title: How to Add/Update/Remove array elements in firebase firestore android using Hashmap? A Store Database
body: <p>I want to make a collection of users, users will have multiple stores as documents, each document have fields like <code>storeName</code>, <code>storeAddress</code> and <code>availableProducts</code>. My question is that how to manage availableProducts array? I know Firestore can't handle arrays, I should use HashMap. My available products may have field like product name, product price etc. I am new in Firebase, how can I manage <code>availableProduct</code> array using java in Android Studio?</p>
  
  <p><a href="https://i.stack.imgur.com/sCgbe.png" rel="noreferrer">FireBase Firestore DataBase Image</a></p>