List of usage examples for android.view ViewTreeObserver addOnPreDrawListener
public void addOnPreDrawListener(OnPreDrawListener listener)
From source file:com.audiokernel.euphonyrmt.fragments.SongsFragment.java
@Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.songs, container, false); mList = (AbsListView) view.findViewById(R.id.list); registerForContextMenu(mList);/* w w w . j a v a 2 s . c om*/ mList.setOnItemClickListener(this); mLoadingView = view.findViewById(R.id.loadingLayout); mLoadingTextView = (TextView) view.findViewById(R.id.loadingText); mNoResultView = view.findViewById(R.id.noResultLayout); mLoadingTextView.setText(getLoadingText()); final View headerView = inflater.inflate(R.layout.song_header, null, false); mCoverArt = (ImageView) view.findViewById(R.id.albumCover); if (mCoverArt != null) { mHeaderArtist = (TextView) view.findViewById(R.id.tracks_artist); mHeaderInfo = (TextView) view.findViewById(R.id.tracks_info); mCoverArtProgress = (ProgressBar) view.findViewById(R.id.albumCoverProgress); mAlbumMenu = (ImageButton) view.findViewById(R.id.album_menu); } else { mHeaderArtist = (TextView) headerView.findViewById(R.id.tracks_artist); mHeaderInfo = (TextView) headerView.findViewById(R.id.tracks_info); mCoverArt = (ImageView) headerView.findViewById(R.id.albumCover); mCoverArtProgress = (ProgressBar) headerView.findViewById(R.id.albumCoverProgress); mAlbumMenu = (ImageButton) headerView.findViewById(R.id.album_menu); } mCoverArtListener = new AlbumCoverDownloadListener(mCoverArt, mCoverArtProgress, false); mCoverHelper = new CoverAsyncHelper(); mCoverHelper.setCoverMaxSizeFromScreen(getActivity()); final ViewTreeObserver vto = mCoverArt.getViewTreeObserver(); vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (mCoverHelper != null) { mCoverHelper.setCachedCoverMaxSize(mCoverArt.getMeasuredHeight()); } return true; } }); mCoverHelper.addCoverDownloadListener(mCoverArtListener); ((TextView) headerView.findViewById(R.id.separator_title)).setText(R.string.songs); ((ListView) mList).addHeaderView(headerView, null, false); mPopupMenu = new PopupMenu(getActivity(), mAlbumMenu); mPopupMenu.getMenu().add(Menu.NONE, ADD, Menu.NONE, R.string.addAlbum); mPopupMenu.getMenu().add(Menu.NONE, ADD_REPLACE, Menu.NONE, R.string.addAndReplace); mPopupMenu.getMenu().add(Menu.NONE, ADD_REPLACE_PLAY, Menu.NONE, R.string.addAndReplacePlay); mPopupMenu.getMenu().add(Menu.NONE, ADD_PLAY, Menu.NONE, R.string.addAndPlay); mPopupMenu.getMenu().add(Menu.NONE, GOTO_ARTIST, Menu.NONE, R.string.goToArtist); mPopupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() { @Override public boolean onMenuItemClick(final MenuItem item) { final int itemId = item.getItemId(); if (itemId == GOTO_ARTIST) { final Intent intent = new Intent(getActivity(), SimpleLibraryActivity.class); intent.putExtra("artist", mAlbum.getArtist()); startActivityForResult(intent, -1); } else { mApp.oMPDAsyncHelper.execAsync(new Runnable() { @Override public void run() { boolean replace = false; boolean play = false; switch (itemId) { case ADD_REPLACE_PLAY: replace = true; play = true; break; case ADD_REPLACE: replace = true; break; case ADD_PLAY: play = true; break; default: break; } try { mApp.oMPDAsyncHelper.oMPD.add(mAlbum, replace, play); Tools.notifyUser(R.string.albumAdded, mAlbum); } catch (final IOException | MPDException e) { Log.e(TAG, "Failed to add, replace, play.", e); } } }); } return true; } }); mAlbumMenu.setOnTouchListener(PopupMenuCompat.getDragToOpenListener(mPopupMenu)); mAlbumMenu.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { mPopupMenu.show(); } }); mCoverPopupMenu = new PopupMenu(getActivity(), mCoverArt); mCoverPopupMenu.getMenu().add(POPUP_COVER_BLACKLIST, POPUP_COVER_BLACKLIST, 0, R.string.otherCover); mCoverPopupMenu.getMenu().add(POPUP_COVER_SELECTIVE_CLEAN, POPUP_COVER_SELECTIVE_CLEAN, 0, R.string.resetCover); mCoverPopupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() { @Override public boolean onMenuItemClick(final MenuItem item) { final int groupId = item.getGroupId(); boolean result = true; if (groupId == POPUP_COVER_BLACKLIST) { final AlbumInfo albumInfo = new AlbumInfo(mAlbum); CoverManager.getInstance().markWrongCover(albumInfo); updateCover(albumInfo); updateNowPlayingSmallFragment(albumInfo); } else if (groupId == POPUP_COVER_SELECTIVE_CLEAN) { final AlbumInfo albumInfo = new AlbumInfo(mAlbum); CoverManager.getInstance().clear(albumInfo); updateCover(albumInfo); updateNowPlayingSmallFragment(albumInfo); } else { result = false; } return result; } }); mCoverArt.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(final View v) { mCoverPopupMenu.show(); return false; } }); updateFromItems(); return view; }
From source file:com.amagi82.kerbalspaceapp.MissionPlanner.java
/** * This method animates all other views in the ListView container (not including ignoreView) into their final positions. It is called * after ignoreView has been removed from the adapter, but before layout has been run. The approach here is to figure out where * everything is now, then allow layout to run, then figure out where everything is after layout, and then to run animations between all * of those start/end positions.//from w ww . ja v a2 s. co m */ private void animateRemoval(final ListView listview, View viewToRemove) { int firstVisiblePosition = listview.getFirstVisiblePosition(); for (int i = 0; i < listview.getChildCount(); ++i) { View child = listview.getChildAt(i); if (child != viewToRemove) { int position = firstVisiblePosition + i; long itemId = mAdapter.getItemId(position); mItemIdTopMap.put(itemId, child.getTop()); } } // Delete the item from the adapter int position = mListView.getPositionForView(viewToRemove); mAdapter.remove(mAdapter.getItem(position)); mAdapter.notifyDataSetChanged(); refreshDeltaV(); final ViewTreeObserver observer = listview.getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { observer.removeOnPreDrawListener(this); boolean firstAnimation = true; int firstVisiblePosition = listview.getFirstVisiblePosition(); for (int i = 0; i < listview.getChildCount(); ++i) { final View child = listview.getChildAt(i); int position = firstVisiblePosition + i; long itemId = mAdapter.getItemId(position); Integer startTop = mItemIdTopMap.get(itemId); int top = child.getTop(); if (startTop != null) { if (startTop != top) { int delta = startTop - top; child.setTranslationY(delta); child.animate().setDuration(MOVE_DURATION).translationY(0); if (firstAnimation) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) { child.animate().setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mBackgroundContainer.hideBackground(); mSwiping = false; mListView.setEnabled(true); } }); } else { child.animate().withEndAction(new Runnable() { @Override public void run() { mBackgroundContainer.hideBackground(); mSwiping = false; mListView.setEnabled(true); } }); firstAnimation = false; } } } } else { // Animate new views along with the others. The catch is that they did not // exist in the start state, so we must calculate their starting position // based on neighboring views. int childHeight = child.getHeight() + listview.getDividerHeight(); startTop = top + (i > 0 ? childHeight : -childHeight); int delta = startTop - top; child.setTranslationY(delta); child.animate().setDuration(MOVE_DURATION).translationY(0); if (firstAnimation) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) { child.animate().setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mBackgroundContainer.hideBackground(); mSwiping = false; mListView.setEnabled(true); } }); } else { child.animate().withEndAction(new Runnable() { @Override public void run() { mBackgroundContainer.hideBackground(); mSwiping = false; mListView.setEnabled(true); } }); firstAnimation = false; } } } } mItemIdTopMap.clear(); return true; } }); }
From source file:fr.tvbarthel.apps.simpleweatherforcast.MainActivity.java
private void initRootPadding() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { final Resources resources = getResources(); final boolean isPortrait = resources.getBoolean(R.bool.is_portrait); final ActionBar actionBar = getSupportActionBar(); final ViewTreeObserver vto = mRootView.getViewTreeObserver(); if (vto.isAlive()) { vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override// w w w .j a v a 2 s . c o m public boolean onPreDraw() { mRootView.getViewTreeObserver().removeOnPreDrawListener(this); int paddingBottom = mRootView.getPaddingBottom(); int paddingTop = mRootView.getPaddingTop(); int paddingRight = mRootView.getPaddingRight(); int paddingLeft = mRootView.getPaddingLeft(); // Add the status bar height to the top padding. int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android"); if (resourceId > 0) { paddingTop += resources.getDimensionPixelSize(resourceId); } if (isPortrait) { // Add the navigation bar height to the bottom padding. resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android"); if (resourceId > 0) { paddingBottom += resources.getDimensionPixelSize(resourceId); } } else { // Add the navigation bar width to the right padding. resourceId = resources.getIdentifier("navigation_bar_width", "dimen", "android"); if (resourceId > 0) { paddingRight += resources.getDimensionPixelSize(resourceId); } } mRootView.setPadding(paddingLeft, paddingTop, paddingRight, paddingBottom); return true; } }); } } }
From source file:com.dgnt.dominionCardPicker.view.DynamicListView.java
/** * This method determines whether the hover cell has been shifted far enough * to invoke a cell swap. If so, then the respective cell swap candidate is * determined and the data set is changed. Upon posting a notification of the * data set change, a layout is invoked to place the cells in the right place. * Using a ViewTreeObserver and a corresponding OnPreDrawListener, we can * offset the cell being swapped to where it previously was and then animate it to * its new position./*from w w w.j ava2 s . c om*/ */ private void handleCellSwitch() { final int deltaY = mLastEventY - mDownY; int deltaYTotal = mHoverCellOriginalBounds.top + mTotalOffset + deltaY; View belowView = getViewForID(mBelowItemId); View mobileView = getViewForID(mMobileItemId); View aboveView = getViewForID(mAboveItemId); boolean isBelow = (belowView != null) && (deltaYTotal > belowView.getTop()); boolean isAbove = (aboveView != null) && (deltaYTotal < aboveView.getTop()); if (isBelow || isAbove) { final long switchItemID = isBelow ? mBelowItemId : mAboveItemId; View switchView = isBelow ? belowView : aboveView; final int originalItem = getPositionForView(mobileView); if (switchView == null) { updateNeighborViewsForID(mMobileItemId); return; } swapElements(list, originalItem, getPositionForView(switchView)); ((BaseAdapter) getAdapter()).notifyDataSetChanged(); mDownY = mLastEventY; final int switchViewStartTop = switchView.getTop(); mobileView.setVisibility(View.VISIBLE); switchView.setVisibility(View.VISIBLE); updateNeighborViewsForID(mMobileItemId); final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { public boolean onPreDraw() { observer.removeOnPreDrawListener(this); View switchView = getViewForID(switchItemID); mTotalOffset += deltaY; int switchViewNewTop = switchView.getTop(); int delta = switchViewStartTop - switchViewNewTop; switchView.setTranslationY(delta); ObjectAnimator animator = ObjectAnimator.ofFloat(switchView, View.TRANSLATION_Y, 0); animator.setDuration(MOVE_DURATION); animator.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./*w w w . j av a 2s . c om*/ * * 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.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.// w ww .j a v a2 s . c o m * * 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; } }); }
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 ww. j a v a 2 s.c om * * 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.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. j a v a2 s . com * * 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 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 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. */ //TODO 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; } }); }
From source file:com.example.customview.DynamicListView.java
/** * This method determines whether the hover cell has been shifted far enough * to invoke a cell swap. If so, then the respective cell swap candidate is * determined and the data set is changed. Upon posting a notification of the * data set change, a layout is invoked to place the cells in the right place. * Using a ViewTreeObserver and a corresponding OnPreDrawListener, we can * offset the cell being swapped to where it previously was and then animate it to * its new position.//ww w. ja v a 2 s.c om */ private void handleCellSwitch() { final int deltaY = mLastEventY - mDownY; int deltaYTotal = mHoverCellOriginalBounds.top + mTotalOffset + deltaY; View belowView = getViewForID(mBelowItemId); View mobileView = getViewForID(mMobileItemId); View aboveView = getViewForID(mAboveItemId); boolean isBelow = (belowView != null) && (deltaYTotal > belowView.getTop()); boolean isAbove = (aboveView != null) && (deltaYTotal < aboveView.getTop()); if (isBelow || isAbove) { final long switchItemID = isBelow ? mBelowItemId : mAboveItemId; View switchView = isBelow ? belowView : aboveView; final int originalItem = getPositionForView(mobileView); if (switchView == null) { updateNeighborViewsForID(mMobileItemId); return; } if (getPositionForView(switchView) == mPanelList.size() - 1) { return; } swapElements(mPanelList, originalItem, getPositionForView(switchView)); ((BaseAdapter) getAdapter()).notifyDataSetChanged(); mDownY = mLastEventY; final int switchViewStartTop = switchView.getTop(); mobileView.setVisibility(View.VISIBLE); switchView.setVisibility(View.INVISIBLE); updateNeighborViewsForID(mMobileItemId); final ViewTreeObserver observer = getViewTreeObserver(); observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { public boolean onPreDraw() { observer.removeOnPreDrawListener(this); View switchView = getViewForID(switchItemID); mTotalOffset += deltaY; int switchViewNewTop = switchView.getTop(); int delta = switchViewStartTop - switchViewNewTop; switchView.setTranslationY(delta); ObjectAnimator animator = ObjectAnimator.ofFloat(switchView, View.TRANSLATION_Y, 0); animator.setDuration(MOVE_DURATION); animator.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.//from w w w . ja va 2 s. co 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; } }); }