[Iska]

Ну, например, так:

Скрытый текст

Код:

@echo off
setlocal enableextensions enabledelayedexpansion

for /f "usebackq delims=" %%i in (`2^>nul dir /b /a:d "*.apk"`) do ren "%%~fi" "%%~ni."
for /f "usebackq delims=" %%i in (`2^>nul dir /b /a:d "*.jar"`) do ren "%%~fi" "%%~nxi.out"

endlocal
exit /b 0