Brief App Overview

• This is a demo app that uses a Foreground Service to perform long running Wifi Scans and sends this data to an imaginary Api.
  

• The WorkManager was used to schedule these periodic Wifi Scans for RSSI values.
  

• The UI is meant to display the latest queried Received Signal Strength Indicator values, and the corresponding SSID name.
  

Solution Considerations

• MVVM Architecture Pattern
  
• Segregation of the app into the following layers:
  (1) UI Layer - this is where we have views like Activities/Fragments
  (2) Domain Layer - this is where we have ViewModels
  (3) Data Layer - this is where we have our repositories and data sources (WifiManager)
  
• Ability to test the above mentioned layers
  
• Use of WorkManager for scheduling tasks
  

Mechanism for demonstrating the application making requests

• Two approaches have been used:
  (1) The RSSI values are displayed in the MainActivity UI within 15 minutes (this is the min time WorkManager enforces between tasks)
  

  

  (2) Check Logcat statements using the filter: "OkHttpClient". The Json payload for the network request and response are logged.
  

  

Testing Instructions

• In Android Studio, find the "test" folder which exists under "src" directory
  

• Right click this folder and select "Run 'Tests in 'RSSI.app'"
  

• Alternatively run the below command in the Terminal:
  ./gradlew test