List of usage examples for android.view View setBottom
public final void setBottom(int bottom)
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);//from w w w . j a v a 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 ww w . 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 ww w . ja va 2s . com * * 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.// w ww.ja va2 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; } }); }
From source file:com.example.mike.birdalarm.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. * <p/>/* w w w .j a 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. */ public void collapseView(final View view) { final Alarm viewObject = (Alarm) 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<>(); 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 LayoutParams(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.options_layout); /* * Animates all the cells present on the screen after the * collapse. */ ArrayList<Animator> animations = new ArrayList<>(); 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 LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); viewObject.setExpandedState(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.fada21.android.hydralist.expandable.ExpandingListViewDelegate.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 av a 2s. c om * <li>Update the layout parameters of the view clicked so as to minimize its height to the original collapsed (default) state.</li> <li>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.</li> <li>On the second predraw pass, all the items are first returned to their original location (before the first layout).</li> <li>The * collapsing view's bounds are animated to what the final values should be.</li> <li>The bounds above the collapsing view are animated downwards while the * bounds below the collapsing view are animated upwards.</li> <li>The extra text is faded out as its contents become visible throughout the animation * process.</li> * * @param view * collapsing view * @param position * item position in list * @param id * item id */ private void collapseView(final View view, int position, long id) { final ExpandableListItem item = (ExpandableListItem) nlv.getItemAtPosition(nlv.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 = nlv.getChildCount(); for (int i = 0; i < childCount; i++) { View v = nlv.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, item.getCollapsedHeight())); /* Add an onPreDraw listener. */ final ViewTreeObserver observer = nlv.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 = nlv.getChildAt(0).getTop(); int firstVisiblePosition = nlv.getFirstVisiblePosition(); int deltaTop = currentTop - futureTop; int i; int childCount = nlv.getChildCount(); for (i = 0; i < childCount; i++) { View v = nlv.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; } nlv.setSelectionFromTop(firstVisiblePosition, firstChildStartTop - deltaTop); nlv.requestLayout(); return false; } mShouldRemoveObserver = false; observer.removeOnPreDrawListener(this); int yTranslateTop = mTranslate[0]; int yTranslateBottom = mTranslate[1]; int index = nlv.indexOfChild(view); int childCount = nlv.getChildCount(); for (int i = 0; i < childCount; i++) { View v = nlv.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(getExpandingAdapter().getExpandingHelper().getExpandingLayout()); /* 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 = nlv.getChildAt(i); if (v != view) { float diff = i > index ? -yTranslateBottom : yTranslateTop; if (diff != 0f) 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. */ nlv.setEnabled(false); nlv.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)); item.setExpanded(false); nlv.setEnabled(true); nlv.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.jforce.chapelhillnextbus.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. * <p/>/* w w w. j a v 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 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 LayoutParams(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 LayoutParams(LayoutParams.MATCH_PARENT, 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:graphic.expand_graphic.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. * <p/>/*from w ww.j av 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) { /* 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 LayoutParams(LayoutParams.MATCH_PARENT, viewObject.mCollapsedHeight)); /* 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 LayoutParams(LayoutParams.MATCH_PARENT, 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.lovely3x.eavlibrary.EasyAdapterView.java
/** * ???topbottom//from ww w . j a va2 s . co m * * @param offset ?????? */ public void offsetChildrenTopAndBottom(int offset) { final int count = getChildCount(); for (int i = 0; i < count; i++) { final View v = getChildAt(i); v.setTop(v.getTop() + offset); v.setBottom(v.getBottom() + offset); } invalidate(); }
From source file:com.modprobe.profit.ExpandingListView.java
/** * This method expands the view that was clicked and animates all the views * around it to make room for the expanding view. There are several steps required * to do this which are outlined below./*from w w w.ja va 2 s .c om*/ * * 1. Store the current top and bottom bounds of each visible item in the listview. * 2. Update the layout parameters of the selected view. In the context of this * method, the view should be originally collapsed and set to some custom height. * The layout parameters are updated so as to wrap the content of the additional * text that is to be displayed. * * After invoking a layout to take place, the listview will order all the items * such that there is space for each view. This layout will be independent of what * the bounds of the items were prior to the layout so two pre-draw passes will * be made. This is necessary because after the layout takes place, some views that * were visible before the layout may now be off bounds but a reference to these * views is required so the animation completes as intended. * * 3. The first predraw pass will set the bounds of all the visible items to * their original location before the layout took place and then force another * layout. Since the bounds of the cells cannot be set directly, the method * setSelectionFromTop can be used to achieve a very similar effect. * 4. The expanding view's bounds are animated to what the final values should be * from the original bounds. * 5. The bounds above the expanding view are animated upwards while the bounds * below the expanding view are animated downwards. * 6. The extra text is faded in as its contents become visible throughout the * animation process. * * It is important to note that the listview is disabled during the animation * because the scrolling behaviour is unpredictable if the bounds of the items * within the listview are not constant during the scroll. */ private void expandView(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 visible.*/ final View expandingLayout = view.findViewById(R.id.expanding_layout); expandingLayout.setVisibility(View.VISIBLE); /* Add an onPreDraw Listener to the listview. onPreDraw will get invoked after onLayout * and onMeasure have run but before anything has been drawn. This * means that the final post layout properties for all the items have already been * determined, but still have not been rendered onto the screen.*/ final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(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 = view.getTop(); int newBottom = view.getBottom(); int newHeight = newBottom - newTop; int oldHeight = oldBottom - oldTop; int delta = newHeight - oldHeight; mTranslate = getTopAndBottomTranslations(oldTop, oldBottom, delta, true); 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); /* 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>(); int index = indexOfChild(view); /* 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 != view) { 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(view, -yTranslateTop, yTranslateBottom)); /* Adds an animation for fading in the extra content. */ animations.add(ObjectAnimator.ofFloat(view.findViewById(R.id.expanding_layout), 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(); s.playTogether(animations); s.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { viewObject.setExpanded(true); setEnabled(true); setClickable(true); if (mViewsToDraw.size() > 0) { for (View v : mViewsToDraw) { ViewCompat.setHasTransientState(v, false); } } mViewsToDraw.clear(); } }); s.start(); return true; } }); }