用recylerView实现瀑布流的效果

recylerView是v7包中一个新组件，它具有item回收复用的功能，用户只要实现自己的ViewHolder就可以了,该组件会自动帮你回收复用每一个item

废话不多说，直接上代码

布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v7.widget.RecyclerView
android:id="@+id/id_recyclerview"
android:divider="#ffff0000"
android:dividerHeight="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>

</RelativeLayout>

代码部分：

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

// 设置布局管理器 垂直布局
// id_recyclerview.setLayoutManager(new LinearLayoutManager(this));
//cardView
// id_recyclerview.setLayoutManager(new GridLayoutManager(this,5));
//瀑布流
id_recyclerview.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
id_recyclerview.setItemAnimator(new DefaultItemAnimator());
//创建adapter对象
MyAdapter myAdapter = new MyAdapter();
id_recyclerview.setAdapter(myAdapter);
myAdapter.setOnItemClickLitener(new OnItemClickLitener() {
@Override
public void onItemClick(View view, int position) {
Toast.makeText(MainActivity.this,"1111", Toast.LENGTH_LONG).show();
}

@Override
public void onItemLongClick(View view, int position) {

}
});

Adaper部分：

@Override
public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
MyViewHolder myViewHolder = new MyViewHolder(LayoutInflater.from(MainActivity.this).inflate(R.layout.item_recyclerview,viewGroup,false));

return myViewHolder;
}

@Override
public void onBindViewHolder(MyViewHolder myViewHolder, final int i) {
//得到一个随机数用于设置控件高度
Random random = new Random();
int ranHeight = (random.nextInt(10)+5)*15;
ViewGroup.LayoutParams linearLayout = ll_randler.getLayoutParams();
linearLayout.height = ranHeight;
ll_randler.setLayoutParams(linearLayout);
myViewHolder.tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(onItemClickLitener != null){
onItemClickLitener.onItemClick(v,i);
}

}
});
}

@Override
public int getItemCount() {
return arrayList.size();
}
class  MyViewHolder extends RecyclerView.ViewHolder{
ImageView tv;

//将ViewHolder中的内容写在里面，自动复用
public MyViewHolder(View itemView) {
super(itemView);
tv = (ImageView) itemView.findViewById(R.id.text);
ll_randler = (LinearLayout) itemView.findViewById(R.id.ll_randler);
}

}
}