package com.kitty.poclient.widget;
import java.util.Date;
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.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.kitty.poclient.R;
public class ScrollOverListView extends ListView implements OnScrollListener {
private int mLastY;
private static final String TAG = "ScrollOverListView";
private int mBottomPosition;
private boolean isBack;
private LayoutInflater inflater;
//底部刷新布局
private LinearLayout footView;
//头部刷新的布局
private LinearLayout headView;
/**箭头图标**/
private ImageView arrowImageView;
/**头部滚动条**/
private ProgressBar progressBar;
/**头部显示下拉刷新等的控件**/
private TextView tipsTextview;
/**刷新控件**/
private TextView lastUpdatedTextView;
/**头部高度**/
private int headContentHeight;
/**底部高度*/
private int footContentHeight;
/**显示动画**/
private RotateAnimation animation;
/**头部回退显示动画**/
private RotateAnimation reverseAnimation;
/**状态**/
private int state;
/**无**/
private final static int DONE = 3;
/**开始的Y坐标**/
private int startY;
/**第一个item**/
private int firstItemIndex;
/** 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;
/**是否要使用下拉刷新功能**/
public boolean showRefresh = true;
/**实际的padding的距离与界面上偏移距离的比例**/
private final static int RATIO = 3;
/**松开更新**/
private final static int RELEASE_To_REFRESH = 0;
/**下拉更新**/
private final static int PULL_To_REFRESH = 1;
/**更新中**/
private final static int REFRESHING = 2;
/**加载中**/
private final static int LOADING = 4;
public static boolean canRefleash = true;
public ScrollOverListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public ScrollOverListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public ScrollOverListView(Context context) {
super(context);
init(context);
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
firstItemIndex = firstVisibleItem;
}
/**
* 初始化控件
*/
private void init(Context context){
mBottomPosition=0;
setCacheColorHint(0);
inflater = LayoutInflater.from(context);
headView=(LinearLayout) inflater.inflate(R.layout.pull_down_head,null);
footView=(LinearLayout) inflater.inflate(R.layout.pulldown_footer,null);
if(footView.getVisibility()==View.GONE){
System.out.println(View.GONE);
}else if(footView.getVisibility()==View.VISIBLE){
System.out.println(View.VISIBLE);
}else if(footView.getVisibility()==View.INVISIBLE){
System.out.println(View.INVISIBLE);
}
arrowImageView = (ImageView) headView
.findViewById(R.id.head_arrowImageView);
arrowImageView.setMinimumWidth(70);
arrowImageView.setMinimumHeight(50);
progressBar = (ProgressBar) headView
.findViewById(R.id.head_progressBar);
tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);
lastUpdatedTextView = (TextView) headView
.findViewById(R.id.head_lastUpdatedTextView);
measureView(headView);
headContentHeight=headView.getMeasuredHeight();
headView.setPadding(0, -1*headContentHeight, 0, 0);
headView.invalidate();//XX
footContentHeight=footView.getMeasuredHeight();
footView.setPadding(0, 0, 0,-1*footContentHeight);
footView.invalidate();
/**列表添加头部**/
addHeaderView(headView, null, false);
/**添加底部*/
addFooterView(footView,null,false);
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(250);
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);
state =DONE;
}
//估计headView的width以及height
private void measureView(View child) {
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_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);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
final int y = (int) ev.getRawY();// XX
cancelLongPress();
switch (action) {
/*
* case MotionEvent.ACTION_DOWN: {
*
* if(firstItemIndex==0 && !isRecored){ isRecored=true;
* startY=(int)ev.getY(); Log.i(TAG, "在down时候记录当前位置"); } mLastY=y; final
* boolean isHandled = mOnScrollOverListener.onMotionDown(ev); if
* (isHandled) { mLastY = y; return isHandled; }
*
* break; } case MotionEvent.ACTION_MOVE: { // 手指正在移动的时候
*
* int tempY=(int) ev.getY(); headView.setPadding(0,
* tempY/4-headContentHeight, 0, 0);
* footView.setPadding(0,tempY/4-footContentHeight, 0, 0); int[]
* prosut=new int[2]; headView.getLocationInWindow(prosut); Log.i("kk",
* headView.getPaddingTop()+"------"+headContentHeight+"==="
* +prosut[0]+"=="+prosut[1]);
*
* break; } case MotionEvent.ACTION_UP: {// 弹起 int[] prosut = new
* int[2]; headView.getLocationInWindow(prosut); if (prosut[1] == 90) {
* // tipsTextview.setText("刷新成功");
*
* try { VirtualData.clearcacheinitData(); Thread.sleep(500);
*
* } catch (Exception e) { // tipsTextview.setText("刷新失败");
* e.printStackTrace(); } } headView.setPadding(0, -1 *
* headContentHeight, 0, 0); footView.setPadding(0, 0, 0, -1 *
* footContentHeight); // tipsTextview.setText(""); }
*/
}
mLastY = y;
return super.onTouchEvent(ev);
}
/**空的*/
private OnScrollOverListener mOnScrollOverListener = new OnScrollOverListener(){
@Override
public boolean onListViewTopAndPullDown(int delta) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onListViewBottomAndPullUp(int delta) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onMotionDown(MotionEvent ev) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onMotionMove(MotionEvent ev, int delta) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onMotionUp(MotionEvent ev) {
// TODO Auto-generated method stub
return false;
}
};
/**
*滚动监听接口
*
*/
public interface OnScrollOverListener{
/**
* 到达最顶部触发 手指点击移动产生的偏移量
*/
boolean onListViewTopAndPullDown(int delta);
/**
* 手指点击移动产生的偏移量
* 到达最底部触发
*/
boolean onListViewBottomAndPullUp(int delta);
/**
* 手指触摸按下触发，相当于{@link MotionEvent#ACTION_DOWN}
*/
boolean onMotionDown(MotionEvent ev);
/**
* 手指触摸移动触发，
*
* */
boolean onMotionMove(MotionEvent ev, int delta);
/**
* 手指触摸后提起触发，相当于{@link MotionEvent#ACTION_UP}
*/
boolean onMotionUp(MotionEvent ev);
}
// 当状态改变时候，调用该方法，以更新界面
private void changeHeaderViewByState() {
switch (state) {
case RELEASE_To_REFRESH:
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
tipsTextview.setText("松开刷新");
Log.v(TAG, "当前状态，松开刷新");
break;
case PULL_To_REFRESH:
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH状态转变来的
if (isBack) {
isBack = false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
tipsTextview.setText("下拉刷新");
} else {
tipsTextview.setText("下拉刷新");
}
Log.v(TAG, "当前状态，下拉刷新");
break;
case REFRESHING:
headView.setPadding(0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
tipsTextview.setText("正在刷新...");
lastUpdatedTextView.setVisibility(View.VISIBLE);
Log.v(TAG, "当前状态,正在刷新...");
break;
case DONE:
headView.setPadding(0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.pull_down_arrow);
tipsTextview.setText("下拉刷新");
lastUpdatedTextView.setVisibility(View.VISIBLE);
Log.v(TAG, "当前状态，done");
break;
}
}
public void onRefreshComplete() {
state = DONE;
lastUpdatedTextView.setText("最近更新:" + new Date().toLocaleString());
changeHeaderViewByState();
}
/**
* 设置这个Listener可以监听是否到达顶端，或者是否到达低端等事件</br>
*
* @see OnScrollOverListener
*/
public void setOnScrollOverListener(
OnScrollOverListener onScrollOverListener) {
mOnScrollOverListener = onScrollOverListener;
}
// =============================== public method
/**
* 可以自定义其中一个条目为头部，头部触发的事件将以这个为准，默认为第一个
*
* @param index 正数第几个，必须在条目数范围之内
*/
public void setTopPosition(int index) {
if (getAdapter() == null)
throw new NullPointerException(
"You must set adapter before setTopPosition!");
if (index < 0)
throw new IllegalArgumentException("Top position must > 0");
}
/**
* 可以自定义其中一个条目为尾部，尾部触发的事件将以这个为准，默认为最后一个
*
* @param index 倒数第几个，必须在条目数范围之内
*/
public void setBottomPosition(int index) {
if (getAdapter() == null)
throw new NullPointerException(
"You must set adapter before setBottonPosition!");
if (index < 0)
throw new IllegalArgumentException("Bottom position must > 0");
mBottomPosition = index;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
}
}