RecyclerView瀑布流

其中大部分内容实现其实是和上篇文章是一样的，就不多叙述了，就一个地方不同，就是我们在适配器中绑定ViewHolder的方法中需要重新给我们的itemView布局设置height，我这里是生成随机数来设置高度的，代码实现为：

MainActivity.java：

publicclassMainActivityextendsAppCompatActivity {privateRecyclerView mRecyclerView;privateList

lists;privateMyRecyclerAdapter adapter;

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initData();

mRecyclerView= (RecyclerView)this.findViewById(R.id.recyclerView);

mRecyclerView.setItemAnimator(newDefaultItemAnimator());//mRecyclerView.addItemDecoration();//设置分割线mRecyclerView.setLayoutManager(newStaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));//设置RecyclerView布局管理器为2列垂直排布adapter =newMyRecyclerAdapter(this,lists);

mRecyclerView.setAdapter(adapter);

adapter.setOnClickListener(newMyRecyclerAdapter.OnItemClickListener() {

@OverridepublicvoidItemClickListener(View view,intpostion) {

Toast.makeText(MainActivity.this,"点击了："+postion,Toast.LENGTH_SHORT).show();

}

@OverridepublicvoidItemLongClickListener(View view,intpostion) {//长按删除lists.remove(postion);

adapter.notifyItemRemoved(postion);

}

});

}privatevoidinitData() {

lists=newArrayList();for(inti = 0; i < 100; i++) {

lists.add("" +i);

}

}

}

MyRecyclerAdapter.java：：

publicclassMyRecyclerAdapterextendsRecyclerView.Adapter

{privateListlists;privateContext context;privateListheights;privateOnItemClickListener mListener;publicMyRecyclerAdapter(Context context,Listlists) {this.context =context;this.lists =lists;

getRandomHeight(this.lists);

}privatevoidgetRandomHeight(List

lists){//得到随机item的高度heights =newArrayList<>();for(inti = 0; i < lists.size(); i++) {

heights.add((int)(200+Math.random()*400));

}

}publicinterfaceOnItemClickListener{voidItemClickListener(View view,intpostion);voidItemLongClickListener(View view,intpostion);

}publicvoidsetOnClickListener(OnItemClickListener listener){this.mListener =listener;

}

@OverridepublicMyViewHolder onCreateViewHolder(ViewGroup parent,intviewType) {

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

MyViewHolder viewHolder=newMyViewHolder(view);returnviewHolder;

}

@OverridepublicvoidonBindViewHolder(finalMyViewHolder holder,intposition) {

ViewGroup.LayoutParams params=  holder.itemView.getLayoutParams();//得到item的LayoutParams布局参数params.height = heights.get(position);//把随机的高度赋予item布局holder.itemView.setLayoutParams(params);//把params设置给item布局holder.mTv.setText(lists.get(position));//为控件绑定数据if(mListener!=null){//如果设置了监听那么它就不为空，然后回调相应的方法holder.itemView.setOnClickListener(newView.OnClickListener() {

@OverridepublicvoidonClick(View v) {intpos = holder.getLayoutPosition();//得到当前点击item的位置posmListener.ItemClickListener(holder.itemView,pos);//把事件交给我们实现的接口那里处理}

});

holder.itemView.setOnLongClickListener(newView.OnLongClickListener() {

@OverridepublicbooleanonLongClick(View v) {intpos = holder.getLayoutPosition();//得到当前点击item的位置posmListener.ItemLongClickListener(holder.itemView,pos);//把事件交给我们实现的接口那里处理returntrue;

}

});

}

}

@OverridepublicintgetItemCount() {returnlists.size();

}

}classMyViewHolderextendsRecyclerView.ViewHolder{

TextView mTv;publicMyViewHolder(View itemView) {super(itemView);

mTv=(TextView) itemView.findViewById(R.id.textView);

}

}