<android.support.v7.widget.RecyclerView   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:id="@+id/mrecycler"/>  

  RecyclerView mrecycler= (RecyclerView) findViewById(R.id.mrecycler);   mrecycler.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));

public static abstract class Adapter<VH extends ViewHolder> { private final AdapterDataObservable mObservable = new AdapterDataObservable(); public abstract VH onCreateViewHolder(ViewGroup parent, int viewType); public abstract void onBindViewHolder(VH holder, int position); public void onBindViewHolder(VH holder, int position, List<Object> payloads) {   onBindViewHolder(holder, position); } /**  * This method calls {@link #onCreateViewHolder(ViewGroup, int)} to create a new  * {@link ViewHolder} and initializes some private fields to be used by RecyclerView.  *  * @see #onCreateViewHolder(ViewGroup, int)  */ public final VH createViewHolder(ViewGroup parent, int viewType) {   TraceCompat.beginSection(TRACE_CREATE_VIEW_TAG);   final VH holder = onCreateViewHolder(parent, viewType);   holder.mItemViewType = viewType;   TraceCompat.endSection();   return holder; } /**  * This method internally calls {@link #onBindViewHolder(ViewHolder, int)} to update the  * {@link ViewHolder} contents with the item at the given position and also sets up some  * private fields to be used by RecyclerView.  *  * @see #onBindViewHolder(ViewHolder, int)  */ public final void bindViewHolder(VH holder, int position) {   holder.mPosition = position;   if (hasStableIds()) {     holder.mItemId = getItemId(position);   }   holder.setFlags(ViewHolder.FLAG_BOUND,       ViewHolder.FLAG_BOUND | ViewHolder.FLAG_UPDATE | ViewHolder.FLAG_INVALID           | ViewHolder.FLAG_ADAPTER_POSITION_UNKNOWN);   TraceCompat.beginSection(TRACE_BIND_VIEW_TAG);   onBindViewHolder(holder, position, holder.getUnmodifiedPayloads());   holder.clearPayload();   TraceCompat.endSection(); } /**  * Return the view type of the item at <code>position</code> for the purposes  * of view recycling.  *  * <p>The default implementation of this method returns 0, making the assumption of  * a single view type for the adapter. Unlike ListView adapters, types need not  * be contiguous. Consider using id resources to uniquely identify item view types.  *  * @param position position to query  * @return integer value identifying the type of the view needed to represent the item at  *         <code>position</code>. Type codes need not be contiguous.  */ public int getItemViewType(int position) {   return 0; } /**  * Returns the total number of items in the data set hold by the adapter.  *  * @return The total number of items in this adapter.  */ public abstract int getItemCount(); /**  * Called when a view created by this adapter has been attached to a window.  *  * <p>This can be used as a reasonable signal that the view is about to be seen  * by the user. If the adapter previously freed any resources in  * {@link #onViewDetachedFromWindow(RecyclerView.ViewHolder) onViewDetachedFromWindow}  * those resources should be restored here.</p>  *  * @param holder Holder of the view being attached  */ public void onViewAttachedToWindow(VH holder) { } /**  * Called when a view created by this adapter has been detached from its window.  *  * <p>Becoming detached from the window is not necessarily a permanent condition;  * the consumer of an Adapter's views may choose to cache views offscreen while they  * are not visible, attaching an detaching them as appropriate.</p>  *  * @param holder Holder of the view being detached  */ public void onViewDetachedFromWindow(VH holder) { } /**  * Register a new observer to listen for data changes.  *  * <p>The adapter may publish a variety of events describing specific changes.  * Not all adapters may support all change types and some may fall back to a generic  * {@link android.support.v7.widget.RecyclerView.AdapterDataObserver#onChanged()  * "something changed"} event if more specific data is not available.</p>  *  * <p>Components registering observers with an adapter are responsible for  * {@link #unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver)  * unregistering} those observers when finished.</p>  *  * @param observer Observer to register  *  * @see #unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver)  */ public void registerAdapterDataObserver(AdapterDataObserver observer) {   mObservable.registerObserver(observer); } /**  * Unregister an observer currently listening for data changes.  *  * <p>The unregistered observer will no longer receive events about changes  * to the adapter.</p>  *  * @param observer Observer to unregister  *  * @see #registerAdapterDataObserver(RecyclerView.AdapterDataObserver)  */ public void unregisterAdapterDataObserver(AdapterDataObserver observer) {   mObservable.unregisterObserver(observer); } /**  * Called by RecyclerView when it starts observing this Adapter.  * <p>  * Keep in mind that same adapter may be observed by multiple RecyclerViews.  *  * @param recyclerView The RecyclerView instance which started observing this adapter.  * @see #onDetachedFromRecyclerView(RecyclerView)  */ public void onAttachedToRecyclerView(RecyclerView recyclerView) { } /**  * Called by RecyclerView when it stops observing this Adapter.  *  * @param recyclerView The RecyclerView instance which stopped observing this adapter.  * @see #onAttachedToRecyclerView(RecyclerView)  */ public void onDetachedFromRecyclerView(RecyclerView recyclerView) { } /**  * Notify any registered observers that the data set has changed.  */ public final void notifyDataSetChanged() {   mObservable.notifyChanged(); } /**  * Notify any registered observers that the item at <code>position</code> has changed.  * Equivalent to calling <code>notifyItemChanged(position, null);</code>.  *  * <p>This is an item change event, not a structural change event. It indicates that any  * reflection of the data at <code>position</code> is out of date and should be updated.  * The item at <code>position</code> retains the same identity.</p>  *  * @param position Position of the item that has changed  *  * @see #notifyItemRangeChanged(int, int)  */ public final void notifyItemChanged(int position) {   mObservable.notifyItemRangeChanged(position, 1); } /**  * Notify any registered observers that the item reflected at <code>fromPosition</code>  * has been moved to <code>toPosition</code>.  *  * <p>This is a structural change event. Representations of other existing items in the  * data set are still considered up to date and will not be rebound, though their  * positions may be altered.</p>  *  * @param fromPosition Previous position of the item.  * @param toPosition New position of the item.  */ public final void notifyItemMoved(int fromPosition, int toPosition) {   mObservable.notifyItemMoved(fromPosition, toPosition); }}

//根據需求，創建自定義樣式的itemViw @Override public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {   View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item,viewGroup,false);   ViewHolder vh = new ViewHolder(view);   return vh; }

 //將數據與界面進行綁定的操作 @Override public void onBindViewHolder(ViewHolder viewHolder, int position) {   viewHolder.mTextView.setText(datas[position]); }

//獲取數據的數量 @Override public int getItemCount() {   return datas.length; }

 public interface OnItemClickListener {    void ItemClickListener(View view,int postion);    void ItemLongClickListener(View view,int postion);  }

  if(mListener!=null){//如果設置了監聽那么它就不為空，然后回調相應的方法      holder.itemView.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {          int pos = holder.getLayoutPosition();//得到當前點擊item的位置pos          mListener.ItemClickListener(holder.itemView,pos);//把事件交給我們實現的接口那里處理        }      });      holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {        @Override        public boolean onLongClick(View v) {          int pos = holder.getLayoutPosition();//得到當前點擊item的位置pos          mListener.ItemLongClickListener(holder.itemView,pos);//把事件交給我們實現的接口那里處理          return true;        }      });    }

  adapter=new MyRecyclerAdapter(this, list);   mrecycler.setAdapter(adapter);   adapter.setOnclickListener(new MyRecyclerAdapter.OnItemClickListener() {     @Override     public void ItemClickListener(View view, int postion) {       Toast.makeText(MainActivity.this,"點擊了："+postion, Toast.LENGTH_SHORT).show();     }     @Override     public void ItemLongClickListener(View view, int postion) {       list.remove(postion);       adapter.notifyItemRemoved(postion);     }   });