RecyclerView封装

通过对RecyclerView的了解，个人认为此控件适用于需要listview与GridView切换的界面以及瀑布流界面。

第一篇主要是listView与Gridview切换代码：

一、先上RecyclerView的通用ViewHolder：

package com.example.recyclerview;import android.graphics.Bitmap;import android.support.v7.widget.RecyclerView;import android.util.SparseArray;import android.view.View;import android.widget.ImageView;import android.widget.TextView;/** * Created by 11981 on 2016/5/30. * RecyclerView通用ViewHolder */public class MyViewHolder extends RecyclerView.ViewHolder {    private SparseArray<View> mViews;    public MyViewHolder(View itemView) {        super(itemView);        mViews= new SparseArray<View>();    }    //通过viewId获取控件    public <T extends View> T getView(int viewId) {        View view = mViews.get(viewId);        if (view == null) {            view = itemView.findViewById(viewId);            mViews.put(viewId, view);        }        return (T) view;    }    /**     * 设置TextView的值     */    public MyViewHolder setText(int viewId,String text){        TextView tv= getView(viewId);        tv.setText(text);        return this;    }    public MyViewHolder setImageResource(int viewId,int resId){        ImageView view= getView(viewId);        view.setImageResource(resId);        return this;    }    public MyViewHolder setImageBitamp(int viewId,Bitmap bitmap){        ImageView view= getView(viewId);        view.setImageBitmap(bitmap);        return this;    }    public MyViewHolder setImageURI(int viewId,String uri){        ImageView view= getView(viewId);//        Imageloader.getInstance().loadImg(view,uri);        return this;    }}

二、然后是适配器：

package com.example.recyclerview;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * Created by 11981 on 2016/5/26. * recyclerview_list_grid适配器 */public abstract class SimpleAdapters extends RecyclerView.Adapter<MyViewHolder> {    private LayoutInflater mInflater;    public List<DataDTO> mDatas;    private int mlayoutId;    public interface OnItemClickListener {        void onItemClick(View view, int position);        void onItemLongClick(View view, int position);    }    private OnItemClickListener onItemClickListener;    public void setOnItemClickListener(OnItemClickListener listener) {        this.onItemClickListener = listener;    }    public SimpleAdapters(Context context, List<DataDTO> datas, int layoutId) {        this.mDatas = datas;        this.mlayoutId = layoutId;        mInflater = LayoutInflater.from(context);    }    @Override    public int getItemCount() {        return mDatas.size();    }    @Override    public void onBindViewHolder(final MyViewHolder holder, final int position) {        convert(holder,mDatas.get(position));        setUpItemEvent(holder);    }    public abstract  void convert(MyViewHolder holder,DataDTO datadto);    public void setUpItemEvent(final MyViewHolder holder) {        if (onItemClickListener != null) {            holder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    //这个获取位置的方法，防止添加删除导致位置不变                    int layoutPosition = holder.getAdapterPosition();                    onItemClickListener.onItemClick(holder.itemView, layoutPosition);                }            });            //longclick            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View v) {                    int layoutPosition = holder.getAdapterPosition();                    onItemClickListener.onItemLongClick(holder.itemView, layoutPosition);                    return false;                }            });        }    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        MyViewHolder viewHolder = new MyViewHolder(mInflater.inflate(mlayoutId, parent, false));        return viewHolder;    }    public void addData(int pos,DataDTO datas) {        mDatas.add(pos, datas);        notifyItemInserted(pos);    }    public void deleteData(int pos) {        mDatas.remove(pos);        notifyItemRemoved(pos);    }}

三、最后是主类：

package com.example.recyclerview;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.StaggeredGridLayoutManager;import android.view.View;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.List;/** * recyclerview_list_grid主类 */public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private RecyclerView mRecyclerView;    private List<DataDTO> mDatas;    private SimpleAdapters mAdapter;    private TextView mlist, mgrid, mhgrid, mstag,madd,mdel;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initDatas();        initViews();        mAdapter=new SimpleAdapters(this, mDatas, R.layout.item_single_view) {            @Override            public void convert(MyViewHolder holder, DataDTO datadto) {                holder.setText(R.id.id_tv,datadto.getAaa()).setImageResource(R.id.id_img,datadto.getBbb());            }        };        mRecyclerView.setAdapter(mAdapter);        //设置recyclerview布局管理器        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);        mRecyclerView.setLayoutManager(linearLayoutManager);        mRecyclerView.setItemAnimator(new DefaultItemAnimator());        mAdapter.setOnItemClickListener(new SimpleAdapters.OnItemClickListener() {            @Override            public void onItemClick(View view, int position) {                Toast.makeText(MainActivity.this,"click:"+position,Toast.LENGTH_SHORT).show();            }            @Override            public void onItemLongClick(View view, int position) {                Toast.makeText(MainActivity.this,"longclick:"+position,Toast.LENGTH_SHORT).show();            }        });        //设置recycler的Item分割线        //listview转gridview没有列的分割       // mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));    }    private void initDatas() {        mDatas = new ArrayList<DataDTO>();        DataDTO data=new DataDTO();        for (int i = 0; i <20 ; i++) {            data.setAaa("aaaaa");            data.setBbb(R.drawable.ic_menu_delete);            mDatas.add(data);        }    }    private void initViews() {        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);        mlist = (TextView) findViewById(R.id.action_listview);        mlist.setOnClickListener(this);        mgrid = (TextView) findViewById(R.id.action_gridview);        mgrid.setOnClickListener(this);        mhgrid = (TextView) findViewById(R.id.action_hor_gridview);        mhgrid.setOnClickListener(this);        mstag = (TextView) findViewById(R.id.action_staggered);        mstag.setOnClickListener(this);        madd=(TextView) findViewById(R.id.action_add);        madd.setOnClickListener(this);        mdel=(TextView) findViewById(R.id.action_delete);        mdel.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.action_listview:                mRecyclerView.setLayoutManager(                        new LinearLayoutManager(this)                );                break;            case R.id.action_gridview:                //二参为列数                mRecyclerView.setLayoutManager(                        new GridLayoutManager(this, 3)                );                break;            case R.id.action_hor_gridview:                //一参为行数                mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager                        (8, StaggeredGridLayoutManager.HORIZONTAL));                break;            case R.id.action_staggered:                Intent intent =new Intent();                startActivity(intent.setClass(this,StaggereGridLayoutActivity.class));                break;            case R.id.action_add:                DataDTO datas = new DataDTO();                datas.setAaa("Insert One");                datas.setBbb(R.drawable.ic_menu_delete);                mAdapter.addData(1,datas);                break;            case R.id.action_delete:                mAdapter.deleteData(1);                break;            default:                break;        }    }}

四、RecyclerView依赖工具类：

package com.example.recyclerview;/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;/** * This class is from the v7 samples of the Android SDK. It's not by me! * <p/> * See the license above for details. * RecyclerView依赖工具类 */public class DividerItemDecoration 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 DividerItemDecoration(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)   {//    Log.v("recyclerview - itemdecoration", "onDraw()");       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);         RecyclerView v = new 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);      }   }}

五、实体类：

package com.example.recyclerview;/** * Created by 11981 on 2016/5/29. * 实体类 */public class DataDTO {    private String aaa;    private int bbb;    public int getBbb() {        return bbb;    }    public void setBbb(int bbb) {        this.bbb = bbb;    }    public String getAaa() {        return aaa;    }    public void setAaa(String aaa) {        this.aaa = aaa;    }}

六、其它的代码：

drawable下：

divider_two.xml:这个是自定义的分割线（listview）

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">    <size android:height="4dp" />    <gradient        android:centerColor="#ff00ff00"        android:endColor="#ffff0000"        android:startColor="#ff0000ff"        android:type="linear"/></shape>

item_bg.xml:点击效果

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">     <item android:state_pressed="true" android:drawable="@color/state_item_pressed"/>     <item android:drawable="@color/state_item_normal"/></selector>

还有一张图片（自行设置）名称：ic_menu_delete.png

Layout下：

主类布局：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.recyclerview.MainActivity">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <TextView            android:id="@+id/action_listview"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="list" />        <TextView            android:id="@+id/action_gridview"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="grid" />        <TextView            android:id="@+id/action_hor_gridview"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="hgrid" />        <TextView            android:id="@+id/action_staggered"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="stag" />        <TextView            android:id="@+id/action_add"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="add" />        <TextView            android:id="@+id/action_delete"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:gravity="center"            android:textSize="25sp"            android:layout_weight="1"            android:text="del" />    </LinearLayout>    <android.support.v7.widget.RecyclerView        android:id="@+id/id_recyclerview"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>

item布局：item_single_view.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:background="@drawable/item_bg"    android:layout_width="match_parent"    android:orientation="vertical"    android:layout_margin="3dp"    android:layout_height="72dp">    <TextView        android:id="@+id/id_tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:text="测试数据"/>    <ImageView        android:id="@+id/id_img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/></LinearLayout>

values下：

color中：

<color name="state_item_pressed">#AAff0000</color><color name="state_item_normal">#44ff0000</color>

<item name="android:windowNoTitle">true</item><item name="android:windowActionBar">false</item><item name="windowActionBar">false</item><item name="windowNoTitle">true</item>

style中；