package com.talent.allshare.widget;
import java.util.Date;
import android.content.Context;
import android.util.AttributeSet;
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.Adapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.youplayer.player.R;
public class PullToUpdataListView extends ListView implements OnScrollListener {
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;
// 实际的padding的距离与界面上偏移距离的比例
private final static int RATIO = 3;
private LayoutInflater inflater;
private LinearLayout headView;
private TextView tipsTextview;
private TextView lastUpdatedTextView;
private ImageView arrowImageView;
private ProgressBar progressBar;
private RotateAnimation animation;
private RotateAnimation reverseAnimation;
// 用于保证startY的�?在一个完整的touch事件中只被记录一�?
private boolean isRecored;
private int headContentWidth;
private int headContentHeight;
private int startY;
private int firstItemIndex;
private int state;
private boolean isBack;
private OnRefreshListener refreshListener;
private boolean isRefreshable;
private View mListViewFooter;
private View mFooterLoading;
private View mFooterLoaded;
private OnMoreListener mOnMoreListener;
private boolean mMoreEnable;
private boolean isMoreLoading;
private Adapter mAdapter;
public PullToUpdataListView(Context context) {
super(context);
init(context);
}
public PullToUpdataListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
private void init(Context context) {
setDivider(null);
setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
headView = (LinearLayout) inflater.inflate(R.layout.head, null);
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();
headContentWidth = headView.getMeasuredWidth();
headView.setPadding(0, -1 * headContentHeight, 0, 0);
headView.invalidate();
mListViewFooter = inflater.inflate(R.layout.footer_more, null);
mListViewFooter.setOnClickListener(new OnClickMoreListener());
mFooterLoading = mListViewFooter.findViewById(R.id.loading);
mFooterLoaded = mListViewFooter.findViewById(R.id.loaded);
mMoreEnable = true;
addHeaderView(headView, null, false);
addFooterView(mListViewFooter);
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;
isRefreshable = false;
}
public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int arg3) {
firstItemIndex = firstVisiableItem;
}
public void onScrollStateChanged(AbsListView arg0, int arg1) {
}
public boolean onTouchEvent(MotionEvent event) {
if (isRefreshable) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (firstItemIndex == 0 && !isRecored) {
isRecored = true;
startY = (int) event.getY();
}
break;
case MotionEvent.ACTION_UP:
if (state != REFRESHING && state != LOADING) {
if (state == DONE) {
// �?��都不�?
}
if (state == PULL_To_REFRESH) {
state = DONE;
changeHeaderViewByState();
}
if (state == RELEASE_To_REFRESH) {
state = REFRESHING;
changeHeaderViewByState();
onRefresh();
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_MOVE:
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0) {
isRecored = true;
startY = tempY;
}
if (state != REFRESHING && isRecored && state != LOADING) {
// 保证在设置padding的过程中，当前的位置�?��是在head，否则如果当列表超出屏幕的话，当在上推的时�?，列表会同时进行滚动
// 可以松手去刷新了
if (state == RELEASE_To_REFRESH) {
setSelection(0);
// �?��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
if (((tempY - startY) / RATIO < headContentHeight) && (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
// �?��子推到顶�?
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
// �?��拉了，或者还没有上推到屏幕顶部掩盖head的地�?
else {
// 不用进行特别的操作，只用更新paddingTop的�?就行�?
}
}
// 还没有到达显示松�?��新的时�?,DONE或�?是PULL_To_REFRESH状�?
if (state == PULL_To_REFRESH) {
setSelection(0);
// 下拉到可以进入RELEASE_TO_REFRESH的状�?
if ((tempY - startY) / RATIO >= headContentHeight) {
state = RELEASE_To_REFRESH;
isBack = true;
changeHeaderViewByState();
}
// 上推到顶�?
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
}
// done状�?�?
if (state == DONE) {
if (tempY - startY > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
}
// 更新headView的size
if (state == PULL_To_REFRESH) {
headView.setPadding(0, -1 * headContentHeight + (tempY - startY) / RATIO, 0, 0);
}
// 更新headView的paddingTop
if (state == RELEASE_To_REFRESH) {
headView.setPadding(0, (tempY - startY) / RATIO - headContentHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
// 当状态改变时候，调用该方法，以更新界�?
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(R.string.pull_to_refresh_release_label);
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�?转变来的
if (isBack) {
isBack = false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
tipsTextview.setText(R.string.pull_to_refresh_pull_label);
} else {
tipsTextview.setText(R.string.pull_to_refresh_pull_label);
}
break;
case REFRESHING:
headView.setPadding(0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
tipsTextview.setText(R.string.pull_to_refresh_refreshing_label);
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
case DONE:
headView.setPadding(0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.ic_pulltorefresh_arrow);
tipsTextview.setText(R.string.pull_to_refresh_pull_label);
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
}
}
public void setonRefreshListener(OnRefreshListener refreshListener) {
this.refreshListener = refreshListener;
if (refreshListener == null)
isRefreshable = false;
else
isRefreshable = true;
}
public interface OnRefreshListener {
public void onRefresh();
}
public void onRefreshComplete() {
state = DONE;
lastUpdatedTextView.setText(getContext().getResources().getString(R.string.last_updated) + new Date().toLocaleString());
changeHeaderViewByState();
}
private void onRefresh() {
if (refreshListener != null) {
refreshListener.onRefresh();
}
}
// 此方法直接照搬自网络上的�?��下拉刷新的demo，此处是“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);
}
public void setAdapter(BaseAdapter adapter) {
lastUpdatedTextView.setText(getContext().getResources().getString(R.string.last_updated) + new Date().toLocaleString());
super.setAdapter(adapter);
this.mAdapter = adapter;
if (!mMoreEnable) {
removeFooterView(mListViewFooter);
}
}
public void setOnMoreListener(OnMoreListener onMoreListener) {
this.mOnMoreListener = onMoreListener;
}
public interface OnMoreListener {
public void onMore();
}
public void onMoreComplete() {
isMoreLoading = false;
mFooterLoading.setVisibility(View.GONE);
mFooterLoaded.setVisibility(View.VISIBLE);
}
private class OnClickMoreListener implements OnClickListener {
@Override
public void onClick(View v) {
if (!isMoreLoading) {
isMoreLoading = true;
mFooterLoading.setVisibility(View.VISIBLE);
mFooterLoaded.setVisibility(View.GONE);
if (mOnMoreListener != null) {
mOnMoreListener.onMore();
}
}
}
}
public void setMoreEnable(boolean footerEnable) {
mMoreEnable = footerEnable;
if (mAdapter != null)
removeFooterView(mListViewFooter);
if (mMoreEnable) {
addFooterView(mListViewFooter);
}
}
public void setRefreshEnable(boolean isRefreshable) {
this.isRefreshable = isRefreshable;
}
public void setMoreViewVisible(boolean flag){
if(flag){
mListViewFooter.setVisibility(View.VISIBLE);
}else{
mListViewFooter.setVisibility(View.GONE);
}
}
}