I downloaded APK file from Google Play, and want to know if the develop of the application have used React Native library. What\'s a quick and stable way to do that? (Would be e
The accepted solution certainly will get you the right answer, but it will be quite slow. It is what I did originally, and it was not fast enough for my needs since I was running this script across hundreds of APKs. I developed an alternate solution and executed it before the original made it through 5% of the APKs.
The reason I don't like checking for layouts having com_facebook in the name (the other pre-existing solution) is that it is entirely plausible for an app to be using another Facebook SDK that contains a layout file starting with that string. I don't know of any false positives, but it seemed reasonably likely that there would be some.
Instead I check for the presence of libreactnativejni.so
which I have to imagine only gets used if React Native is being used. (I originally was looking for libyoga.so, but I had a few false positives, I think because there's a logging library by the same name.)
Specifically, this condition on a Mac in a bash script is what I'm using (I think it's portable, but have not tested):
if [ "$(unzip -l $apkfile | grep libreactnativejni.so | wc -l)" -gt "0" ]
then
echo "Uses RN"
fi
I can offer you 2 solutions:
You can use dex2jar.
When you open the generated jar file, you can check if it uses React Native if there is a folder /com/facebook/react/
.
Solution 2
app.apk
into app.zip
dexdump
from AndroidSDK
$ANDROID_HOME/build-tools//dexdump:
dexdump classes.dex`com/facebook/react
in the output of dexdumpNot sure if this proven way.
Download the apk from the store to your PC, I used APK Downloader FireFox extension (if you don't have the app apk already).
Open apk with Zip software (I am on Linux so I used Ark). Now you can see parts of the project.
Go to res->layout
and search for com_facebook...
, In my case it was com_facebook_activity_layout.xml
.
If you have one layout with com_facebook
in it then this apk was created with React.