How to get value of some field in firebase firestore android?

Question

Like upper question, i want to get value of some field in firebase firestore instead of all document with DocumentSnapshot

like this in SQL SE

Answer 1

try this code:

//set a global variable
dataList: Array;


const dataCollection = firebase.firestore().collection('data');
dataCollection.get(query => {
query.forEach(docs => {
this.dataList.push({id: doc.id, data:doc.data()});
  })
})