花式RecyclerView设置，含代码

1. 添加依赖和使用

1. 添加依赖；写布局文件；实例化RecyclerView并且初始化数据；

2. 设置适配器<并定义 item>

2. 设置适配器<并定义 item>

   public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
       private final Context context;
       private final ArrayList<String> datas;
       public MyAdapter(Context context, ArrayList<String> datas) {
           this.context = context;
           this.datas = datas;
       }
       @Override
       public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
           View view = View.inflate(context, R.layout.item_hello, null);
           return new MyViewHolder(view);
       }
       @Override
       public void onBindViewHolder(MyViewHolder holder, int position) {
           holder.tv_text.setText(datas.get(position));
           holder.iv_icon.setBackgroundResource(R.mipmap.ic_launcher);
       }
       @Override
       public int getItemCount() {
           return datas.size();
       }
       class MyViewHolder extends RecyclerView.ViewHolder {
           private TextView tv_text;
           private ImageView iv_icon;
           public MyViewHolder(View itemView) {
               super(itemView);
               tv_text = (TextView) itemView.findViewById(R.id.tv_text);
               iv_icon = (ImageView) itemView.findViewById(R.id.iv_icon);
           }
       }
   }
   

3. 设置适配器：水平方向-竖直方向-网格-瀑布流

3. 设置适配器(重难点)：水平方向-竖直方向-网格-瀑布流；
4. 效果图如下：上层是水平方向；下面是瀑布流；竖直方向跟 ListView 一样；
   

   myAdapter = new MyAdapter(this,datas);
   recyclerview.setAdapter(myAdapter);
   /**
    *  设置布局：
    * 第一个参数：上下文
    * 第二参数：方向
    * 第三个参数：排序低到高还是高到低显示，false是低到高显示
    */
   LinearLayoutManager linearLayoutManager =  new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
   GridLayoutManager gridLayoutManager =  new GridLayoutManager(this, 3,GridLayoutManager.VERTICAL, false);
   StaggeredGridLayoutManager staggeredGridLayoutManager =  new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.HORIZONTAL);
   recyclerview.setLayoutManager(linearLayoutManager);
   

4. 添加分割线

4. 添加分割线
   参照网址：http://blog.csdn.net/lmj623565791/article/details/45059587

   	//设置分割线-分割线需要自定义&还可以自定义分割线的样式
   	//没有提供默认的分割线
   	recyclerview.addItemDecoration(new DividerListItemDecoration(this, DividerListItemDecoration.VERTICAL_LIST));
   	 	 
   	public class DividerListItemDecoration extends RecyclerView.ItemDecoration {
   	    private static final int[] ATTRS = new int[]{
   	            android.R.attr.listDivider
   	    };
   	
   	    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;
   	
   	    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;
   	
   	    private Drawable mDivider;
   	
   	    private int mOrientation;
   	
   	    public DividerListItemDecoration(Context context, int orientation) {
   	        final TypedArray a = context.obtainStyledAttributes(ATTRS);
   	        mDivider = a.getDrawable(0);
   	        a.recycle();
   	        setOrientation(orientation);
   	    }
   	
   	    public void setOrientation(int orientation) {
   	        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
   	            throw new IllegalArgumentException("invalid orientation");
   	        }
   	        mOrientation = orientation;
   	    }
   	
   	    @Override
   	    public void onDraw(Canvas c, RecyclerView parent) {
   
   	        if (mOrientation == VERTICAL_LIST) {
   	            drawVertical(c, parent);
   	        } else {
   	            drawHorizontal(c, parent);
   	        }
   	
   	    }
   	
   	    public void drawVertical(Canvas c, RecyclerView parent) {
   	        final int left = parent.getPaddingLeft();
   	        final int right = parent.getWidth() - parent.getPaddingRight();
   	
   	        final int childCount = parent.getChildCount();
   	        for (int i = 0; i < childCount; i++) {
   	            final View child = parent.getChildAt(i);
   	            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext());
   	            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
   	                    .getLayoutParams();
   	            final int top = child.getBottom() + params.bottomMargin;
   	            final int bottom = top + mDivider.getIntrinsicHeight();
   	            mDivider.setBounds(left, top, right, bottom);
   	            mDivider.draw(c);
   	        }
   	    }
   	
   	    public void drawHorizontal(Canvas c, RecyclerView parent) {
   	        final int top = parent.getPaddingTop();
   	        final int bottom = parent.getHeight() - parent.getPaddingBottom();
   	
   	        final int childCount = parent.getChildCount();
   	        for (int i = 0; i < childCount; i++) {
   	            final View child = parent.getChildAt(i);
   	            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
   	                    .getLayoutParams();
   	            final int left = child.getRight() + params.rightMargin;
   	            final int right = left + mDivider.getIntrinsicHeight();
   	            mDivider.setBounds(left, top, right, bottom);
   	            mDivider.draw(c);
   	        }
   	    }
   	
   	    @Override
   	    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
   	        if (mOrientation == VERTICAL_LIST) {
   	            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
   	        } else {
   	            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
   	        }
   	    }
   	}
   

5. 设置分割线样式

5. 设置分割线样式
   在 tlsxl 样式文件中

   <!-- Base application theme. -->
   <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
       <!-- Customize your theme here. -->
       <item name="colorPrimary">@color/colorPrimary</item>
       <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
       <item name="colorAccent">@color/colorAccent</item>
       <item name="android:listDivider">@drawable/divider_bg</item>
   </style>
   

   <!-- Application theme. -->
   <style name="listDividerTheme" >
       <item name="android:listDivider">@drawable/divider_bg</item>
   </style>
    
   在drawable目录下的divider_bg.xml
   <?xml version="1.0" encoding="utf-8"?>
   <shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="rectangle" >
       <gradient
           android:centerColor="#ff00ff00"
           android:endColor="#ff0000ff"
           android:startColor="#ffff0000"
           android:type="linear" />
       <size android:height="2dp"/>
   </shape>
   

6. 设置item的点击事件

6. 自定义设置item的点击事件或者item中某个控件的点击事件；
   RecyclerView默认是没有点击事件的，需要自定义点击事件

   public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
   
       private final Context context;
       private final ArrayList<String> datas;
   	
       //设置点击某个item的监听
       public interface OnItemClickListener{
            void onItemClick(View view,int position,String content);
       }
   
       private OnItemClickListener onItemClickListener;
       public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
           this.onItemClickListener = onItemClickListener;
       }
       //设置点击某个item的监听
       public interface OnImageViewClickListener{
           void onImageViewClick(View view,int position);
       }
   
       private OnImageViewClickListener onImageViewClickListener;
       /**
        * 设置监听图片
        */
       public void setOnImageViewClickListener(OnImageViewClickListener onImageViewClickListener) {
           this.onImageViewClickListener = onImageViewClickListener;
       }
   
       class MyViewHolder extends RecyclerView.ViewHolder {
   
           private TextView tv_text;
           private ImageView iv_icon;
   
           public MyViewHolder(View itemView) {
               super(itemView);
               tv_text = (TextView) itemView.findViewById(R.id.tv_text);
               iv_icon = (ImageView) itemView.findViewById(R.id.iv_icon);
   
               //设置点击事件
               itemView.setOnClickListener(new View.OnClickListener() {
                   @Override
                   public void onClick(View v) {
                       if(onItemClickListener != null){
                           onItemClickListener.onItemClick(v,getLayoutPosition(),datas.get(getLayoutPosition()));
                       }
                   }
               });
   
               //设置监听
               iv_icon.setOnClickListener(new View.OnClickListener() {
                   @Override
                   public void onClick(View v) {
                       if(onImageViewClickListener != null){
                           onImageViewClickListener.onImageViewClick(v,getLayoutPosition());
                       }
                   }
               });	
           }
       }
   }
    
   //在Activity中使用自定义的点击事件
   //设置点击item的点击事件
   myAdapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
       @Override
       public void onItemClick(View view, int position, String content) {
           Toast.makeText(RecyclerViewActivity.this, "content=="+content+",--position=="+position, Toast.LENGTH_SHORT).show();
       }
   });
   
   //设置点击某张图片的点击事件
   myAdapter.setOnImageViewClickListener(new MyAdapter.OnImageViewClickListener() {
       @Override
       public void onImageViewClick(View view, int position) {
           Toast.makeText(RecyclerViewActivity.this, "position=="+position+",view=="+view.toString(), Toast.LENGTH_SHORT).show();
       }
   });
   

7. 删除和增加数据

7. 删除和增加数据

   1. 在适配器中新增加添加和删除两个方法

      public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
          /**
           * 添加数据
           */
          public void addData(int position,String content){
              datas.add(position,content);
              notifyItemInserted(position);
          }
          /**
           * 移除数据
           */
          public void removeData(int position){
              datas.remove(position);
              notifyItemRemoved(position);
          }
      }
      

   2. 在布局文件中添加点击按钮：添加、移除、List、Grid

   3. 点击事件

      private void setLitener() {
          btn_add.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  myAdapter.addData(0,"Content NetData");
                  //定位到第0个位置
                  recyclerview.scrollToPosition(0);
              }
          });
      
          btn_remove.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  myAdapter.removeData(0);
              }
          });
      
          btn_grid.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  GridLayoutManager gridLayoutManager =  new GridLayoutManager(RecyclerViewActivity.this, 2,GridLayoutManager.VERTICAL, false);
                  recyclerview.setLayoutManager(gridLayoutManager);
              }
          });
      
          btn_list.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  LinearLayoutManager linearLayoutManager =  new LinearLayoutManager(RecyclerViewActivity.this, LinearLayoutManager.VERTICAL, false);
                  recyclerview.setLayoutManager(linearLayoutManager);
              }
          });
      }
      

8. 设置删除和增加的动画

8. 设置删除某条和增加某条的动画

   //设置动画
   recyclerview.setItemAnimator(new DefaultItemAnimator());
   

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