Once No-SQL (Dynamo) is integrated in your Mobile Hub project, update your awsconfiguration.json and implemented data models, which are mapped objects, proceed to make a CRUD.
As DynamoDB calls are synchronous and they don't belong to the main UI Thread of the Activity, then all operations directed to your Dynamo Tables gotta be inside an asynchronous method like Runnable
Runnable runnable = new Runnable() {