[英]How to Retrieve and Render Data from Firebase using ID/Key (with React)?
[英]How to retrieve data from firebase using the key value
您需要使用 equalTo
postsRef.orderByChild("postCategory").equalTo("software engineering").addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String prevChildKey) {
System.out.println(dataSnapshot.getKey());
}
// ...
});
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