Instead of calling the start.sh script, if you're using Shizuku, you can use its API directly from your app:

IShizukuApplication service = Shizuku.getBinder();
// then call methods

But your command seems to be manually starting Shizuku’s service from ADB — which might be for debugging or fixing Shizuku.

What makes this command profound is that it treats ADB not as a debugging tool, but as a runtime permission broker. Shizuku essentially turns adb shell into a service that any app can borrow.

This is powerful but fragile:

You could use ProcessBuilder to execute the same shell command:

ProcessBuilder pb = new ProcessBuilder(
    "sh", "/storage/emulated/0/android/data/moe.shizuku.privileged.api/start.sh", "upd"
);
pb.directory(new File("/storage/emulated/0"));
Process process = pb.start();

But note:
Without root or Shizuku permissions, your app cannot execute scripts in another app's data directory.

Now that we understand the command, we must understand the purpose. Shizuku is an open-source application that allows apps to use system-level Android APIs (Application Programming Interfaces) with ADB privileges, without root access.

Let’s slice this command into digestible parts.