RecyclerLayour

原创于 2018-07-14 14:50:32 发布 · 144 阅读

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CC 4.0 BY-SA版权

本文介绍了一个使用Android RecyclerView实现的简单示例，包括布局文件定义、Activity中RecyclerView的配置与使用方法、自定义Adapter及其ViewHolder的设计。

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1.activity的布局文件：

2.Activity

public class RecycleActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private List<String> list = new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle);
        //实例view
        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);
        //设置RecyclerView管理器
        //方法一：
        // mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        //方法二：
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
                layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
                mRecyclerView.setLayoutManager(layoutManager);

        //初始化适配器
        RecycleDemoAdapter adapter = new RecycleDemoAdapter(this, list);
        //设置适配器
        mRecyclerView.setAdapter(adapter);
        //实时更新数据
        adapter.update(list);
    }
}

3.adapter的布局文件

4.adapter

public class RecycleDemoAdapter extends RecyclerView .Adapter<RecycleDemoAdapter.MyHolder>{

    Context context;
    List<String> list;

    public  RecycleDemoAdapter(Context context, List<String> list){
        this.context = context;
        this.list = list;
    }

    public void update(List<String> list){
        this.list = list;
        notifyDataSetChanged();
    }

    /*
    这个viewholder是用来初始化控件的
     */
    class MyHolder extends  RecyclerView.ViewHolder{
        TextView textView;

        public MyHolder(View itemView){
            super(itemView);
            textView = itemView.findViewById(R.id.text);
        }
    }

    /*
    创建viewholder ,引入xml传给viewholder
     */
    @Override
    public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
        MyHolder myHolder = new MyHolder(view);
        return myHolder;
    }

    /*
    这里是我们操作item的地方
     */
    @Override
    public void onBindViewHolder(MyHolder holder, int position) {
        String s = list.get(position);
        holder.textView.setText(s);
        //对控件进行监听
        holder.textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });
        //对整个item进行监听
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });
    }

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