This tutorial uses activeroot file released by famed iPhone and PS3 hacker, geohot. This is a quick and simple method. The activeroot file allowing users to root Galaxy S4 Active directly from their devices.
Disclaimer: Rooting voids the warranty of your device. We and the developer of this rooting procedures shall not be held responsible if any undesirable outcomes may happen to your device. use of this root guide is solely at your own risk!
1. Enable "Unknown sources" on the phone to allow installation of apps from sources other than the Play Store by navigating to Settings >> Security.
2. The activeroot file works only on Samsung Galaxy S4 Active (AT&T) SGH-I537. Verify the model number of the Galaxy S4 Active by navigating to Settings >> About Phone.
Steps to Root Galaxy S4 Active (AT&T) SGH-I537 Running on Android 4.2.2 Jelly Bean Firmware
Step 1: Download the activeroot file (ar.apk) directly from your device.
Step 2: Run the ar.apk file on your device. It should give you a message telling you that you have root.
Step 3: Visit the Google Play Store and install SuperSU.
Note: You MUST download and use SuperSU to manage superuser permissions, nothing else. Only SuperSU currently can circumvent Samsung’s “root blocker” in the kernel.
Step 4: Once the installation process is completed, open the SuperSU app and update binaries.
Step 5 (optional): Donate. Credit goes to geohot for his great work.
Samsung Galaxy S4 Active (AT&T) SGH-I537 running on Android 4.2.2 Jelly Bean firmware is now rooted successfully. You can now install any app that requires root permission. Verify the root status of the device by downloading Root Checker app from Google Play Store.
Note: Many Samsung devices store a flash counter that keeps track of how many times you have flashed custom firmwares to your device. Triangle Away can be used to reset the flash counter to zero.
Thank's to all fellas at XDA who first tried out this rooting technique. This method was originally posted via XDA-Developers original thread.