安卓 类微信开发(二)

目录

一、主要内容

二、核心代码

三、效果展示

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在UI的基础上: 安卓 类微信界面开发(一)_qingsongxyz的博客-CSDN博客

一、主要内容

对聊天主界面chatFragement进行完善，使用RecyclerView实现滚动列表，使用

SwipeRefreshLayout实现下拉刷新，以及简单了点击弹出消息框。

二、核心代码

编写RecyclerView滚动列表中的行样式文件layout_chat_item.xml:

布局效果:

编写ChatAdapter.class继承自RecyclerView.Adapter:

public class ChatAdapter extends RecyclerView.Adapter {

    private Context context;

    private List> data;

    public ChatAdapter(Context context, List> data) {
        this.context = context;
        this.data = data;
    }

    @NonNull
    @Override
    public ChatViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new ChatViewHolder(LayoutInflater.from(context).inflate(R.layout.layout_chat_item, parent, false));
    }

    @Override
    public void onBindViewHolder(@NonNull ChatViewHolder holder, int position) {
        holder.textView1.setText(data.get(position).get("name").toString());
        holder.textView2.setText(data.get(position).get("message").toString());
        holder.textView3.setText(data.get(position).get("time").toString());
        holder.imageView.setImageResource(Integer.parseInt(data.get(position).get("avatars").toString()));
        holder.linearLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ImageView avatars = view.findViewById(R.id.layout_chat_item_imageView);
                TextView name = view.findViewById(R.id.layout_chat_item_textView1);
                TextView message = view.findViewById(R.id.layout_chat_item_textView2);
                TextView time = view.findViewById(R.id.layout_chat_item_textView3);
                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setIcon(avatars.getDrawable());
                builder.setTitle(name.getText() + ":");
                builder.setMessage("Date:" + time.getText() + "\n" + message.getText());
                builder.setPositiveButton("我知道了",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {

                            }
                        });
                AlertDialog dialog = builder.create();
                dialog.show();
            }
        });
    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    public class ChatViewHolder extends RecyclerView.ViewHolder {

        TextView textView1, textView2, textView3;

        ImageView imageView;

        LinearLayout linearLayout;

        public ChatViewHolder(@NonNull View itemView) {
            super(itemView);
            textView1 = itemView.findViewById(R.id.layout_chat_item_textView1);
            textView2 = itemView.findViewById(R.id.layout_chat_item_textView2);
            textView3 = itemView.findViewById(R.id.layout_chat_item_textView3);
            imageView = itemView.findViewById(R.id.layout_chat_item_imageView);
            linearLayout = itemView.findViewById(R.id.layout_chat_item1);
        }
    }
}

修改ChatFragment.class:

public class ChatFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {

    private View view;
    private RecyclerView fragment_chat_recyclerView;
    private SwipeRefreshLayout swipeRefreshLayout;
    private ChatAdapter chatAdapter;
    private Context context;
    private List> chatData = new ArrayList<>();

    public ChatFragment(Context context) {
        this.context = context;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        view = inflater.inflate(R.layout.fragment_chat, container, false);

        fragment_chat_recyclerView = view.findViewById(R.id.fragment_chat_recyclerView);
        swipeRefreshLayout = view.findViewById(R.id.fragment_chat_swipeRefreshLayout);

        initData();
        configSwipeRefreshLayout();

        chatAdapter = new ChatAdapter(context, chatData);
        LinearLayoutManager manager = new LinearLayoutManager(context);
        manager.setOrientation(RecyclerView.VERTICAL);
        fragment_chat_recyclerView.setLayoutManager(manager);
        fragment_chat_recyclerView.setAdapter(chatAdapter);
        return view;
    }

    private void configSwipeRefreshLayout() {
        swipeRefreshLayout.setSize(CircularProgressDrawable.LARGE);
        swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_bright,
                android.R.color.system_accent1_200, android.R.color.system_neutral2_300);
        swipeRefreshLayout.setOnRefreshListener(this);
    }

    private void initData() {
        String[] name = {"倚楼听风雨", "璎婲", "の大脸猫", "静秋┐", ">.<",
                         "旧街凉风", "初見", "雨嘉ψ", "鸢尾*", "凉栀"};
        String[] message = {"在吗?", "哈哈哈", "...", "呜呜呜", "呵呵",
                            "吃饭了吗?", "~~~", "今天有空吗？", "出去玩呀", "爱你哟"};
        String[] time = {"12:10", "昨天", "3月15日", "3月15日", "3月15日",
                         "9:00", "5:00", "4月17日", "18:00", "9月1日"};
        Integer[] avatars = {R.drawable.avatars1, R.drawable.avatars2, R.drawable.avatars3,
                            R.drawable.avatars4, R.drawable.avatars5, R.drawable.avatars6,
                            R.drawable.avatars7, R.drawable.avatars8, R.drawable.avatars9,
                            R.drawable.avatars10,};

        for (int i = 0; i < name.length; i++) {
            HashMap d = new HashMap<>();
            d.put("name", name[i]);
            d.put("message", message[i]);
            d.put("time", time[i]);
            d.put("avatars", avatars[i]);
            chatData.add(d);
        }
    }

    @Override
    public void onRefresh() {
        //延时2s
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                swipeRefreshLayout.setRefreshing(false);
            }
        }, 3000);
    }
}

三、效果展示

 项目源码Gitee:青松xyz/WechatForm