keys.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>
  <!-- Get the AccuWeather API key from: https://developer.accuweather.com -->
  <string name="accu_weather_api_key">ACCU_WEATHER_API_KEY</string>

  <!-- Get the AirNow API key from: https://docs.airnowapi.org -->
  <string name="air_now_api_key">AIR_NOW_API_KEY</string>

  <!-- Get the Withings API keys from: https://developer.withings.com/oauth2/ -->
  <!-- Consider using: https://colab.research.google.com/drive/1bkU7T5uv368nTQLN66TosILYCmIq0L6F -->
  <string name="withings_client_id">WITHINGS_CLIENT_ID</string>
  <string name="withings_client_secret">WITHINGS_CLIENT_SECRET</string>
  <string name="withings_refresh_token">WITHINGS_REFRESH_TOKEN</string>

  <!-- Get the Google Maps Directions API key from: https://developers.google.com/maps/documentation/directions/ -->
  <string name="google_maps_directions_api_key">GOOGLE_MAPS_DIRECTIONS_API_KEY</string>
</resources>