Android decompile

fast

jadx myflir-bv2.3.6-release-signed.apk

verbose

yay apktool
yay jd-cmd

adb shell pm path com.flir.tiger
adb pull /system/app/myflir-bv2.3.6-release-signed/myflir-bv2.3.6-release-signed.apk

wget https://github.com/DexPatcher/dex2jar/releases/download/v2.1-20190905-lanchon/dex-tools-2.1-20190905-lanchon.zip
unzip dex-tools-2.1-20190905-lanchon.zip

apktool decode --no-src myflir-bv2.3.6-release-signed.apk
cd dex-tools-2.1-20190905-lanchon
./d2j-jar2dex.sh ../myflir-bv2.3.6-release-signed/classes.dex -o ../myflir-bv2.3.6-release-signed/src.jar
./d2j-jar2dex.sh ../myflir-bv2.3.6-release-signed/classes2.dex -o ../myflir-bv2.3.6-release-signed/src2.jar