PullToRefresh 下拉刷新 上拉加載

• 掌握自定義的具有下拉刷新和上拉加載功能的 ListView
• 掌握自定義的側(cè)邊欄 SlidingMenu

在日常開(kāi)發(fā)工作中，應(yīng)用界面常常都是用ListView進(jìn)行數(shù)據(jù)展示的，并且界面可以實(shí)現(xiàn)下拉刷新和下拉加載功能，本文從根本上來(lái)自定義一個(gè)具有下拉刷新和上拉加載的 ListView。另外，側(cè)邊欄 SlidingMenu的應(yīng)用場(chǎng)景也很多，這里我們也自定義一個(gè)具有側(cè)欄欄效果的 SlidingMenu。

自定義控件之 ListView

項(xiàng)目概述

這里我們將使用前面所學(xué)的自定義控件的知識(shí)來(lái)進(jìn)行自定義一個(gè)具有下拉刷新和上拉加載的ListView如圖所示。

布局界面 UI

在本章中，主界面為 MainActivity.java，具體代碼如文件【2-1】所示：【文件 2-1】 activity_main.xml

<RelativeLayout 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"><com.itheima.refreshlistview.view.RefreshListView android:id="@+id/refreshLv"android:layout_width="match_parent"android:layout_height="match_parent"></com.itheima.refreshlistview.view.RefreshListView> </RelativeLayout>

另外，頭布局 listview_header.xml 的代碼如下所示。【文件 2-2】 listview_header.xml

<?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:orientation="horizontal" ><FrameLayout android:layout_width="wrap_content"android:layout_height="wrap_content" ><ImageView android:id="@+id/header_iv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:src="@drawable/common_listview_headview_red_arrow" /><ProgressBar android:id="@+id/header_pb"android:visibility="invisible"android:layout_width="wrap_content"android:layout_height="wrap_content"android:indeterminateDrawable="@drawable/custom_progressbar"android:layout_gravity="center" /></FrameLayout><LinearLayout android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:gravity="center" ><TextView android:id="@+id/tv_state"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="下拉刷新"android:textColor="#ff0000" /><TextView android:id="@+id/tv_time"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="最近更新時(shí)間： 1999-9-9 9:9:9"android:textColor="#ff0000" /></LinearLayout> </LinearLayout>

根布局 listview_footer.xml 的代碼如下所示 【文件 2-3】 listview_header.xml

<?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"android:orientation="horizontal" ><ProgressBar android:id="@+id/header_pb"android:layout_width="wrap_content"android:layout_height="wrap_content"android:indeterminateDrawable="@drawable/custom_progressbar" /><TextView android:id="@+id/tv_state"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="20dp"android:text="加載更多..."android:textColor="#ff0000" /> </LinearLayout>

運(yùn)行程序，效果圖如圖所示。

主界面業(yè)務(wù)邏輯

觀察市場(chǎng)上手機(jī)應(yīng)用項(xiàng)目的功能界面，發(fā)現(xiàn)幾乎都具有下拉刷新和上拉加載的功能效果，這里我們就將要實(shí)現(xiàn)該功能，主界面 MainActivity.java 的業(yè)務(wù)邏輯如下所示：【文件 2-4】 MainActivity.java

public class MainActivity extends Activity {private List<String> datas;private Handler handler = new Handler();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);final RefreshListView refreshLv = (RefreshListView) findViewById(R.id.refreshLv);initData();final MyAdapter adapter = new MyAdapter();refreshLv.setAdapter(adapter);refreshLv.setOnRefreshListener(new OnRefreshListener() {@Overridepublic void onFresh() {handler.postDelayed(new Runnable() {@Overridepublic void run() {datas.add(0, "這是下拉刷新的新數(shù)據(jù)");adapter.notifyDataSetChanged();refreshLv.onFinish();}}, 3000);}@Overridepublic void onLoadMore() {handler.postDelayed(new Runnable() {@Overridepublic void run() {datas.add("這是加載更多的數(shù)據(jù) 1");datas.add("這是加載更多的數(shù)據(jù) 2");datas.add("這是加載更多的數(shù)據(jù) 3");adapter.notifyDataSetChanged();refreshLv.onFinish();}}, 3000);}});}private void initData() {datas = new ArrayList<String>();for (int i = 0; i < 30; i++) {datas.add("這是 listview 的數(shù)據(jù)" + i);}}private class MyAdapter extends BaseAdapter {@Overridepublic int getCount() {return datas.size();}@Overridepublic Object getItem(int position) {return null;}@Overridepublic long getItemId(int position) {return 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {TextView tv = new TextView(getApplicationContext());tv.setText(datas.get(position));tv.setTextSize(15);tv.setTextColor(Color.BLACK);tv.setPadding(5, 5, 5, 5);return tv;}}}

自定義 ListView 的業(yè)務(wù)邏輯

下面我們將實(shí)現(xiàn)自定義 ListView 的主邏輯代碼，自定義的 RefreshListView 通過(guò)繼承 ListView 并進(jìn)行相應(yīng)的邏輯修改達(dá)到我們需要的效果?！疚募?2-5】 RefreshListView.java

public class RefreshListView extends ListView implements OnScrollListener {private int downY;private View headerView;//頭布局private int headerViewdHeight;//頭布局的高度private final int DOWN_PULL = 0;//下拉刷新?tīng)顟B(tài)private final int RELEASE_REFRESH = 1;//松開(kāi)刷新?tīng)顟B(tài)private final int REFRESHING = 2;//正在刷新?tīng)顟B(tài)private int currentState = DOWN_PULL;//記錄當(dāng)前狀態(tài)，默認(rèn)為下拉刷新private ImageView header_iv;private ProgressBar header_pb;private TextView tv_state;private TextView tv_time;private RotateAnimation upAnimation;//向上的動(dòng)畫(huà)private RotateAnimation downAnimation;//向下的動(dòng)畫(huà)private OnRefreshListener mOnRefreshListener;//刷新的回調(diào)接口對(duì)象private boolean isLoadingMore = false;//記錄加載更多的狀態(tài)，默認(rèn)值為 falseprivate View footerView;private int footerViewHeight;public RefreshListView(Context context) {this(context, null);}public RefreshListView(Context context, AttributeSet attrs) {super(context, attrs);initHeaderView();initFooterView();init();setOnScrollListener(this);}//初始化，就添加一個(gè)腳布局private void initFooterView() {footerView = View.inflate(getContext(), R.layout.listview_footer, null);//獲取腳布局的高度footerView.measure(0, 0);footerViewHeight = footerView.getMeasuredHeight();//設(shè)置腳布局的 paddingtopfooterView.setPadding(0, -footerViewHeight, 0, 0);this.addFooterView(footerView);}//初始化方法，這里是設(shè)置下拉刷新布局中的箭頭動(dòng)畫(huà)private void init() {upAnimation = new RotateAnimation(0, -180, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);upAnimation.setDuration(500);upAnimation.setFillAfter(true);downAnimation = new RotateAnimation(-180, -360,Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);downAnimation.setDuration(500);downAnimation.setFillAfter(true);}//初始化頭布局private void initHeaderView() {headerView = View.inflate(getContext(), R.layout.listview_header, null);header_iv = (ImageView) headerView.findViewById(R.id.header_iv);header_pb = (ProgressBar) headerView.findViewById(R.id.header_pb);tv_state = (TextView) headerView.findViewById(R.id.tv_state);tv_time = (TextView) headerView.findViewById(R.id.tv_time);//獲得 headerview 的高度headerView.measure(0, 0);//讓系統(tǒng)去測(cè)量控件的寬高headerViewdHeight = headerView.getMeasuredHeight();// headerView.getHeight();//這里獲得值永遠(yuǎn)為 0，它還沒(méi)經(jīng)過(guò)測(cè)量//給 headerview 設(shè)置 paddingtopheaderView.setPadding(0, -headerViewdHeight, 0, 0);//添加頭布局this.addHeaderView(headerView);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:downY = (int) ev.getY();break;case MotionEvent.ACTION_MOVE:if(currentState == REFRESHING){break;}int moveY = (int) ev.getY();int diff = moveY -downY;int paddingTop = -headerViewdHeight + diff;//獲得當(dāng)前列表顯示的第一個(gè)條目的索引int firstVisiablePosition = getFirstVisiblePosition();//只有當(dāng) paddingTop 大于頭部高度的負(fù)數(shù)時(shí)才進(jìn)行處理if(paddingTop > -headerViewdHeight&&firstVisiablePosition == 0){System.out.println(currentState+"");//當(dāng)前頭布局完全顯示，為松開(kāi)刷新?tīng)顟B(tài),下拉刷新變成松開(kāi)刷新的時(shí)候if(paddingTop > 0&&currentState == DOWN_PULL){System.out.println("松開(kāi)刷新");currentState = RELEASE_REFRESH;switchViewOnStateChange();//當(dāng)前頭布局補(bǔ)完全顯示，為下拉刷新?tīng)顟B(tài),松開(kāi)刷新變成下拉刷新的時(shí)候}else if((paddingTop < 0&&currentState == RELEASE_REFRESH)){System.out.println("下拉刷新");currentState = DOWN_PULL;switchViewOnStateChange();}// System.out.println("paddingTop = "+ paddingTop);headerView.setPadding(0, paddingTop, 0, 0);return true;//自己處理觸摸事件}// break;case MotionEvent.ACTION_UP:if(currentState == DOWN_PULL){//當(dāng)前狀態(tài)為下拉刷新，隱藏頭布局headerView.setPadding(0, -headerViewdHeight, 0, 0);}else if(currentState == RELEASE_REFRESH){//當(dāng)前狀態(tài)為松開(kāi)刷新,改變狀態(tài)currentState = REFRESHING;switchViewOnStateChange();if(mOnRefreshListener != null){//正在刷新時(shí)，調(diào)用回調(diào)方法mOnRefreshListener.onFresh();}}break;default:break;}return super.onTouchEvent(ev); //listview 自己處理觸摸事件，}//根據(jù)當(dāng)前的狀態(tài)來(lái)改變頭布局的內(nèi)容private void switchViewOnStateChange(){switch (currentState) {case DOWN_PULL://下拉刷新header_iv.startAnimation(downAnimation);tv_state.setText("下拉刷新");break;case RELEASE_REFRESH://松開(kāi)刷新header_iv.startAnimation(upAnimation);tv_state.setText("松開(kāi)刷新");break;case REFRESHING://正在刷新header_iv.clearAnimation();header_iv.setVisibility(View.INVISIBLE);header_pb.setVisibility(View.VISIBLE);tv_state.setText("正在刷新...");headerView.setPadding(0, 0, 0, 0);break;default:break;}}public void setOnRefreshListener(OnRefreshListener listener){this.mOnRefreshListener = listener;}//刷新的回調(diào)接口public interface OnRefreshListener{//下拉刷新回調(diào)方法void onFresh();//加載更多的回調(diào)方法void onLoadMore();}//當(dāng)刷新完畢過(guò)后，調(diào)用的回調(diào)方法public void onFinish() {if(isLoadingMore){//加載更多//隱藏腳布局footerView.setPadding(0, -footerViewHeight, 0, 0);//改變狀態(tài)isLoadingMore = false;}else{//加載更多//箭頭圖片顯示header_iv.setVisibility(View.VISIBLE);//進(jìn)度圈隱藏header_pb.setVisibility(View.INVISIBLE);//文字狀態(tài)改變tv_state.setText("下拉刷新");//頭布局隱藏headerView.setPadding(0, -headerViewdHeight, 0, 0);//狀態(tài)值改變currentState = DOWN_PULL;//修改更新時(shí)間tv_time.setText("最近刷新時(shí)間： "+getTime());}}//獲取當(dāng)前刷新后的時(shí)間private String getTime() {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return sdf.format(new Date());}//當(dāng)滾動(dòng)發(fā)生改變時(shí)，調(diào)用該方法// OnScrollListener.SCROLL_STATE_FLING;2 手指用力滑動(dòng)一下，離開(kāi)屏幕，listview 有一個(gè)慣性的滑動(dòng)狀態(tài)// OnScrollListener.SCROLL_STATE_IDLE;0 listview 列表處于停滯狀態(tài)，手指沒(méi)有觸摸屏幕// OnScrollListener.SCROLL_STATE_TOUCH_SCROLL;1 手指觸摸著屏幕，上下滑動(dòng)的狀態(tài)@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {System.out.println("scrollState" + scrollState);//手指離開(kāi)屏幕，并且列表顯示到最后一條數(shù)據(jù)的時(shí)候int lastVisiablePosition = getLastVisiblePosition();if(scrollState !=OnScrollListener.SCROLL_STATE_TOUCH_SCROLL&&lastVisiablePosition== (getCount()-1)&&!isLoadingMore){System.out.println("加載更多");isLoadingMore = true;footerView.setPadding(0, 0, 0, 0);setSelection(getCount()-1);if(mOnRefreshListener != null){mOnRefreshListener.onLoadMore();}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {}}

自定義 ListView 之后，在主界面布局中使用改寫(xiě)好的 ListView 類(lèi)的全路徑引入，這樣定義好之后，運(yùn)行程序，效果圖如圖所示

ListView

效果圖

下拉刷新原理

• 給ListView添加header頭布局，設(shè)置負(fù)的padding值，當(dāng)下拉刷新的時(shí)候，給header設(shè)置正的padding值，顯示header
• 給ListView添加footer腳布局，設(shè)置負(fù)的padding值，當(dāng)上拉到底部的時(shí)候，給footer設(shè)置正的padding值，顯示footer
• 判斷是否加載更多，監(jiān)聽(tīng)ListView的滾動(dòng)事件，當(dāng)ListView滾動(dòng)狀態(tài)處于fling，如果當(dāng)前可見(jiàn)的position==集合的個(gè)數(shù)list.size()
• 加載更多：

list.addAll(data); adapter.notifyDataSetChange();

• 下拉刷新：list.add(0,data);

重寫(xiě)onTouchEvent(),判斷當(dāng)前下拉手勢(shì)

實(shí)現(xiàn)代碼

public class RefreshListView extends ListView implements OnScrollListener,android.widget.AdapterView.OnItemClickListener {private static final int STATE_PULL_REFRESH = 0;// 下拉刷新private static final int STATE_RELEASE_REFRESH = 1;// 松開(kāi)刷新private static final int STATE_REFRESHING = 2;// 正在刷新private int mCurrrentState = STATE_PULL_REFRESH;// 當(dāng)前狀態(tài)private View mHeaderView;//頭布局private int mHeaderViewHeight;//頭布局高度private TextView tvTitle;private TextView tvTime;private ImageView ivArrow;private ProgressBar pbProgress;private RotateAnimation animUp;private RotateAnimation animDown;private View mFooterView;//腳布局private int mFooterViewHeight;//腳布局高度private int startY = -1;// 滑動(dòng)起點(diǎn)的y坐標(biāo)OnRefreshListener mListener;public RefreshListView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);initHeaderView();initFooterView();}public RefreshListView(Context context, AttributeSet attrs) {super(context, attrs);initHeaderView();initFooterView();}public RefreshListView(Context context) {super(context);initHeaderView();initFooterView();}/*** 初始化頭布局*/private void initHeaderView() {mHeaderView = View.inflate(getContext(), R.layout.refresh_header, null);this.addHeaderView(mHeaderView);//添加頭布局tvTitle = (TextView) mHeaderView.findViewById(R.id.tv_title);tvTime = (TextView) mHeaderView.findViewById(R.id.tv_time);ivArrow = (ImageView) mHeaderView.findViewById(R.id.iv_arr);pbProgress = (ProgressBar) mHeaderView.findViewById(R.id.pb_progress);mHeaderView.measure(0, 0);mHeaderViewHeight = mHeaderView.getMeasuredHeight();mHeaderView.setPadding(0, -mHeaderViewHeight, 0, 0);// 隱藏頭布局initArrowAnim();tvTime.setText("最后刷新時(shí)間:" + getCurrentTime());}/** 初始化腳布局*/private void initFooterView() {mFooterView = View.inflate(getContext(),R.layout.refresh_listview_footer, null);this.addFooterView(mFooterView);//添加腳布局mFooterView.measure(0, 0);mFooterViewHeight = mFooterView.getMeasuredHeight();mFooterView.setPadding(0, -mFooterViewHeight, 0, 0);// 隱藏this.setOnScrollListener(this);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:startY = (int) ev.getRawY();break;case MotionEvent.ACTION_MOVE:if (startY == -1) {// 確保startY有效startY = (int) ev.getRawY();}if (mCurrrentState == STATE_REFRESHING) {// 正在刷新時(shí)不做處理break;}int endY = (int) ev.getRawY();int dy = endY - startY;// 移動(dòng)偏移量if (dy > 0 && getFirstVisiblePosition() == 0) {// 只有下拉并且當(dāng)前是第一個(gè)item,才允許下拉int padding = dy - mHeaderViewHeight;// 計(jì)算paddingmHeaderView.setPadding(0, padding, 0, 0);// 設(shè)置當(dāng)前paddingif (padding > 0 && mCurrrentState != STATE_RELEASE_REFRESH) {// 狀態(tài)改為松開(kāi)刷新mCurrrentState = STATE_RELEASE_REFRESH;refreshState();} else if (padding < 0 && mCurrrentState != STATE_PULL_REFRESH) {// 改為下拉刷新?tīng)顟B(tài)mCurrrentState = STATE_PULL_REFRESH;refreshState();}return true;}break;case MotionEvent.ACTION_UP:startY = -1;// 重置if (mCurrrentState == STATE_RELEASE_REFRESH) {mCurrrentState = STATE_REFRESHING;// 正在刷新mHeaderView.setPadding(0, 0, 0, 0);// 顯示refreshState();} else if (mCurrrentState == STATE_PULL_REFRESH) {mHeaderView.setPadding(0, -mHeaderViewHeight, 0, 0);// 隱藏}break;}return super.onTouchEvent(ev);}/*** 刷新下拉控件的布局*/private void refreshState() {switch (mCurrrentState) {case STATE_PULL_REFRESH:tvTitle.setText("下拉刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);ivArrow.startAnimation(animDown);break;case STATE_RELEASE_REFRESH:tvTitle.setText("松開(kāi)刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);ivArrow.startAnimation(animUp);break;case STATE_REFRESHING:tvTitle.setText("正在刷新...");ivArrow.clearAnimation();// 必須先清除動(dòng)畫(huà),才能隱藏ivArrow.setVisibility(View.INVISIBLE);pbProgress.setVisibility(View.VISIBLE);if (mListener != null) {mListener.onRefresh();}break;}}/*** 初始化箭頭動(dòng)畫(huà)*/private void initArrowAnim() {// 箭頭向上動(dòng)畫(huà)animUp = new RotateAnimation(0, -180, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);animUp.setDuration(200);animUp.setFillAfter(true);// 箭頭向下動(dòng)畫(huà)animDown = new RotateAnimation(-180, 0, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF, 0.5f);animDown.setDuration(200);animDown.setFillAfter(true);}public void setOnRefreshListener(OnRefreshListener listener) {mListener = listener;}public interface OnRefreshListener {public void onRefresh();public void onLoadMore();// 加載下一頁(yè)數(shù)據(jù)}/** 收起下拉刷新的控件*/public void onRefreshComplete(boolean success) {if (isLoadingMore) {// 正在加載更多...mFooterView.setPadding(0, -mFooterViewHeight, 0, 0);// 隱藏腳布局isLoadingMore = false;} else {mCurrrentState = STATE_PULL_REFRESH;tvTitle.setText("下拉刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);mHeaderView.setPadding(0, -mHeaderViewHeight, 0, 0);// 隱藏if (success) {tvTime.setText("最后刷新時(shí)間:" + getCurrentTime());}}}/*** 獲取當(dāng)前時(shí)間*/public String getCurrentTime() {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return format.format(new Date());}private boolean isLoadingMore;@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {if (scrollState == SCROLL_STATE_IDLE|| scrollState == SCROLL_STATE_FLING) {if (getLastVisiblePosition() == getCount() - 1 && !isLoadingMore) {// 滑動(dòng)到最后System.out.println("到底了.....");mFooterView.setPadding(0, 0, 0, 0);// 顯示setSelection(getCount() - 1);// 改變listview顯示位置isLoadingMore = true;if (mListener != null) {mListener.onLoadMore();}}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {}OnItemClickListener mItemClickListener;@Overridepublic void setOnItemClickListener(android.widget.AdapterView.OnItemClickListener listener) {super.setOnItemClickListener(this);mItemClickListener = listener;}@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {if (mItemClickListener != null) {mItemClickListener.onItemClick(parent, view, position- getHeaderViewsCount(), id);}}}

應(yīng)用

private RefreshListView lvList;// 新聞列表// 將頭條新聞以頭布局的形式加給listview lvList.addHeaderView(headerView);// 設(shè)置下拉刷新監(jiān)聽(tīng)lvList.setOnRefreshListener(new OnRefreshListener() {@Overridepublic void onRefresh() {getDataFromServer();}@Overridepublic void onLoadMore() {if (mMoreUrl != null) {getMoreDataFromServer();} else {Toast.makeText(mActivity, "最后一頁(yè)了", Toast.LENGTH_SHORT).show();lvList.onRefreshComplete(false);// 收起加載更多的布局}}});private void getDataFromServer() {HttpUtils utils = new HttpUtils();utils.send(HttpMethod.GET, mUrl, new RequestCallBack<String>() {@Overridepublic void onSuccess(ResponseInfo<String> responseInfo) {String result = (String) responseInfo.result;System.out.println("頁(yè)簽詳情頁(yè)返回結(jié)果:" + result);parseData(result, false);lvList.onRefreshComplete(true);// 設(shè)置緩存CacheUtils.setCache(mUrl, result, mActivity);}@Overridepublic void onFailure(HttpException error, String msg) {Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT).show();error.printStackTrace();lvList.onRefreshComplete(false);}});}/*** 加載下一頁(yè)數(shù)據(jù)*/private void getMoreDataFromServer() {HttpUtils utils = new HttpUtils();utils.send(HttpMethod.GET, mMoreUrl, new RequestCallBack<String>() {@Overridepublic void onSuccess(ResponseInfo<String> responseInfo) {String result = (String) responseInfo.result;parseData(result, true);lvList.onRefreshComplete(true);}@Overridepublic void onFailure(HttpException error, String msg) {Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT).show();error.printStackTrace();lvList.onRefreshComplete(false);}});}protected void parseData(String result, boolean isMore) {Gson gson = new Gson();mTabDetailData = gson.fromJson(result, TabData.class);System.out.println("頁(yè)簽詳情解析:" + mTabDetailData);// 處理下一頁(yè)鏈接String more = mTabDetailData.data.more;if (!TextUtils.isEmpty(more)) {mMoreUrl = GlobalContants.SERVER_URL + more;} else {mMoreUrl = null;}if (!isMore) {mTopNewsList = mTabDetailData.data.topnews;mNewsList = mTabDetailData.data.news;if (mTopNewsList != null) {mViewPager.setAdapter(new TopNewsAdapter());mIndicator.setViewPager(mViewPager);mIndicator.setSnap(true);// 支持快照顯示mIndicator.setOnPageChangeListener(this);mIndicator.onPageSelected(0);// 讓指示器重新定位到第一個(gè)點(diǎn)tvTitle.setText(mTopNewsList.get(0).title);}if (mNewsList != null) {mNewsAdapter = new NewsAdapter();lvList.setAdapter(mNewsAdapter);}// 自動(dòng)輪播條顯示if (mHandler == null) {mHandler = new Handler() {public void handleMessage(android.os.Message msg) {int currentItem = mViewPager.getCurrentItem();if (currentItem < mTopNewsList.size() - 1) {currentItem++;} else {currentItem = 0;}mViewPager.setCurrentItem(currentItem);// 切換到下一個(gè)頁(yè)面mHandler.sendEmptyMessageDelayed(0, 3000);// 繼續(xù)延時(shí)3秒發(fā)消息,// 形成循環(huán)};};mHandler.sendEmptyMessageDelayed(0, 3000);// 延時(shí)3秒后發(fā)消息}} else {// 如果是加載下一頁(yè),需要將數(shù)據(jù)追加給原來(lái)的集合ArrayList<TabNewsData> news = mTabDetailData.data.news;mNewsList.addAll(news);mNewsAdapter.notifyDataSetChanged();}} RefreshListView refreshLv = (RefreshListView) findViewById(R.id.refreshLv);initData();final MyAdapter adapter = new MyAdapter();refreshLv.setAdapter(adapter);refreshLv.setOnRefreshListener(new OnRefreshListener() {@Overridepublic void onFresh() {handler.postDelayed(new Runnable() {@Overridepublic void run() {datas.add(0, "這是下拉刷新的新數(shù)據(jù)");adapter.notifyDataSetChanged();refreshLv.onFinish();}}, 3000);}@Overridepublic void onLoadMore() {handler.postDelayed(new Runnable() {@Overridepublic void run() {datas.add("這是加載更多的數(shù)據(jù)1");datas.add("這是加載更多的數(shù)據(jù)2");datas.add("這是加載更多的數(shù)據(jù)3");adapter.notifyDataSetChanged();refreshLv.onFinish();}}, 3000);}}); public class RefreshListView extends ListView implements AbsListView.OnScrollListener {private int downY;private View headerView;//頭布局private int headerViewdHeight;//頭布局的高度private final int DOWN_PULL = 0;//下拉刷新?tīng)顟B(tài)private final int RELEASE_REFRESH = 1;//松開(kāi)刷新?tīng)顟B(tài)private final int REFRESHING = 2;//正在刷新?tīng)顟B(tài)private int currentState = DOWN_PULL;//記錄當(dāng)前狀態(tài)，默認(rèn)為下拉刷新private ImageView header_iv;private ProgressBar header_pb;private TextView tv_state;private TextView tv_time;private RotateAnimation upAnimation;//向上的動(dòng)畫(huà)private RotateAnimation downAnimation;//向下的動(dòng)畫(huà)private OnRefreshListener mOnRefreshListener;//刷新的回調(diào)接口對(duì)象private boolean isLoadingMore = false;//記錄加載更多的狀態(tài)，默認(rèn)值為falseprivate View footerView;private int footerViewHeight;public RefreshListView(Context context) {this(context, null);}public RefreshListView(Context context, AttributeSet attrs) {super(context, attrs);initHeaderView();initFooterView();init();setOnScrollListener(this);}//初始化，就添加一個(gè)腳布局private void initFooterView() {footerView = View.inflate(getContext(), R.layout.listview_footer, null);//獲取腳布局的高度footerView.measure(0, 0);footerViewHeight = footerView.getMeasuredHeight();//設(shè)置腳布局的paddingtopfooterView.setPadding(0, -footerViewHeight, 0, 0);this.addFooterView(footerView);}//初始化方法，這里是設(shè)置下拉刷新布局中的箭頭動(dòng)畫(huà)private void init() {upAnimation = new RotateAnimation(0, -180, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);upAnimation.setDuration(500);upAnimation.setFillAfter(true);downAnimation = new RotateAnimation(-180, -360, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);downAnimation.setDuration(500);downAnimation.setFillAfter(true);}//初始化頭布局private void initHeaderView() {headerView = View.inflate(getContext(), R.layout.listview_header, null);header_iv = (ImageView) headerView.findViewById(R.id.header_iv);header_pb = (ProgressBar) headerView.findViewById(R.id.header_pb);tv_state = (TextView) headerView.findViewById(R.id.tv_state);tv_time = (TextView) headerView.findViewById(R.id.tv_time);//獲得headerview 的高度headerView.measure(0, 0);//讓系統(tǒng)去測(cè)量控件的寬高headerViewdHeight = headerView.getMeasuredHeight();// headerView.getHeight();//這里獲得值永遠(yuǎn)為0，它還沒(méi)經(jīng)過(guò)測(cè)量//給headerview 設(shè)置paddingtopheaderView.setPadding(0, -headerViewdHeight, 0, 0);//添加頭布局this.addHeaderView(headerView);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:downY = (int) ev.getY();break;case MotionEvent.ACTION_MOVE:if (currentState == REFRESHING) {break;}int moveY = (int) ev.getY();int diff = moveY - downY;int paddingTop = -headerViewdHeight + diff;//獲得當(dāng)前列表顯示的第一個(gè)條目的索引int firstVisiablePosition = getFirstVisiblePosition();//只有當(dāng)paddingTop 大于頭部高度的負(fù)數(shù)時(shí)才進(jìn)行處理if (paddingTop > -headerViewdHeight && firstVisiablePosition == 0) {System.out.println(currentState + "");//當(dāng)前頭布局完全顯示，為松開(kāi)刷新?tīng)顟B(tài),下拉刷新變成松開(kāi)刷新的時(shí)候if (paddingTop > 0 && currentState == DOWN_PULL) {System.out.println("松開(kāi)刷新");currentState = RELEASE_REFRESH;switchViewOnStateChange();//當(dāng)前頭布局補(bǔ)完全顯示，為下拉刷新?tīng)顟B(tài),松開(kāi)刷新變成下拉刷新的時(shí)候} else if ((paddingTop < 0 && currentState == RELEASE_REFRESH)) {System.out.println("下拉刷新");currentState = DOWN_PULL;switchViewOnStateChange();}// System.out.println("paddingTop = "+ paddingTop);headerView.setPadding(0, paddingTop, 0, 0);return true;//自己處理觸摸事件}// break;case MotionEvent.ACTION_UP:if (currentState == DOWN_PULL) {//當(dāng)前狀態(tài)為下拉刷新，隱藏頭布局headerView.setPadding(0, -headerViewdHeight, 0, 0);} else if (currentState == RELEASE_REFRESH) {//當(dāng)前狀態(tài)為松開(kāi)刷新,改變狀態(tài)currentState = REFRESHING;switchViewOnStateChange();if (mOnRefreshListener != null) {//正在刷新時(shí)，調(diào)用回調(diào)方法mOnRefreshListener.onFresh();}}break;default:break;}return super.onTouchEvent(ev); //listview 自己處理觸摸事件，}//根據(jù)當(dāng)前的狀態(tài)來(lái)改變頭布局的內(nèi)容private void switchViewOnStateChange() {switch (currentState) {case DOWN_PULL://下拉刷新header_iv.startAnimation(downAnimation);tv_state.setText("下拉刷新");break;case RELEASE_REFRESH://松開(kāi)刷新header_iv.startAnimation(upAnimation);tv_state.setText("松開(kāi)刷新");break;case REFRESHING://正在刷新header_iv.clearAnimation();header_iv.setVisibility(View.INVISIBLE);header_pb.setVisibility(View.VISIBLE);tv_state.setText("正在刷新...");headerView.setPadding(0, 0, 0, 0);break;default:break;}}public void setOnRefreshListener(OnRefreshListener listener) {this.mOnRefreshListener = listener;}//刷新的回調(diào)接口public interface OnRefreshListener {//下拉刷新回調(diào)方法void onFresh();//加載更多的回調(diào)方法void onLoadMore();}//當(dāng)刷新完畢過(guò)后，調(diào)用的回調(diào)方法public void onFinish() {if (isLoadingMore) {//加載更多//隱藏腳布局footerView.setPadding(0, -footerViewHeight, 0, 0);//改變狀態(tài)isLoadingMore = false;} else {//加載更多//箭頭圖片顯示header_iv.setVisibility(View.VISIBLE);//進(jìn)度圈隱藏header_pb.setVisibility(View.INVISIBLE);//文字狀態(tài)改變tv_state.setText("下拉刷新");//頭布局隱藏headerView.setPadding(0, -headerViewdHeight, 0, 0);//狀態(tài)值改變currentState = DOWN_PULL;//修改更新時(shí)間tv_time.setText("最近刷新時(shí)間： " + getTime());}}//獲取當(dāng)前刷新后的時(shí)間private String getTime() {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return sdf.format(new Date());}//當(dāng)滾動(dòng)發(fā)生改變時(shí)，調(diào)用該方法// OnScrollListener.SCROLL_STATE_FLING;2 手指用力滑動(dòng)一下，離開(kāi)屏幕，listview 有一個(gè)慣性的滑動(dòng)狀態(tài)// OnScrollListener.SCROLL_STATE_IDLE;0 listview 列表處于停滯狀態(tài)，手指沒(méi)有觸摸屏幕// OnScrollListener.SCROLL_STATE_TOUCH_SCROLL;1 手指觸摸著屏幕，上下滑動(dòng)的狀態(tài)@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {System.out.println("scrollState" + scrollState);//手指離開(kāi)屏幕，并且列表顯示到最后一條數(shù)據(jù)的時(shí)候int lastVisiablePosition = getLastVisiblePosition();if (scrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL && lastVisiablePosition== (getCount() - 1) && !isLoadingMore) {System.out.println("加載更多");isLoadingMore = true;footerView.setPadding(0, 0, 0, 0);setSelection(getCount() - 1);if (mOnRefreshListener != null) {mOnRefreshListener.onLoadMore();}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {}}

RecyclerView

public class LRecyclerView extends RecyclerView {private boolean pullRefreshEnabled = true;private OnRefreshListener mRefreshListener;private OnLoadMoreListener mLoadMoreListener;private LScrollListener mLScrollListener;private ArrowRefreshHeader mRefreshHeader;private View mEmptyView;private View mFootView;private int mRefreshProgressStyle = ProgressStyle.SysProgress;private final RecyclerView.AdapterDataObserver mDataObserver = new DataObserver();private float mLastY = -1;private static final float DRAG_RATE = 2.2f;private LRecyclerViewAdapter mWrapAdapter;private boolean isNoMore = false;private int mRefreshHeaderHeight;//scroll variables beginprotected LayoutManagerType layoutManagerType;//當(dāng)前RecyclerView類(lèi)型private int[] lastPositions;//最后一個(gè)的位置private int lastVisibleItemPosition;//最后一個(gè)可見(jiàn)的item的位置private int currentScrollState = 0;//當(dāng)前滑動(dòng)的狀態(tài)/*** 觸發(fā)在上下滑動(dòng)監(jiān)聽(tīng)器的容差距離*/private static final int HIDE_THRESHOLD = 20;/*** 滑動(dòng)的距離*/private int mDistance = 0;/*** 是否需要監(jiān)聽(tīng)控制*/private boolean mIsScrollDown = true;/*** Y軸移動(dòng)的實(shí)際距離（最頂部為0）*/private int mScrolledYDistance = 0;/*** X軸移動(dòng)的實(shí)際距離（最左側(cè)為0）*/private int mScrolledXDistance = 0;//scroll variables endprivate AppBarStateChangeListener.State appbarState = AppBarStateChangeListener.State.EXPANDED;public LRecyclerView(Context context) {this(context, null);}public LRecyclerView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public LRecyclerView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}private void init() {//下拉刷新布局mRefreshHeader = new ArrowRefreshHeader(getContext());//設(shè)置下拉刷新的樣式mRefreshHeader.setProgressStyle(mRefreshProgressStyle);}//腳布局，加載更多等LoadingFooter footView = new LoadingFooter(getContext());mFootView = footView;mFootView.setVisibility(GONE);//隱藏腳布局}@Overridepublic void setAdapter(Adapter adapter) {mWrapAdapter = (LRecyclerViewAdapter) adapter;super.setAdapter(mWrapAdapter);mWrapAdapter.getInnerAdapter().registerAdapterDataObserver(mDataObserver);mDataObserver.onChanged();//設(shè)置下拉刷新和加載更多mWrapAdapter.setRefreshHeader(mRefreshHeader);mWrapAdapter.addFooterView(mFootView);}private class DataObserver extends RecyclerView.AdapterDataObserver {@Overridepublic void onChanged() {Adapter<?> adapter = getAdapter();if (adapter instanceof LRecyclerViewAdapter) {LRecyclerViewAdapter lRecyclerViewAdapter = (LRecyclerViewAdapter) adapter;if (lRecyclerViewAdapter.getInnerAdapter() != null && mEmptyView != null) {int count = lRecyclerViewAdapter.getInnerAdapter().getItemCount();Log.e("lzx","count " + count);if (count == 0) {mEmptyView.setVisibility(View.VISIBLE);LRecyclerView.this.setVisibility(View.GONE);} else {mEmptyView.setVisibility(View.GONE);LRecyclerView.this.setVisibility(View.VISIBLE);}}} else {if (adapter != null && mEmptyView != null) {if (adapter.getItemCount() == 0) {mEmptyView.setVisibility(View.VISIBLE);LRecyclerView.this.setVisibility(View.GONE);} else {mEmptyView.setVisibility(View.GONE);LRecyclerView.this.setVisibility(View.VISIBLE);}}}if (mWrapAdapter != null) {mWrapAdapter.notifyDataSetChanged();}}@Overridepublic void onItemRangeChanged(int positionStart, int itemCount) {mWrapAdapter.notifyItemRangeChanged(positionStart + mWrapAdapter.getHeaderViewsCount() + 1, itemCount);}@Overridepublic void onItemRangeInserted(int positionStart, int itemCount) {mWrapAdapter.notifyItemRangeInserted(positionStart + mWrapAdapter.getHeaderViewsCount() + 1, itemCount);}@Overridepublic void onItemRangeRemoved(int positionStart, int itemCount) {mWrapAdapter.notifyItemRangeRemoved(positionStart + mWrapAdapter.getHeaderViewsCount() + 1, itemCount);}@Overridepublic void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {int headerViewsCountCount = mWrapAdapter.getHeaderViewsCount();mWrapAdapter.notifyItemRangeChanged(fromPosition + headerViewsCountCount + 1, toPosition + headerViewsCountCount + 1 + itemCount);}}@Overridepublic boolean onTouchEvent(MotionEvent ev) {if (mLastY == -1) {mLastY = ev.getRawY();}switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:mLastY = ev.getRawY();break;case MotionEvent.ACTION_MOVE:final float deltaY = ev.getRawY() - mLastY;mLastY = ev.getRawY();if (isOnTop() && pullRefreshEnabled && (appbarState == AppBarStateChangeListener.State.EXPANDED)) {mRefreshHeader.onMove(deltaY / DRAG_RATE);if (mRefreshHeader.getVisibleHeight() > 0 && mRefreshHeader.getState() < ArrowRefreshHeader.STATE_REFRESHING) {return false;}}break;default:mLastY = -1; // resetif (isOnTop() && pullRefreshEnabled && appbarState == AppBarStateChangeListener.State.EXPANDED) {if (mRefreshHeader.releaseAction()) {if (mRefreshListener != null) {mRefreshListener.onRefresh();}}}break;}return super.onTouchEvent(ev);}private int findMax(int[] lastPositions) {int max = lastPositions[0];for (int value : lastPositions) {if (value > max) {max = value;}}return max;}private int findMin(int[] firstPositions) {int min = firstPositions[0];for (int value : firstPositions) {if (value < min) {min = value;}}return min;}private boolean isOnTop() {if (pullRefreshEnabled && mRefreshHeader.getParent() != null) {return true;} else {return false;}}/*** set view when no content item** @param emptyView visiable view when items is empty*/public void setEmptyView(View emptyView) {this.mEmptyView = emptyView;mDataObserver.onChanged();}public void refreshComplete() {mRefreshHeader.refreshComplete();setNoMore(false);}public void setNoMore(boolean noMore){isNoMore = noMore;}public void setRefreshHeader(BaseRefreshHeader refreshHeader) {mRefreshHeader = (ArrowRefreshHeader) refreshHeader;}public void setPullRefreshEnabled(boolean enabled) {pullRefreshEnabled = enabled;}public void setRefreshProgressStyle(int style) {if (mRefreshHeader != null) {mRefreshHeader.setProgressStyle(style);}}public void setArrowImageView(int resId) {if (mRefreshHeader != null) {mRefreshHeader.setArrowImageView(resId);}}public void setOnRefreshListener(OnRefreshListener listener) {mRefreshListener = listener;}public void setOnLoadMoreListener(OnLoadMoreListener listener) {mLoadMoreListener = listener;}public void setLScrollListener(LScrollListener listener) {mLScrollListener = listener;}public interface LScrollListener {void onScrollUp();//scroll down to upvoid onScrollDown();//scroll from up to downvoid onScrolled(int distanceX, int distanceY);// moving state,you can get the move distancevoid onScrollStateChanged(int state);}public void setRefreshing(boolean refreshing) {if (refreshing && pullRefreshEnabled && mRefreshListener != null) {mRefreshHeader.setState(ArrowRefreshHeader.STATE_REFRESHING);mRefreshHeaderHeight = mRefreshHeader.getMeasuredHeight();mRefreshHeader.onMove(mRefreshHeaderHeight);mRefreshListener.onRefresh();}}public void forceToRefresh() {LoadingFooter.State state = RecyclerViewStateUtils.getFooterViewState(this);if(state == LoadingFooter.State.Loading) {return;}if (pullRefreshEnabled && mRefreshListener != null) {scrollToPosition(0);mRefreshHeader.setState(ArrowRefreshHeader.STATE_REFRESHING);mRefreshHeader.onMove(mRefreshHeaderHeight);mRefreshListener.onRefresh();}}@Overridepublic void onScrolled(int dx, int dy) {super.onScrolled(dx, dy);int firstVisibleItemPosition = 0;RecyclerView.LayoutManager layoutManager = getLayoutManager();if (layoutManagerType == null) {if (layoutManager instanceof LinearLayoutManager) {layoutManagerType = LayoutManagerType.LinearLayout;} else if (layoutManager instanceof GridLayoutManager) {layoutManagerType = LayoutManagerType.GridLayout;} else if (layoutManager instanceof StaggeredGridLayoutManager) {layoutManagerType = LayoutManagerType.StaggeredGridLayout;} else {throw new RuntimeException("Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");}}switch (layoutManagerType) {case LinearLayout:firstVisibleItemPosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();break;case GridLayout:firstVisibleItemPosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();break;case StaggeredGridLayout:StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;if (lastPositions == null) {lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];}staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);lastVisibleItemPosition = findMax(lastPositions);staggeredGridLayoutManager.findFirstCompletelyVisibleItemPositions(lastPositions);firstVisibleItemPosition = findMax(lastPositions);break;}// 根據(jù)類(lèi)型來(lái)計(jì)算出第一個(gè)可見(jiàn)的item的位置，由此判斷是否觸發(fā)到底部的監(jiān)聽(tīng)器// 計(jì)算并判斷當(dāng)前是向上滑動(dòng)還是向下滑動(dòng)calculateScrollUpOrDown(firstVisibleItemPosition, dy);// 移動(dòng)距離超過(guò)一定的范圍，我們監(jiān)聽(tīng)就沒(méi)有啥實(shí)際的意義了mScrolledXDistance += dx;mScrolledYDistance += dy;mScrolledXDistance = (mScrolledXDistance < 0) ? 0 : mScrolledXDistance;mScrolledYDistance = (mScrolledYDistance < 0) ? 0 : mScrolledYDistance;if (mIsScrollDown && (dy == 0)) {mScrolledYDistance = 0;}//Be careful in hereif (null != mLScrollListener) {mLScrollListener.onScrolled(mScrolledXDistance, mScrolledYDistance);}}@Overridepublic void onScrollStateChanged(int state) {super.onScrollStateChanged(state);currentScrollState = state;if (mLScrollListener != null) {mLScrollListener.onScrollStateChanged(state);}if (mLoadMoreListener != null) {if (currentScrollState == RecyclerView.SCROLL_STATE_IDLE) {RecyclerView.LayoutManager layoutManager = getLayoutManager();int visibleItemCount = layoutManager.getChildCount();int totalItemCount = layoutManager.getItemCount();if (visibleItemCount > 0&& lastVisibleItemPosition >= totalItemCount - 1&& totalItemCount > visibleItemCount&& !isNoMore//&& !mIsScrollDown&& mRefreshHeader.getState() != ArrowRefreshHeader.STATE_REFRESHING) {mLoadMoreListener.onLoadMore();}}}}/*** 計(jì)算當(dāng)前是向上滑動(dòng)還是向下滑動(dòng)*/private void calculateScrollUpOrDown(int firstVisibleItemPosition, int dy) {if (null != mLScrollListener) {if (firstVisibleItemPosition == 0) {if (!mIsScrollDown) {mIsScrollDown = true;mLScrollListener.onScrollDown();}} else {if (mDistance > HIDE_THRESHOLD && mIsScrollDown) {mIsScrollDown = false;mLScrollListener.onScrollUp();mDistance = 0;} else if (mDistance < -HIDE_THRESHOLD && !mIsScrollDown) {mIsScrollDown = true;mLScrollListener.onScrollDown();mDistance = 0;}}}if ((mIsScrollDown && dy > 0) || (!mIsScrollDown && dy < 0)) {mDistance += dy;}}public enum LayoutManagerType {LinearLayout,StaggeredGridLayout,GridLayout}@Overrideprotected void onAttachedToWindow() {super.onAttachedToWindow();//解決LRecyclerView與CollapsingToolbarLayout滑動(dòng)沖突的問(wèn)題AppBarLayout appBarLayout = null;ViewParent p = getParent();while (p != null) {if (p instanceof CoordinatorLayout) {break;}p = p.getParent();}if(p instanceof CoordinatorLayout) {CoordinatorLayout coordinatorLayout = (CoordinatorLayout)p;final int childCount = coordinatorLayout.getChildCount();for (int i = childCount - 1; i >= 0; i--) {final View child = coordinatorLayout.getChildAt(i);if(child instanceof AppBarLayout) {appBarLayout = (AppBarLayout)child;break;}}if(appBarLayout != null) {appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {@Overridepublic void onStateChanged(AppBarLayout appBarLayout, State state) {appbarState = state;}});}}}}

Adapter

public class LRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {private static final int TYPE_REFRESH_HEADER = 10000;private static final int TYPE_NORMAL = 0;private static final int TYPE_FOOTER_VIEW = 10001;private static final int HEADER_INIT_INDEX = 10002;private static List<Integer> mHeaderTypes = new ArrayList<>();private ArrowRefreshHeader mRefreshHeader;private OnItemClickListener mOnItemClickListener;private OnItemLongClickListener mOnItemLongClickListener;/*** RecyclerView使用的，真正的Adapter*/private RecyclerView.Adapter mInnerAdapter;private ArrayList<View> mHeaderViews = new ArrayList<>();private ArrayList<View> mFooterViews = new ArrayList<>();public LRecyclerViewAdapter(RecyclerView.Adapter innerAdapter) {this.mInnerAdapter = innerAdapter;}public void setRefreshHeader(ArrowRefreshHeader refreshHeader){mRefreshHeader = refreshHeader;}public RecyclerView.Adapter getInnerAdapter() {return mInnerAdapter;}public void addHeaderView(View view) {if (view == null) {throw new RuntimeException("header is null");}mHeaderTypes.add(HEADER_INIT_INDEX + mHeaderViews.size());mHeaderViews.add(view);}public void addFooterView(View view) {if (view == null) {throw new RuntimeException("footer is null");}if (getFooterViewsCount() > 0) {removeFooterView(getFooterView());}mFooterViews.add(view);//this.notifyDataSetChanged();}/*** 根據(jù)header的ViewType判斷是哪個(gè)header* @param itemType* @return*/private View getHeaderViewByType(int itemType) {if(!isHeaderType(itemType)) {return null;}return mHeaderViews.get(itemType - HEADER_INIT_INDEX);}/*** 判斷一個(gè)type是否為HeaderType* @param itemViewType* @return*/private boolean isHeaderType(int itemViewType) {return mHeaderViews.size() > 0 && mHeaderTypes.contains(itemViewType);}/*** 返回第一個(gè)FootView* @return*/public View getFooterView() {return getFooterViewsCount()>0 ? mFooterViews.get(0) : null;}/*** 返回第一個(gè)HeaderView* @return*/public View getHeaderView() {return getHeaderViewsCount()>0 ? mHeaderViews.get(0) : null;}public ArrayList<View> getHeaderViews() {return mHeaderViews;}public void removeHeaderView(View view) {mHeaderViews.remove(view);this.notifyDataSetChanged();}public void removeFooterView(View view) {mFooterViews.remove(view);this.notifyDataSetChanged();}public int getHeaderViewsCount() {return mHeaderViews.size();}public int getFooterViewsCount() {return mFooterViews.size();}public boolean isHeader(int position) {return position >= 1 && position < mHeaderViews.size() + 1;}public boolean isRefreshHeader(int position) {return position == 0;}public boolean isFooter(int position) {int lastPosition = getItemCount() - getFooterViewsCount();return getFooterViewsCount() > 0 && position >= lastPosition;}@Overridepublic RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {if (viewType == TYPE_REFRESH_HEADER) {return new ViewHolder(mRefreshHeader);} else if (isHeaderType(viewType)) {return new ViewHolder(getHeaderViewByType(viewType));} else if (viewType == TYPE_FOOTER_VIEW) {return new ViewHolder(mFooterViews.get(0));}return mInnerAdapter.onCreateViewHolder(parent, viewType);}@Overridepublic void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {if (isHeader(position) || isRefreshHeader(position)) {return;}final int adjPosition = position - (getHeaderViewsCount() + 1);int adapterCount;if (mInnerAdapter != null) {adapterCount = mInnerAdapter.getItemCount();if (adjPosition < adapterCount) {mInnerAdapter.onBindViewHolder(holder, adjPosition);if (mOnItemClickListener != null) {holder.itemView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v){mOnItemClickListener.onItemClick(holder.itemView, adjPosition);}});}if (mOnItemLongClickListener != null) {holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {@Overridepublic boolean onLongClick(View v){mOnItemLongClickListener.onItemLongClick(holder.itemView, adjPosition);return true;}});}}}}@Overridepublic void onBindViewHolder(final RecyclerView.ViewHolder holder, int position, List<Object> payloads) {if (payloads.isEmpty()) {onBindViewHolder(holder,position);} else {if (isHeader(position) || isRefreshHeader(position)) {return;}final int adjPosition = position - (getHeaderViewsCount() + 1);int adapterCount;if (mInnerAdapter != null) {adapterCount = mInnerAdapter.getItemCount();if (adjPosition < adapterCount) {mInnerAdapter.onBindViewHolder(holder, adjPosition, payloads);}}}}@Overridepublic int getItemCount() {if (mInnerAdapter != null) {return getHeaderViewsCount() + getFooterViewsCount() + mInnerAdapter.getItemCount() + 1;} else {return getHeaderViewsCount() + getFooterViewsCount() + 1;}}@Overridepublic int getItemViewType(int position) {int adjPosition = position - (getHeaderViewsCount() + 1);if (isRefreshHeader(position)) {return TYPE_REFRESH_HEADER;}if (isHeader(position)) {position = position - 1;return mHeaderTypes.get(position);}if (isFooter(position)) {return TYPE_FOOTER_VIEW;}int adapterCount;if (mInnerAdapter != null) {adapterCount = mInnerAdapter.getItemCount();if (adjPosition < adapterCount) {return mInnerAdapter.getItemViewType(adjPosition);}}return TYPE_NORMAL;}@Overridepublic long getItemId(int position) {if (mInnerAdapter != null && position >= getHeaderViewsCount()) {int adjPosition = position - getHeaderViewsCount();int adapterCount = mInnerAdapter.getItemCount();if (adjPosition < adapterCount) {return mInnerAdapter.getItemId(adjPosition);}}return -1;}@Overridepublic void onAttachedToRecyclerView(RecyclerView recyclerView) {super.onAttachedToRecyclerView(recyclerView);RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();if (manager instanceof GridLayoutManager) {final GridLayoutManager gridManager = ((GridLayoutManager) manager);gridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {@Overridepublic int getSpanSize(int position) {return (isHeader(position) || isFooter(position) || isRefreshHeader(position))? gridManager.getSpanCount() : 1;}});}mInnerAdapter.onAttachedToRecyclerView(recyclerView);}@Overridepublic void onDetachedFromRecyclerView(RecyclerView recyclerView) {mInnerAdapter.onDetachedFromRecyclerView(recyclerView);}@Overridepublic void onViewAttachedToWindow(RecyclerView.ViewHolder holder) {super.onViewAttachedToWindow(holder);ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();if (lp != null && lp instanceof StaggeredGridLayoutManager.LayoutParams) {if(isHeader(holder.getLayoutPosition()) ||isRefreshHeader(holder.getLayoutPosition()) || isFooter(holder.getLayoutPosition())) {StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;p.setFullSpan(true);}}mInnerAdapter.onViewAttachedToWindow(holder);}@Overridepublic void onViewDetachedFromWindow(RecyclerView.ViewHolder holder) {mInnerAdapter.onViewDetachedFromWindow(holder);}@Overridepublic void onViewRecycled(RecyclerView.ViewHolder holder) {mInnerAdapter.onViewRecycled(holder);}public static class ViewHolder extends RecyclerView.ViewHolder {public ViewHolder(View itemView) {super(itemView);}}/**** @param isCallback whether position is from callback interface* @param position* @return*/public int getAdapterPosition(boolean isCallback, int position) {if(isCallback) {int adjPosition = position - (getHeaderViewsCount() + 1);int adapterCount = mInnerAdapter.getItemCount();if (adjPosition < adapterCount) {return adjPosition;}}else {return (position + getHeaderViewsCount()) + 1;}return -1;}public void setOnItemClickListener(OnItemClickListener itemClickListener){this.mOnItemClickListener = itemClickListener;}public void setOnItemLongClickListener(OnItemLongClickListener itemLongClickListener){this.mOnItemLongClickListener = itemLongClickListener;}}

RecyclerViewStateUtils

public class RecyclerViewStateUtils {/*** 設(shè)置LRecyclerViewAdapter的FooterView State** @param instance context* @param recyclerView recyclerView* @param pageSize 分頁(yè)展示時(shí)，recyclerView每一頁(yè)的數(shù)量* @param state FooterView State* @param errorListener FooterView處于Error狀態(tài)時(shí)的點(diǎn)擊事件*/public static void setFooterViewState(Activity instance, RecyclerView recyclerView, int pageSize, LoadingFooter.State state, View.OnClickListener errorListener) {if(instance==null || instance.isFinishing()) {return;}RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();if (outerAdapter == null || !(outerAdapter instanceof LRecyclerViewAdapter)) {return;}LRecyclerViewAdapter lRecyclerViewAdapter = (LRecyclerViewAdapter) outerAdapter;//只有一頁(yè)的時(shí)候，就別加什么FooterView了if (lRecyclerViewAdapter.getInnerAdapter().getItemCount() < pageSize) {return;}LoadingFooter footerView;//已經(jīng)有footerView了if (lRecyclerViewAdapter.getFooterViewsCount() > 0) {footerView = (LoadingFooter)lRecyclerViewAdapter.getFooterView();footerView.setState(state);footerView.setVisibility(View.VISIBLE);if (state == LoadingFooter.State.NetWorkError) {footerView.setOnClickListener(errorListener);} else if (state == LoadingFooter.State.TheEnd){((LRecyclerView)recyclerView).setNoMore(true);}}recyclerView.scrollToPosition(lRecyclerViewAdapter.getItemCount() - 1);}/*** 設(shè)置LRecyclerViewAdapter的FooterView State** @param instance context* @param recyclerView recyclerView* @param pageSize 分頁(yè)展示時(shí)，recyclerView每一頁(yè)的數(shù)量* @param state FooterView State* @param errorListener FooterView處于Error狀態(tài)時(shí)的點(diǎn)擊事件*/public static void setFooterViewState2(Activity instance, RecyclerView recyclerView, int pageSize, LoadingFooter.State state, View.OnClickListener errorListener) {if(instance==null || instance.isFinishing()) {return;}RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();if (outerAdapter == null || !(outerAdapter instanceof LRecyclerViewAdapter)) {return;}LRecyclerViewAdapter lRecyclerViewAdapter = (LRecyclerViewAdapter) outerAdapter;LoadingFooter footerView;//已經(jīng)有footerView了if (lRecyclerViewAdapter.getFooterViewsCount() > 0) {footerView = (LoadingFooter) lRecyclerViewAdapter.getFooterView();footerView.setState(state);if (state == LoadingFooter.State.NetWorkError) {footerView.setOnClickListener(errorListener);}recyclerView.scrollToPosition(0);} else {footerView = new LoadingFooter(instance);footerView.setState(state);if (state == LoadingFooter.State.NetWorkError) {footerView.setOnClickListener(errorListener);}lRecyclerViewAdapter.addFooterView(footerView);recyclerView.scrollToPosition(0);}}/*** 獲取當(dāng)前RecyclerView.FooterView的狀態(tài)** @param recyclerView*/public static LoadingFooter.State getFooterViewState(RecyclerView recyclerView) {RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();if (outerAdapter != null && outerAdapter instanceof LRecyclerViewAdapter) {if (((LRecyclerViewAdapter) outerAdapter).getFooterViewsCount() > 0) {LoadingFooter footerView = (LoadingFooter) ((LRecyclerViewAdapter) outerAdapter).getFooterView();return footerView.getState();}}return LoadingFooter.State.Normal;}/*** 設(shè)置當(dāng)前RecyclerView.FooterView的狀態(tài)** @param recyclerView* @param state*/public static void setFooterViewState(RecyclerView recyclerView, LoadingFooter.State state) {RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();if (outerAdapter != null && outerAdapter instanceof LRecyclerViewAdapter) {if (((LRecyclerViewAdapter) outerAdapter).getFooterViewsCount() > 0) {LoadingFooter footerView = (LoadingFooter) ((LRecyclerViewAdapter) outerAdapter).getFooterView();footerView.setState(state);}}} } public class BooheeListView extends ListView implements OnScrollListener {private boolean isLastStatus;private OnLoadMoreListener mListener;public interface OnLoadMoreListener {void onLoadMore();}public BooheeListView(Context context, AttributeSet attrs) {super(context, attrs);setOnScrollListener(this);}public void setOnLoadMoreListener(OnLoadMoreListener listener) {this.mListener = listener;}public void onScrollStateChanged(AbsListView view, int scrollState) {}public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {if (firstVisibleItem + visibleItemCount != totalItemCount || totalItemCount <= 0) {this.isLastStatus = false;return;}loadMore();this.isLastStatus = true;}private void loadMore() {if (this.mListener != null && !this.isLastStatus) {this.mListener.onLoadMore();}} }

總結(jié)

以上是生活随笔為你收集整理的自定义控件：下拉刷新的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。