package com.qq.view;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;import com.example.qq.R;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.animation.Interpolator;import android.view.animation.LinearInterpolator;import android.view.animation.RotateAnimation;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;/** * ListView下拉刷新和加載更多
*
默認(rèn)如果設(shè)置了OnRefreshListener接口和OnLoadMoreListener接口，
并且不為null，則打開這兩個功能了。 *
mIsAutoLoadMore(是否自動加載更多)和
*
* @date 2013-11-11 下午10:09:26
* @change congcong
* @mail fchentianlong@sohu.com
* @version 1.0
*/
public class CustomListView extends ListView implements OnScrollListener {
/**? 顯示格式化日期模板? */
private final static String DATE_FORMAT_STR = "yyyy年MM月dd日 HH:mm";
/**? 實(shí)際的padding的距離與界面上偏移距離的比例? */
private final static int RATIO = 3;
private final static int RELEASE_TO_REFRESH = 0;
private final static int PULL_TO_REFRESH = 1;
private final static int REFRESHING = 2;
private final static int DONE = 3;
private final static int LOADING = 4;
/**? 加載中? */
private final static int ENDINT_LOADING = 1;
/**? 手動完成刷新? */
private final static int ENDINT_MANUAL_LOAD_DONE = 2;
/**? 自動完成刷新? */
private final static int ENDINT_AUTO_LOAD_DONE = 3;
/**? ? 0:RELEASE_TO_REFRESH;
*
1:PULL_To_REFRESH;
*
2:REFRESHING;
*
3:DONE;
*
4:LOADING */
private int mHeadState;
/**? ? 0:完成/等待刷新 ;
*
1:加載中? */
private int mEndState;
/**? 可以加載更多？? */
private boolean mCanLoadMore = true;
/**? 可以下拉刷新？? */
private boolean mCanRefresh = true;
/**
*? 可以自動加載更多嗎？（注意，先判斷是否有加載更多，如果沒有，這個flag也沒有意義）?
**/
private boolean mIsAutoLoadMore = true;
public boolean isAutoLoadMore() {
return mIsAutoLoadMore;
}
public void setAutoLoadMore(boolean pIsAutoLoadMore) {
mIsAutoLoadMore = pIsAutoLoadMore;
}
private LayoutInflater mInflater;
private View mHeadView;
private TextView mTipsTextView;
private TextView mLastUpdatedTextView;
private ImageView mArrowImageView;
private ProgressBar mProgressBar;
private View mEndRootView;
private ProgressBar mEndLoadProgressBar;
private TextView mEndLoadTipsTextView;
/**? headView動畫? */
private RotateAnimation mArrowAnim;
/**? headView反轉(zhuǎn)動畫? */
private RotateAnimation mArrowReverseAnim;
/** 用于保證startY的值在一個完整的touch事件中只被記錄一次? ? */
private boolean mIsRecored;
private int mHeadViewWidth;
private int mHeadViewHeight;
private int mStartY;
private boolean mIsBack;
private int mFirstItemIndex;
private int mLastItemIndex;
private int mCount;
private boolean mEnoughCount;//足夠數(shù)量充滿屏幕？
private OnRefreshListener mRefreshListener;
private OnLoadMoreListener mLoadMoreListener;
public CustomListView(Context pContext, AttributeSet pAttrs) {
super(pContext, pAttrs);
init(pContext);
}
public CustomListView(Context pContext) {
super(pContext);
init(pContext);
}
public CustomListView(Context pContext, AttributeSet pAttrs, int pDefStyle) {
super(pContext, pAttrs, pDefStyle);
init(pContext);
}
/**
* 初始化操作
* @param pContext
*
*/
private void init(Context pContext) {
setCacheColorHint(pContext.getResources().getColor(R.color.transparent));
mInflater = LayoutInflater.from(pContext);
addHeadView();
setOnScrollListener(this);
initPullImageAnimation(0);
}
/**
* 添加下拉刷新的HeadView
*
*/
private void addHeadView() {
mHeadView = (LinearLayout) mInflater.inflate(R.layout.refresh_head, null);
mArrowImageView = (ImageView) mHeadView.findViewById(R.id.head_arrowImageView);
mArrowImageView.setMinimumWidth(70);
mArrowImageView.setMinimumHeight(50);
mProgressBar = (ProgressBar) mHeadView
.findViewById(R.id.head_progressBar);
mTipsTextView = (TextView) mHeadView.findViewById(
R.id.head_tipsTextView);
mLastUpdatedTextView = (TextView) mHeadView
.findViewById(R.id.head_lastUpdatedTextView);
measureView(mHeadView);
mHeadViewHeight = mHeadView.getMeasuredHeight();
mHeadViewWidth = mHeadView.getMeasuredWidth();
mHeadView.setPadding(0, -1 * mHeadViewHeight, 0, 0);
mHeadView.invalidate();
Log.v("size", "width:" + mHeadViewWidth + " height:"
+ mHeadViewHeight);
addHeaderView(mHeadView, null, false);
mHeadState = DONE;
}
/**
* 添加加載更多FootView
*
*/
private void addFooterView() {
mEndRootView = mInflater.inflate(R.layout.refresh_footer, null);
mEndRootView.setVisibility(View.VISIBLE);
mEndLoadProgressBar = (ProgressBar) mEndRootView
.findViewById(R.id.pull_to_refresh_progress);
mEndLoadTipsTextView = (TextView) mEndRootView.findViewById(R.id.load_more);
mEndRootView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mCanLoadMore){
if(mCanRefresh){
// 當(dāng)可以下拉刷新時，如果FootView沒有正在加載，并且HeadView沒有正在刷新，才可以點(diǎn)擊加載更多。
if(mEndState != ENDINT_LOADING && mHeadState != REFRESHING){
mEndState = ENDINT_LOADING;
onLoadMore();
}
}else if(mEndState != ENDINT_LOADING){
// 當(dāng)不能下拉刷新時，F(xiàn)ootView不正在加載時，才可以點(diǎn)擊加載更多。
mEndState = ENDINT_LOADING;
onLoadMore();
}
}
}
});
addFooterView(mEndRootView);
if(mIsAutoLoadMore){
mEndState = ENDINT_AUTO_LOAD_DONE;
}else{
mEndState = ENDINT_MANUAL_LOAD_DONE;
}
}
/**
* 實(shí)例化下拉刷新的箭頭的動畫效果
* @param pAnimDuration 動畫運(yùn)行時長
*
*/
private void initPullImageAnimation(final int pAnimDuration) {
int _Duration;
if(pAnimDuration > 0){
_Duration = pAnimDuration;
}else{
_Duration = 250;
}
Interpolator _Interpolator = new LinearInterpolator();
mArrowAnim = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
mArrowAnim.setInterpolator(_Interpolator);
mArrowAnim.setDuration(_Duration);
mArrowAnim.setFillAfter(true);
mArrowReverseAnim = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
mArrowReverseAnim.setInterpolator(_Interpolator);
mArrowReverseAnim.setDuration(_Duration);
mArrowReverseAnim.setFillAfter(true);
}
/**
* 測量HeadView寬高(注意：此方法僅適用于LinearLayout，請讀者自己測試驗(yàn)證。)
*
*/
private void measureView(View pChild) {
ViewGroup.LayoutParams p = pChild.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int lpHeight = p.height;
int childHeightSpec;
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
pChild.measure(childWidthSpec, childHeightSpec);
}
/**
*為了判斷滑動到ListView底部沒
*/
@Override
public void onScroll(AbsListView pView, int pFirstVisibleItem,
int pVisibleItemCount, int pTotalItemCount) {
mFirstItemIndex = pFirstVisibleItem;
mLastItemIndex = pFirstVisibleItem + pVisibleItemCount - 2;
mCount = pTotalItemCount - 2;
if (pTotalItemCount > pVisibleItemCount ) {
mEnoughCount = true;
} else {
mEnoughCount = false;
}
}
/**
*這個方法，可能有點(diǎn)亂，大家多讀幾遍就明白了。
*/
@Override
public void onScrollStateChanged(AbsListView pView, int pScrollState) {
if(mCanLoadMore){// 存在加載更多功能
if (mLastItemIndex ==? mCount && pScrollState == SCROLL_STATE_IDLE) {
//SCROLL_STATE_IDLE=0，滑動停止
if (mEndState != ENDINT_LOADING) {
if(mIsAutoLoadMore){// 自動加載更多，我們讓FootView顯示 “更? ? 多”
if(mCanRefresh){
// 存在下拉刷新并且HeadView沒有正在刷新時，F(xiàn)ootView可以自動加載更多。
if(mHeadState != REFRESHING){
// FootView顯示 : 更? ? 多? ---> 加載中...
mEndState = ENDINT_LOADING;
onLoadMore();
changeEndViewByState();
}
}else{// 沒有下拉刷新，我們直接進(jìn)行加載更多。
// FootView顯示 : 更? ? 多? ---> 加載中...
mEndState = ENDINT_LOADING;
onLoadMore();
changeEndViewByState();
}
}else{// 不是自動加載更多，我們讓FootView顯示 “點(diǎn)擊加載”
// FootView顯示 : 點(diǎn)擊加載? ---> 加載中...
mEndState = ENDINT_MANUAL_LOAD_DONE;
changeEndViewByState();
}
}
}
}else if(mEndRootView != null && mEndRootView.getVisibility() == VISIBLE){
// 突然關(guān)閉加載更多功能之后，我們要移除FootView。
System.out.println("this.removeFooterView(endRootView);...");
mEndRootView.setVisibility(View.GONE);
this.removeFooterView(mEndRootView);
}
}
/**
* 改變加載更多狀態(tài)
* @date 2013-11-11 下午10:05:27
*
*/
private void? changeEndViewByState() {
if (mCanLoadMore) {
//允許加載更多
switch (mEndState) {
case ENDINT_LOADING://刷新中
// 加載中...
if(mEndLoadTipsTextView.getText().equals(
R.string.p2refresh_doing_end_refresh)){
break;
}
mEndLoadTipsTextView.setText(R.string.p2refresh_doing_end_refresh);
mEndLoadTipsTextView.setVisibility(View.VISIBLE);
mEndLoadProgressBar.setVisibility(View.VISIBLE);
break;
case ENDINT_MANUAL_LOAD_DONE:// 手動刷新完成
// 點(diǎn)擊加載
mEndLoadTipsTextView.setText(R.string.p2refresh_end_click_load_more);
mEndLoadTipsTextView.setVisibility(View.VISIBLE);
mEndLoadProgressBar.setVisibility(View.GONE);
mEndRootView.setVisibility(View.VISIBLE);
break;
case ENDINT_AUTO_LOAD_DONE:// 自動刷新完成
// 更? ? 多
mEndLoadTipsTextView.setText(R.string.p2refresh_end_load_more);
mEndLoadTipsTextView.setVisibility(View.VISIBLE);
mEndLoadProgressBar.setVisibility(View.GONE);
mEndRootView.setVisibility(View.VISIBLE);
break;
default:
break;
}
}
}
/**
*原作者的，我沒改動，請讀者自行優(yōu)化。
*/
public boolean onTouchEvent(MotionEvent event) {
if (mCanRefresh) {
if(mCanLoadMore && mEndState == ENDINT_LOADING){
// 如果存在加載更多功能，并且當(dāng)前正在加載更多，默認(rèn)不允許下拉刷新，必須加載完畢后才能使用。
return super.onTouchEvent(event);
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (mFirstItemIndex == 0 && !mIsRecored) {
mIsRecored = true;
mStartY = (int) event.getY();
}
break;
case MotionEvent.ACTION_UP:
if (mHeadState != REFRESHING && mHeadState != LOADING) {
if (mHeadState == DONE) {
}
if (mHeadState == PULL_TO_REFRESH) {
mHeadState = DONE;
changeHeaderViewByState();
}
if (mHeadState == RELEASE_TO_REFRESH) {
mHeadState = REFRESHING;
changeHeaderViewByState();
onRefresh();
}
}
mIsRecored = false;
mIsBack = false;
break;
case MotionEvent.ACTION_MOVE:
int tempY = (int) event.getY();
if (!mIsRecored && mFirstItemIndex == 0) {
mIsRecored = true;
mStartY = tempY;
}
if (mHeadState != REFRESHING && mIsRecored && mHeadState != LOADING) {
// 保證在設(shè)置padding的過程中，當(dāng)前的位置一直是在head，
// 否則如果當(dāng)列表超出屏幕的話，當(dāng)在上推的時候，列表會同時進(jìn)行滾動
// 可以松手去刷新了
if (mHeadState == RELEASE_TO_REFRESH) {
setSelection(0);
// 往上推了，推到了屏幕足夠掩蓋head的程度，但是還沒有推到全部掩蓋的地步
if (((tempY - mStartY) / RATIO < mHeadViewHeight)
&& (tempY - mStartY) > 0) {
mHeadState = PULL_TO_REFRESH;
changeHeaderViewByState();
}
// 一下子推到頂了
else if (tempY - mStartY <= 0) {
mHeadState = DONE;
changeHeaderViewByState();
}
// 往下拉了，或者還沒有上推到屏幕頂部掩蓋head的地步
}
// 還沒有到達(dá)顯示松開刷新的時候,DONE或者是PULL_To_REFRESH狀態(tài)
if (mHeadState == PULL_TO_REFRESH) {
setSelection(0);
// 下拉到可以進(jìn)入RELEASE_TO_REFRESH的狀態(tài)
if ((tempY - mStartY) / RATIO >= mHeadViewHeight) {
mHeadState = RELEASE_TO_REFRESH;
mIsBack = true;
changeHeaderViewByState();
} else if (tempY - mStartY <= 0) {
mHeadState = DONE;
changeHeaderViewByState();
}
}
if (mHeadState == DONE) {
if (tempY - mStartY > 0) {
mHeadState = PULL_TO_REFRESH;
changeHeaderViewByState();
}
}
if (mHeadState == PULL_TO_REFRESH) {
mHeadView.setPadding(0, -1 * mHeadViewHeight
+ (tempY - mStartY) / RATIO, 0, 0);
}
if (mHeadState == RELEASE_TO_REFRESH) {
mHeadView.setPadding(0, (tempY - mStartY) / RATIO
- mHeadViewHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
/**
* 當(dāng)HeadView狀態(tài)改變時候，調(diào)用該方法，以更新界面
*
*/
private void changeHeaderViewByState() {
switch (mHeadState) {
case RELEASE_TO_REFRESH:
mArrowImageView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.GONE);
mTipsTextView.setVisibility(View.VISIBLE);
mLastUpdatedTextView.setVisibility(View.VISIBLE);
mArrowImageView.clearAnimation();
mArrowImageView.startAnimation(mArrowAnim);
// 松開刷新
mTipsTextView.setText(R.string.p2refresh_release_refresh);
break;
case PULL_TO_REFRESH:
mProgressBar.setVisibility(View.GONE);
mTipsTextView.setVisibility(View.VISIBLE);
mLastUpdatedTextView.setVisibility(View.VISIBLE);
mArrowImageView.clearAnimation();
mArrowImageView.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH狀態(tài)轉(zhuǎn)變來的
if (mIsBack) {
mIsBack = false;
mArrowImageView.clearAnimation();
mArrowImageView.startAnimation(mArrowReverseAnim);
// 下拉刷新
mTipsTextView.setText(R.string.p2refresh_pull_to_refresh);
} else {
// 下拉刷新
mTipsTextView.setText(R.string.p2refresh_pull_to_refresh);
}
break;
case REFRESHING:
mHeadView.setPadding(0, 0, 0, 0);
// 華生的建議： 實(shí)際上這個的setPadding可以用動畫來代替。我沒有試，但是我見過。其實(shí)有的人也用Scroller可以實(shí)現(xiàn)這個效果，
// 我沒時間研究了，后期再擴(kuò)展，這個工作交給小伙伴你們啦~ 如果改進(jìn)了記得發(fā)到我郵箱噢~
// 本人郵箱： xxzhaofeng5412@gmail.com
mProgressBar.setVisibility(View.VISIBLE);
mArrowImageView.clearAnimation();
mArrowImageView.setVisibility(View.GONE);
// 正在刷新...
mTipsTextView.setText(R.string.p2refresh_doing_head_refresh);
mLastUpdatedTextView.setVisibility(View.VISIBLE);
break;
case DONE:
mHeadView.setPadding(0, -1 * mHeadViewHeight+(-1), 0, 0);
// 此處可以改進(jìn)，同上所述。
mProgressBar.setVisibility(View.GONE);
mArrowImageView.clearAnimation();
mArrowImageView.setImageResource(R.drawable.refresh_arrow);
// 下拉刷新
mTipsTextView.setText(R.string.p2refresh_pull_to_refresh);
mLastUpdatedTextView.setVisibility(View.VISIBLE);
break;
}
}
/**
* 下拉刷新監(jiān)聽接口
*
*/
public interface OnRefreshListener {
public void onRefresh();
}
/**
* 加載更多監(jiān)聽接口
*
*/
public interface OnLoadMoreListener {
public void onLoadMore();
}
public void setOnRefreshListener(OnRefreshListener pRefreshListener) {
if(pRefreshListener != null){
mRefreshListener = pRefreshListener;
mCanRefresh = true;
}
}
public void setOnLoadListener(OnLoadMoreListener pLoadMoreListener) {
if(pLoadMoreListener != null){
mLoadMoreListener = pLoadMoreListener;
mCanLoadMore = true;
if(mCanLoadMore && getFooterViewsCount() == 0){
addFooterView();
}
}
}
/**
* 正在下拉刷新
*
*/
private void onRefresh() {
if (mRefreshListener != null) {
mRefreshListener.onRefresh();
}
}
/**
* 下拉刷新完成
*
*/
public void onRefreshComplete() {
// 下拉刷新后是否顯示第一條Item
//if(mIsMoveToFirstItemAfterRefresh)setSelection(0);
mHeadState = DONE;
// 最近更新: Time
mLastUpdatedTextView.setText(
getResources().getString(R.string.p2refresh_refresh_lasttime) +
new SimpleDateFormat(DATE_FORMAT_STR, Locale.CHINA).format(new Date()));
changeHeaderViewByState();
}
/**
* 正在加載更多，F(xiàn)ootView顯示 ： 加載中...
*
*/
private void onLoadMore() {
if (mLoadMoreListener != null) {
// 加載中...
mEndLoadTipsTextView.setText(R.string.p2refresh_doing_end_refresh);
mEndLoadTipsTextView.setVisibility(View.VISIBLE);
mEndLoadProgressBar.setVisibility(View.VISIBLE);
mLoadMoreListener.onLoadMore();
}
}
/**
* 加載更多完成
*
*/
public void onLoadMoreComplete() {
if(mIsAutoLoadMore){
mEndState = ENDINT_AUTO_LOAD_DONE;
}else{
mEndState = ENDINT_MANUAL_LOAD_DONE;
}
changeEndViewByState();
}
/**
* 主要更新一下刷新時間啦！
* @param adapter
*
*/
public void setAdapter(BaseAdapter adapter) {
// 最近更新: Time
mLastUpdatedTextView.setText(
getResources().getString(R.string.p2refresh_refresh_lasttime) +
new SimpleDateFormat(DATE_FORMAT_STR, Locale.CHINA).format(new Date()));
super.setAdapter(adapter);
}
public void setCanLoadMore(boolean pCanLoadMore) {
mCanLoadMore = pCanLoadMore;
if(mCanLoadMore && getFooterViewsCount() == 0){
addFooterView();
}
}
public void setCanRefresh(boolean pCanRefresh) {
mCanRefresh = pCanRefresh;
}
}
