android中SwipeRefresh實(shí)現(xiàn)各種上拉,下拉刷新示例
SwipeRefresh
基于原生的SwipeRefreshLayout 做了封裝處理
此項(xiàng)目中包括種:
1.原生SwipeRefreshLayout(上拉可通過(guò)滾動(dòng)監(jiān)聽(tīng)實(shí)現(xiàn))
2.自定義支持上拉刷新的組件
3.自定義支持ViewPage的刷新組件VPSwipeRefreshLayout
4.RecyclerView+SwpieRefreshLayout實(shí)現(xiàn)下拉刷新效果同時(shí)實(shí)現(xiàn)上拉功能
主界面
1.原生SwipeRefreshLayout(上拉可通過(guò)滾動(dòng)監(jiān)聽(tīng)實(shí)現(xiàn))
除了OnRefreshListener接口外,SwipRefreshLayout中還有一些其他重要的方法,具體如下:
1、setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener):設(shè)置手勢(shì)滑動(dòng)監(jiān)聽(tīng)器。
2、setProgressBackgroundColor(int colorRes):設(shè)置進(jìn)度圈的背景色(已經(jīng)棄用)
setProgressBackgroundColorSchemeResource (可以)。
setProgressBackgroundColorSchemeColor(Color c) (可以)
3、setColorSchemeResources(int… colorResIds):設(shè)置進(jìn)度動(dòng)畫(huà)的顏色。
4、setRefreshing(Boolean refreshing):設(shè)置組件的刷洗狀態(tài),顯示或者隱藏刷新進(jìn)度條
5、setSize(int size):設(shè)置進(jìn)度圈的大小,只有兩個(gè)值:DEFAULT、LARGE
6、postDelayed(new Runable(),long min) 設(shè)置刷新延遲時(shí)間
7、isRefreshing():檢查是否處于刷新?tīng)顟B(tài)
下拉刷新
布局,具體內(nèi)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核心代碼如下:
swipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipeLayout); /*加載的漸變動(dòng)畫(huà)*/ 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; } } };
原生實(shí)現(xiàn)上拉效果
通過(guò)監(jiān)聽(tīng)滾動(dòng)事件,對(duì)listview添加底部的組件實(shí)現(xiàn)上拉
implements AbsListView.OnScrollListener {··· ··· /** * 對(duì)listview添加底部的組件實(shí)現(xiàn)上拉 */ footerView = getLayoutInflater().inflate(R.layout.refresh_footview_layout, null); lv.addFooterView(footerView); /** * 設(shè)置滾動(dòng)監(jiān)聽(tīng) */ lv.setOnScrollListener(this); /** * 重寫(xiě)滾動(dòng)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, "加載更多完成", Toast.LENGTH_SHORT).show(); footerView.setVisibility(View.GONE); /*在此處加載更多數(shù)據(jù)*/ // new LoadDataThread().start(); }else { footerView.setVisibility(View.VISIBLE); // Toast.makeText(this, "加載更多...", Toast.LENGTH_SHORT).show(); } }
2.自定義支持上拉刷新的組件
上拉刷新
實(shí)現(xiàn)下拉和上拉監(jiān)聽(tīng)
···AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener, RefreshLayout.OnLoadListener { ···
下拉和原先一樣用法:
//下拉監(jiān)聽(tīng) swipeLayout.setOnRefreshListener(this); //上拉監(jiān)聽(tīng) swipeLayout.setOnLoadListener(this); /** * 上拉刷新 */ @Override public void onRefresh() { swipeLayout.postDelayed(new Runnable() { @Override public void run() { // 更新數(shù)據(jù) 更新完后調(diào)用該方法結(jié)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); } /** * 加載更多 */ @Override public void onLoad() { swipeLayout.postDelayed(new Runnable() { @Override public void run() { // 更新數(shù)據(jù) 更新完后調(diào)用該方法結(jié)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); }
自定義組件如下:
/** * Created by huangshuyuan on 2017/3/9. * email:hshuuyuan@foxmail.com * version:v1.0 * <p> * 自定義view */ /** * 繼承自SwipeRefreshLayout,從而實(shí)現(xiàn)滑動(dòng)到底部時(shí)上拉加載更多的功能. */ public class RefreshLayout extends SwipeRefreshLayout implements OnScrollListener { /** * 滑動(dòng)到最下面時(shí)的上拉操作 */ private int mTouchSlop; /** * listview實(shí)例 */ private ListView mListView; /** * 上拉監(jiān)聽(tīng)器, 到了最底部的上拉加載操作 */ private OnLoadListener mOnLoadListener; /** * ListView的加載中footer */ private View mListViewFooter; /** * 按下時(shí)的y坐標(biāo) */ private int mYDown; /** * 抬起時(shí)的y坐標(biāo), 與mYDown一起用于滑動(dòng)到底部時(shí)判斷是上拉還是下拉 */ private int mLastY; /** * 是否在加載中 ( 上拉加載更多 ) */ 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對(duì)象 if (mListView == null) { getListView(); } } /** * 獲取ListView對(duì)象 */ private void getListView() { int childs = getChildCount(); if (childs > 0) { View childView = getChildAt(0); if (childView instanceof ListView) { mListView = (ListView) childView; // 設(shè)置滾動(dòng)監(jiān)聽(tīng)器給ListView, 使得滾動(dòng)的情況下也可以自動(dòng)加載 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: // 移動(dòng) mLastY = (int) event.getRawY(); break; case MotionEvent.ACTION_UP: // 抬起 if (canLoad()) { loadData(); } break; default: break; } return super.dispatchTouchEvent(event); } /** * 是否可以加載更多, 條件是到了最底部, listview不在加載中, 且為上拉操作. * * @return */ private boolean canLoad() { return isBottom() && !isLoading && isPullUp(); } /** * 判斷是否到了最底部 */ 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.那么執(zhí)行onLoad方法 */ private void loadData() { if (mOnLoadListener != null) { // 設(shè)置狀態(tài) 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) { // 滾動(dòng)時(shí)到了最底部也可以加載更多 if (canLoad()) { loadData(); } } /** * 設(shè)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(); } } } /** * 加載更多的監(jiān)聽(tīng)器 */ public static interface OnLoadListener { public void onLoad(); } }
3.自定義支持ViewPage的刷新組件VPSwipeRefreshLayout
支持viewpager刷新
原生SwipeRefreshLayout會(huì)存在以下問(wèn)題:
1、 SwipeRefreshLayout會(huì)吃掉ViewPager的滑動(dòng)事件。
2、 SwipeRefreshLayout需要套在ScrollView和ListView上的時(shí)候才表現(xiàn)的比較友好,在其他ViewGroup上有點(diǎn)問(wèn)題
重寫(xiě)后的SwipeRefreshLayout,直接復(fù)制到項(xiàng)目就可以使用了。
public class VpSwipeRefreshLayout extends SwipeRefreshLayout { private float startY; private float startX; // 記錄viewPager是否拖拽的標(biāo)記 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: // 記錄手指按下的位置 startY = ev.getY(); startX = ev.getX(); // 初始化標(biāo)記 mIsVpDragger = false; break; case MotionEvent.ACTION_MOVE: // 如果viewpager正在拖拽中,那么不攔截它的事件,直接return false; if(mIsVpDragger) { return false; } // 獲取當(dāng)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軸位移大于Y軸位移,那么將事件交給viewPager處理。 if(distanceX > mTouchSlop && distanceX > distanceY) { mIsVpDragger = true; return false; } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: // 初始化標(biāo)記 mIsVpDragger = false; break; } // 如果是Y軸位移大于X軸,事件交給swipeRefreshLayout處理。 return super.onInterceptTouchEvent(ev); } }
4.RecyclerView+SwpieRefreshLayout實(shí)現(xiàn)下拉刷新效果同時(shí)實(shí)現(xiàn)上拉功能
RecyclerView+SwpieRefreshLayout
RecyclerView實(shí)現(xiàn)的列表,默認(rèn)情況下面是不帶下拉刷新和上拉記載更多效果的,但是我在我們的實(shí)際項(xiàng)目當(dāng)中,為了提高用戶(hù)體驗(yàn),這種效果一般都需要實(shí)現(xiàn)
SwipeRefreshLayout本身自帶下拉刷新的效果,那么我們可以選擇在RecyclerView布局外部嵌套一層SwipeRefreshLayout布局即可,具體布局文件如下:
<?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A(yíng)ctivity中引用這個(gè)布局并初始化
@Override protected void onCreate(Bundle savedInstanceState) { //去除系統(tǒng)標(biāo)題 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;//記錄滾動(dòng)位置 /** * 初始化組件 */ private void initView() { topBarTitle.setText("RecyclerView 刷新"); //設(shè)置刷新時(shí)動(dòng)畫(huà)的顏色,可以設(shè)置4個(gè) 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); // 這句話(huà)是為了,第一次進(jìn)入頁(yè)面的時(shí)候顯示加載進(jìn)度條 swiperefreshLayout.setProgressViewOffset(false, 0, (int) TypedValue .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources() .getDisplayMetrics())); //設(shè)置豎直方向 linearLayoutManager = new LinearLayoutManager(this); linearLayoutManager.setOrientation(OrientationHelper.VERTICAL); //設(shè)置管理器 recylerview.setLayoutManager(linearLayoutManager); //添加分隔線(xiàn) recylerview.addItemDecoration(new AdvanceDecoration(this, OrientationHelper.VERTICAL)); recylerview.setAdapter(adapter = new MyRecyclerViewAdapter(this)); /*實(shí)現(xiàn)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);/*添加數(shù)據(jù)*/ swiperefreshLayout.setRefreshing(false); Toast.makeText(RecycleViewRefreshActivity.this, "更新了五條數(shù)據(jù)...", Toast.LENGTH_SHORT).show(); } }, 3000); } }); /** * 添加滾動(dòng)監(jiān)聽(tīng),實(shí)現(xiàn)上拉刷新 */ recylerview.setOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); //當(dāng)滾動(dòng)到底部時(shí)刷新數(shù)據(jù) 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); //獲取滾動(dòng)的最后位置 lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition(); } }); }
實(shí)現(xiàn)下拉刷新用SwipeRefreshLayout 自帶的進(jìn)度條, 上拉刷新用類(lèi)似ListView的刷新 提示“加載中”等信息。
我們可以給RecyclerView 也添加一個(gè)類(lèi)似FooterView的item。
我們?cè)贏(yíng)dapter中實(shí)現(xiàn):
/** * RecyclerView的適配器 */ class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {//自定義viewHoder List<String> datas; Context context; /*加載更多*/ private static final int TYPE_ITEM = 0; private static final int TYPE_FOOTER = 1; public MyRecyclerViewAdapter(Context context) { this.context = context; /*初始化數(shù)據(jù)*/ this.datas = new ArrayList<String>(); for (int i = 0; i < 20; i++) { int index = i + 1; datas.add("item" + index); } /*addItem(datas);*/ } //自定義的ViewHolder,持有每個(gè)Item的的所有界面元素 public class ViewHolder extends RecyclerView.ViewHolder { public ViewHolder(View view) { super(view); } } //自定義的ViewHolder,持有每個(gè)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); } } /** * 綁定布局文件 * * @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); //這邊可以做一些屬性設(shè)置,甚至事件監(jiān)聽(tīng)綁定 //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) { //設(shè)置數(shù)據(jù) ((ItemViewHolder) holder).item_tv.setText(datas.get(position)); ((ItemViewHolder) holder).item_tv.setTag(position); } } /*返回每一項(xiàng)的類(lèi)型*/ @Override public int getItemViewType(int position) { // 最后一個(gè)item設(shè)置為footerView if (position + 1 == getItemCount()) { return TYPE_FOOTER; } else { return TYPE_ITEM; } } // RecyclerView的count設(shè)置為數(shù)據(jù)總條數(shù)+ 1(footerView) @Override public int getItemCount() { return datas.size() + 1; } //添加數(shù)據(jù) public void addItem(List<String> newDatas) { //mTitles.add(position, data); //notifyItemInserted(position); newDatas.addAll(datas); datas.removeAll(datas); datas.addAll(newDatas); notifyDataSetChanged(); } /** * 添加更多數(shù)據(jù) * * @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>
項(xiàng)目源碼:SwipeRefresh_jb51.rar
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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