ViewPagerWithRecyclerDemo【RecyclerView+ViewPager实现类似TabLayout+ViewPager效果】

版权声明：本文为HaiyuKing原创文章，转载请注明出处！

前言

使用RecyclerView+ViewPager实现类似TabLayout+ViewPager效果。

效果图

使用步骤

一、项目组织结构图

注意事项：

1、  导入类文件后需要change包名以及重新import R文件路径

2、  Values目录下的文件（strings.xml、dimens.xml、colors.xml等），如果项目中存在，则复制里面的内容，不要整个覆盖

二、导入步骤

（1）在build.gradle中引用recyclerview【版本号和appcompat保持一致】

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.why.project.viewpagerwithrecyclerdemo"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    //RecyclerView
    compile "com.android.support:recyclerview-v7:27.1.1"
}

（2）在项目中实现Recyclerview基本数据展现【顶部选项卡区域】

1、创建Bean类

package com.why.project.viewpagerwithrecyclerdemo.bean;

/**
 * Created by HaiyuKing
 * Used
 */

public class TabItemBean {
    private String tabTitle;
    private String tabUrl;

    public TabItemBean(String tabTitle, String tabUrl){
        this.tabTitle = tabTitle;
        this.tabUrl = tabUrl;
    }

    public String getTabTitle() {
        return tabTitle;
    }

    public void setTabTitle(String tabTitle) {
        this.tabTitle = tabTitle;
    }

    public String getTabUrl() {
        return tabUrl;
    }

    public void setTabUrl(String tabUrl) {
        this.tabUrl = tabUrl;
    }
}

TabItemBean.java

2、创建Adapter以及item的布局文件，同时定义颜色、文字大小值

package com.why.project.viewpagerwithrecyclerdemo.adapter;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.why.project.viewpagerwithrecyclerdemo.R;
import com.why.project.viewpagerwithrecyclerdemo.bean.TabItemBean;

import java.util.ArrayList;

/**
 * Created by HaiyuKing
 * Used
 */

public class TabAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    /**上下文*/
    private Context myContext;
    /**集合*/
    private ArrayList<TabItemBean> listitemList;

    private int selectedPosition = -1;//选中的列表项

    /**
     * 构造函数
     */
    public TabAdapter(Context context, ArrayList<TabItemBean> itemlist) {
        myContext = context;
        listitemList = itemlist;
    }

    /**
     * 获取总的条目数
     */
    @Override
    public int getItemCount() {
        return listitemList.size();
    }

    /**
     * 创建ViewHolder
     */
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(myContext).inflate(R.layout.tab_list_item, parent, false);
        ItemViewHolder itemViewHolder = new ItemViewHolder(view);
        return itemViewHolder;
    }

    /**
     * 声明grid列表项ViewHolder
     */
    static class ItemViewHolder extends RecyclerView.ViewHolder {
        public ItemViewHolder(View view) {
            super(view);

            listItemLayout = (RelativeLayout) view.findViewById(R.id.listitem_layout);
            mTabTitle = (TextView) view.findViewById(R.id.top_title);
            mTabUnderLine = (TextView) view.findViewById(R.id.top_underline);
        }

        RelativeLayout listItemLayout;
        TextView mTabTitle;
        TextView mTabUnderLine;
    }

    /**
     * 将数据绑定至ViewHolder
     */
    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int index) {

        //判断属于列表项
        if (viewHolder instanceof ItemViewHolder) {
            TabItemBean tabItemBean = listitemList.get(index);
            final ItemViewHolder itemViewHold = ((ItemViewHolder) viewHolder);

            itemViewHold.mTabTitle.setText(tabItemBean.getTabTitle());

            //设置下划线的宽度值==文本的宽度值
            itemViewHold.mTabTitle.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
            Log.w("why", "top_title.getMeasuredWidth()="+itemViewHold.mTabTitle.getMeasuredWidth());
            itemViewHold.listItemLayout.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
            Log.w("why", "toptabLayout.getMeasuredWidth()="+itemViewHold.listItemLayout.getMeasuredWidth());
            itemViewHold.mTabUnderLine.setWidth(itemViewHold.mTabTitle.getMeasuredWidth());//手动设置下划线的宽度值

            if(selectedPosition == index){
                itemViewHold.mTabTitle.setTextColor(myContext.getResources().getColor(R.color.tab_text_selected_top));
                itemViewHold.mTabUnderLine.setBackgroundColor(myContext.getResources().getColor(R.color.tab_auto_selected_top));
            }else{
                itemViewHold.mTabTitle.setTextColor(myContext.getResources().getColor(R.color.tab_text_normal_top));
                itemViewHold.mTabUnderLine.setBackgroundColor(myContext.getResources().getColor(R.color.tab_auto_normal_top));
            }

            //如果设置了回调，则设置点击事件
            if (mOnItemClickLitener != null) {
                itemViewHold.listItemLayout.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        int position = itemViewHold.getLayoutPosition();//在增加数据或者减少数据时候，position和index就不一样了
                        mOnItemClickLitener.onItemClick(itemViewHold.listItemLayout, position);
                        setSelected(position);
                    }
                });
            }

        }
    }

    /**更改选中的列表项下标值*/
    public void setSelected(int selected) {
        this.selectedPosition = selected;
        notifyDataSetChanged();
    }

    /**
     * 添加Item--用于动画的展现
     */
    public void addItem(int position, TabItemBean listitemBean) {
        listitemList.add(position, listitemBean);
        notifyItemInserted(position);
    }

    /**
     * 删除Item--用于动画的展现
     */
    public void removeItem(int position) {
        listitemList.remove(position);
        notifyItemRemoved(position);
    }

    /*=====================添加OnItemClickListener回调================================*/
    public interface OnItemClickLitener {
        void onItemClick(View view, int position);
    }

    private OnItemClickLitener mOnItemClickLitener;

    public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {
        this.mOnItemClickLitener = mOnItemClickLitener;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<!-- 带有下划线的顶部选项卡子项的布局文件-->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listitem_layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:paddingTop="@dimen/tab_top_auto_padding"
    android:paddingLeft="@dimen/tab_top_auto_padding"
    android:paddingRight="@dimen/tab_top_auto_padding"
    >
    <!-- 标题 -->
    <TextView
        android:id="@+id/top_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text=""
        android:textSize="@dimen/tab_top_auto_title_size"
        android:textColor="@color/tab_text_normal_top"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />
    <!-- 下划线-->
    <!-- android:background="@color/tab_underline_selected_top" -->
    <TextView
        android:id="@+id/top_underline"
        android:layout_width="match_parent"
        android:layout_height="@dimen/tab_top_auto_height"
        android:background="@color/tab_auto_normal_top"
        android:layout_below="@id/top_title"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="@dimen/tab_top_auto_padding"
        />

</RelativeLayout>

tab_list_item.xml

在colors.xml文件中添加以下代码

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>

    <!-- *********************************顶部选项卡区域********************************* -->
    <!-- 顶部选项卡下划线背景色 -->
    <color name="tab_auto_normal_top">#00ffffff</color>
    <color name="tab_auto_selected_top">#3090d9</color>
    <!-- 顶部选项卡文本颜色 -->
    <color name="tab_text_normal_top">#191919</color>
    <color name="tab_text_selected_top">#3090d9</color>
</resources>

在dimens.xml文件中添加以下代码

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>

    <!-- *********************************顶部选项卡区域********************************* -->
    <!-- 选项卡的内边距 -->
    <dimen name="tab_top_auto_padding">10dp</dimen>
    <!-- 选项卡标题的文字大小 -->
    <dimen name="tab_top_auto_title_size">18sp</dimen>
    <!-- 选项卡标题的下划线高度 -->
    <dimen name="tab_top_auto_height">3dp</dimen>
</resources>

3、在Activity布局文件中引用Recyclerview控件【见下文】

4、在Activity类中初始化recyclerview数据【见下文】

（3）创建需要用到的fragment类和布局文件

（4）引入MyCustomViewPager并参考MyCustomViewPagerAdapter创建viewpager的适配器

package com.why.project.viewpagerwithrecyclerdemo.adapter;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.view.ViewGroup;

import java.util.List;

/**
 * Created by HaiyuKing
 * Used
 */

public class MyTabViewPagerAdapter extends FragmentStatePagerAdapter {

    /**碎片集合*/
    private List<Fragment> fragmentList;

    public MyTabViewPagerAdapter(FragmentManager fm) {
        super(fm);
        // TODO Auto-generated constructor stub
    }

    /**
     * 自定义构造函数：用于传递碎片集合过来
     * 一般都写上*/
    public MyTabViewPagerAdapter(FragmentManager fm,List<Fragment> fragmentList) {
        super(fm);
        this.fragmentList = fragmentList;
    }

    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        return fragmentList.get(arg0);
    }

    @Override
    public int getCount() {
        return fragmentList.size();
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        //viewpager+fragment来回滑动fragment重新加载的简单解决办法：http://blog.csdn.net/qq_28058443/article/details/51519663
        //建议保留，因为首页碎片界面含有6个界面切换，总不能设置setOffscreenPageLimit(6)吧，而且设置个数少的话，销毁后还得重新加载
        //super.destroyItem(container, position, object);
    }
}

MyTabViewPagerAdapter.java

（5）因为Demo中使用到了webview请求网址，所以需要在AndroidManifest.xml中添加权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.why.project.viewpagerwithrecyclerdemo">

    <!-- ======================授权访问网络（HttpUtil）========================== -->
    <!-- 允许程序打开网络套接字 -->
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

三、使用方法

（1）在布局文件中引入RecyclerView和MyCustomViewPager【注意，修改MyCustomViewPage的完整路径】

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- 横向列表 -->
    <android.support.v7.widget.RecyclerView
        android:id="@+id/tab_top_recycler"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <!-- 横分割线 -->
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#e9e9e9" />

    <!-- viewpager区域，配合Fragment使用，且不能滑动 -->
    <com.why.project.viewpagerwithrecyclerdemo.viewpager.MyCustomViewPager
        android:id="@+id/vp_tab"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

</LinearLayout>

（2）在Activity中填充数据，关联RecyclerView和ViewPager

package com.why.project.viewpagerwithrecyclerdemo;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;

import com.why.project.viewpagerwithrecyclerdemo.adapter.MyTabViewPagerAdapter;
import com.why.project.viewpagerwithrecyclerdemo.adapter.TabAdapter;
import com.why.project.viewpagerwithrecyclerdemo.bean.TabItemBean;
import com.why.project.viewpagerwithrecyclerdemo.fragment.WebViewFragment;
import com.why.project.viewpagerwithrecyclerdemo.viewpager.MyCustomViewPager;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = MainActivity.class.getSimpleName();

    //分类列表
    private RecyclerView mTabRecycleView;
    private ArrayList<TabItemBean> mTabItemBeanArrayList;
    private TabAdapter mTabAdapter;

    /**保存的选项卡的下标值*/
    private int savdCheckedIndex = 0;
    /**当前的选项卡的下标值*/
    private int mCurrentIndex = -1;

    //横向滚动的ViewPager
    private MyCustomViewPager mViewPager;
    /**滑屏适配器*/
    private MyTabViewPagerAdapter viewPagerAdapter;
    /**碎片集合*/
    private List<Fragment> fragmentList;
    //碎片界面
    private WebViewFragment mWebViewFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //初始化控件以及设置
        initView();
        //初始化数据
        initData();
        //初始化控件的点击事件
        initEvent();
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.e(TAG,"{onResume}savdCheckedIndex="+savdCheckedIndex);
        //设置保存的或者初始的选项卡标红显示
        setTabsDisplay(savdCheckedIndex);

        mCurrentIndex = -1;//解决按home键后长时间不用，再次打开显示空白的问题
        //设置保存的或者初始的选项卡展现对应的fragment
        setFragmentDisplay(savdCheckedIndex);
    }

    /**
     * 初始化控件
     */
    private void initView() {
        mTabRecycleView = findViewById(R.id.tab_top_recycler);
        mViewPager = (MyCustomViewPager) findViewById(R.id.vp_tab);
    }
    /**
     * 初始化数据
     */
    public void initData() {
        //初始化集合
        mTabItemBeanArrayList = new ArrayList<TabItemBean>();

        mTabItemBeanArrayList.add(new TabItemBean("百度","http://www.baidu.com"));
        mTabItemBeanArrayList.add(new TabItemBean("CSDN","http://blog.csdn.net"));
        mTabItemBeanArrayList.add(new TabItemBean("博客园","http://www.cnblogs.com"));
        mTabItemBeanArrayList.add(new TabItemBean("极客头条","http://geek.csdn.net/mobile"));
        mTabItemBeanArrayList.add(new TabItemBean("优设","http://www.uisdc.com/"));
        mTabItemBeanArrayList.add(new TabItemBean("玩Android","http://www.wanandroid.com/index"));
        mTabItemBeanArrayList.add(new TabItemBean("掘金","https://juejin.im/"));

        //设置布局管理器【表情分类列表】
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
        mTabRecycleView.setLayoutManager(linearLayoutManager);
        //设置适配器
        if(mTabAdapter == null){
            //设置适配器
            mTabAdapter = new TabAdapter(this, mTabItemBeanArrayList);
            mTabRecycleView.setAdapter(mTabAdapter);
            //添加分割线
            //设置添加删除动画
            //调用ListView的setSelected(!ListView.isSelected())方法，这样就能及时刷新布局
            mTabRecycleView.setSelected(true);
        }else{
            mTabAdapter.notifyDataSetChanged();
        }

        //将碎片添加到集合中
        fragmentList = new ArrayList<>();
        for(int i=0;i<mTabItemBeanArrayList.size();i++){
            TabItemBean tabItemBean = mTabItemBeanArrayList.get(i);

            Bundle bundle = new Bundle();
            bundle.putString("param", tabItemBean.getTabUrl());
            fragmentList.add(WebViewFragment.getInstance(WebViewFragment.class,bundle));
        }
        //给ViewPager设置适配器
        viewPagerAdapter = new MyTabViewPagerAdapter(getSupportFragmentManager(),fragmentList);
        mViewPager.setAdapter(viewPagerAdapter);
    }

    /**
     * 初始化点击事件
     * */
    private void initEvent() {
        //列表适配器的点击监听事件
        mTabAdapter.setOnItemClickLitener(new TabAdapter.OnItemClickLitener() {
            @Override
            public void onItemClick(View view, int position) {
                if (mCurrentIndex == position) {
                    return;
                }
                setFragmentDisplay(position);//独立出来，用于OnResume的时候初始化展现相应的Fragment

                savdCheckedIndex = position;
                mCurrentIndex = position;
            }
        });

        //viewpager的滑动事件监听
        mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            /*此方法是页面跳转完后得到调用，arg0是你当前选中的页面的Position（位置编号）。*/
            public void onPageSelected(int arg0) {
                //解决滑动后，无法点击上一个fragment选项卡的问题
                setTabsDisplay(arg0);
                savdCheckedIndex = arg0;
                mCurrentIndex = arg0;
            }

            @Override
            /*
             * 当页面在滑动的时候会调用此方法，在滑动被停止之前，此方法回一直得到调用。其中三个参数的含义分别为：
             * arg0 :当前页面，及你点击滑动的页面
             * arg1:当前页面偏移的百分比
             * arg2:当前页面偏移的像素位置   */
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            /*此方法是在状态改变的时候调用，其中arg0这个参数有三种状态（0，1，2）。
             * arg0==0的时候默示什么都没做
             * arg0 ==1的时候默示正在滑动
             * arg0==2的时候默示滑动完毕了*/
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }
        });
    }

    /**
     * 设置导航栏中选项卡之间的切换
     */
    private void setTabsDisplay(int index){
        if(mTabAdapter != null){
            mTabAdapter.setSelected(index);
            mTabRecycleView.smoothScrollToPosition(index);//平移滑动到指定position
        }
    }

    /**
     * 设置碎片之间的切换
     */
    private void setFragmentDisplay(int index){
        mViewPager.setCurrentItem(index, false);//smoothScroll false表示切换的时候,不经过两个页面的中间页
    }

    /**
     * http://blog.csdn.net/caesardadi/article/details/20382815
     * */
    // 自己记录fragment的位置,防止activity被系统回收时，fragment错乱的问题【按home键返回到桌面一段时间，然后在进程里面重新打开，会发现RadioButton的图片选中状态在第二个，但是文字和背景颜色的选中状态在第一个】
    //onSaveInstanceState()只适合用于保存一些临时性的状态，而onPause()适合用于数据的持久化保存。
    protected void onSaveInstanceState(Bundle outState) {
        //http://www.cnblogs.com/chuanstone/p/4672096.html?utm_source=tuicool&utm_medium=referral
        //总是执行这句代码来调用父类去保存视图层的状态”。其实到这里大家也就明白了，就是因为这句话导致了重影的出现
        super.onSaveInstanceState(outState);
        outState.putInt("selectedCheckedIndex", savdCheckedIndex);
        outState.putInt("mCurrentIndex", mCurrentIndex);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        savdCheckedIndex = savedInstanceState.getInt("selectedCheckedIndex");
        mCurrentIndex = savedInstanceState.getInt("mCurrentIndex");
        super.onRestoreInstanceState(savedInstanceState);
    }

}

混淆配置

无

参考资料

暂时空缺

项目demo下载地址

https://github.com/haiyuKing/ViewPagerWithRecyclerDemo