Android 新控制項RecyclerView

Android 新控制項RecyclerView

RecyclerView 是 android-support-v7-21 版本中新增的一個 Widgets。我們可以使用RecyclerView非常簡單的實現橫向豎向的ListView.GridView.以及瀑布流的效果.先看一下項目的實現的效果

是不是很炫？使用RecyclerView可以非常簡單的實現.<喎?http://www.bkjia.com/kf/ware/vc/" target="_blank" class="keylink">vcD4NCjxwPlJlY3ljbGVyVmlldyDM2NDUPGJyIC8+DQoxLrK7udjQxEl0ZW3Kx7fxz9TKvtTa1f3It7XEzrvWw9LUvLDI57rOz9TKvjxiciAvPg0KMi6yu7nY0MRpdGVt1q685Mjnus631rjuPGJyIC8+DQozLrK7udjXokl0ZW3U9rzT0+vJvrP9tcS2r7ut0Ke5+zxiciAvPg0KNC7L/L32vfbWu8rHudjXosjnus672MrVus24tNPDaXRlbTxiciAvPg0KzPmz9rK/t9a0+sLro7o8L3A+DQo8cHJlIGNsYXNzPQ=="brush:java;"> mRecyclerView = (RecyclerView) findViewById(R.id.rv); //設定它的Adapter myRecyclerViewListAdapater = new MyRecyclerViewListAdapater(this,sourceDatas); mRecyclerView.setAdapter(myRecyclerViewListAdapater); //設定它的LayoutManage ， 通過 LayoutManager去設定它的顯示方式 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false); mRecyclerView.setLayoutManager(linearLayoutManager); //設定分割線// dividerItemDecoration = new DividerItemDecoration(this,LinearLayoutManager.VERTICAL);// mRecyclerView.addItemDecoration(dividerItemDecoration); //設定增加刪除Item的動畫 mRecyclerView.setItemAnimator(new DefaultItemAnimator()); myRecyclerViewListAdapater.setOnItemClickListener(new MyRecyclerViewListAdapater.OnItemClickListener() { @Override public void onItemClickListener(View view, int position) { Toast.makeText(MainActivity.this,click : + position,Toast.LENGTH_SHORT).show(); } @Override public boolean onLongItemClickListener(View view, int position) { myRecyclerViewListAdapater.deleteItem(position); return false; } });

Adapter代碼

public class MyRecyclerViewListAdapater extends RecyclerView.Adapter {    private Context context;    protected List sourceDatas;    private LayoutInflater layoutInflater;    public OnItemClickListener mOnItemClickListener;    public MyRecyclerViewListAdapater(Context context,List sourceDatas){        this.context = context;        this.sourceDatas = sourceDatas;        layoutInflater = LayoutInflater.from(context);    }    @Override    public MyRecyclerViewListAdapater.MyListHolder onCreateViewHolder(ViewGroup viewGroup, int i) {        View view = layoutInflater.inflate(R.layout.item,viewGroup,false);        MyListHolder myListHolder = new MyListHolder(view);        return myListHolder;    }    @Override    public void onBindViewHolder(final MyListHolder viewHolder, final int i) {        viewHolder.textView.setText(sourceDatas.get(i));        itemClick(viewHolder);    }    /**     * ItemView點擊事件     */    protected void itemClick(final MyListHolder viewHolder){        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if(null != mOnItemClickListener){                    int postion = viewHolder.getLayoutPosition();                    mOnItemClickListener.onItemClickListener(viewHolder.itemView,postion);                }            }        });        viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {            @Override            public boolean onLongClick(View v) {                if(null != mOnItemClickListener){                    int position = viewHolder.getLayoutPosition();                    return mOnItemClickListener.onLongItemClickListener(viewHolder.itemView,position);                }                return false;            }        });    }    /**     * 方法返回item的數量     * */    @Override    public int getItemCount() {        return sourceDatas.size();    }    /**     * 添加item     */    public void addItem(int position){        sourceDatas.add(position,Add Item);        notifyItemInserted(position);    }    /**     * 刪除Item     */    public void deleteItem(int positon){        sourceDatas.remove(positon);        notifyItemRemoved(positon);    }    /**     * 設定item點擊介面     */    public void setOnItemClickListener(OnItemClickListener onItemClickListener){        this.mOnItemClickListener = onItemClickListener;    }    /**     * Recycler本身並沒有給我們提供ItemClick事件，這裡需要我們自己實現這個介面     * 點擊介面     * */    public interface OnItemClickListener{        //點擊事件        public void onItemClickListener(View view,int position);        //長按事件        public boolean onLongItemClickListener(View view,int position);    }    class MyListHolder extends RecyclerView.ViewHolder{        TextView textView;        //繼承 RecyclerView.ViewHolder 必須要實現它的構造方法        //可以看到在它的構造方法接收到一個View的參數，這個View就是我們建立的ItemView        public MyListHolder(View itemView) {            super(itemView);            textView = (TextView) itemView.findViewById(R.id.tv_list_item);        }    }}

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