apk2aab-tool

Put all tool files in one folder

Open your command prompt in current directory

Decompile the apk through apktool.jar

java -jar apktool_2.5.0.jar d test.apk -s -o decompile_apk -f

Compile the resources using aapt2

aapt2.exe compile --dir decompile_apk\res -o res.zip

After that you will see a res.zip will generate in your current directory

Execute below command in command line

aapt2.exe link --proto-format -o base.zip -I android.jar --manifest decompile_apk\AndroidManifest.xml --min-sdk-version $version --target-sdk-version $version --version-code $version --version-name $version -R res.zip --auto-add-overlay

$version should be replace with your apk version for example my apk have min-sdk is 7 , target-sdk is 30 , version-code is 1 , verison-name is 1.0 . So my command will be ->

aapt2.exe link --proto-format -o base.zip -I android.jar --manifest decompile_apk\AndroidManifest.xml --min-sdk-version 7 --target-sdk-version 30 --version-code 1 --version-name 1.0 -R res.zip --auto-add-overlay

After that you will see a base.zip will generate in your current directory

Directory structure:

base/
/AndroidManifest.xml
/res
/resources.pb

Take base folder as your main folder for now !

Create a folder manifest name folder inside base folder and move your base/AndroidManifest.xml to manifest/AndroidManifest.xml

Copy whole assets folder from decompile_apk/assets and paste to base/assets

Copy lib folder from decompile_apk/lib and paste to base/lib

Copy all files inside unknown folder from decompile_apk/unknown and paste to base/root

Copy whole kotlin folder from decompile_apk/kotlin and paste to base/root/kotlin

Final directory structure

base/
/assets
/dex
/lib
/manifest
/res
/root
/resources.pb

Open your command prompt in /base directory

We are going to create a zip using cmd or you can use any software like Winrar & 7zip

Execute below command in command line

jar cMf base.zip manifest dex res root lib assets resources.pb

It will create base.zip in current directory now copy the base.zip and paste where you put all tool file (.jars , .exe)

Open your command prompt in /tools directory

Execute below command in command line

java -jar bundletool.jar build-bundle --modules=base.zip --output=base.aab

base.aab file will generate in current folder

You need to sign the generated aab file with your keystore in order to publish the application in play store