md

Migration to Androidx

this is a python script to migrate from Support Library Class to Androidx Class

Migrate to Androidx script in case the automatic way to migrate from support library class to androidx doesn't work well you can run this script to replace every old package in the project with androidx packages

# Driver functions
import os
import pandas as pd
import csv

These are the the directory path to the project we want change and the mappings in csv format here the link to download it (https://developer.android.com/jetpack/androidx/migrate/class-mappings)

# here change the path according to your project
project_path="C:\\Users\\Sliman2015\\Downloads\\my_code"
csv_path="androidx-class-mapping.csv"
fileExtension = [".xml",".java",".kt"]
dicts={}

Read the csv file

Read the csv file of the support library class and androidx class

data = pd.read_csv(csv_path)
df = pd.DataFrame(data)
df.head()

Support Library class Android X class 0 android.arch.core.executor.AppToolkitTaskExecutor androidx.arch.core.executor.AppToolkitTaskExec... 1 android.arch.core.executor.ArchTaskExecutor androidx.arch.core.executor.ArchTaskExecutor 2 android.arch.core.executor.DefaultTaskExecutor androidx.arch.core.executor.DefaultTaskExecutor 3 android.arch.core.executor.JunitTaskExecutorRule androidx.arch.core.executor.JunitTaskExecutorRule 4 android.arch.core.executor.TaskExecutor androidx.arch.core.executor.TaskExecutor

Put the directory path and the files's name with extension .xml and .java and .kt in dictionnary to access them in the next step.

dicts={'path1':['file1', 'file2', 'file3', ...],
       path2:[....]
       ...}

if __name__ == "__main__":
    for (root,dirs,files) in os.walk(project_path):
        list_files=[]
        for file in files:
            if file.endswith(tuple(fileExtension)):
                list_files.append(file)
        if len(list_files)>0:
            dicts[root] = list_files

Replace and overwrite the changes with loops

Replace the old packages with the androidx packages in file from our dictionnary using loop, and overwrite the same file with the replaced text so the changes will be saved.

for path in dicts.keys():
    for mFile in dicts[path]:
        # Read in the file
        mFile_path = path+"\\"+mFile
        with open(mFile_path, 'r', encoding="utf8") as file :
            filedata = file.read()
            #iterate over rows in dataframe
            for index, row in df.iterrows():
                # Replace the target string
                filedata = filedata.replace(row['Support Library class'], row['Android X class'])
                
        #overwrite the file with filedata which the replaced text
        with open(mFile_path, 'w', encoding="utf8") as file :
            file.write(filedata)
print("the migration to Androidx done ;)")

the migration to Androidx done ;)