NanoDroid/doc/DeodexServices.md

# Deodex services.jar

Here you can find instructions on how to manually deodex `services.jar` as preparation for Signature Spoofing support.

If you want to check beforehand (or afterwards), if your ROM supports Signature Spoofing, use this [tool](https://f-droid.org/de/packages/lanchon.sigspoof.checker/).

## Pre-Check

If your `/system/framework/services.jar` file contains the file `classes.dex`, you can skip deodexing and start patching right-away, else following these instructions.

## Android 9.0 Pie

Android 9.0 is currently not supported by smali/baksmali (more precisely O/DEX format 039 and OAT format changes are not yet implemented).

VdexExtractor will create CompatDex for Android 9.0 (more precisely VDEX 019 files) instead of DEX. Theese CDEX files can only be manually converted to DEX on a GNU/Linux or MacOS PC, see [this instructions](https://github.com/anestisb/vdexExtractor#compact-dex-converter).

## VDEX

If you can see `/system/framework/oat/[arch]/services.vdex`, where [arch] is the device architecture (arm, arm64, x86 or x86_64), you should follow theese instructions.

the instructions are basically simple, though plenty commands:

* connect phone with PC while in TWRP, mount `/system` **read-write**
* get latest `vdexExtractor`
  * [vdexExtractor Sources](https://github.com/anestisb/vdexExtractor)
* zip/unzip utilities for commandline (or some UI tool)
* common sense on using commandline (or some UI tool instead)

```
adb pull /system/framework framework
cp framework/services.jar services.jar-backup
```

now deodex `services.vdex`:

```
vdexExtractor -i framework/oat/[arch]/services.vdex --ignore-crc-error
```

this will create the following file:
* framework/oat/[arch]/services.apk_classes.dex

if it's properly been created rename it to classes.dex and add it to `services.jar`, if there are additional files like services.apk_classes2.dex, rename them to classes2.dex and so on and add them to services.jar like:

```
mv framework/oat/[arch]/services.apk_classes.dex classes.dex
... mv for other dex files ...
zip -j framework/services.jar classes*.dex
```

next install the new `services.jar` to device:

```
adb push framework/services.jar /system/framework
adb shell
chmod 0644 /system/framework/services.jar
chown root:root /system/framework/services.jar
```

unmount `/system` and flash the NanoDroid-Patcher.

If something goes wrong you still have the unpatched `services.jar`, as we created a copy named `services.jar-backup`.

## ODEX

If you can see `/system/framework/oat/[arch]/services.odex`, where [arch] is the device architecture (arm, arm64, x86 or x86_64), you should follow theese instructions.

the instructions are basically simple, though plenty commands:

* connect phone with PC while in TWRP, mount `/system` **read-write**
* get latest `baksmali.jar` and `smali.jar`
  * [smali Sources](https://github.com/JesusFreke/smali)
* zip/unzip utilities for commandline (or some UI tool)
* common sense on using commandline (or some UI tool instead)

```
adb pull /system/framework framework
cp framework/services.jar services.jar-backup
```

```
java -jar baksmali.jar x framework/oat/[arch]/services.odex -d framework/[arch] -d framework/ -o services-new
java -jar smali.jar a services-new -o classes.dex
```

somestimes baksmali.jar can't find the bootclasses file itself, in this case pass it manually using `-b`, for example:

`-b framework/[arch]/boot.oat`

in any case, if a new classes.dex was successfully created in the services-new directory, re-package it into the services.jar we previously pulled:

```
zip -j framework/services.jar classes*.dex
```

next install the new `services.jar` to device:

```
adb push framework/services.jar /system/framework
adb shell
chmod 0644 /system/framework/services.jar
chown root:root /system/framework/services.jar
```

unmount `/system` and flash the NanoDroid-Patcher.

If something goes wrong you still have the unpatched `services.jar`, as we created a copy named `services.jar-backup`.