Study: JSON Format, ListView, RecyclerView, HttpURLConnection, CoroutineScope

Create an application to create JSON URL for Contact which have field(id, Name(First Name, Last Name), Phone No, Address)

To Generate JSON Data, Refer: https://app.json-generator.com/

1. Create MainActivity according to below UI design.

2. Use link generated from website for JSON Data

3. Create Class Person with member Variables like id, Name, Phone No, Email Id, Address, Latitude, Longitude. This class should be inherited from Serializable class.

4. Generate JSON data format according to below image.

5. Use RecyclerView or ListView Adapter

6. Add Internet Permission in  Manifest file

7. Create Class HttpRequest for communicating with Web URL

• Code for https://app.json-generator.com/ to generate JSON API

• Generated Link: https://api.json-generator.com/templates/qjeKFdjkXCdK/data

• Generated token: rbn0rerl1k0d3mcwgw7dva2xuwk780z1hxvyvrb1

• JSON Data format

• Person Class should be inherited from Serializable class

• Convert Person Object into Serializable and set to putExtra() method. It will use when user will click on map button in PersonAdapter Class

• get String Data from Intent and convert to Person Object in MapActivity class

• By HttpURLConnection object it is easy to get JSON data from web url in HttpRequest Class

• CoroutineScope() of kotlin is useful to fetch data from URL in background in MainActivity class