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Android 7.0已经出了，感觉自己还在以前的技术上徘徊，上班就越来越懒，用到了才会去查，需要学的还有很多。
Android 5.0 提供了RecyclerView和cardView 两个 新的控件。

recycleView 简单实用 鸿洋真大神

实现一个简单地图片切换 Grallery 效果

效果图

Paste_Image.png

以前listview的写法：
![Upload Paste_Image.png failed. Please try again.]

1. RecyclerView

基本写法：
 public class GalleryAdapter extends  
    RecyclerView.Adapter<GalleryAdapter.ViewHolder>  
 {  
    private LayoutInflater mInflater;  
    private List<Integer> mDatas;  

public GalleryAdapter(Context context, List<Integer> datats)  
{  
    mInflater = LayoutInflater.from(context);  
    mDatas = datats;  
}  

public static class ViewHolder extends RecyclerView.ViewHolder  
{  
    public ViewHolder(View arg0)  
    {  
        super(arg0);  
    }  

    ImageView mImg;  
    TextView mTxt;  
}  

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

/** 
 * 创建ViewHolder 
 */  
@Override  
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)  
{  
    View view = mInflater.inflate(R.layout.activity_index_gallery_item,  
            viewGroup, false);  
    ViewHolder viewHolder = new ViewHolder(view);  

    viewHolder.mTxt= (TextView) view  
            .findViewById(R.id.id_index_gallery_item_text);  
    viewHolder.mImg = (ImageView) view  
            .findViewById(R.id.id_index_gallery_item_image);  
    return viewHolder;  
}  
/** 
 * 设置值 
 */  
@Override  
public void onBindViewHolder(final ViewHolder viewHolder, final int i)  
{  
    viewHolder.mImg.setImageResource(mDatas.get(i));  
    viewHolder.mTxt.setText("XXXX");  
}  

代码中：

//得到控件  
    mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview_horizontal);  
    //设置布局管理器  
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);  
    linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);  
    mRecyclerView.setLayoutManager(linearLayoutManager);  
    //设置适配器  
    mAdapter = new GalleryAdapter(this, mDatas);  
    mRecyclerView.setAdapter(mAdapter);  

RecycleView需要自己去实现点击事件： 采用adapter去回调

     public interface OnItemClickLitener {   
          void onItemClick(View view, int position);   
          void onItemLongClick(View view, int position);
     }
     private OnItemClickLitener mOnItemClickLitener;
     public void setOnItemClickListener(OnItemClickLitener mOnItemClickLitener)    
     {                   
        this.mOnItemClickLitener = mOnItemClickLitener;
     }

在onBindViewHolder中实现点击单个事件。

    @Overridepublic void onBindViewHolder(ViewHolder holder, int position) {      
          holder.mCusName.setText("小王");    
         if (mOnItemClickLitener != null) {   
             holder.itemView.setOnClickListener(new View.OnClickListener() {    
             @Override       
             public void onClick(View view) {        
                  int pos = holder.getLayoutPosition();             
                  mOnItemClickLitener.onItemClick(holder.itemView, pos);      
               } 
             });  
             holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {        
                  @Override      
                 public boolean onLongClick(View view) {         
                      int pos = holder.getLayoutPosition();            
                      mOnItemClickLitener.onItemLongClick(holder.itemView, pos);         
                      return false;     
                 } 
              });
           }
       }

Activity中adapter中实现单个点击事件：

  mAdapter.setOnItemClickLitener(new OnItemClickLitener() {
    @Override public void onItemClick(View view, int position) {   
          Toast.makeText(HomeActivity.this, position + " click", Toast.LENGTH_SHORT).show(); 
      } 
   @Override public void onItemLongClick(View view, int position) { 
           Toast.makeText(HomeActivity.this, position + " long click", Toast.LENGTH_SHORT).show(); mAdapter.removeData(position); 
      } 
   });

2.CardView

布局类似FrameLayout，但是加了很多特效：卡片的边框、阴影，duang，很酷、很炫。

基本写法：  
 <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:orientation="horizontal"
card_view:cardBackgroundColor="@color/cardview_dark_background"
card_view:cardCornerRadius="5dp" >

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:padding="5dp" >

    <ImageView
        android:id="@+id/pic"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerInParent="true"
        android:scaleType="centerCrop" />

    <TextView
        android:clickable="true"
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="10dp"
        android:layout_marginRight="10dp"
        android:gravity="right|bottom"
        android:textColor="@android:color/white"
        android:textSize="24sp" />
</RelativeLayout>
</android.support.v7.widget.CardView>

card_view:cardBackgroundColor="@color/cardview_dark_background" card_view:cardCornerRadius="5dp"
注意要使用card_view命名空间
设置CardView的背景颜色和外围的圆角大小

3.结合使用实现：
知乎类的 界面:

Paste_Image.png

参考学习： 超级棒

http://www.mamicode.com/info-detail-841663.html