基于原生的SwipeRefreshLayout 做了封装处理
compile 'com.hsy:refreshlibrary:1.0'
<dependency>
<groupId>com.hsy</groupId>
<artifactId>refreshlibrary</artifactId>
<version>1.0</version>
<type>pom</type>
</dependency>
-
1.原生SwipeRefreshLayout（上拉可通过滚动监听实现）
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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
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();
}
}
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();
}
}
- 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);
}
}
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