order firestore document by timestamp android code example

Example 1: firestore order number ascending

firestoreDb.collection("ideas").orderBy("number", Query.Direction.ASCENDING)

Example 2: order documents in firestore

// Create Data
const timestamp = firebase.firestore.FieldValue.serverTimestamp;

db.collection('things').add({ ...myData, createdAt: timestamp() })


// Query
db.collection('things').orderBy('createdAt').startAfter(today)