1 public class ChattingActivity extends AppCompatActivity {
 2 
 3     private ActivityChattingBinding binding;
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.activity_chatting);
 8         binding = ActivityChattingBinding.inflate(getLayoutInflater());
 9         setContentView(binding.getRoot());
10         TextView title = findViewById(R.id.title);
11         Intent intent = getIntent();
12         String str_title = intent.getStringExtra("title");
13         title.setText(str_title);
14     }

 1     private void initRecyclerView() {
 2         mCollectRecyclerView=binding.chatRecyclerView;
 3         mCollectRecyclerAdapter = new myAdapter(getActivity(), chatEntities);
 4         //给RecyclerView设置adapter
 5         mCollectRecyclerView.setAdapter(mCollectRecyclerAdapter);
 6         //设置layoutManager,可以设置显示效果，是线性布局、grid布局，还是瀑布流布局
 7         //参数是：上下文、列表方向（横向还是纵向）、是否倒叙
 8         mCollectRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
 9         //设置item的分割线
10         mCollectRecyclerView.addItemDecoration(new DividerItemDecoration(getActivity(),DividerItemDecoration.VERTICAL));
11         //RecyclerView中没有item的监听事件，需要自己在适配器中写一个监听事件的接口。参数根据自定义
12         mCollectRecyclerAdapter.setOnItemClickListener(new myAdapter.OnItemClickListener() {
13             @Override
14             public void OnItemClick(View view, ChatEntity data) {
15                 //此处进行监听事件的业务处理
16                 Toast.makeText(getActivity(),"你点击了我的消息",Toast.LENGTH_SHORT).show();
17                 Intent intent=new Intent();
18                 String title = data.getChatName();
19                 intent.putExtra("title",title);
20                 intent.setClass(getActivity(), ChattingActivity.class);
21                 getActivity().startActivity(intent);
22             }
23         });
24     }