RecyclerView 实现瀑布流及点击事件，含点击回调的接口

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> {
private List<Fruit> mFruitList;

/**
*自定义内部类，构造传入条目view
*/
static class ViewHolder extends RecyclerView.ViewHolder{
ImageView fruitImage;
TextView fruitName;
View fruitView;

public ViewHolder(View itemView) {
super(itemView);
fruitView=itemView;
fruitImage= (ImageView) itemView.findViewById(R.id.fruit_image);
fruitName= (TextView) itemView.findViewById(R.id.fruit_name);
}
}

//Adapter的构造传入数组
public FruitAdapter(List<Fruit> mFruitList) {
this.mFruitList = mFruitList;
}

//传入布局，绑定布局
@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();

4000
Fruit fruit=mFruitList.get(position);
Toast.makeText(view.getContext(),"你想吃"+fruit.getName()+"的水果",Toast.LENGTH_SHORT).show();
}
});

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(),"你想吃图片的"+fruit.getName(),Toast.LENGTH_SHORT).show();
}
});

return holder;
}

//绑定数据
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Fruit fruit=mFruitList.get(position);
holder.fruitImage.setImageResource(fruit.getImageId());
holder.fruitName.setText(fruit.getName());
}

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private Button button;
private ProgressBar pb_test;
private RecyclerView recycler_view;
private List<Fruit> fruitList=new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruits();//初始化数组
initView();
}

private void initView() {
button = (Button) findViewById(R.id.button);
button.setOnClickListener(this);
pb_test = (ProgressBar) findViewById(R.id.pb_test);

recycler_view = (RecyclerView) findViewById(R.id.recycler_view);

//LinearLayoutManager layoutManager=new LinearLayoutManager(this);
//layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL); //横向滚动  GridLayoutManager  StaggeredGridLayoutManager 瀑布流
StaggeredGridLayoutManager layoutManager=new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);
recycler_view.setLayoutManager(layoutManager);
FruitAdapter adapter=new FruitAdapter(fruitList);
recycler_view.setAdapter(adapter);
//recycler_view.setOnClickListener(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:

break;
}
}

private void initFruits() {
for (int i = 0; i < 2; i++) {
Fruit apple = new Fruit(getRandomLengthName("Apple"), R.drawable.apple_pic);
fruitList.add(apple);
Fruit banana = new Fruit(getRandomLengthName("Banana"), R.drawable.banana_pic);
fruitList.add(banana);
Fruit orange = new Fruit(getRandomLengthName("Orange"), R.drawable.orange_pic);
fruitList.add(orange);
Fruit watermelon = new Fruit(getRandomLengthName("Watermelon"), R.drawable.watermelon_pic);
fruitList.add(watermelon);
Fruit pear = new Fruit(getRandomLengthName("Pear"), R.drawable.pear_pic);
fruitList.add(pear);
Fruit grape = new Fruit(getRandomLengthName("Grape"), R.drawable.grape_pic);
fruitList.add(grape);
Fruit pineapple = new Fruit(getRandomLengthName("Pineapple"), R.drawable.pineapple_pic);
fruitList.add(pineapple);
Fruit strawberry = new Fruit(getRandomLengthName("Strawberry"), R.drawable.strawberry_pic);
fruitList.add(strawberry);
Fruit cherry = new Fruit(getRandomLengthName("Cherry"), R.drawable.cherry_pic);
fruitList.add(cherry);
Fruit mango = new Fruit(getRandomLengthName("Mango"), R.drawable.mango_pic);
fruitList.add(mango);
}
}

private String getRandomLengthName(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();
}
}

public class Fruit {

private String name;

private int imageId;

public Fruit(String name, int imageId) {
this.name = name;
this.imageId = imageId;
}

public String getName() {
return name;
}

public int getImageId() {
return imageId;
}

}