Device Owner over Wi-Fi

Turn on Device Owner for a screen that already runs Marien Player, without a cable or a reset. New device? Use Lock it down instead.

1. Install adb on your computer: brew install --cask android-platform-tools
2. Connect to the device (same Wi-Fi):

   adb connect <device-ip>:5555
   

   If that fails (Android 11+): on the device, Developer options → Wireless debugging → Pair device with pairing code, then run adb pair <ip>:<port> with that code, and adb connect to the address on the main Wireless debugging screen. Android 10 or older needs a USB cable once: adb tcpip 5555, then unplug.
3. Remove every account on the device (Settings → Accounts). Check with:

   adb shell dumpsys account | grep "Account {"
   

4. Grant Device Owner and restart the app:

   adb shell dpm set-device-owner \
     com.fortu.player/com.fortu.player.kiosk.DeviceAdminReceiver
   adb shell am force-stop com.fortu.player
   adb shell monkey -p com.fortu.player -c android.intent.category.LAUNCHER 1
   

5. Check: open diagnostics (hold the top-left corner) and look for device owner (full kiosk).

Note

Device Owner can only be removed with a factory reset.