SwipeRefresh

基于原生的SwipeRefreshLayout 做了封装处理

Gradle:

compile 'com.hsy:refreshlibrary:1.0'

Maven :

<dependency>
  <groupId>com.hsy</groupId>
  <artifactId>refreshlibrary</artifactId>
  <version>1.0</version>
  <type>pom</type>
</dependency>

此项目中包括四种：

• 1.原生SwipeRefreshLayout（上拉可通过滚动监听实现）

• 2.自定义支持上拉刷新的组件

• 3.自定义支持ViewPage的刷新组件VPSwipeRefreshLayout

• 4.RecyclerView+SwpieRefreshLayout实现下拉刷新效果

---

1.原生SwipeRefreshLayout（上拉可通过滚动监听实现）

SwipeRefrshLayout是Google官方更新的一个Widget,可以实现下拉刷新的效果。该控件集成自ViewGroup在support-v4兼容包下，不过我们需要升级supportlibrary的版本到19.1以上。

除了OnRefreshListener接口外，SwipRefreshLayout中还有一些其他重要的方法，具体如下：

         1、setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener):设置手势滑动监听器。
         
         2、setProgressBackgroundColor(int colorRes):设置进度圈的背景色（已经弃用）
        setProgressBackgroundColorSchemeResource （可以）。最新的的setProgressBackgroundColorSchemeColor（Color c） 
        
         3、setColorSchemeResources(int… colorResIds):设置进度动画的颜色。
         
         4、setRefreshing(Boolean refreshing):设置组件的刷洗状态，显示或者隐藏刷新进度条 
         
         5、setSize(int size):设置进度圈的大小，只有两个值：DEFAULT、LARGE
         
         6、postDelayed(new Runable(),long min) 设置刷新延迟时间
        
         7、isRefreshing():检查是否处于刷新状态

布局，具体内容如下：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout 
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:id="@+id/swipeLayout" >
    
   <ListView 
       android:id="@+id/mylist"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"/>
   
</android.support.v4.widget.SwipeRefreshLayout>

Activity核心代码如下：

swipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipeLayout);
  /*加载的渐变动画*/
        swipeRefreshLayout.setColorSchemeResources(R.color.swipe_color_1,
                R.color.swipe_color_2,
                R.color.swipe_color_3,
                R.color.swipe_color_4);
        swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);;
        swipeRefreshLayout.setProgressBackgroundColor(R.color.swipe_background_color);
        //swipeRefreshLayout.setPadding(20, 20, 20, 20);
        //swipeRefreshLayout.setProgressViewOffset(true, 100, 200);
        //swipeRefreshLayout.setDistanceToTriggerSync(50);
        swipeRefreshLayout.setProgressViewEndTarget(true, 100);
        swipeRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        data.clear();
                        for(int i=0;i<20;i++){
                            data.add("SwipeRefreshLayout下拉刷新"+i);
                        }
                        try {
                            Thread.sleep(5000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        mHandler.sendEmptyMessage(1);
                    }
                }).start();
            }
        });
    //handler
    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
            case 1:
                
                swipeRefreshLayout.setRefreshing(false);
                adapter.notifyDataSetChanged();
                //swipeRefreshLayout.setEnabled(false);
                break;
            default:
                break;
            }
        }
    };

• 原生实现上拉效果

通过监听滚动事件，对listview添加底部的组件实现上拉

 implements AbsListView.OnScrollListener {···
 
 
 ···
  /**
         * 对listview添加底部的组件实现上拉
         */
        footerView = getLayoutInflater().inflate(R.layout.refresh_footview_layout, null);
        lv.addFooterView(footerView);
  /**
         * 设置滚动监听
         */
   lv.setOnScrollListener(this);
   
    /**
     * 重写滚动方法
     * @param view
     * @param scrollState
     */
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (adapter.getCount() == visibleLastIndex && scrollState == SCROLL_STATE_IDLE) {
            Toast.makeText(this, "加载更多完成", Toast.LENGTH_SHORT).show();
            footerView.setVisibility(View.GONE);
            /*在此处加载更多数据*/
//            new LoadDataThread().start();
        }else {
            footerView.setVisibility(View.VISIBLE);
//            Toast.makeText(this, "加载更多...", Toast.LENGTH_SHORT).show();
        }

    }
   

---

2.自定义支持上拉刷新的组件

实现下拉和上拉监听

···AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener,
        RefreshLayout.OnLoadListener {
        ···

下拉和原先一样用法：

         //下拉监听
        swipeLayout.setOnRefreshListener(this);
        //上拉监听
        swipeLayout.setOnLoadListener(this);
        
         /**
     * 上拉刷新
     */
    @Override
    public void onRefresh() {
        swipeLayout.postDelayed(new Runnable() {

            @Override
            public void run() {
                // 更新数据  更新完后调用该方法结束刷新
                list.clear();
                for (int i = 0; i < 8; i++) {
                    HashMap<String, String> map = new HashMap<String, String>();
                    map.put("itemImage", i + "刷新");
                    map.put("itemText", i + "刷新");
                    list.add(map);
                }
                adapter.notifyDataSetChanged();
                swipeLayout.setRefreshing(false);
            }
        }, 2000);

    }

    /**
     * 加载更多
     */
    @Override
    public void onLoad() {
        swipeLayout.postDelayed(new Runnable() {
            @Override
            public void run() {
                // 更新数据  更新完后调用该方法结束刷新
                swipeLayout.setLoading(false);
                for (int i = 1; i < 10; i++) {
                    HashMap<String, String> map = new HashMap<String, String>();
                    map.put("itemImage", i + "更多");
                    map.put("itemText", i + "更多");
                    list.add(map);
                }
                adapter.notifyDataSetChanged();
            }
        }, 2000);
    }

        

• 自定义组件如下：

/**
 * Created by huangshuyuan on 2017/3/9.
 * email:hshuuyuan@foxmail.com
 * version:v1.0
 * <p>
 * 自定义view
 */

/**
 * 继承自SwipeRefreshLayout,从而实现滑动到底部时上拉加载更多的功能.
 */
public class RefreshLayout extends SwipeRefreshLayout implements
        OnScrollListener {

    /**
     * 滑动到最下面时的上拉操作
     */

    private int mTouchSlop;
    /**
     * listview实例
     */
    private ListView mListView;

    /**
     * 上拉监听器, 到了最底部的上拉加载操作
     */
    private OnLoadListener mOnLoadListener;

    /**
     * ListView的加载中footer
     */
    private View mListViewFooter;

    /**
     * 按下时的y坐标
     */
    private int mYDown;
    /**
     * 抬起时的y坐标, 与mYDown一起用于滑动到底部时判断是上拉还是下拉
     */
    private int mLastY;
    /**
     * 是否在加载中 ( 上拉加载更多 )
     */
    private boolean isLoading = false;

    /**
     * @param context
     */
    public RefreshLayout(Context context) {
        this(context, null);
    }

    @SuppressLint("InflateParams")
    public RefreshLayout(Context context, AttributeSet attrs) {
        super(context, attrs);

        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();

        mListViewFooter = LayoutInflater.from(context).inflate(
                R.layout.listview_footer, null, false);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right,
                            int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        // 初始化ListView对象
        if (mListView == null) {
            getListView();
        }
    }

    /**
     * 获取ListView对象
     */
    private void getListView() {
        int childs = getChildCount();
        if (childs > 0) {
            View childView = getChildAt(0);
            if (childView instanceof ListView) {
                mListView = (ListView) childView;
                // 设置滚动监听器给ListView, 使得滚动的情况下也可以自动加载
                mListView.setOnScrollListener(this);
                Log.d(VIEW_LOG_TAG, "### 找到listview");
            }
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see android.view.ViewGroup#dispatchTouchEvent(android.view.MotionEvent)
     */
    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        final int action = event.getAction();

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                // 按下
                mYDown = (int) event.getRawY();
                break;

            case MotionEvent.ACTION_MOVE:
                // 移动
                mLastY = (int) event.getRawY();
                break;

            case MotionEvent.ACTION_UP:
                // 抬起
                if (canLoad()) {
                    loadData();
                }
                break;
            default:
                break;
        }

        return super.dispatchTouchEvent(event);
    }

    /**
     * 是否可以加载更多, 条件是到了最底部, listview不在加载中, 且为上拉操作.
     *
     * @return
     */
    private boolean canLoad() {
        return isBottom() && !isLoading && isPullUp();
    }

    /**
     * 判断是否到了最底部
     */
    private boolean isBottom() {

        if (mListView != null && mListView.getAdapter() != null) {
            return mListView.getLastVisiblePosition() == (mListView
                    .getAdapter().getCount() - 1);
        }
        return false;
    }

    /**
     * 是否是上拉操作
     *
     * @return
     */
    private boolean isPullUp() {
        return (mYDown - mLastY) >= mTouchSlop;
    }

    /**
     * 如果到了最底部,而且是上拉操作.那么执行onLoad方法
     */
    private void loadData() {
        if (mOnLoadListener != null) {
            // 设置状态
            setLoading(true);
            //
            mOnLoadListener.onLoad();
        }
    }

    /**
     * @param loading
     */
    public void setLoading(boolean loading) {
        isLoading = loading;
        if (isLoading) {
            mListView.addFooterView(mListViewFooter);
        } else {
            mListView.removeFooterView(mListViewFooter);
            mYDown = 0;
            mLastY = 0;
        }
    }

    /**
     * @param loadListener
     */
    public void setOnLoadListener(OnLoadListener loadListener) {
        mOnLoadListener = loadListener;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {

    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
                         int visibleItemCount, int totalItemCount) {
        // 滚动时到了最底部也可以加载更多
        if (canLoad()) {
            loadData();
        }
    }

    /**
     * 设置刷新
     */
    public static void setRefreshing(SwipeRefreshLayout refreshLayout,
                                     boolean refreshing, boolean notify) {
        Class<? extends SwipeRefreshLayout> refreshLayoutClass = refreshLayout
                .getClass();
        if (refreshLayoutClass != null) {

            try {
                Method setRefreshing = refreshLayoutClass.getDeclaredMethod(
                        "setRefreshing", boolean.class, boolean.class);
                setRefreshing.setAccessible(true);
                setRefreshing.invoke(refreshLayout, refreshing, notify);
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 加载更多的监听器
     */
    public static interface OnLoadListener {
        public void onLoad();
    }
}

---

3.自定义支持ViewPage的刷新组件VPSwipeRefreshLayout

• 原生SwipeRefreshLayout会存在以下问题：

1、 SwipeRefreshLayout会吃掉ViewPager的滑动事件。 

2、 SwipeRefreshLayout需要套在ScrollView和ListView上的时候才表现的比较友好，在其他ViewGroup上有点问题

• 重写后的SwipeRefreshLayout，直接复制到项目就可以使用了。

public class VpSwipeRefreshLayout extends SwipeRefreshLayout {

private float startY;
private float startX;
// 记录viewPager是否拖拽的标记
private boolean mIsVpDragger;
private final int mTouchSlop;

public VpSwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// 记录手指按下的位置
startY = ev.getY();
startX = ev.getX();
// 初始化标记
mIsVpDragger = false;
break;
case MotionEvent.ACTION_MOVE:
// 如果viewpager正在拖拽中，那么不拦截它的事件，直接return false；
if(mIsVpDragger) {
return false;
}

// 获取当前手指位置
float endY = ev.getY();
float endX = ev.getX();
float distanceX = Math.abs(endX - startX);
float distanceY = Math.abs(endY - startY);
// 如果X轴位移大于Y轴位移，那么将事件交给viewPager处理。
if(distanceX > mTouchSlop && distanceX > distanceY) {
mIsVpDragger = true;
return false;
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
// 初始化标记
mIsVpDragger = false;
break;
}
// 如果是Y轴位移大于X轴，事件交给swipeRefreshLayout处理。
return super.onInterceptTouchEvent(ev);
}
}

---

4.RecyclerView+SwpieRefreshLayout实现下拉刷新效果同时实现上拉功能

RecyclerView实现的列表，默认情况下面是不带下拉刷新和上拉记载更多效果的，但是我在我们的实际项目当中，为了提高用户体验，这种效果一般都需要实现

SwipeRefreshLayout本身自带下拉刷新的效果，那么我们可以选择在RecyclerView布局外部嵌套一层SwipeRefreshLayout布局即可，具体布局文件如下:

?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:id="@+id/activity_recycle_view_refresh"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"

    tools:context="com.hsy.refresh.ui.RecycleViewRefreshActivity">

    <include
        layout="@layout/common_top_bar_layout"
        android:visibility="gone" />

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/demo_swiperefreshlayout"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollbars="vertical">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/demo_recycler"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">

        </android.support.v7.widget.RecyclerView>
    </android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>

在Activity中引用这个布局并初始化

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        //去除系统标题
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle_view_refresh);
        ButterKnife.bind(this);

        initView();
    }

    /*RecyclerView 管理器*/
    private LinearLayoutManager linearLayoutManager;
    MyRecyclerViewAdapter adapter;
    private int lastVisibleItem;//记录滚动位置


    /**
     * 初始化组件
     */
    private void initView() {
               topBarTitle.setText("RecyclerView 刷新");

        //设置刷新时动画的颜色，可以设置4个
        swiperefreshLayout.setProgressBackgroundColorSchemeResource(android.R.color.white);
        swiperefreshLayout.setColorSchemeResources(android.R.color.holo_blue_light,
                android.R.color.holo_red_light, android.R.color.holo_orange_light,
                android.R.color.holo_green_light);
        // 这句话是为了，第一次进入页面的时候显示加载进度条
        swiperefreshLayout.setProgressViewOffset(false, 0, (int) TypedValue
                .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources()
                        .getDisplayMetrics()));


        //设置竖直方向
        linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(OrientationHelper.VERTICAL);
        //设置管理器
        recylerview.setLayoutManager(linearLayoutManager);
        //添加分隔线
        recylerview.addItemDecoration(new AdvanceDecoration(this, OrientationHelper.VERTICAL));

        recylerview.setAdapter(adapter = new MyRecyclerViewAdapter(this));
        /*实现下拉*/

        swiperefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        List<String> newDatas = new ArrayList<String>();
                        for (int i = 0; i < 5; i++) {
                            int index = i + 1;
                            newDatas.add("new item" + index);
                        }
                        adapter.addItem(newDatas);/*添加数据*/
                        swiperefreshLayout.setRefreshing(false);
                        Toast.makeText(RecycleViewRefreshActivity.this, "更新了五条数据...", Toast.LENGTH_SHORT).show();
                    }
                }, 3000);
            }
        });

        /**
         * 添加滚动监听，实现上拉刷新
         */

        recylerview.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                //当滚动到底部时刷新数据
                if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItem + 1 == adapter.getItemCount()) {
                    new Handler().postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            List<String> newDatas = new ArrayList<String>();
                            for (int i = 0; i < 5; i++) {
                                int index = i + 1;
                                newDatas.add("more item" + index);
                            }
                            adapter.addMoreItem(newDatas);
                            swiperefreshLayout.setRefreshing(false);

                        }
                    }, 1000);
                }
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                //获取滚动的最后位置
                lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
            }
        });

    }

实现下拉刷新用SwipeRefreshLayout 自带的进度条， 上拉刷新用类似ListView的刷新 提示“加载中”等信息。

我们可以给RecyclerView 也添加一个类似FooterView的item。 我们在Adapter中实现：

/**
     * RecyclerView的适配器
     */

    class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {//自定义viewHoder
        List<String> datas;
        Context context;
        /*加载更多*/
        private static final int TYPE_ITEM = 0;
        private static final int TYPE_FOOTER = 1;

        public MyRecyclerViewAdapter(Context context) {
            this.context = context;

            /*初始化数据*/
            this.datas = new ArrayList<String>();
            for (int i = 0; i < 20; i++) {
                int index = i + 1;
                datas.add("item" + index);
            }
            /*addItem(datas);*/
        }

        //自定义的ViewHolder，持有每个Item的的所有界面元素
        public class ViewHolder extends RecyclerView.ViewHolder {

            public ViewHolder(View view) {
                super(view);
            }
        }


        //自定义的ViewHolder，持有每个Item的的所有界面元素
        public class ItemViewHolder extends ViewHolder {
            public TextView item_tv;

            public ItemViewHolder(View view) {
                super(view);
                item_tv = (TextView) view.findViewById(R.id.text);
            }
        }

        /**
         * 底部view
         */

        class FooterViewHolder extends ViewHolder {

            public FooterViewHolder(View view) {
                super(view);
            }

        }

        /**
         * 绑定布局文件
         *
         * @param parent
         * @param viewType
         * @return
         */
        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            if (viewType == TYPE_FOOTER) {
                final View view = LayoutInflater.from(context).inflate(R.layout.refresh_footview_layout, parent, false);
//                view.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT,
//                        RecyclerView.LayoutParams.WRAP_CONTENT));
                FooterViewHolder viewHolder = new FooterViewHolder(view);
                return viewHolder;

            } else if (viewType == TYPE_ITEM) {

                final View view = LayoutInflater.from(context).inflate(R.layout.item_recycler_layout, parent, false);
                //这边可以做一些属性设置，甚至事件监听绑定
                //view.setBackgroundColor(Color.RED);
                ItemViewHolder viewHolder = new ItemViewHolder(view);
                return viewHolder;
            }
            return null;
        }

        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {
            if (holder instanceof ItemViewHolder) {
                //设置数据
                ((ItemViewHolder) holder).item_tv.setText(datas.get(position));
                ((ItemViewHolder) holder).item_tv.setTag(position);
            }

        }

        /*返回每一项的类型*/
        @Override
        public int getItemViewType(int position) {
            // 最后一个item设置为footerView
            if (position + 1 == getItemCount()) {
                return TYPE_FOOTER;
            } else {
                return TYPE_ITEM;
            }
        }

        // RecyclerView的count设置为数据总条数+ 1（footerView）
        @Override
        public int getItemCount() {
            return datas.size() + 1;
        }

        //添加数据

        public void addItem(List<String> newDatas) {
            //mTitles.add(position, data);
            //notifyItemInserted(position);
            newDatas.addAll(datas);
            datas.removeAll(datas);
            datas.addAll(newDatas);
            notifyDataSetChanged();
        }

        /**
         * 添加更多数据
         *
         * @param newDatas
         */

        public void addMoreItem(List<String> newDatas) {
            datas.addAll(newDatas);
            adapter.notifyDataSetChanged();
        }
    }

refresh_footview_layout

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

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/refresh_text" />
</LinearLayout>

item_recycler_layout

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

    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

---

上面是自己研究的刷新组件的使用，最近发现一个大神已经封装好了一个item侧滑的使用，可以看看大神的

大神的源码地址：https://github.com/yanzhenjie/SwipeRecyclerView

我的博客原文：http://blog.csdn.net/imshuyuan/article/details/62041447