recycleView的使用

• recycleView常用的几种样式布局：

* LinearLayoutManager 线性布局管理器      （ListView效果）
* GridLayoutManager    网格布局管理器    （GridView效果）
* StaggeredGridLayoutManager  瀑布流管理器

• 关于recycleview 的使用方法

首先自定义一个recycleViewAdapter 如下：

package com.example.think.adapter;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.example.think.myapplication.R;

import java.util.ArrayList;

/**
* Created by HuangMei on 2016/8/3.
*/
public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.ViewHolder>{

    Context context;
    ArrayList<String> arrayList = new ArrayList<>();

    public RecycleViewAdapter(Context context, ArrayList<String> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = View.inflate(context, R.layout.recycler_item, null);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.textView.setText(arrayList.get(position));

        //以下几行是为瀑布流设置高度使用的（备注：如果不是瀑布流的时候不需要添加）
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,100+(int) (Math.random() * 50));
        holder.imageView.setLayoutParams(lp);
    }

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

    class ViewHolder extends RecyclerView.ViewHolder{
        TextView textView;
        ImageView imageView;

        public ViewHolder(View itemView) {
            super(itemView);

            textView = (TextView) itemView.findViewById(R.id.textView);
            imageView = (ImageView) itemView.findViewById(R.id.imageView);
        }
    }
}

然后在自己的活动里面调用自己的自定义适配器

public class MainActivity extends Activity {

    ArrayList<String> arrayList = new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recylcer = (RecyclerView) findViewById(R.id.recyclerView);

        //ListView效果的 LinearLayoutManager
//        LinearLayoutManager mgr = new LinearLayoutManager(this); //备注：listview样式和九宫格样式公用
//        //VERTICAL纵向，类似ListView，HORIZONTA 横向，类似Gallery 
//        mgr.setOrientation(LinearLayoutManager.HORIZONTAL);//备注：也可以是VERTICAL

        //GridLayout 3列
//        GridLayoutManager mgr=new GridLayoutManager(this,3);

        StaggeredGridLayoutManager mgr = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);

        recylcer.setLayoutManager(mgr);
        //设置适配器
        recylcer.setAdapter(new RecycleViewAdapter(this, setData(10)));
    }

    ArrayList<String> setData(int n){
        for(int i = 0; i < n; i ++){
            arrayList.add(i + "" + i + "" + i + "" + i + "" + i);
        }
        return arrayList;
    }
}