RecyclerView的简单配置

最新推荐文章于 2024-07-11 00:48:06 发布

原创最新推荐文章于 2024-07-11 00:48:06 发布 · 518 阅读

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CC 4.0 BY-SA版权

本文介绍了如何在Android中配置和使用RecyclerView，包括导入必要的依赖，设置wedget包，以及编写核心代码实现列表展示。

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1.导入依赖

2.wedget包

3.编写代码

package view.bw.com.recyclerview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecycler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initText();
    }


    private void initView() {
        mRecycler = (RecyclerView) findViewById(R.id.recycler);
    }


    private void initText() {
        mRecycler.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
        mRecycler.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        mRecycler.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.HORIZONTAL));
        MyAdpter adapter = new MyAdpter(this);
        mRecycler.setAdapter(adapter);
    }
}

MyAdpter

package view.bw.com.recyclerview;

import android.content.Context;
import android.graphics.Color;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

/**
 * Created by lenovo on 2018/1/4.
 */

public class MyAdpter extends RecyclerView.Adapter<MyAdpter.ViewHolder> {
    private Context context;
    //定义一个数组存放高度
    List<Integer> list = new ArrayList<Integer>();


    public MyAdpter(Context context) {
        this.context = context;
        for (int i = 0;i<30;i++){
            int height = new Random().nextInt(200) + 100;
            list.add(height);
        }
    }

    @Override
    public MyAdpter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(context).inflate(R.layout.item,parent,false);
        ViewHolder holder = new ViewHolder(view);


        return holder;
    }

    @Override
    public void onBindViewHolder(MyAdpter.ViewHolder holder, int position) {

        //绑定
        ViewGroup.LayoutParams params = holder.itemView.getLayoutParams();
        //动态设置它的高度
        params.height = list.get(position);
        //保存view的高度
        holder.itemView.setLayoutParams(params);
        if (position%3==0){
            holder.itemView.setBackgroundColor(Color.BLUE);
        }else {
            holder.itemView.setBackgroundColor(Color.CYAN);
        }
        holder.recycler.setText("我是一只小小鸟，想要飞呀飞，而且能飞很高。");


    }




    @Override
    public int getItemCount() {
        return 30;
    }

    class ViewHolder extends RecyclerView.ViewHolder{


        private TextView recycler;

        public ViewHolder(View itemView) {
            super(itemView);
            recycler = itemView.findViewById(R.id.tt);
        }
    }


}