Android 创建查询以获取等于当前用户id的值

我想从键“group_member”中获取当前用户id的所有匹配值。关键的“组成员”由用户id组成。数据库屏幕截图：

为此，我创建了query

query query=mGroupDatabase.child（“组成员”）.equalTo（mCurrent\u用户id）

但是没有得到任何结果。
之后，该结果需要显示在RecyclerView中

mGroupList = (RecyclerView) mMainView.findViewById(R.id.group_list);

        mAuth = FirebaseAuth.getInstance();
        mCurrent_user_id = mAuth.getCurrentUser().getUid();

        mGroupDatabase = FirebaseDatabase.getInstance().getReference().child("Groups");
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        linearLayoutManager.setReverseLayout(true);
        linearLayoutManager.setStackFromEnd(true);

        mGroupList.setHasFixedSize(true);
        mGroupList.setLayoutManager(linearLayoutManager);

        Query query = mGroupDatabase.child("group_member").equalTo(mCurrent_user_id);
        query.keepSynced(true);

        FirebaseRecyclerOptions<Group> options =
                new FirebaseRecyclerOptions.Builder<Group>()
                        .setQuery(query, Group.class)
                        .build();

        firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Group, ViewHolder>(options) {
            @Override
            public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                // Create a new instance of the ViewHolder, in this case we are using a custom
                // layout called R.layout.message for each item
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.adapter_users_activity_layout, parent, false);

                return new ViewHolder(view);
            }

            @Override
            protected void onBindViewHolder(final ViewHolder viewHolder, int position, final Group group) {

                Log.d("sdfdfgghhjhj", group.getGroup_member());

@Override
    public void onStart() {
        super.onStart();
        firebaseRecyclerAdapter.startListening();
    }

    @Override
    public void onStop() {
        super.onStop();

        if (firebaseRecyclerAdapter != null) {
            firebaseRecyclerAdapter.stopListening();
        }
    }

要解决此问题，请更改以下代码行：

Query query = mGroupDatabase.child("group_member").equalTo(mCurrent_user_id);

到

是否已开始侦听更改？是的，@Override public void onStart（）{super.onStart（）；firebaseRecyclerAdapter.startListening（）；}日志名
sdfdfgghjhj
？很好，听起来不是随机的：）请确保不要向用户显示此内容
Query query = mGroupDatabase.child("group_member").equalTo(mCurrent_user_id);

Query query = mGroupDatabase.orderByChild("group_member").equalTo(mCurrent_user_id);