This video elaborate how to call REST API in android using RETROFIT. complete step and process with complete idea is mentioned here.
What is API and introduction on API
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• API in android studio | What is an A...
Download the source code here :
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https://drive.google.com/file/d/1uXJz...
Required Dependencies
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implementation 'com.squareup.retrofit2:retrofit:2.1.0'
implementation 'com.squareup.retrofit2:converter-gson:2.1.0'