MOD for enabling NFC when screen is OFF for stock Android 7.0 SONY devices
These allow to extract the 'source' code of the NfcNci.odex file, in order to be able to modify them later. They can be found here (or build them yourself): https://bitbucket.org/JesusFreke/smali/downloads/
Execute the following commands, to extract the .oat framework files and the .odex file of the NfcNci package:
adb adb pull /system/framework/arm64/
adb pull /system/app/NfcNci/NfcNci.apk
adb pull /system/app/NfcNci/oat/arm64/NfcNci.odex
Let's convert the odex file to modifiable code. Run:
baksmali.jar x -c system/framework/arm64/boot.oat -d system/framework/arm64/ system/app/NfcNci/oat/NfcNci.odex -o NfcNci/
And give it a couple of minutes to end the task
The required modifications can be found here: https://github.com/bamsbamx/NFCScreenOFF/commit/12f21d6cff22eedd80775039beb517723751befd
Run:
smali.jar a -o classes.dex NfcNci/
And copy generated classes.dex into original NfcNci.apk (worked with 7-Zip for me). (OPTIONAL) You can zipalign the APK if you want
Overwrite THE NEW NfcNci.apk into /system/app/NfcNci.apk and chmod 0644 it, then reboot and it will be working
Lasse-it.dk: https://lasse-it.dk/2017/01/how-to-modifying-nfcnci-apk-to-run-when-screen-is-turned-off-on-android-nougat
source.android.com: https://source.android.com/devices/tech/dalvik/dalvik-bytecode
pallergabor.uw.hu: http://pallergabor.uw.hu/androidblog/dalvik_opcodes.html