List of usage examples for android.view View setTop
public final void setTop(int top)
From source file:Main.java
static public void setFrame(View v, Rect frame) { v.setTop(frame.top); v.setLeft(frame.left);//ww w . j a va2 s . com v.setBottom(frame.bottom); v.setRight(frame.right); }
From source file:Main.java
static public void setPosition(View v, PointF p) { int w = v.getWidth(); int h = v.getHeight(); v.setLeft((int) p.x); v.setTop((int) p.y); v.setRight((int) p.x + w); v.setBottom((int) p.y + h); }
From source file:com.chromium.fontinstaller.util.ViewUtils.java
public static void reveal(Activity activity, View view, View sourceView, int colorRes) { if (activity == null || view == null || sourceView == null) return;//from w ww. j av a 2 s .c om if (isLollipop()) { final ViewGroupOverlay groupOverlay = (ViewGroupOverlay) activity.getWindow().getDecorView() .getOverlay(); final Rect displayRect = new Rect(); view.getGlobalVisibleRect(displayRect); // Make reveal cover the display and status bar. final View revealView = new View(activity); revealView.setTop(displayRect.top); revealView.setBottom(displayRect.bottom); revealView.setLeft(displayRect.left); revealView.setRight(displayRect.right); revealView.setBackgroundColor(ContextCompat.getColor(activity, colorRes)); groupOverlay.add(revealView); final int[] clearLocation = new int[2]; sourceView.getLocationInWindow(clearLocation); clearLocation[0] += sourceView.getWidth() / 2; clearLocation[1] += sourceView.getHeight() / 2; final int revealCenterX = clearLocation[0] - revealView.getLeft(); final int revealCenterY = clearLocation[1] - revealView.getTop(); final double x1_2 = Math.pow(revealView.getLeft() - revealCenterX, 2); final double x2_2 = Math.pow(revealView.getRight() - revealCenterX, 2); final double y_2 = Math.pow(revealView.getTop() - revealCenterY, 2); final float revealRadius = (float) Math.max(Math.sqrt(x1_2 + y_2), Math.sqrt(x2_2 + y_2)); try { final Animator revealAnimator = ViewAnimationUtils.createCircularReveal(revealView, revealCenterX, revealCenterY, 0.0f, revealRadius); revealAnimator .setDuration(activity.getResources().getInteger(android.R.integer.config_mediumAnimTime)); final Animator alphaAnimator = ObjectAnimator.ofFloat(revealView, View.ALPHA, 0.0f); alphaAnimator .setDuration(activity.getResources().getInteger(android.R.integer.config_shortAnimTime)); alphaAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); view.startAnimation(AnimationUtils.loadAnimation(activity, R.anim.abc_fade_in)); view.setVisibility(View.VISIBLE); } }); final AnimatorSet animatorSet = new AnimatorSet(); animatorSet.play(revealAnimator).before(alphaAnimator); animatorSet.setInterpolator(new AccelerateDecelerateInterpolator()); animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animator) { groupOverlay.remove(revealView); } }); animatorSet.start(); } catch (IllegalStateException e) { Timber.i("View is detached - not animating"); } } else { view.setVisibility(View.VISIBLE); } }
From source file:com.android.clear.reminder.AnimatorUtils.java
/** * Returns an animator that animates the bounds of a single view. *//*from www . ja v a 2 s . co m*/ public static Animator getBoundsAnimator(View view, int fromLeft, int fromTop, int fromRight, int fromBottom, int toLeft, int toTop, int toRight, int toBottom) { view.setLeft(fromLeft); view.setTop(fromTop); view.setRight(fromRight); view.setBottom(fromBottom); return ObjectAnimator.ofPropertyValuesHolder(view, PropertyValuesHolder.ofInt(VIEW_LEFT, toLeft), PropertyValuesHolder.ofInt(VIEW_TOP, toTop), PropertyValuesHolder.ofInt(VIEW_RIGHT, toRight), PropertyValuesHolder.ofInt(VIEW_BOTTOM, toBottom)); }
From source file:com.xujun.contralayout.utils.AnimatorUtil.java
public static void show(final View view, int start, int end) { final int height = view.getHeight(); final ValueAnimator animator = ValueAnimator.ofInt(start, end); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override//from ww w . ja v a2s . co m public void onAnimationUpdate(ValueAnimator valueAnimator) { int value = (Integer) animator.getAnimatedValue(); Log.i(TAG, "onAnimationUpdate: value=" + value); view.setTop(value); view.setBottom(value + height); } }); view.setVisibility(View.VISIBLE); animator.setDuration(200); animator.setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR); animator.start(); }
From source file:com.rockspoon.rockandui.Components.RelativeLayoutWithSwipe.java
public void setTopView(View view) { id = view.getId();//from w ww . j a va2s.com view.addOnLayoutChangeListener(new OnLayoutChangeListener() { @Override public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) { if (isMoving()) { v.setTop(oldTop); v.setBottom(oldBottom); v.setLeft(oldLeft); v.setRight(oldRight); } } }); }
From source file:graphic.expand_graphic.ExpandingListView.java
private void init() { setOnItemClickListener(mItemClickListener); oldCoordinates = new HashMap<View, int[]>(); collapseLayoutParams = new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, mCollapsedHeight);// ww w .j a va 2 s . c o m generalLayoutParams = new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT); expandPreDrawListener = new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { /* Determine if this is the first or second pass.*/ if (!mShouldRemoveObserver) { mShouldRemoveObserver = true; /* Calculate what the parameters should be for setSelectionFromTop. * The ListView must be offset in a way, such that after the animation * takes place, all the cells that remain visible are rendered completely * by the ListView.*/ int newTop = mView.getTop(); int newBottom = mView.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int delta = newHeight - oldHeight; getTopAndBottomTranslations(oldTop, oldBottom, delta, true); int currentTop = mView.getTop(); int futureTop = oldTop - mTranslate[0]; int firstChildStartTop = getChildAt(0).getTop(); int firstVisiblePosition = getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = getChildCount(); for (i = 0; i < childCount; i++) { View v = getChildAt(i); int height = v.getBottom() - Math.max(0, v.getTop()); if (deltaTop - height > 0) { firstVisiblePosition++; deltaTop -= height; } else { break; } } if (i > 0) { firstChildStartTop = 0; } setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); /* Request another layout to update the layout parameters of the cells.*/ requestLayout(); /* Return false such that the ListView does not redraw its contents on * this layout but only updates all the parameters associated with its * children.*/ return false; } /* Remove the predraw listener so this method does not keep getting called. */ mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; // ArrayList <Animator> animations = new ArrayList<Animator>(); optimize int index = indexOfChild(mView); /* Loop through all the views that were on the screen before the cell was * expanded. Some cells will still be children of the ListView while * others will not. The cells that remain children of the ListView * simply have their bounds animated appropriately. The cells that are no * longer children of the ListView also have their bounds animated, but * must also be added to a list of views which will be drawn in dispatchDraw.*/ for (View v : oldCoordinates.keySet()) { int[] old = oldCoordinates.get(v); v.setTop(old[0]); v.setBottom(old[1]); if (v.getParent() == null) { mViewsToDraw.add(v); int delta = old[0] < oldTop ? -yTranslateTop : yTranslateBottom; animations.add(getAnimation(v, delta, delta)); } else { int i = indexOfChild(v); if (v != mView) { int delta = i > index ? yTranslateBottom : -yTranslateTop; animations.add(getAnimation(v, delta, delta)); } ViewCompat.setHasTransientState(v, false); } } /* Adds animation for expanding the cell that was clicked. */ animations.add(getAnimation(mView, -yTranslateTop, yTranslateBottom)); /* Adds an animation for fading in the extra content. */ animations.add(ObjectAnimator.ofFloat(holder.expandingView, //mView.findViewById(R.id.expanding_layout), optimize View.ALPHA, 0, 1)); /* Disabled the ListView for the duration of the animation.*/ setEnabled(false); setClickable(false); /* Play all the animations created above together at the same time. */ // AnimatorSet s = new AnimatorSet(); optimize s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { // viewObject.setExpanded(true); optimize viewObject.mIsExpanded = true; setEnabled(true); setClickable(true); s.removeAllListeners(); oldCoordinates.clear(); animations.clear(); if (mViewsToDraw.size() > 0) { for (View v : mViewsToDraw) { ViewCompat.setHasTransientState(v, false); } } mViewsToDraw.clear(); } }); s.start(); return true; } }; collapsePreDrawListener = new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (!mShouldRemoveObserver) { /*Same as for expandingView, the parameters for setSelectionFromTop must * be determined such that the necessary cells of the ListView are rendered * and added to it.*/ mShouldRemoveObserver = true; int newTop = mView.getTop(); int newBottom = mView.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int deltaHeight = oldHeight - newHeight; getTopAndBottomTranslations(oldTop, oldBottom, deltaHeight, false); int currentTop = mView.getTop(); int futureTop = oldTop + mTranslate[0]; int firstChildStartTop = getChildAt(0).getTop(); int firstVisiblePosition = getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = getChildCount(); for (i = 0; i < childCount; i++) { View v = getChildAt(i); int height = v.getBottom() - Math.max(0, v.getTop()); if (deltaTop - height > 0) { firstVisiblePosition++; deltaTop -= height; } else { break; } } if (i > 0) { firstChildStartTop = 0; } setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); requestLayout(); return false; } mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; int index = indexOfChild(mView); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); int[] old = oldCoordinates.get(v); if (old != null) { /* If the cell was present in the ListView before the collapse and * after the collapse then the bounds are reset to their old values.*/ v.setTop(old[0]); v.setBottom(old[1]); ViewCompat.setHasTransientState(v, false); } else { /* If the cell is present in the ListView after the collapse but * not before the collapse then the bounds are calculated using * the bottom and top translation of the collapsing cell.*/ int delta = i > index ? yTranslateBottom : -yTranslateTop; v.setTop(v.getTop() + delta); v.setBottom(v.getBottom() + delta); } } final View expandingLayout = holder.expandingView;// mView.findViewById (R.id.expanding_layout); optimize /* Animates all the cells present on the screen after the collapse. */ // ArrayList <Animator> animations = new ArrayList<Animator>(); optimize for (int i = 0; i < childCount; i++) { View v = getChildAt(i); if (v != mView) { float diff = i > index ? -yTranslateBottom : yTranslateTop; animations.add(getAnimation(v, diff, diff)); } } /* Adds animation for collapsing the cell that was clicked. */ animations.add(getAnimation(mView, yTranslateTop, -yTranslateBottom)); /* Adds an animation for fading out the extra content. */ animations.add(ObjectAnimator.ofFloat(expandingLayout, View.ALPHA, 1, 0)); /* Disabled the ListView for the duration of the animation.*/ setEnabled(false); setClickable(false); /* Play all the animations created above together at the same time. */ // AnimatorSet s = new AnimatorSet(); s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { expandingLayout.setVisibility(View.GONE); mView.setLayoutParams(generalLayoutParams); viewObject.mIsExpanded = false; // viewObject.setExpanded(false); s.removeAllListeners(); animations.clear(); oldCoordinates.clear(); setEnabled(true); setClickable(true); /* Note that alpha must be set back to 1 in case this view is reused * by a cell that was expanded, but not yet collapsed, so its state * should persist in an expanded state with the extra content visible.*/ expandingLayout.setAlpha(1); } }); s.start(); return true; } }; }
From source file:com.modprobe.profit.ExpandingListView.java
/** * This method collapses the view that was clicked and animates all the views * around it to close around the collapsing view. There are several steps required * to do this which are outlined below./*from www .ja v a 2 s . c o m*/ * * 1. Update the layout parameters of the view clicked so as to minimize its height * to the original collapsed (default) state. * 2. After invoking a layout, the listview will shift all the cells so as to display * them most efficiently. Therefore, during the first predraw pass, the listview * must be offset by some amount such that given the custom bound change upon * collapse, all the cells that need to be on the screen after the layout * are rendered by the listview. * 3. On the second predraw pass, all the items are first returned to their original * location (before the first layout). * 4. The collapsing view's bounds are animated to what the final values should be. * 5. The bounds above the collapsing view are animated downwards while the bounds * below the collapsing view are animated upwards. * 6. The extra text is faded out as its contents become visible throughout the * animation process. */ private void collapseView(final View view) { final SuggestionExpandingListViewItem viewObject = (SuggestionExpandingListViewItem) getItemAtPosition( getPositionForView(view)); /* Store the original top and bottom bounds of all the cells.*/ final int oldTop = view.getTop(); final int oldBottom = view.getBottom(); final HashMap<View, int[]> oldCoordinates = new HashMap<View, int[]>(); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); ViewCompat.setHasTransientState(v, true); oldCoordinates.put(v, new int[] { v.getTop(), v.getBottom() }); } /* Update the layout so the extra content becomes invisible.*/ view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, viewObject.getCollapsedHeight())); /* Add an onPreDraw listener. */ final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (!mShouldRemoveObserver) { /*Same as for expandingView, the parameters for setSelectionFromTop must * be determined such that the necessary cells of the ListView are rendered * and added to it.*/ mShouldRemoveObserver = true; int newTop = view.getTop(); int newBottom = view.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int deltaHeight = oldHeight - newHeight; mTranslate = getTopAndBottomTranslations(oldTop, oldBottom, deltaHeight, false); int currentTop = view.getTop(); int futureTop = oldTop + mTranslate[0]; int firstChildStartTop = getChildAt(0).getTop(); int firstVisiblePosition = getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = getChildCount(); for (i = 0; i < childCount; i++) { View v = getChildAt(i); int height = v.getBottom() - Math.max(0, v.getTop()); if (deltaTop - height > 0) { firstVisiblePosition++; deltaTop -= height; } else { break; } } if (i > 0) { firstChildStartTop = 0; } setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); requestLayout(); return false; } mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; int index = indexOfChild(view); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); int[] old = oldCoordinates.get(v); if (old != null) { /* If the cell was present in the ListView before the collapse and * after the collapse then the bounds are reset to their old values.*/ v.setTop(old[0]); v.setBottom(old[1]); ViewCompat.setHasTransientState(v, false); } else { /* If the cell is present in the ListView after the collapse but * not before the collapse then the bounds are calculated using * the bottom and top translation of the collapsing cell.*/ int delta = i > index ? yTranslateBottom : -yTranslateTop; v.setTop(v.getTop() + delta); v.setBottom(v.getBottom() + delta); } } final View expandingLayout = view.findViewById(R.id.expanding_layout); /* Animates all the cells present on the screen after the collapse. */ ArrayList<Animator> animations = new ArrayList<Animator>(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); if (v != view) { float diff = i > index ? -yTranslateBottom : yTranslateTop; animations.add(getAnimation(v, diff, diff)); } } /* Adds animation for collapsing the cell that was clicked. */ animations.add(getAnimation(view, yTranslateTop, -yTranslateBottom)); /* Adds an animation for fading out the extra content. */ animations.add(ObjectAnimator.ofFloat(expandingLayout, View.ALPHA, 1, 0)); /* Disabled the ListView for the duration of the animation.*/ setEnabled(false); setClickable(false); /* Play all the animations created above together at the same time. */ AnimatorSet s = new AnimatorSet(); s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { expandingLayout.setVisibility(View.GONE); view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT)); viewObject.setExpanded(false); setEnabled(true); setClickable(true); /* Note that alpha must be set back to 1 in case this view is reused * by a cell that was expanded, but not yet collapsed, so its state * should persist in an expanded state with the extra content visible.*/ expandingLayout.setAlpha(1); } }); s.start(); return true; } }); }
From source file:com.shoshin.paidpay.ExpandingListView.java
/** * This method collapses the view that was clicked and animates all the views * around it to close around the collapsing view. There are several steps required * to do this which are outlined below.//from w w w . j ava 2 s.c o m * * 1. Update the layout parameters of the view clicked so as to minimize its height * to the original collapsed (default) state. * 2. After invoking a layout, the listview will shift all the cells so as to display * them most efficiently. Therefore, during the first predraw pass, the listview * must be offset by some amount such that given the custom bound change upon * collapse, all the cells that need to be on the screen after the layout * are rendered by the listview. * 3. On the second predraw pass, all the items are first returned to their original * location (before the first layout). * 4. The collapsing view's bounds are animated to what the final values should be. * 5. The bounds above the collapsing view are animated downwards while the bounds * below the collapsing view are animated upwards. * 6. The extra text is faded out as its contents become visible throughout the * animation process. */ private void collapseView(final View view) { final ExpandableListItem viewObject = (ExpandableListItem) getItemAtPosition(getPositionForView(view)); /* Store the original top and bottom bounds of all the cells.*/ final int oldTop = view.getTop(); final int oldBottom = view.getBottom(); final HashMap<View, int[]> oldCoordinates = new HashMap<View, int[]>(); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); ViewCompat.setHasTransientState(v, true); oldCoordinates.put(v, new int[] { v.getTop(), v.getBottom() }); } /* Update the layout so the extra content becomes invisible.*/ view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, viewObject.getCollapsedHeight())); /* Add an onPreDraw listener. */ final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (!mShouldRemoveObserver) { /*Same as for expandingView, the parameters for setSelectionFromTop must * be determined such that the necessary cells of the ListView are rendered * and added to it.*/ mShouldRemoveObserver = true; int newTop = view.getTop(); int newBottom = view.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int deltaHeight = oldHeight - newHeight; mTranslate = getTopAndBottomTranslations(oldTop, oldBottom, deltaHeight, false); int currentTop = view.getTop(); int futureTop = oldTop + mTranslate[0]; int firstChildStartTop = getChildAt(0).getTop(); int firstVisiblePosition = getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = getChildCount(); for (i = 0; i < childCount; i++) { View v = getChildAt(i); int height = v.getBottom() - Math.max(0, v.getTop()); if (deltaTop - height > 0) { firstVisiblePosition++; deltaTop -= height; } else { break; } } if (i > 0) { firstChildStartTop = 0; } setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); requestLayout(); return false; } mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; int index = indexOfChild(view); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); int[] old = oldCoordinates.get(v); if (old != null) { /* If the cell was present in the ListView before the collapse and * after the collapse then the bounds are reset to their old values.*/ v.setTop(old[0]); v.setBottom(old[1]); ViewCompat.setHasTransientState(v, false); } else { /* If the cell is present in the ListView after the collapse but * not before the collapse then the bounds are calculated using * the bottom and top translation of the collapsing cell.*/ int delta = i > index ? yTranslateBottom : -yTranslateTop; v.setTop(v.getTop() + delta); v.setBottom(v.getBottom() + delta); } } final View expandingLayout = view.findViewById(R.id.expanding_layout); /* Animates all the cells present on the screen after the collapse. */ ArrayList<Animator> animations = new ArrayList<Animator>(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); if (v != view) { float diff = i > index ? -yTranslateBottom : yTranslateTop; animations.add(getAnimation(v, diff, diff)); } } /* Adds animation for collapsing the cell that was clicked. */ animations.add(getAnimation(view, yTranslateTop, -yTranslateBottom)); /* Adds an animation for fading out the extra content. */ //TODO animations.add(ObjectAnimator.ofFloat(expandingLayout, View.ALPHA, 1, 0)); /* Disabled the ListView for the duration of the animation.*/ setEnabled(false); setClickable(false); /* Play all the animations created above together at the same time. */ AnimatorSet s = new AnimatorSet(); s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { expandingLayout.setVisibility(View.GONE); view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT)); viewObject.setExpanded(false); setEnabled(true); setClickable(true); /* Note that alpha must be set back to 1 in case this view is reused * by a cell that was expanded, but not yet collapsed, so its state * should persist in an expanded state with the extra content visible.*/ expandingLayout.setAlpha(1); invalidateViews(); } }); s.start(); return true; } }); }
From source file:com.shoshin.paidpay.ExpandingListViewPayVia.java
/** * This method collapses the view that was clicked and animates all the views * around it to close around the collapsing view. There are several steps required * to do this which are outlined below.// ww w . j av a2 s. c o m * * 1. Update the layout parameters of the view clicked so as to minimize its height * to the original collapsed (default) state. * 2. After invoking a layout, the listview will shift all the cells so as to display * them most efficiently. Therefore, during the first predraw pass, the listview * must be offset by some amount such that given the custom bound change upon * collapse, all the cells that need to be on the screen after the layout * are rendered by the listview. * 3. On the second predraw pass, all the items are first returned to their original * location (before the first layout). * 4. The collapsing view's bounds are animated to what the final values should be. * 5. The bounds above the collapsing view are animated downwards while the bounds * below the collapsing view are animated upwards. * 6. The extra text is faded out as its contents become visible throughout the * animation process. */ private void collapseView(final View view) { final ExpandableCardsWithOffers viewObject = (ExpandableCardsWithOffers) getItemAtPosition( getPositionForView(view)); /* Store the original top and bottom bounds of all the cells.*/ final int oldTop = view.getTop(); final int oldBottom = view.getBottom(); final HashMap<View, int[]> oldCoordinates = new HashMap<View, int[]>(); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); ViewCompat.setHasTransientState(v, true); oldCoordinates.put(v, new int[] { v.getTop(), v.getBottom() }); } /* Update the layout so the extra content becomes invisible.*/ view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, viewObject.getCollapsedHeight())); /* Add an onPreDraw listener. */ final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (!mShouldRemoveObserver) { /*Same as for expandingView, the parameters for setSelectionFromTop must * be determined such that the necessary cells of the ListView are rendered * and added to it.*/ mShouldRemoveObserver = true; int newTop = view.getTop(); int newBottom = view.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int deltaHeight = oldHeight - newHeight; mTranslate = getTopAndBottomTranslations(oldTop, oldBottom, deltaHeight, false); int currentTop = view.getTop(); int futureTop = oldTop + mTranslate[0]; int firstChildStartTop = getChildAt(0).getTop(); int firstVisiblePosition = getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = getChildCount(); for (i = 0; i < childCount; i++) { View v = getChildAt(i); int height = v.getBottom() - Math.max(0, v.getTop()); if (deltaTop - height > 0) { firstVisiblePosition++; deltaTop -= height; } else { break; } } if (i > 0) { firstChildStartTop = 0; } setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); requestLayout(); return false; } mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; int index = indexOfChild(view); int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); int[] old = oldCoordinates.get(v); if (old != null) { /* If the cell was present in the ListView before the collapse and * after the collapse then the bounds are reset to their old values.*/ v.setTop(old[0]); v.setBottom(old[1]); ViewCompat.setHasTransientState(v, false); } else { /* If the cell is present in the ListView after the collapse but * not before the collapse then the bounds are calculated using * the bottom and top translation of the collapsing cell.*/ int delta = i > index ? yTranslateBottom : -yTranslateTop; v.setTop(v.getTop() + delta); v.setBottom(v.getBottom() + delta); } } final View expandingLayout = view.findViewById(R.id.expanding_layout); /* Animates all the cells present on the screen after the collapse. */ ArrayList<Animator> animations = new ArrayList<Animator>(); for (int i = 0; i < childCount; i++) { View v = getChildAt(i); if (v != view) { float diff = i > index ? -yTranslateBottom : yTranslateTop; animations.add(getAnimation(v, diff, diff)); } } /* Adds animation for collapsing the cell that was clicked. */ animations.add(getAnimation(view, yTranslateTop, -yTranslateBottom)); /* Adds an animation for fading out the extra content. */ //TODO animations.add(ObjectAnimator.ofFloat(expandingLayout, View.ALPHA, 1, 0)); /* Disabled the ListView for the duration of the animation.*/ setEnabled(false); setClickable(false); /* Play all the animations created above together at the same time. */ AnimatorSet s = new AnimatorSet(); s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { expandingLayout.setVisibility(View.GONE); view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT)); viewObject.setExpanded(false); setEnabled(true); setClickable(true); /* Note that alpha must be set back to 1 in case this view is reused * by a cell that was expanded, but not yet collapsed, so its state * should persist in an expanded state with the extra content visible.*/ expandingLayout.setAlpha(1); invalidateViews(); } }); s.start(); return true; } }); }