使用recycleview实现瀑布流布局

上一篇有简答的recycleview的实现，这里面只是activity和fruit_item.xml中改动了几行代码

引入jar

compile 'com.android.support:recyclerview-v7:24.1.0'

import android.app.Activity;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.StaggeredGridLayoutManager;import java.util.ArrayList;import java.util.List;import java.util.Random;public class MainActivity extends Activity {    private List<Fruit> fruitList = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initFruits();        RecyclerView recycle= (RecyclerView) findViewById(R.id.recycle);      //  LinearLayoutManager layoutManager=new LinearLayoutManager(this);       // layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);//设置横向          //瀑布流布局

//3是指排列的列数，
StaggeredGridLayoutManager.VERTICAL排列方向
        StaggeredGridLayoutManager layoutManager=new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);        recycle.setLayoutManager(layoutManager);        FruitAdapter adapter=new FruitAdapter(fruitList);        recycle.setAdapter(adapter);    }    private void initFruits() {        for (int i = 0; i < 10; i++) {            Fruit apple = new Fruit(getRandomaLengthName("apple"), R.drawable.apple);            fruitList.add(apple);            Fruit banana = new Fruit(getRandomaLengthName("banana"), R.drawable.banana);            fruitList.add(banana);            Fruit grape = new Fruit(getRandomaLengthName("grape"), R.drawable.grape);            fruitList.add(grape);            Fruit orange = new Fruit(getRandomaLengthName("orange"), R.drawable.orange);            fruitList.add(orange);            Fruit pineapple = new Fruit(getRandomaLengthName("pineapple"), R.drawable.pineapple);            fruitList.add(pineapple);            Fruit watermelon = new Fruit(getRandomaLengthName("watermelon"), R.drawable.watermelon);            fruitList.add(watermelon);        }    }    private String getRandomaLengthName(String name) {        Random random=new Random();        int length=random.nextInt(20)+1;        StringBuilder builder=new StringBuilder();        for(int i=0;i<length;i++){            builder.append(name);        }        return builder.toString();    }}

Fruit.java 实体类

public class Fruit {private String name;    private int imageId;    public Fruit(String names, int apple1) {       name=names;        imageId=apple1;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getImageId() {        return imageId;    }    public void setImageId(int imageid) {        this.imageId = imageid;    }}

FruitAdapter 

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> {    private List<Fruit> mFruitList;    public FruitAdapter(List<Fruit> fruitList) {        mFruitList=fruitList;    }    static class ViewHolder extends RecyclerView.ViewHolder{        ImageView fruitImage;        TextView fruitName;        public ViewHolder(View itemView) {            super(itemView);            fruitImage= (ImageView) itemView.findViewById(R.id.fruitImage);            fruitName= (TextView) itemView.findViewById(R.id.textView);        }    }    @Override    public  ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit_item,parent,false);        ViewHolder holder=new ViewHolder(view);        return holder;    }    @Override    public void onBindViewHolder(FruitAdapter.ViewHolder holder, int position) {        Fruit fruit=mFruitList.get(position);        holder.fruitImage.setImageResource(fruit.getImageId());        holder.fruitName.setText(fruit.getName());        Log.i("lg","lgcount=>"+fruit.getName());    }    @Override    public int getItemCount() {        return mFruitList.size();    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.yh.testrecycle.MainActivity"><android.support.v7.widget.RecyclerView    android:id="@+id/recycle"    android:layout_width="match_parent"    android:layout_height="match_parent"></android.support.v7.widget.RecyclerView></RelativeLayout>

fruit_item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_margin="5dp"    android:orientation="vertical">    <ImageView        android:id="@+id/fruitImage"        android:layout_gravity="center_horizontal"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/textView"        android:layout_gravity="left"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

当实现点击recycleview时，只需要在adapter中添加几行代码即可

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> {    private List<Fruit> mFruitList;    public FruitAdapter(List<Fruit> fruitList) {        mFruitList=fruitList;    }    static class ViewHolder extends RecyclerView.ViewHolder{        View fruitView;        ImageView fruitImage;        TextView fruitName;        public ViewHolder(View itemView) {            super(itemView);            fruitView=itemView;            fruitImage= (ImageView) itemView.findViewById(R.id.fruitImage);            fruitName= (TextView) itemView.findViewById(R.id.textView);        }    }    @Override    public  ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit_item,parent,false);       final  ViewHolder holder=new ViewHolder(view);    holder.fruitView.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            int position=holder.getAdapterPosition();            Fruit fruit=mFruitList.get(position);            Toast.makeText(view.getContext(), "dianji"+fruit.getName(), Toast.LENGTH_SHORT).show();        }    });       /* 这个和上面的点击都可以实现，只是有这个点击事件的情况下，弹出的是下面的toast       ，如果没有写这个点击，也就是只有fruitView点击事件，也会实现图片和文字的点击，       并实现点击效果，也就是点击最外层布局，实现内部中任意控件或者布局的点击事件。       holder.fruitImage.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                int position=holder.getAdapterPosition();                Fruit fruit=mFruitList.get(position);                Toast.makeText(view.getContext(), "fruit=>"+fruit.getName(), Toast.LENGTH_SHORT).show();            }        });*/        return holder;    }    @Override    public void onBindViewHolder(FruitAdapter.ViewHolder holder, int position) {        Fruit fruit=mFruitList.get(position);        holder.fruitImage.setImageResource(fruit.getImageId());        holder.fruitName.setText(fruit.getName());        Log.i("lg","lgcount=>"+fruit.getName());    }    @Override    public int getItemCount() {        return mFruitList.size();    }}