title: Firestore Query Android WhereEqualTo
body: <p>What I want to do is look up all the documents that "<code>usuarios</code>" equals "<code>amigos</code>".
  The problem is that "<code>amigos</code>" is a list. I want you to bring all the documents of all the Strings(amigos) that you find on that list.
  But I get this error:</p>
  
  <blockquote>
    <p>UNIMPLEMENTED: Unsupported FieldFilter value type: 9</p>
  </blockquote>
  
  <pre><code>CollectionReference collectionReference = db.collection("eventos");
  
  collectionReference.whereEqualTo("usuario", amigos).limit(15).orderBy("hora", Query.Direction.DESCENDING).get().addOnSuccessListener(new OnSuccessListener&lt;QuerySnapshot&gt;() {
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/9iant.png" rel="nofollow noreferrer">enter image description here</a></p>