add instructions to setup the Android development environment

responses/00.01-setup.md

@@ -9,12 +9,26 @@ For simplicity reasons this course will provide you instructions on using the
 terminal and Gradle.
 
 Apart from that you will need an Android phone so that you will be able to install
-the creatd application on your own phone.
+the created application on your own phone.
 
 Now let's cover the pre-requisites.
 
 ## Step 1: Build the project locally
 
+### :keyboard: Activity: Set up your Android development environment
+
+1. Ensure you have Java 1.8 installed (eg. https://adoptopenjdk.net/installation.html)
+1. Go to the Android Studio page: [https://developer.android.com/studio](https://developer.android.com/studio).
+1. Go to the `Command line tools only` section or search for `sdk-tools-`. There you will find the zips which are around 150MB.
+1. Download the SDK tools for your platform.
+1. Extract and set your `ANDROID_SDK_ROOT` environment variable to the extracted location. Add this environment variable to your `~/.bashrc` or `~/.bash_profile`.
+1. Go to the `$ANDROID_SDK_ROOT/tools/bin/` folder
+1. Run the `sdkmanager` command to accept all unaccepted licenses
+    ```bash
+    ./sdkmanager --licenses
+    ```
+    Just say `y` for all
+
 ### :keyboard: Activity: Clone the repository and build the project
 
 1. Open your terminal