Programming languages: Java and/or Kotlin
Having two JSON:
rooms.json (https://api.myjson.com/bins/1eyhi8)
person.json (https://api.myjson.com/bins/19b2z4)
Every item in rooms.json describes its center coordinates (lat, lon), radius and security access level (integer values 0, 1, 2, ... ).
Object in person.json describes a person's name, position (i.e. "engineer" or “assistant” etc), url of profile picture and personal security access level (integer values 0, 1, 2, ... ).
Also there is a condition of unstable internet connection, which means both JSONs should be somehow persisted into local device storage (e.g. as DB records). If connection is present, the app should fetch JSONs from the web, otherwise fetch data from the local storage.
The app’s objectives:
-
To display person profile info (picture, name, position, access level)
-
To detect whether the person is in radius of the restricted room.
isRestricted = person.level < room.level -
If in radius then display alert warning (e.g. Toast or Snackbar)
Given rectangular area where longitudinal axis is parallel to the equator, and its center coordinates (Latc, Lonc), width (W) and length (L) are known.
- Latc = 1.180054
- Lonc = 103.417785
- W = 80 meters
- L = 240 meters
You need to place a set of inscribed circles (R = W/2) and register each of them as a fence area.
Hint:
Use the quick and dirty estimate that
111,111 meters (111.111 km) in the Y direction is 1 degree (of latitude)
and
111,111 * cos(latitude) meters in the X direction is 1 degree (of longitude)
The app’s goal:
- If device/person is not inside any circle fence area (e.g. completely out of rectangular area) then display alert warning (e.g. Toast or Snackbar).
Hint:
You can use one of
- Geofencing [https://developer.android.com/training/location/geofencing]
- Awareness [https://developers.google.com/awareness/android-api/fence-register
- or any other API of your choice.
Both com.google.android.geo.API_KEY and com.google.android.awareness.API_KEY in Manifest are registered and activated, so you do not need to create your own keys.
Create an NDK module that is able to turn GPS on/off. You are allowed to use any library/tool of own choice (either native like libhardware, or 3-party like https://gist.github.com/kanru/1568934). On UI, there should be a button by which the user can interact with the NDK module to turn GPS on/off.
App should consist of 2 screens (Activities or Fragments - up to your choice), one screen for Task 1 and one screen for Task 2. The button for the Task 3 may be placed on any screen.
Happy coding!