package com.threeH.MyExhibition.widget;
import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.AccelerateDecelerateInterpolator;
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.RelativeLayout;
import android.widget.TextView;
import com.threeH.MyExhibition.R;
import com.threeH.MyExhibition.cache.XmlDB;
import com.threeH.MyExhibition.tools.PixelDpHelper;
import com.threeH.MyExhibition.tools.TimeHelper;
import com.threeH.MyExhibition.ui.MyApplication;
public class PullToRefreshView extends ListView implements OnScrollListener,
OnClickListener {
private Context mCon;
private LayoutInflater mInflater;
private MyApplication mApp;
public PullToRefreshView(Context context) {
super(context);
init(context);
}
public PullToRefreshView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
private final int RELEASE_To_REFRESH = 0;
/** 下拉刷新. */
private final int PULL_To_REFRESH = 1;
private final int REFRESHING = 2;
/** 刷新完毕状态 */
private final int DONE = 3;
// 实际的padding的距离与界面上偏移距离的比例
private final int RATIO = 1;
/** ListView顶部的HeaderView. */
private LinearLayout mHeadView;
/** ListView刷新状态显示，比如:正在刷新...;放手吧; */
private TextView mListStatus;
/** ListView上次刷新时间显示，比如:最近更新:06-01 12:00 */
private TextView mListUpdateTime;
/** ListView变换箭头. */
private ImageView mListHeadArrow;
/** 顶部Loading的View. */
private ImageView mListHeadLoading;
/** 顶部AnimationDrawable. */
private AnimationDrawable mHeaderAnim;
/** ListView顶部高度. */
private int mHeadHeight;
/** ListView底部的FooterView. */
public RelativeLayout mFootView;
/** 底部Footer布局的Layout */
private RelativeLayout mFootBgLayout;
/** 底部Loading的View. */
private ImageView mListFootLoading;
/** 底部AnimationDrawable. */
private AnimationDrawable mFooterAnim;
// /** 当ListView为空时显示的View. */
// private View emptyFootView;
/** ListView滑动状态. */
private int mListState;
/** 是否显示回到顶端的标示位. */
private boolean isShowBackToTop = false;
private final int HIDEBACKTOTOP = 0;
/** 目前ListView的状态(正在刷新中....;刷新完毕;) */
private int mRefreshState;
private OnRefreshListener mOnRefreshListener;
/** 由松开进行刷新状态变为下拉进行刷新状态. */
private boolean isBack;
private RotateAnimation animation;
private RotateAnimation reverseAnimation;
/** 用于保证startY的值在一个完整的touch事件中只被记录一次. */
private boolean isRecored;
private int startY;
private int mFirstVisibleItem;
private boolean isRefreshable;
private boolean mBanRefresh = true;
Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case HIDEBACKTOTOP:
if (!isShowBackToTop) {
if (mBackToTopView != null) {
mBackToTopView.setVisibility(View.GONE);
}
}
break;
}
}
};
private void init(Context context) {
this.mCon = context;
/** 防止滑动变黑. */
setCacheColorHint(mCon.getResources().getColor(R.color.transparent));
mInflater = LayoutInflater.from(mCon);
mApp = (MyApplication) mCon.getApplicationContext();
mHeadView = (LinearLayout) mInflater
.inflate(R.layout.list_header, null);
mListHeadArrow = (ImageView) mHeadView
.findViewById(R.id.mListHeadArrow);
mListHeadArrow.setMinimumHeight(50);
mListHeadLoading = (ImageView) mHeadView
.findViewById(R.id.mListHeadLoading);
mHeaderAnim = (AnimationDrawable) mListHeadLoading.getDrawable();
mListStatus = (TextView) mHeadView.findViewById(R.id.mListStatus);
mListUpdateTime = (TextView) mHeadView
.findViewById(R.id.mListUpdateTime);
measureView(mHeadView);
mHeadHeight = mHeadView.getMeasuredHeight();
mHeadView.setPadding(0, -1 * mHeadHeight, 0, 0);
mHeadView.invalidate();
addHeaderView(mHeadView, null, false);
/** 底部View. */
mFootView = (RelativeLayout) mInflater.inflate(R.layout.list_footer,
null);
mFootView.setOnClickListener(this);
mFootBgLayout = (RelativeLayout) mFootView
.findViewById(R.id.mFootBgLayout);
mListFootLoading = (ImageView) mFootView
.findViewById(R.id.mListFootLoading);
mFooterAnim = (AnimationDrawable) mListFootLoading.getDrawable();
mRefreshFooterText = (TextView) mFootView
.findViewById(R.id.refresh_tv_message);
// emptyFootView = mInflater.inflate(R.layout.empty_foot, null);
setOnScrollListener(this);
animation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
animation.setInterpolator(new LinearInterpolator());
animation.setDuration(200);
animation.setFillAfter(true);
reverseAnimation = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
reverseAnimation.setInterpolator(new LinearInterpolator());
reverseAnimation.setDuration(200);
reverseAnimation.setFillAfter(true);
mRefreshState = DONE;
isRefreshable = false;
}
private void measureView(View child) {
ViewGroup.LayoutParams p = child.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);
}
child.measure(childWidthSpec, childHeightSpec);
}
public void onScrollStateChanged(AbsListView arg0, int scrollState) {
mListState = scrollState;
}
public void onScroll(AbsListView arg0, int firstVisibleItem, int arg2,
int arg3) {
mFirstVisibleItem = firstVisibleItem;
switch (mListState) {
case SCROLL_STATE_FLING:
if (mFirstVisibleItem == 0) {
isShowBackToTop = false;
mHandler.sendEmptyMessageDelayed(HIDEBACKTOTOP, 1000);
} else {
isShowBackToTop = true;
}
break;
case SCROLL_STATE_TOUCH_SCROLL:
if (mBackToTopView != null) {
mBackToTopView.setVisibility(View.VISIBLE);
isShowBackToTop = true;
}
break;
case SCROLL_STATE_IDLE:
isShowBackToTop = false;
mHandler.sendEmptyMessageDelayed(HIDEBACKTOTOP, 3000);
break;
}
}
public boolean onTouchEvent(MotionEvent event) {
if (isRefreshable && mBanRefresh) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// Trace.e("action down called");
if (mFirstVisibleItem == 0 && !isRecored) {
isRecored = true;
startY = (int) event.getY();
}
break;
case MotionEvent.ACTION_CANCEL:
// Trace.e("action cancel called");
if (mRefreshState != REFRESHING) {
if (mRefreshState == RELEASE_To_REFRESH) {
mRefreshState = REFRESHING;
changeHeadStatus();
onRefresh(HEADER);
} else {
mRefreshState = DONE;
changeHeadStatus();
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_UP:
// Trace.e("action up called");
if (mRefreshState != REFRESHING) {
if (mRefreshState == RELEASE_To_REFRESH) {
mRefreshState = REFRESHING;
changeHeadStatus();
onRefresh(HEADER);
} else {
mRefreshState = DONE;
changeHeadStatus();
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_MOVE:
// Trace.d("action move called");
int tempY = (int) event.getY();
if (!isRecored && mFirstVisibleItem == 0) {
isRecored = true;
startY = tempY;
}
if (mRefreshState != REFRESHING && isRecored) {
// 保证在设置padding的过程中，当前的位置一直是在head，否则如果当列表超出屏幕的话，当在上推的时候，列表会同时进行滚动
if (mRefreshState == RELEASE_To_REFRESH) {
setSelection(0);
if (((tempY - startY)
/ PixelDpHelper.dip2px(getContext(), RATIO) < mHeadHeight)
&& (tempY - startY) > 0) {
/** 往上推了，推到了屏幕足够掩盖head的程度，但是还没有推到全部掩盖的地步 */
mRefreshState = PULL_To_REFRESH;
changeHeadStatus();
} else if (tempY - startY <= 0) {
mRefreshState = DONE;
changeHeadStatus();
}
}
if (mRefreshState == PULL_To_REFRESH) {
/** 还没有到达显示松开刷新的时候,DONE或者是PULL_To_REFRESH状态 */
setSelection(0);
if ((tempY - startY)
/ PixelDpHelper.dip2px(getContext(), RATIO) >= mHeadHeight) {
/** 下拉到可以进入RELEASE_TO_REFRESH的状态 */
mRefreshState = RELEASE_To_REFRESH;
isBack = true;
changeHeadStatus();
} else if (tempY - startY <= 0) {
/** 上推到顶了 */
mRefreshState = DONE;
changeHeadStatus();
}
}
if (mRefreshState == DONE) {
if (tempY - startY > 0) {
mRefreshState = PULL_To_REFRESH;
changeHeadStatus();
}
}
if (mRefreshState == PULL_To_REFRESH) {
mHeadView.setPadding(
0,
-1
* mHeadHeight
+ (tempY - startY)
/ PixelDpHelper.dip2px(getContext(),
RATIO), 0, 0);
}
if (mRefreshState == RELEASE_To_REFRESH) {
mHeadView.setPadding(0, (tempY - startY)
/ PixelDpHelper.dip2px(getContext(), RATIO)
- mHeadHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
// 当状态改变时候，调用该方法，以更新界面
private void changeHeadStatus() {
switch (mRefreshState) {
case RELEASE_To_REFRESH:
/** 当前状态，松开刷新 */
/** 播放松开刷新的提示音 */
// mApp.playSound(R.raw.xiala);
mListHeadArrow.setVisibility(View.VISIBLE);
mListHeadLoading.setVisibility(View.GONE);
mHeaderAnim.stop();
mListStatus.setVisibility(View.VISIBLE);
mListUpdateTime.setVisibility(View.VISIBLE);
mListHeadArrow.clearAnimation();
mListHeadArrow.startAnimation(animation);
mListStatus.setText("放手吧");
break;
case PULL_To_REFRESH:
mListHeadLoading.setVisibility(View.GONE);
mHeaderAnim.stop();
mListStatus.setVisibility(View.VISIBLE);
mListUpdateTime.setVisibility(View.VISIBLE);
mListHeadArrow.clearAnimation();
mListHeadArrow.setVisibility(View.VISIBLE);
if (isBack) {
/** 是由RELEASE_To_REFRESH状态转变来的 */
isBack = false;
mListHeadArrow.clearAnimation();
mListHeadArrow.startAnimation(reverseAnimation);
mListStatus.setText("下拉刷新");
// mApp.playSound(R.raw.pushup);
} else {
mListStatus.setText("下拉刷新");
}
break;
case REFRESHING:
/** 当前状态,正在刷新... */
mHeadView.setPadding(0, 0, 0, 0);
mListHeadLoading.setVisibility(View.VISIBLE);
mHeaderAnim.start();
mListHeadArrow.setVisibility(View.VISIBLE);
mListHeadArrow.clearAnimation();
mListHeadArrow.setVisibility(View.GONE);
mListStatus.setText("正在刷新...");
mListUpdateTime.setVisibility(View.VISIBLE);
break;
case DONE:
smoothScrollTo(mHeadView.getPaddingTop(), -1 * mHeadHeight,
-mHeadHeight);
mListHeadLoading.setVisibility(View.GONE);
mHeaderAnim.stop();
mListHeadArrow.setVisibility(View.VISIBLE);
mListHeadArrow.clearAnimation();
mListHeadArrow.setImageResource(R.drawable.ic_refresh_droparrow);
mListStatus.setText("下拉刷新");
mListUpdateTime.setVisibility(View.VISIBLE);
break;
}
}
private SmoothScrollRunnable mSmoothScrollRunnable;
private final Handler handler = new Handler();
protected final void smoothScrollTo(int mFromY, int mToY, int mEndPos) {
if (null != mSmoothScrollRunnable) {
mSmoothScrollRunnable.stop();
}
if (this.getScrollY() != mToY) {
this.mSmoothScrollRunnable = new SmoothScrollRunnable(handler,
mFromY, mToY, mEndPos);
handler.post(mSmoothScrollRunnable);
}
}
final class SmoothScrollRunnable implements Runnable {
static final int ANIMATION_DURATION_MS = 250;
static final int ANIMATION_FPS = 1000 / 100;
private final Interpolator interpolator;
private final int scrollToY;
private final int scrollFromY;
private final int mEndPos;
private final Handler handler;
private boolean continueRunning = true;
private long startTime = -1;
private int currentY = -1;
public SmoothScrollRunnable(Handler handler, int fromY, int toY,
int mEndPos) {
this.handler = handler;
this.scrollFromY = fromY;
this.scrollToY = toY;
this.mEndPos = mEndPos;
this.interpolator = new AccelerateDecelerateInterpolator();
}
@Override
public void run() {
/**
* Only set startTime if this is the first time we're starting, else
* actually calculate the Y delta
*/
if (startTime == -1) {
startTime = System.currentTimeMillis();
} else {
/**
* We do do all calculations in long to reduce software float
* calculations. We use 1000 as it gives us good accuracy and
* small rounding errors
*/
long normalizedTime = (1000 * (System.currentTimeMillis() - startTime))
/ ANIMATION_DURATION_MS;
normalizedTime = Math.max(Math.min(normalizedTime, 1000), 0);
final int deltaY = Math
.round((scrollFromY - scrollToY)
* interpolator
.getInterpolation(normalizedTime / 1000f));
this.currentY = scrollFromY - deltaY;
setHeaderScroll(currentY);
}
// If we're not at the target Y, keep going...
if (continueRunning && scrollToY != currentY) {
handler.postDelayed(this, ANIMATION_FPS);
} else {
mHeadView.setPadding(0, mEndPos, 0, 0);
}
}
public void stop() {
this.continueRunning = false;
this.handler.removeCallbacks(this);
}
};
protected final void setHeaderScroll(int y) {
mHeadView.setPadding(0, y, 0, 0);
}
/** ListView数据刷新或加载更多时回调的注册函数. */
public void setOnRefreshListener(OnRefreshListener onRefreshListener) {
this.mOnRefreshListener = onRefreshListener;
isRefreshable = true;
}
public interface OnRefreshListener {
public void onRefresh(int which);
}
public void setRefreshAble(boolean enable) {
mBanRefresh = enable;
}
/**
* Resets the list to a normal mRefreshState after a refresh.
*/
public void onRefreshComplete(int which) {
switch (which) {
case HEADER:
mRefreshState = DONE;
initRefreshTime();
changeHeadStatus();
invalidateViews();
break;
case FOOTER:
mFootBgLayout.setBackgroundResource(R.drawable.sy01_2x);
mListFootLoading.setVisibility(View.GONE);
mFooterAnim.stop();
mRefreshFooterText.setText("查看更多");
mRefreshState = DONE;
changeHeadStatus();
invalidateViews();
break;
}
}
public void initRefreshTime() {
if (this.getTag() == null) {
mListUpdateTime.setText("最近更新:" + TimeHelper.getCurrentMinute());
return;
}
if ("ChatList".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_ChatList",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue(
"list_ChatList", TimeHelper.getCurrentMinute()));
} else if ("Inbox".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_Inbox",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_Inbox",
TimeHelper.getCurrentMinute()));
} else if ("OnLine".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_OnLine",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_OnLine",
TimeHelper.getCurrentMinute()));
} else if ("Nearby".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_Nearby",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_Nearby",
TimeHelper.getCurrentMinute()));
} else if ("dynamic".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_dynamic",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_dynamic",
TimeHelper.getCurrentMinute()));
}
}
/** ListView刷新时调用的方法(可能由下拉ListView或点击"更多"触发该方法). */
public void initRefresh(int which) {
prepareForRefresh(which);
onRefresh(which);
}
public final static int HEADER = 0;
public final static int FOOTER = 1;
private void prepareForRefresh(int which) {
switch (which) {
case HEADER:
mRefreshState = REFRESHING;
changeHeadStatus();
break;
case FOOTER:
mFootBgLayout.setBackgroundDrawable(null);
mListFootLoading.setVisibility(View.VISIBLE);
mFooterAnim.start();
mRefreshFooterText.setText("加载中...");
mRefreshState = REFRESHING;
break;
}
}
public void onRefresh(int which) {
if (mOnRefreshListener != null) {
mOnRefreshListener.onRefresh(which);
}
}
public void setAdapter(BaseAdapter adapter) {
initRefreshTime1();
super.setAdapter(adapter);
}
public void initRefreshTime1() {
if (this.getTag() == null) {
mListUpdateTime.setText("最近更新:" + TimeHelper.getCurrentMinute());
return;
}
if ("ChatList".equalsIgnoreCase(this.getTag().toString())) {
XmlDB.getInstance(mCon).saveKey("list_ChatList",
TimeHelper.getCurrentMinute());
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue(
"list_ChatList", TimeHelper.getCurrentMinute()));
} else if ("Inbox".equalsIgnoreCase(this.getTag().toString())) {
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_Inbox",
TimeHelper.getCurrentMinute()));
} else if ("OnLine".equalsIgnoreCase(this.getTag().toString())) {
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_OnLine",
TimeHelper.getCurrentMinute()));
} else if ("Nearby".equalsIgnoreCase(this.getTag().toString())) {
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_Nearby",
TimeHelper.getCurrentMinute()));
} else if ("dynamic".equalsIgnoreCase(this.getTag().toString())) {
mListUpdateTime.setText("最近更新:"
+ XmlDB.getInstance(mCon).getKeyStringValue("list_dynamic",
TimeHelper.getCurrentMinute()));
}
}
private ImageView mBackToTopView;
public void setTopViewImage(ImageView mTopViewImage) {
this.mBackToTopView = mTopViewImage;
mTopViewImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
setSelection(0);
}
});
}
private View mTempFootView = null;
private TextView mRefreshFooterText;
public void addFooterView() {
// if (!hasFooter) {
removeFooterView();
mTempFootView = mFootView;
addFooterView(mFootView);
// hasFooter = true;
// }
}
// public void addEmptyView(int drawableId) {
// removeFooterView();
// emptyFootView.findViewById(R.id.empty_imageview).setBackgroundResource(
// drawableId);
// mTempFootView = emptyFootView;
// addFooterView(mTempFootView);
// }
public void removeFooterView() {
if (mTempFootView != null) {
removeFooterView(mTempFootView);
}
}
@Override
public void onClick(View arg0) {
if (mRefreshState == DONE) {
initRefresh(FOOTER);
}
}
}