Shizuku

Shizuku is optional. Android lets only system apps end another app. Shizuku runs a small helper with adb’s permissions, which is allowed to end apps. ES-DE Overlay uses it when it’s running and allowed:

• Quit Game ends the game with nothing else on screen. Without Shizuku, it opens the game’s App Info page in Settings for a moment and presses Force stop.
• Quit games left with Home (off by default, needs Shizuku) ends the game’s app when you leave it with Home, as Quit Game would.
  • Progress since your last save is lost, and the game starts fresh next time.
  • In exchange, ES-DE’s next launch of a different RetroArch game works the first time.
  • It covers every game ES-DE launched, emulators and Android games alike, except ES-DE Overlay and Shizuku themselves.
• Themes from ES-DE’s theme downloader can be read, so the overlay takes their look (see Theme).

Set it up

1. Install one of them:
   • Shizuku, from Google Play or its GitHub releases. Without root, it has to be started again after every restart.
   • Shizuku-Next, from its GitHub releases. It’s a fork that can start itself on boot and restart itself if it stops. It’s signed with a different key, so uninstall Shizuku first. This is the one in the setup the screenshots come from.
2. Start it, by one of the ways in Shizuku’s guide:
   • Wireless debugging (needs Wi-Fi):
     1. In Android’s developer options, turn on USB debugging and Wireless debugging.
     2. In Shizuku, start pairing.
     3. Tap Pair device with pairing code under Wireless debugging, and type the code into Shizuku’s notification.
     4. Tap Start in Shizuku.
   • From a computer: with USB debugging on and the device plugged in, run adb shell sh /sdcard/Android/data/moe.shizuku.privileged.api/start.sh.
   • On a rooted device, start it directly.
3. Shizuku-Next only: turn on Start on boot, and Watchdog to have it restart itself. If it was started through wireless debugging, that needs Wi-Fi at boot; see below for starting without it.
4. In ES-DE Overlay, look under Quitting games.
   • The Shizuku row reads Not installed, Not running (Open Shizuku opens it), Not allowed or Enabled.
   • Tap Allow and allow ES-DE Overlay in Shizuku’s dialog; the row turns Enabled.
   • Then turn on Quit games left with Home if you want it. The switch can’t be turned on while Shizuku isn’t Enabled.

Advanced: start Shizuku-Next without Wi-Fi

Some firmware lets adb listen on a network port from every boot. Shizuku-Next’s USB start method can then use that port, with no Wi-Fi and no computer.

• This works on the Retroid Pocket Nova. Many phones refuse the setting; stock Samsung firmware does.
• It leaves adb listening on port 5555 on every network the device joins. A connection still needs a computer key you’ve allowed, but undo it if that matters to you.

1. With USB debugging on and the device plugged into a computer, run adb shell setprop persist.adb.tcp.port 5555, then adb shell getprop persist.adb.tcp.port. It should print 5555; if it prints nothing, the firmware doesn’t allow it.
2. In Shizuku-Next, choose the USB start method, turn on Start on boot, Watchdog and TCP mode, and start it. Allow the Allow USB debugging? prompt for Shizuku’s key.
3. Restart to check. Shizuku-Next should be running a few seconds after boot, with Wi-Fi on or off.

To undo it, run adb shell setprop persist.adb.tcp.port "" and restart.