在 firebase 上插入数据

 DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
 mDatabase.child("tasks").push().setValue(firebaseData, new DatabaseReference.CompletionListener() {
        @Override
        public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
            //Problem with saving the data
            if (databaseError != null) {

            } else {
                //Data uploaded successfully on the server

               }

            }
    });