Rooting detection is a cat and mouse game and it is hard to make rooting detection that will work on all devices for all cases.
See Android Root Beer https://github.com/scottyab/rootbeer for advanced root detection which also uses JNI and native CPP code compiled into .so native library.
If you need some simple and basic rooting detection check the code below:
/**
* Checks if the device is rooted.
*
* @return <code>true</code> if the device is rooted, <code>false</code> otherwise.
*/
public static boolean isRooted() {
// get from build info
String buildTags = android.os.Build.TAGS;
if (buildTags != null && buildTags.contains("test-keys")) {
return true;
}
// check if /system/app/Superuser.apk is present
try {
File file = new File("/system/app/Superuser.apk");
if (file.exists()) {
return true;
}
} catch (Exception e1) {
// ignore
}
// try executing commands
return canExecuteCommand("/system/xbin/which su")
|| canExecuteCommand("/system/bin/which su") || canExecuteCommand("which su");
}
// executes a command on the system
private static boolean canExecuteCommand(String command) {
boolean executedSuccesfully;
try {
Runtime.getRuntime().exec(command);
executedSuccesfully = true;
} catch (Exception e) {
executedSuccesfully = false;
}
return executedSuccesfully;
}
Probably not always correct. Tested on ~10 devices in 2014.
