add doc

README.md

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+# Android env scripts
+
+Scripts to manage android stuff.
+
+## Setup
+
+First make sure you have the right env variable set. Copy the variable of [android_env](./android_env) in `~/.bashrc` and edit to your liking. The first time, you need to refresh your environment with `source ~/.bashrc`.
+
+## Install 
+
+If you havent already installed Android `sdkmanager` and the basic packages, run [`install_android.sh`](./install_android.sh)
+
+## Create emulator
+
+To create emulators, you can use [`make_emulators.sh`](./make_emulators.sh). Edit the variables in the script to your liking.
+
+## Run emulators (headless)
+
+The first time an emulator boot, it will make a snapshot post boot to accelerate futures boots. For some reason some time the first boot hang in an headless setup, [`./emulator_first_boot.sh`](./emulator_first_boot.sh) may help with the first boot.
+
+To start the emulators normally, use [`start_emulators.sh`](./start_emulators.sh)
+
+## Stop emulators
+
+To stop all emulators, run [`kill_all_emulators.sh`](./kill_all_emulators.sh)
+
+## Delete emulators
+
+To delete emulators, run [`delate_emulators.sh`](./delate_emulators.sh)

kill_all_emulators.sh

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+#!/usr/bin/bash
+
+for e in $(adb devices | grep emulator | sed 's/\t.*//'); do adb -s $e emu kill; done