public void transformPage(View view, float position) {
int pageWidth = view.getWidth();
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
ViewHelper.setAlpha(view, 0);
} else if (position <= 0) { // [-1,0]
// Use the default slide transition when moving to the left page
ViewHelper.setAlpha(view, 1);
ViewHelper.setTranslationX(view, 0);
ViewHelper.setScaleX(view, 1);
ViewHelper.setScaleY(view, 1);
} else if (position <= 1) { // (0,1]
// Fade the page out.
ViewHelper.setAlpha(view, 1 - position);
// Counteract the default slide transition
ViewHelper.setTranslationX(view, pageWidth * -position);
// Scale the page down (between MIN_SCALE and 1)
float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position));
ViewHelper.setScaleX(view, scaleFactor);
ViewHelper.setScaleY(view, scaleFactor);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
ViewHelper.setAlpha(view, 0);
}
}
protected void animateFade(View left, View right, float positionOffset) {
if (left != null) {
ViewHelper.setAlpha(left, 1 - positionOffset);
}
if (right != null) {
ViewHelper.setAlpha(right, positionOffset);
}
}
private void animateTitles() {
final View prevTextView = getChildAt(0);
final View nextTextView = getChildAt(getChildCount() - 1);
if (prevTextView == null || nextTextView == null) {
return;
}
// Set up initial values for the views that will be animated.
ViewHelper.setTranslationX(prevTextView, -INIT_OFFSET);
ViewHelper.setAlpha(prevTextView, 0);
ViewHelper.setTranslationX(nextTextView, INIT_OFFSET);
ViewHelper.setAlpha(nextTextView, 0);
// Alpha animations.
final ValueAnimator alpha1 = ObjectAnimator.ofFloat(prevTextView, "alpha", 1);
final ValueAnimator alpha2 = ObjectAnimator.ofFloat(nextTextView, "alpha", 1);
final AnimatorSet alphaAnimatorSet = new AnimatorSet();
alphaAnimatorSet.playTogether(alpha1, alpha2);
alphaAnimatorSet.setDuration(ALPHA_MS);
alphaAnimatorSet.setStartDelay(ANIMATION_DELAY_MS);
// Bounce animation.
final float bounceDistance = getWidth() / 100f; // Hack: TextFields still have 0 width here.
final BounceAnimatorBuilder prevBounceAnimatorBuilder =
new BounceAnimatorBuilder(prevTextView, "translationX");
prevBounceAnimatorBuilder.queue(new Attributes(bounceDistance, BOUNCE1_MS));
prevBounceAnimatorBuilder.queue(new Attributes(-bounceDistance / 4, BOUNCE2_MS));
prevBounceAnimatorBuilder.queue(new Attributes(0, BOUNCE3_MS));
final BounceAnimatorBuilder nextBounceAnimatorBuilder =
new BounceAnimatorBuilder(nextTextView, "translationX");
nextBounceAnimatorBuilder.queue(new Attributes(-bounceDistance, BOUNCE1_MS));
nextBounceAnimatorBuilder.queue(new Attributes(bounceDistance / 4, BOUNCE2_MS));
nextBounceAnimatorBuilder.queue(new Attributes(0, BOUNCE3_MS));
final AnimatorSet bounceAnimatorSet = new AnimatorSet();
bounceAnimatorSet.playTogether(
prevBounceAnimatorBuilder.build(), nextBounceAnimatorBuilder.build());
TransitionsTracker.track(nextBounceAnimatorBuilder);
final AnimatorSet titlesAnimatorSet = new AnimatorSet();
titlesAnimatorSet.playTogether(alphaAnimatorSet, bounceAnimatorSet);
titlesAnimatorSet.setStartDelay(ANIMATION_DELAY_MS);
// Start animations.
titlesAnimatorSet.start();
}
/** 滚动发生时调用 */
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
/**
* 距离qq差别 ：1.qq内容区域实现了一个缩放的效果 2.菜单的偏移量一直在变化 3.菜单也存在缩放和透明度的变化 实现1.需要将 0.7 ~ 1.0 (0.7 + 0.3 *
* scale) 实现2.修改菜单的其实隐藏跨度 实现3.菜单透明度变化0.6 ~ 1.0 ( 0.6 + 0.4 *(1-scale))+缩放：0.7~1.0（1.0 -
* scale*0.3）
*/
// l是当前SrocllX值
float scale = l * 1.0f / mMenuWidth;
Log.i("SlidingMenu:onScrollChanged", "" + scale);
// 调用属性动画 设置TranslationX 修改菜单的其实隐藏跨度,其实隐藏60%
ViewHelper.setTranslationX(mMenu, mMenuWidth * scale * 0.6f);
// 实现内容区域缩小
float contextScale = 0.7f + 0.3f * scale;
// 设置缩放的中心点 设置内容区域缩放值
ViewHelper.setPivotX(mContent, 0);
ViewHelper.setPivotY(mContent, mContent.getHeight() / 2);
ViewHelper.setScaleX(mContent, contextScale);
ViewHelper.setScaleY(mContent, contextScale);
// 实现菜单区域缩放
float menuScale = 1.0f - scale * 0.3f;
// 实现菜单透明度变化
float menuAlpha = 0.6f + 0.4f * (1 - scale);
// 调用属性动画实现
ViewHelper.setScaleX(mMenu, menuScale);
ViewHelper.setScaleY(mMenu, menuScale);
ViewHelper.setAlpha(mMenu, menuAlpha);
}
private void removePendingDismisses(int originalHeight) {
// No active animations, process all pending dismisses.
// Sort by descending position
Collections.sort(pendingDismisses);
int[] dismissPositions = new int[pendingDismisses.size()];
for (int i = pendingDismisses.size() - 1; i >= 0; i--) {
dismissPositions[i] = pendingDismisses.get(i).position;
}
swipeListView.onDismiss(dismissPositions);
ViewGroup.LayoutParams lp;
for (PendingDismissData pendingDismiss : pendingDismisses) {
// Reset view presentation
if (pendingDismiss.view != null) {
setAlpha(pendingDismiss.view, 1f);
setTranslationX(pendingDismiss.view, 0);
lp = pendingDismiss.view.getLayoutParams();
lp.height = originalHeight;
pendingDismiss.view.setLayoutParams(lp);
}
}
resetPendingDismisses();
}
public LoadToast(Context context) {
mView = new LoadToastView(context);
mParentView =
(ViewGroup)
((Activity) context).getWindow().getDecorView().findViewById(android.R.id.content);
mParentView.addView(
mView,
new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
ViewHelper.setAlpha(mView, 0);
mParentView.postDelayed(
new Runnable() {
@Override
public void run() {
ViewHelper.setTranslationX(mView, (mParentView.getWidth() - mView.getWidth()) / 2);
ViewHelper.setTranslationY(mView, -mView.getHeight() + mTranslationY);
mInflated = true;
if (!mToastCanceled && mShowCalled) show();
}
},
1);
mParentView
.getViewTreeObserver()
.addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
checkZPosition();
}
});
}
/**
* Modify dragged view alpha based on the horizontal position while the view is being horizontally
* dragged.
*/
void changeDragViewViewAlpha() {
if (enableHorizontalAlphaEffect) {
float alpha = 1 - getHorizontalDragOffset();
if (alpha == 0) {
alpha = 1;
}
ViewHelper.setAlpha(dragView, alpha);
}
}
@Override
protected void onTransform(View view, float position) {
final float scale = position < 0 ? position + 1f : Math.abs(1f - position);
ViewHelper.setScaleX(view, scale);
ViewHelper.setScaleY(view, scale);
ViewHelper.setPivotX(view, view.getWidth() * 0.5f);
ViewHelper.setPivotY(view, view.getHeight() * 0.5f);
ViewHelper.setAlpha(view, position < -1f || position > 1f ? 0f : 1f - (scale - 1f));
}
@Override
public void initView(View item, int position, int scrollDirection) {
ViewHelper.setPivotX(item, item.getWidth() / 2);
ViewHelper.setPivotY(item, item.getHeight() / 2);
ViewHelper.setScaleX(item, INITIAL_SCALE_FACTOR);
ViewHelper.setScaleY(item, INITIAL_SCALE_FACTOR);
ViewHelper.setTranslationY(item, item.getHeight() / 2 * scrollDirection);
ViewHelper.setAlpha(item, JazzyHelper.OPAQUE / 2);
}
/**
* Set either minutes or hours as showing.
*
* @param animate True to animate the transition, false to show with no animation.
*/
public void setCurrentItemShowing(int index, boolean animate) {
if (index != HOUR_INDEX && index != MINUTE_INDEX) {
Log.e(TAG, "TimePicker does not support view at index " + index);
return;
}
int lastIndex = getCurrentItemShowing();
mCurrentItemShowing = index;
if (animate && (index != lastIndex)) {
List<ObjectAnimator> anims = new ArrayList<ObjectAnimator>();
if (index == MINUTE_INDEX) {
anims.addAll(mHourRadialTextsView.getDisappearAnimator());
anims.addAll(mHourRadialSelectorView.getDisappearAnimator());
anims.addAll(mMinuteRadialTextsView.getReappearAnimator());
anims.addAll(mMinuteRadialSelectorView.getReappearAnimator());
} else if (index == HOUR_INDEX) {
anims.addAll(mHourRadialTextsView.getReappearAnimator());
anims.addAll(mHourRadialSelectorView.getReappearAnimator());
anims.addAll(mMinuteRadialTextsView.getDisappearAnimator());
anims.addAll(mMinuteRadialSelectorView.getDisappearAnimator());
}
if (mTransition != null && mTransition.isRunning()) {
mTransition.end();
}
mTransition = new AnimatorSet();
mTransition.playTogether(anims.toArray(new ObjectAnimator[anims.size()]));
mTransition.start();
} else {
int hourAlpha = (index == HOUR_INDEX) ? 255 : 0;
int minuteAlpha = (index == MINUTE_INDEX) ? 255 : 0;
Log.i(
TAG,
"set current item showing, no animate, hour alpha:"
+ hourAlpha
+ ", min alpha:"
+ minuteAlpha);
ViewHelper.setAlpha(mHourRadialTextsView, hourAlpha);
ViewHelper.setAlpha(mHourRadialSelectorView, hourAlpha);
ViewHelper.setAlpha(mMinuteRadialTextsView, minuteAlpha);
ViewHelper.setAlpha(mMinuteRadialSelectorView, minuteAlpha);
}
}
public static void reset(View view) {
ViewHelper.setAlpha(view, 1);
ViewHelper.setScaleX(view, 1);
ViewHelper.setScaleY(view, 1);
ViewHelper.setTranslationX(view, 0);
ViewHelper.setTranslationY(view, 0);
ViewHelper.setRotation(view, 0);
ViewHelper.setRotationY(view, 0);
ViewHelper.setRotationX(view, 0);
}
@Override
public void onScrollChanged(int scrollY, boolean firstScroll, boolean dragging) {
// Translate overlay and image
float flexibleRange = mFlexibleSpaceImageHeight - mActionBarSize;
int minOverlayTransitionY = mActionBarSize - mOverlayView.getHeight();
ViewHelper.setTranslationY(
mOverlayView, ScrollUtils.getFloat(-scrollY, minOverlayTransitionY, 0));
ViewHelper.setTranslationY(
mImageView, ScrollUtils.getFloat(-scrollY / 2, minOverlayTransitionY, 0));
// Change alpha of overlay
ViewHelper.setAlpha(mOverlayView, ScrollUtils.getFloat((float) scrollY / flexibleRange, 0, 1));
// Scale title text
float scale =
1
+ ScrollUtils.getFloat(
(flexibleRange - scrollY) / flexibleRange, 0, MAX_TEXT_SCALE_DELTA);
ViewHelper.setPivotX(mTitleView, 0);
ViewHelper.setPivotY(mTitleView, 0);
ViewHelper.setScaleX(mTitleView, scale);
ViewHelper.setScaleY(mTitleView, scale);
// Translate title text
int maxTitleTranslationY = (int) (mFlexibleSpaceImageHeight - mTitleView.getHeight() * scale);
int titleTranslationY = maxTitleTranslationY - scrollY;
ViewHelper.setTranslationY(mTitleView, titleTranslationY);
// Translate FAB
int maxFabTranslationY = mFlexibleSpaceImageHeight - mFab.getHeight() / 2;
float fabTranslationY =
ScrollUtils.getFloat(
-scrollY + mFlexibleSpaceImageHeight - mFab.getHeight() / 2,
mActionBarSize - mFab.getHeight() / 2,
maxFabTranslationY);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {
// On pre-honeycomb, ViewHelper.setTranslationX/Y does not set margin,
// which causes FAB's OnClickListener not working.
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mFab.getLayoutParams();
lp.leftMargin = mOverlayView.getWidth() - mFabMargin - mFab.getWidth();
lp.topMargin = (int) fabTranslationY;
mFab.requestLayout();
} else {
ViewHelper.setTranslationX(mFab, mOverlayView.getWidth() - mFabMargin - mFab.getWidth());
ViewHelper.setTranslationY(mFab, fabTranslationY);
}
// Show/hide FAB
if (fabTranslationY < mFlexibleSpaceShowFabOffset) {
hideFab();
} else {
showFab();
}
}
/**
* reset the view to default status
*
* @param target
*/
public void reset(View target) {
ViewHelper.setAlpha(target, 1);
ViewHelper.setScaleX(target, 1);
ViewHelper.setScaleY(target, 1);
ViewHelper.setTranslationX(target, 0);
ViewHelper.setTranslationY(target, 0);
ViewHelper.setRotation(target, 0);
ViewHelper.setRotationY(target, 0);
ViewHelper.setRotationX(target, 0);
ViewHelper.setPivotX(target, target.getMeasuredWidth() / 2.0f);
ViewHelper.setPivotY(target, target.getMeasuredHeight() / 2.0f);
}
@Override
protected void onTransform(View view, float position) {
final float scale = 1f + Math.abs(position);
ViewHelper.setScaleX(view, scale);
ViewHelper.setScaleY(view, scale);
ViewHelper.setPivotX(view, view.getWidth() * 0.5f);
ViewHelper.setPivotY(view, view.getWidth() * 0.5f);
ViewHelper.setAlpha(view, position < -1f || position > 1f ? 0f : 1f - (scale - 1f));
if (position < -0.9) {
// -0.9 to prevent a small bug
ViewHelper.setTranslationX(view, view.getWidth() * position);
}
}
/** 显示模糊背景 */
protected void showShowdown() {
ViewHelper.setTranslationY(mRootView, 0);
mEffect.effect(mParentVG, mBg);
ViewGroup.LayoutParams lp =
new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
mParentVG.addView(mBg, lp);
ViewHelper.setAlpha(mBg, 0);
ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mBg, "alpha", 0, 1);
objectAnimator.setDuration(400);
objectAnimator.start();
}
private void translateTab(int scrollY, boolean animated) {
int flexibleSpaceImageHeight =
getResources().getDimensionPixelSize(R.dimen.flexible_space_image_height);
int tabHeight = getResources().getDimensionPixelSize(R.dimen.tab_height);
View imageView = findViewById(R.id.image);
View overlayView = findViewById(R.id.overlay);
TextView titleView = (TextView) findViewById(R.id.title);
// Translate overlay and image
float flexibleRange = flexibleSpaceImageHeight - getActionBarSize();
int minOverlayTransitionY = tabHeight - overlayView.getHeight();
ViewHelper.setTranslationY(
overlayView, ScrollUtils.getFloat(-scrollY, minOverlayTransitionY, 0));
ViewHelper.setTranslationY(
imageView, ScrollUtils.getFloat(-scrollY / 2, minOverlayTransitionY, 0));
// Change alpha of overlay
ViewHelper.setAlpha(overlayView, ScrollUtils.getFloat((float) scrollY / flexibleRange, 0, 1));
// Scale title text
float scale =
1
+ ScrollUtils.getFloat(
(flexibleRange - scrollY - tabHeight) / flexibleRange, 0, MAX_TEXT_SCALE_DELTA);
setPivotXToTitle(titleView);
ViewHelper.setPivotY(titleView, 0);
ViewHelper.setScaleX(titleView, scale);
ViewHelper.setScaleY(titleView, scale);
// Translate title text
int maxTitleTranslationY = flexibleSpaceImageHeight - tabHeight - getActionBarSize();
int titleTranslationY = maxTitleTranslationY - scrollY;
ViewHelper.setTranslationY(titleView, titleTranslationY);
// If tabs are moving, cancel it to start a new animation.
ViewPropertyAnimator.animate(mSlidingTabLayout).cancel();
// Tabs will move between the top of the screen to the bottom of the image.
float translationY =
ScrollUtils.getFloat(
-scrollY + mFlexibleSpaceHeight - mTabHeight, 0, mFlexibleSpaceHeight - mTabHeight);
if (animated) {
// Animation will be invoked only when the current tab is changed.
ViewPropertyAnimator.animate(mSlidingTabLayout)
.translationY(translationY)
.setDuration(200)
.start();
} else {
// When Fragments' scroll, translate tabs immediately (without animation).
ViewHelper.setTranslationY(mSlidingTabLayout, translationY);
}
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
float scale = l * 1.0f / mMenuWidth;
float leftScale = 1 - 0.3f * scale;
// float rightScale = 0.8f + scale * 0.2f;
// ViewHelper.setScaleX(mMenu, leftScale);
// ViewHelper.setScaleY(mMenu, leftScale);
ViewHelper.setAlpha(mMenu, 0.6f + 0.4f * (1 - scale));
ViewHelper.setTranslationX(mMenu, mMenuWidth * scale * 0.7f);
/*ViewHelper.setPivotX(mContent, 0);
ViewHelper.setPivotY(mContent, mContent.getHeight() / 2);
ViewHelper.setScaleX(mContent, rightScale);
ViewHelper.setScaleY(mContent, rightScale);*/
}
/**
* Moves the view
*
* @param deltaX delta
*/
public void move(float deltaX) {
swipeRecyclerView.onMove(downPosition, deltaX);
float posX = ViewHelper.getX(frontView);
if (opened.get(downPosition)) {
posX += openedRight.get(downPosition) ? -viewWidth + rightOffset : viewWidth - leftOffset;
}
if (posX > 0 && !swipingRight) {
if (SwipeRecyclerView.DEBUG) {
Log.d(SwipeRecyclerView.TAG, "change to right");
}
swipingRight = !swipingRight;
swipeCurrentAction = swipeActionRight;
if (swipeCurrentAction == SwipeRecyclerView.SWIPE_ACTION_CHOICE) {
backView.setVisibility(View.GONE);
} else {
backView.setVisibility(View.VISIBLE);
}
}
if (posX < 0 && swipingRight) {
if (SwipeRecyclerView.DEBUG) {
Log.d(SwipeRecyclerView.TAG, "change to left");
}
swipingRight = !swipingRight;
swipeCurrentAction = swipeActionLeft;
if (swipeCurrentAction == SwipeRecyclerView.SWIPE_ACTION_CHOICE) {
backView.setVisibility(View.GONE);
} else {
backView.setVisibility(View.VISIBLE);
}
}
if (swipeCurrentAction == SwipeRecyclerView.SWIPE_ACTION_DISMISS) {
setTranslationX(parentView, deltaX);
setAlpha(parentView, Math.max(0f, Math.min(1f, 1f - 2f * Math.abs(deltaX) / viewWidth)));
} else if (swipeCurrentAction == SwipeRecyclerView.SWIPE_ACTION_CHOICE) {
if ((swipingRight && deltaX > 0 && posX < DISPLACE_CHOICE)
|| (!swipingRight && deltaX < 0 && posX > -DISPLACE_CHOICE)
|| (swipingRight && deltaX < DISPLACE_CHOICE)
|| (!swipingRight && deltaX > -DISPLACE_CHOICE)) {
setTranslationX(frontView, deltaX);
}
} else {
setTranslationX(frontView, deltaX);
}
}
public LoadToast show() {
if (!mInflated) {
mShowCalled = true;
return this;
}
mView.show();
ViewHelper.setTranslationX(mView, (mParentView.getWidth() - mView.getWidth()) / 2);
ViewHelper.setAlpha(mView, 0f);
ViewHelper.setTranslationY(mView, -mView.getHeight() + mTranslationY);
// mView.setVisibility(View.VISIBLE);
ViewPropertyAnimator.animate(mView)
.alpha(1f)
.translationY(25 + mTranslationY)
.setInterpolator(new DecelerateInterpolator())
.setDuration(300)
.setStartDelay(0)
.start();
return this;
}
public void show(final View view) {
pushedView = view;
if (this.getParent() != null) return;
synchronized (Snackbar.class) {
if (!next.contains(this)) next.add(this);
if (next.indexOf(this) == 0) {
View decor = ((Activity) getContext()).getWindow().getDecorView();
((ViewGroup) decor.findViewById(android.R.id.content))
.addView(
this, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
ViewHelper.setAlpha(content, 0);
AnimUtils.flyIn(content, null);
if (view != null) {
ValueAnimator animator = ValueAnimator.ofFloat(0, -1);
animator.setDuration(200);
animator.setInterpolator(new DecelerateInterpolator());
animator.addUpdateListener(
new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
MarginLayoutParams lp = (MarginLayoutParams) content.getLayoutParams();
Log.e(
"snackbar " + Snackbar.this.hashCode(),
""
+ ((content.getHeight() + lp.bottomMargin)
* (Float) valueAnimator.getAnimatedValue()));
ViewHelper.setTranslationY(
view,
(content.getHeight() + lp.bottomMargin)
* (Float) valueAnimator.getAnimatedValue());
if (pushedView.getParent() != null)
((View) pushedView.getParent()).postInvalidate();
}
});
animator.start();
}
if (duration != INFINITE) handler.postDelayed(hideRunnable, duration);
}
}
}
/**
* start any animation through percent
*
* @param percent the percent start any animation
*/
private void setAnimation(float percent) {
// the left panel's animation
// the left panel's scale of x is 0.5-1
ViewHelper.setScaleX(leftGroup, evalute(percent, 0.5f, 1.0f));
// the left panel's scale of y is 0.5-1
ViewHelper.setScaleY(leftGroup, evalute(percent, 0.5f, 1.0f));
// the left panel's tranlation range is -rangewidth-0
ViewHelper.setTranslationX(leftGroup, evalute(percent, -mRangeWidth, 0));
// the left panel's alpha range is 0.5-1
ViewHelper.setAlpha(leftGroup, evalute(percent, 0.5f, 1.0f));
// the main panel's animation
// the main panel's scale of x is 1.0-0.8
ViewHelper.setScaleX(mainGroup, evalute(percent, 1.0f, 0.8f));
// the main panel's scale of y is 1.0-0.8
ViewHelper.setScaleY(mainGroup, evalute(percent, 1.0f, 0.8f));
// the background's animation
getBackground()
.setColorFilter(
(Integer) evaluateColor(percent, Color.BLACK, Color.TRANSPARENT), Mode.SRC_OVER);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
// 首次使用获取banner初始高度和宽度
if (originHeight == -1 || originWidth == -1) {
originHeight = mTopView.getHeight();
originWidth = mTopView.getWidth();
}
// t为ScrollView向上滑动的量， 两者相减即为当前banner所需的高度
int height = originHeight - t;
// 计算缩放比例
float newRatio = (float) height / (float) originHeight;
// 修改banner的属性
if (height >= 0) {
ViewHelper.setScaleX(mTopView, newRatio);
ViewHelper.setScaleY(mTopView, newRatio);
ViewHelper.setY(mTopView, t / 2);
ViewHelper.setAlpha(mTopView, newRatio);
}
super.onScrollChanged(l, t, oldl, oldt);
}
@Override
public void setValue(View object, float value) {
ViewHelper.setAlpha(object, value);
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (mViewWidth < 2) {
mViewWidth = mListView.getWidth();
}
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
{
if (mPaused) {
return false;
}
// TODO: ensure this is a finger, and set a flag
// Find the child view that was touched (perform a hit test)
Rect rect = new Rect();
int childCount = mListView.getChildCount();
int[] listViewCoords = new int[2];
mListView.getLocationOnScreen(listViewCoords);
int x = (int) motionEvent.getRawX() - listViewCoords[0];
int y = (int) motionEvent.getRawY() - listViewCoords[1];
View child;
for (int i = 0; i < childCount; i++) {
child = mListView.getChildAt(i);
child.getHitRect(rect);
if (rect.contains(x, y)) {
mDownView = child;
break;
}
}
if (mDownView != null) {
mDownX = motionEvent.getRawX();
mDownPosition = mListView.getPositionForView(mDownView);
if (((ListItem) mListView.getAdapter().getItem(mDownPosition)).getId() < 0) {
return true;
}
mVelocityTracker = VelocityTracker.obtain();
mVelocityTracker.addMovement(motionEvent);
}
view.onTouchEvent(motionEvent);
return true;
}
case MotionEvent.ACTION_UP:
{
if (mVelocityTracker == null) {
break;
}
float deltaX = motionEvent.getRawX() - mDownX;
mVelocityTracker.addMovement(motionEvent);
mVelocityTracker.computeCurrentVelocity(1000);
float velocityX = Math.abs(mVelocityTracker.getXVelocity());
float velocityY = Math.abs(mVelocityTracker.getYVelocity());
boolean dismiss = false;
boolean dismissRight = false;
if (Math.abs(deltaX) > mViewWidth / 2) {
dismiss = true;
dismissRight = deltaX > 0;
} else if (mMinFlingVelocity <= velocityX
&& velocityX <= mMaxFlingVelocity
&& velocityY < velocityX) {
dismiss = true;
dismissRight = mVelocityTracker.getXVelocity() > 0;
}
if (dismiss) {
// dismiss
final View downView = mDownView; // mDownView gets null'd before animation ends
final int downPosition = mDownPosition;
++mDismissAnimationRefCount;
animate(mDownView)
.translationX(dismissRight ? mViewWidth : -mViewWidth)
.alpha(0)
.setDuration(mAnimationTime)
.setListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
performDismiss(downView, downPosition);
}
});
} else {
// cancel
animate(mDownView)
.translationX(0)
.alpha(1)
.setDuration(mAnimationTime)
.setListener(null);
}
mVelocityTracker = null;
mDownX = 0;
mDownView = null;
mDownPosition = ListView.INVALID_POSITION;
mSwiping = false;
break;
}
case MotionEvent.ACTION_MOVE:
{
if (mVelocityTracker == null || mPaused) {
break;
}
mVelocityTracker.addMovement(motionEvent);
float deltaX = motionEvent.getRawX() - mDownX;
if (Math.abs(deltaX) > mSlop) {
mSwiping = true;
mListView.requestDisallowInterceptTouchEvent(true);
// Cancel ListView's touch (un-highlighting the item)
MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
cancelEvent.setAction(
MotionEvent.ACTION_CANCEL
| (motionEvent.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
mListView.onTouchEvent(cancelEvent);
}
if (mSwiping) {
setTranslationX(mDownView, deltaX);
setAlpha(
mDownView, Math.max(0f, Math.min(1f, 1f - 2f * Math.abs(deltaX) / mViewWidth)));
return true;
}
break;
}
}
return false;
}
@Override
public boolean onTouch(final View view, final MotionEvent motionEvent) {
if (mViewWidth < 2) {
mViewWidth = mListView.getWidth();
}
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
{
if (mPaused) {
return false;
}
// Find the child view that was touched (perform a hit test)
final Rect rect = new Rect();
final int childCount = mListView.getChildCount();
final int[] listViewCoords = new int[2];
mListView.getLocationOnScreen(listViewCoords);
final int x = (int) motionEvent.getRawX() - listViewCoords[0];
final int y = (int) motionEvent.getRawY() - listViewCoords[1];
View child;
for (int i = 0; i < childCount; i++) {
child = mListView.getChildAt(i);
child.getHitRect(rect);
if (rect.contains(x, y)) {
mDownView = child;
break;
}
}
if (mDownView != null) {
mDownX = motionEvent.getRawX();
mDownPosition = mListView.getPositionForView(mDownView);
mVelocityTracker = VelocityTracker.obtain();
mVelocityTracker.addMovement(motionEvent);
}
view.onTouchEvent(motionEvent);
return true;
}
case MotionEvent.ACTION_UP:
{
if (mVelocityTracker == null) {
break;
}
final float deltaX = motionEvent.getRawX() - mDownX;
mVelocityTracker.addMovement(motionEvent);
mVelocityTracker.computeCurrentVelocity(1000);
final float velocityX = Math.abs(mVelocityTracker.getXVelocity());
final float velocityY = Math.abs(mVelocityTracker.getYVelocity());
boolean dismiss = false;
boolean dismissRight = false;
if (Math.abs(deltaX) > mViewWidth / 2 && mSwiping) {
dismiss = true;
dismissRight = deltaX > 0;
} else if (mMinFlingVelocity <= velocityX
&& velocityX <= mMaxFlingVelocity
&& velocityY < velocityX
&& mSwiping
&& isDirectionValid(mVelocityTracker.getXVelocity())
&& deltaX >= mViewWidth * 0.2f) {
dismiss = true;
dismissRight = mVelocityTracker.getXVelocity() > 0;
}
if (dismiss) {
// dismiss
final View downView = mDownView; // mDownView gets null'd before animation ends
final int downPosition = mDownPosition;
++mDismissAnimationRefCount;
animate(mDownView)
.translationX(dismissRight ? mViewWidth : -mViewWidth)
.alpha(0)
.setDuration(mAnimationTime)
.setListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(final Animator animation) {
performDismiss(downView, downPosition);
}
});
} else {
// cancel
animate(mDownView)
.translationX(0)
.alpha(1)
.setDuration(mAnimationTime)
.setListener(null);
}
mVelocityTracker = null;
mDownX = 0;
mDownView = null;
mDownPosition = AdapterView.INVALID_POSITION;
mSwiping = false;
break;
}
case MotionEvent.ACTION_MOVE:
{
if (mUndoPopup.isShowing()) {
// Send a delayed message to hide popup
mHandler.sendMessageDelayed(mHandler.obtainMessage(mDelayedMsgId), mAutoHideDelay);
}
if (mVelocityTracker == null || mPaused) {
break;
}
mVelocityTracker.addMovement(motionEvent);
float deltaX = motionEvent.getRawX() - mDownX;
// Only start swipe in correct direction
if (isDirectionValid(deltaX)) {
if (Math.abs(deltaX) > mSlop) {
mSwiping = true;
mListView.requestDisallowInterceptTouchEvent(true);
// Cancel ListView's touch (un-highlighting the item)
final MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
cancelEvent.setAction(
MotionEvent.ACTION_CANCEL
| (motionEvent.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
mListView.onTouchEvent(cancelEvent);
}
} else {
// If we swiped into wrong direction, act like this was the new
// touch down point
mDownX = motionEvent.getRawX();
deltaX = 0;
}
if (mSwiping) {
setTranslationX(mDownView, deltaX);
setAlpha(
mDownView, Math.max(0f, Math.min(1f, 1f - 2f * Math.abs(deltaX) / mViewWidth)));
return true;
}
break;
}
}
return false;
}
/** Modify the second view alpha based on dragged view vertical position. */
void changeSecondViewAlpha() {
ViewHelper.setAlpha(secondView, 1 - getVerticalDragOffset());
}
/** Restore view alpha to 1 */
void restoreAlpha() {
if (enableHorizontalAlphaEffect && ViewHelper.getAlpha(dragView) < 1) {
ViewHelper.setAlpha(dragView, 1);
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
float currentActivityScaleX = ViewHelper.getScaleX(viewActivity);
if (currentActivityScaleX == 1.0f) setScaleDirectionByRawX(ev.getRawX());
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
lastActionDownX = ev.getX();
lastActionDownY = ev.getY();
isInIgnoredView = isInIgnoredView(ev) && !isOpened();
pressedState = PRESSED_DOWN;
break;
case MotionEvent.ACTION_MOVE:
if (isInIgnoredView || isInDisableDirection(scaleDirection)) break;
if (pressedState != PRESSED_DOWN && pressedState != PRESSED_MOVE_HORIZONTAL) break;
int xOffset = (int) (ev.getX() - lastActionDownX);
int yOffset = (int) (ev.getY() - lastActionDownY);
if (pressedState == PRESSED_DOWN) {
if (yOffset > 25 || yOffset < -25) {
pressedState = PRESSED_MOVE_VERTICAL;
break;
}
if (xOffset < -50 || xOffset > 50) {
pressedState = PRESSED_MOVE_HORIZONTAL;
ev.setAction(MotionEvent.ACTION_CANCEL);
}
} else if (pressedState == PRESSED_MOVE_HORIZONTAL) {
if (currentActivityScaleX < 0.95) showScrollViewMenu(scrollViewMenu);
float targetScale = getTargetScale(ev.getRawX());
if (mUse3D) {
int angle = scaleDirection == DIRECTION_LEFT ? -ROTATE_Y_ANGLE : ROTATE_Y_ANGLE;
angle *= (1 - targetScale) * 2;
ViewHelper.setRotationY(viewActivity, angle);
ViewHelper.setScaleX(imageViewShadow, targetScale - shadowAdjustScaleX);
ViewHelper.setScaleY(imageViewShadow, targetScale - shadowAdjustScaleY);
} else {
ViewHelper.setScaleX(imageViewShadow, targetScale + shadowAdjustScaleX);
ViewHelper.setScaleY(imageViewShadow, targetScale + shadowAdjustScaleY);
}
ViewHelper.setScaleX(viewActivity, targetScale);
ViewHelper.setScaleY(viewActivity, targetScale);
ViewHelper.setAlpha(scrollViewMenu, (1 - targetScale) * 2.0f);
lastRawX = ev.getRawX();
return true;
}
break;
case MotionEvent.ACTION_UP:
if (isInIgnoredView) break;
if (pressedState != PRESSED_MOVE_HORIZONTAL) break;
pressedState = PRESSED_DONE;
if (isOpened()) {
if (currentActivityScaleX > 0.56f) closeMenu();
else openMenu(scaleDirection);
} else {
if (currentActivityScaleX < 0.94f) {
openMenu(scaleDirection);
} else {
closeMenu();
}
}
break;
}
lastRawX = ev.getRawX();
return super.dispatchTouchEvent(ev);
}
private void restoreViewPosition(View view) {
setAlpha(view, 1f);
setTranslationX(view, 0);
}
public void setAlpha(float x) {
ViewHelper.setAlpha(this, x);
}