设置聊天消息的顺序

通过在聊天UI中设置排序规则来实现。例如，以下代码将聊天消息按时间顺序排序：

public class ChatActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private List<Message> mMessages;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_chat);

        // 初始化 RecyclerView 和 Adapter
        mRecyclerView = findViewById(R.id.recyclerView);
        mAdapter = new MessageAdapter(mMessages);

        // 设置 RecyclerView 排序规则为按时间顺序排序
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this, RecyclerView.VERTICAL, false));
        mRecyclerView.setAdapter(mAdapter);
        mAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
            @Override
            public void onItemRangeInserted(int positionStart, int itemCount) {
                mRecyclerView.scrollToPosition(mAdapter.getItemCount() - 1);
            }
        });
    }
}