如何从Firebase Android获取所有子列表

Question

我想要Android中Firebase的所有子列表。

我已经实现了此代码，但无法正常工作。

mFirebaseRef = new Firebase(FIREBASE_URL);

mFirebaseRef.addValueEventListener(new ValueEventListener() {

    @Override

    public void onDataChange(DataSnapshot dataSnapshot) {

        List<String> td = (ArrayList<String>) dataSnapshot.getValue();

        //notifyDataSetChanged();

    }

    @Override

    public void onCancelled(FirebaseError firebaseError) {

    }

});

Answer 1

FirebaseDatabase mFirebaseDatabase = FirebaseDatabase.getInstance();&nbsp;DatabaseReference databaseReference =&nbsp; &nbsp; mFirebaseDatabase.getReference(FIREBASE_URL);&nbsp; &nbsp; &nbsp; &nbsp; databaseReference.addValueEventListener(new ValueEventListener() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void onDataChange(DataSnapshot dataSnapshot) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for (DataSnapshot childDataSnapshot : dataSnapshot.getChildren()) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Log.v(TAG,""+ childDataSnapshot.getKey()); //displays the key for the node&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Log.v(TAG,""+ childDataSnapshot.child(--ENTER THE KEY NAME eg. firstname or email etc.--).getValue());&nbsp; &nbsp;//gives the value for given keyname&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; public void onCancelled(DatabaseError databaseError) {&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; });希望能帮助到你！