package com.todayinfo.ui.component.pulltozoomview;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.SystemClock;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Interpolator;
import android.widget.AbsListView;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.FrameLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
/**
* Author: ZhuWenWu Version V1.0 Date: 2014/11/7 18:01. Description:
* Modification History: Date Author Version Description
* ------------------------
* ----------------------------------------------------------- 2014/11/7
* ZhuWenWu 1.0 1.0 Why & What is modified:
*/
public class PullToZoomListViewEx extends PullToZoomBase<ListView> implements
AbsListView.OnScrollListener {
private static final String TAG = PullToZoomListViewEx.class
.getSimpleName();
private FrameLayout mHeaderContainer;
private int mHeaderHeight;
private ScalingRunnable mScalingRunnable;
private static final Interpolator sInterpolator = new Interpolator() {
public float getInterpolation(float paramAnonymousFloat) {
float f = paramAnonymousFloat - 1.0F;
return 1.0F + f * (f * (f * (f * f)));
}
};
public PullToZoomListViewEx(Context context) {
this(context, null);
}
public PullToZoomListViewEx(Context context, AttributeSet attrs) {
super(context, attrs);
mRootView.setOnScrollListener(this);
mScalingRunnable = new ScalingRunnable();
}
/**
* 是否显示headerView
*
* @param isHideHeader
* true: show false: hide
*/
@Override
public void setHideHeader(boolean isHideHeader) {
if (isHideHeader != isHideHeader()) {
super.setHideHeader(isHideHeader);
if (isHideHeader) {
removeHeaderView();
} else {
updateHeaderView();
}
}
}
@Override
public void setHeaderView(View headerView) {
if (headerView != null) {
this.mHeaderView = headerView;
updateHeaderView();
}
}
@Override
public void setZoomView(View zoomView) {
if (zoomView != null) {
this.mZoomView = zoomView;
updateHeaderView();
}
}
/**
* 移除HeaderView 如果要兼容API 9,需要修改此处逻辑，API 11以下不支持动态添加header
*/
private void removeHeaderView() {
if (mHeaderContainer != null) {
mRootView.removeHeaderView(mHeaderContainer);
}
}
/**
* 更新HeaderView 先移除-->再添加zoomView、HeaderView -->然后添加到listView的head 如果要兼容API
* 9,需要修改此处逻辑，API 11以下不支持动态添加header
*/
private void updateHeaderView() {
if (mHeaderContainer != null) {
mRootView.removeHeaderView(mHeaderContainer);
mHeaderContainer.removeAllViews();
if (mZoomView != null) {
mHeaderContainer.addView(mZoomView);
}
if (mHeaderView != null) {
mHeaderContainer.addView(mHeaderView);
}
mHeaderHeight = mHeaderContainer.getHeight();
mRootView.addHeaderView(mHeaderContainer);
}
}
public void setAdapter(ListAdapter adapter) {
mRootView.setAdapter(adapter);
}
public void setOnItemClickListener(AdapterView.OnItemClickListener listener) {
mRootView.setOnItemClickListener(listener);
}
/**
* 创建listView 如果要兼容API9,需要修改此处
*
* @param context
* 上下文
* @param attrs
* AttributeSet
* @return ListView
*/
@Override
protected ListView createRootView(Context context, AttributeSet attrs) {
ListView lv = new ListView(context, attrs);
// Set it to this so it can be used in ListActivity/ListFragment
lv.setId(android.R.id.list);
return lv;
}
/**
* 重置动画，自动滑动到顶部
*/
@Override
protected void smoothScrollToTop() {
Log.d(TAG, "smoothScrollToTop --> ");
mScalingRunnable.startAnimation(200L);
}
/**
* zoomView动画逻辑
*
* @param newScrollValue
* 手指Y轴移动距离值
*/
@Override
protected void pullHeaderToZoom(int newScrollValue) {
Log.d(TAG, "pullHeaderToZoom --> newScrollValue = " + newScrollValue);
Log.d(TAG, "pullHeaderToZoom --> mHeaderHeight = " + mHeaderHeight);
if (mScalingRunnable != null && !mScalingRunnable.isFinished()) {
mScalingRunnable.abortAnimation();
}
ViewGroup.LayoutParams localLayoutParams = mHeaderContainer
.getLayoutParams();
localLayoutParams.height = Math.abs(newScrollValue) + mHeaderHeight;
mHeaderContainer.setLayoutParams(localLayoutParams);
}
@Override
protected boolean isReadyForPullStart() {
return isFirstItemVisible();
}
private boolean isFirstItemVisible() {
final Adapter adapter = mRootView.getAdapter();
if (null == adapter || adapter.isEmpty()) {
return true;
} else {
/**
* This check should really just be:
* mRootView.getFirstVisiblePosition() == 0, but PtRListView
* internally use a HeaderView which messes the positions up. For
* now we'll just add one to account for it and rely on the inner
* condition which checks getTop().
*/
if (mRootView.getFirstVisiblePosition() <= 1) {
final View firstVisibleChild = mRootView.getChildAt(0);
if (firstVisibleChild != null) {
return firstVisibleChild.getTop() >= mRootView.getTop();
}
}
}
return false;
}
@Override
public void handleStyledAttributes(TypedArray a) {
mHeaderContainer = new FrameLayout(getContext());
if (mZoomView != null) {
mHeaderContainer.addView(mZoomView);
}
if (mHeaderView != null) {
mHeaderContainer.addView(mHeaderView);
}
mRootView.addHeaderView(mHeaderContainer);
}
/**
* 设置HeaderView高度
*
* @param width
* 宽
* @param height
* 高
*/
public void setHeaderViewSize(int width, int height) {
if (mHeaderContainer != null) {
Object localObject = mHeaderContainer.getLayoutParams();
if (localObject == null) {
localObject = new AbsListView.LayoutParams(width, height);
}
((ViewGroup.LayoutParams) localObject).width = width;
((ViewGroup.LayoutParams) localObject).height = height;
mHeaderContainer
.setLayoutParams((ViewGroup.LayoutParams) localObject);
mHeaderHeight = height;
}
}
public void setHeaderLayoutParams(AbsListView.LayoutParams layoutParams) {
if (mHeaderContainer != null) {
mHeaderContainer.setLayoutParams(layoutParams);
mHeaderHeight = layoutParams.height;
}
}
protected void onLayout(boolean paramBoolean, int paramInt1, int paramInt2,
int paramInt3, int paramInt4) {
super.onLayout(paramBoolean, paramInt1, paramInt2, paramInt3, paramInt4);
Log.d(TAG, "onLayout --> ");
if (mHeaderHeight == 0 && mHeaderContainer != null) {
mHeaderHeight = mHeaderContainer.getHeight();
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
Log.d(TAG, "onScrollStateChanged --> ");
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (mZoomView != null && !isHideHeader() && isPullToZoomEnabled()) {
float f = mHeaderHeight - mHeaderContainer.getBottom();
Log.d(TAG, "onScroll --> f = " + f);
if (isParallax()) {
if ((f > 0.0F) && (f < mHeaderHeight)) {
int i = (int) (0.65D * f);
mHeaderContainer.scrollTo(0, -i);
} else if (mHeaderContainer.getScrollY() != 0) {
mHeaderContainer.scrollTo(0, 0);
}
}
}
}
class ScalingRunnable implements Runnable {
protected long mDuration;
protected boolean mIsFinished = true;
protected float mScale;
protected long mStartTime;
ScalingRunnable() {
}
public void abortAnimation() {
mIsFinished = true;
}
public boolean isFinished() {
return mIsFinished;
}
public void run() {
if (mZoomView != null) {
float f2;
ViewGroup.LayoutParams localLayoutParams;
if ((!mIsFinished) && (mScale > 1.0D)) {
float f1 = ((float) SystemClock.currentThreadTimeMillis() - (float) mStartTime)
/ (float) mDuration;
f2 = mScale
- (mScale - 1.0F)
* PullToZoomListViewEx.sInterpolator
.getInterpolation(f1);
localLayoutParams = mHeaderContainer.getLayoutParams();
Log.d(TAG, "ScalingRunnable --> f2 = " + f2);
if (f2 > 1.0F) {
localLayoutParams.height = ((int) (f2 * mHeaderHeight));
mHeaderContainer.setLayoutParams(localLayoutParams);
post(this);
return;
}
mIsFinished = true;
}
}
}
public void startAnimation(long paramLong) {
if (mZoomView != null) {
mStartTime = SystemClock.currentThreadTimeMillis();
mDuration = paramLong;
mScale = ((float) (mHeaderContainer.getBottom()) / mHeaderHeight);
mIsFinished = false;
post(this);
}
}
}
}