| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view.transition; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.TimeInterpolator; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| import android.util.LongSparseArray; |
| import android.util.Pair; |
| import android.util.SparseArray; |
| import android.view.SurfaceView; |
| import android.view.TextureView; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewOverlay; |
| import android.widget.ListView; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A Transition holds information about animations that will be run on its |
| * targets during a scene change. Subclasses of this abstract class may |
| * choreograph several child transitions ({@link TransitionGroup} or they may |
| * perform custom animations themselves. Any Transition has two main jobs: |
| * (1) capture property values, and (2) play animations based on changes to |
| * captured property values. A custom transition knows what property values |
| * on View objects are of interest to it, and also knows how to animate |
| * changes to those values. For example, the {@link Fade} transition tracks |
| * changes to visibility-related properties and is able to construct and run |
| * animations that fade items in or out based on changes to those properties. |
| * |
| * <p>Note: Transitions may not work correctly with either {@link SurfaceView} |
| * or {@link TextureView}, due to the way that these views are displayed |
| * on the screen. For SurfaceView, the problem is that the view is updated from |
| * a non-UI thread, so changes to the view due to transitions (such as moving |
| * and resizing the view) may be out of sync with the display inside those bounds. |
| * TextureView is more compatible with transitions in general, but some |
| * specific transitions (such as {@link Crossfade}) may not be compatible |
| * with TextureView because they rely on {@link ViewOverlay} functionality, |
| * which does not currently work with TextureView.</p> |
| */ |
| public abstract class Transition implements Cloneable { |
| |
| private static final String LOG_TAG = "Transition"; |
| static final boolean DBG = false; |
| |
| long mStartDelay = -1; |
| long mDuration = -1; |
| TimeInterpolator mInterpolator = null; |
| int[] mTargetIds; |
| View[] mTargets; |
| private TransitionValuesMaps mStartValues = new TransitionValuesMaps(); |
| private TransitionValuesMaps mEndValues = new TransitionValuesMaps(); |
| TransitionGroup mParent = null; |
| |
| // Scene Root is set at play() time in the cloned Transition |
| ViewGroup mSceneRoot = null; |
| |
| // Used to carry data between setup() and play(), cleared before every scene transition |
| private ArrayList<TransitionValues> mPlayStartValuesList = new ArrayList<TransitionValues>(); |
| private ArrayList<TransitionValues> mPlayEndValuesList = new ArrayList<TransitionValues>(); |
| |
| // Track all animators in use in case the transition gets canceled and needs to |
| // cancel running animators |
| private ArrayList<Animator> mCurrentAnimators = new ArrayList<Animator>(); |
| |
| // Number of per-target instances of this Transition currently running. This count is |
| // determined by calls to startTransition() and endTransition() |
| int mNumInstances = 0; |
| |
| |
| |
| // The set of listeners to be sent transition lifecycle events. |
| ArrayList<TransitionListener> mListeners = null; |
| |
| // The set of animators collected from calls to play(), to be run in runAnimations() |
| ArrayMap<Pair<TransitionValues, TransitionValues>, Animator> mAnimatorMap = |
| new ArrayMap<Pair<TransitionValues, TransitionValues>, Animator>(); |
| |
| /** |
| * Constructs a Transition object with no target objects. A transition with |
| * no targets defaults to running on all target objects in the scene hierarchy |
| * (if the transition is not contained in a TransitionGroup), or all target |
| * objects passed down from its parent (if it is in a TransitionGroup). |
| */ |
| public Transition() {} |
| |
| /** |
| * Sets the duration of this transition. By default, there is no duration |
| * (indicated by a negative number), which means that the Animator created by |
| * the transition will have its own specified duration. If the duration of a |
| * Transition is set, that duration will override the Animator duration. |
| * |
| * @param duration The length of the animation, in milliseconds. |
| * @return This transition object. |
| */ |
| public Transition setDuration(long duration) { |
| mDuration = duration; |
| return this; |
| } |
| |
| public long getDuration() { |
| return mDuration; |
| } |
| |
| /** |
| * Sets the startDelay of this transition. By default, there is no delay |
| * (indicated by a negative number), which means that the Animator created by |
| * the transition will have its own specified startDelay. If the delay of a |
| * Transition is set, that delay will override the Animator delay. |
| * |
| * @param startDelay The length of the delay, in milliseconds. |
| */ |
| public void setStartDelay(long startDelay) { |
| mStartDelay = startDelay; |
| } |
| |
| public long getStartDelay() { |
| return mStartDelay; |
| } |
| |
| /** |
| * Sets the interpolator of this transition. By default, the interpolator |
| * is null, which means that the Animator created by the transition |
| * will have its own specified interpolator. If the interpolator of a |
| * Transition is set, that interpolator will override the Animator interpolator. |
| * |
| * @param interpolator The time interpolator used by the transition |
| */ |
| public void setInterpolator(TimeInterpolator interpolator) { |
| mInterpolator = interpolator; |
| } |
| |
| public TimeInterpolator getInterpolator() { |
| return mInterpolator; |
| } |
| |
| /** |
| * This method is called by the transition's parent (all the way up to the |
| * topmost Transition in the hierarchy) with the sceneRoot and start/end |
| * values that the transition may need to set up initial target values |
| * and construct an appropriate animation. For example, if an overall |
| * Transition is a {@link TransitionGroup} consisting of several |
| * child transitions in sequence, then some of the child transitions may |
| * want to set initial values on target views prior to the overall |
| * Transition commencing, to put them in an appropriate state for the |
| * delay between that start and the child Transition start time. For |
| * example, a transition that fades an item in may wish to set the starting |
| * alpha value to 0, to avoid it blinking in prior to the transition |
| * actually starting the animation. This is necessary because the scene |
| * change that triggers the Transition will automatically set the end-scene |
| * on all target views, so a Transition that wants to animate from a |
| * different value should set that value prior to returning from this method. |
| * |
| * <p>Additionally, a Transition can perform logic to determine whether |
| * the transition needs to run on the given target and start/end values. |
| * For example, a transition that resizes objects on the screen may wish |
| * to avoid running for views which are not present in either the start |
| * or end scenes. A return value of <code>null</code> indicates that |
| * no animation should run. The default implementation returns null.</p> |
| * |
| * <p>If there is an animator created and returned from this method, the |
| * transition mechanism will apply any applicable duration, startDelay, |
| * and interpolator to that animation and start it. A return value of |
| * <code>null</code> indicates that no animation should run. The default |
| * implementation returns null.</p> |
| * |
| * <p>The method is called for every applicable target object, which is |
| * stored in the {@link TransitionValues#view} field.</p> |
| * |
| * @param sceneRoot |
| * @param startValues |
| * @param endValues |
| * @return A non-null Animator to be started at the appropriate time in the |
| * overall transition for this scene change, null otherwise. |
| */ |
| protected Animator play(ViewGroup sceneRoot, TransitionValues startValues, |
| TransitionValues endValues) { |
| return null; |
| } |
| |
| /** |
| * This version of play() is called with the entire set of start/end |
| * values. The implementation in Transition iterates through these lists |
| * and calls {@link #play(ViewGroup, TransitionValues, TransitionValues)} |
| * with each set of start/end values on this transition. The |
| * TransitionGroup subclass overrides this method and delegates it to |
| * each of its children in succession. |
| * |
| * @hide |
| */ |
| protected void play(ViewGroup sceneRoot, TransitionValuesMaps startValues, |
| TransitionValuesMaps endValues) { |
| if (DBG) { |
| Log.d(LOG_TAG, "play() for " + this); |
| } |
| mPlayStartValuesList.clear(); |
| mPlayEndValuesList.clear(); |
| ArrayMap<View, TransitionValues> endCopy = |
| new ArrayMap<View, TransitionValues>(endValues.viewValues); |
| SparseArray<TransitionValues> endIdCopy = |
| new SparseArray<TransitionValues>(endValues.idValues.size()); |
| for (int i = 0; i < endValues.idValues.size(); ++i) { |
| int id = endValues.idValues.keyAt(i); |
| endIdCopy.put(id, endValues.idValues.valueAt(i)); |
| } |
| LongSparseArray<TransitionValues> endItemIdCopy = |
| new LongSparseArray<TransitionValues>(endValues.itemIdValues.size()); |
| for (int i = 0; i < endValues.itemIdValues.size(); ++i) { |
| long id = endValues.itemIdValues.keyAt(i); |
| endItemIdCopy.put(id, endValues.itemIdValues.valueAt(i)); |
| } |
| // Walk through the start values, playing everything we find |
| // Remove from the end set as we go |
| ArrayList<TransitionValues> startValuesList = new ArrayList<TransitionValues>(); |
| ArrayList<TransitionValues> endValuesList = new ArrayList<TransitionValues>(); |
| for (View view : startValues.viewValues.keySet()) { |
| TransitionValues start = null; |
| TransitionValues end = null; |
| boolean isInListView = false; |
| if (view.getParent() instanceof ListView) { |
| isInListView = true; |
| } |
| if (!isInListView) { |
| int id = view.getId(); |
| start = startValues.viewValues.get(view) != null ? |
| startValues.viewValues.get(view) : startValues.idValues.get(id); |
| if (endValues.viewValues.get(view) != null) { |
| end = endValues.viewValues.get(view); |
| endCopy.remove(view); |
| } else { |
| end = endValues.idValues.get(id); |
| View removeView = null; |
| for (View viewToRemove : endCopy.keySet()) { |
| if (viewToRemove.getId() == id) { |
| removeView = viewToRemove; |
| } |
| } |
| if (removeView != null) { |
| endCopy.remove(removeView); |
| } |
| } |
| endIdCopy.remove(id); |
| if (isValidTarget(view, id)) { |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| } else { |
| ListView parent = (ListView) view.getParent(); |
| if (parent.getAdapter().hasStableIds()) { |
| int position = parent.getPositionForView(view); |
| long itemId = parent.getItemIdAtPosition(position); |
| start = startValues.itemIdValues.get(itemId); |
| endItemIdCopy.remove(itemId); |
| // TODO: deal with targetIDs for itemIDs for ListView items |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| } |
| } |
| int startItemIdCopySize = startValues.itemIdValues.size(); |
| for (int i = 0; i < startItemIdCopySize; ++i) { |
| long id = startValues.itemIdValues.keyAt(i); |
| if (isValidTarget(null, id)) { |
| TransitionValues start = startValues.itemIdValues.get(id); |
| TransitionValues end = endValues.itemIdValues.get(id); |
| endItemIdCopy.remove(id); |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| } |
| // Now walk through the remains of the end set |
| for (View view : endCopy.keySet()) { |
| int id = view.getId(); |
| if (isValidTarget(view, id)) { |
| TransitionValues start = startValues.viewValues.get(view) != null ? |
| startValues.viewValues.get(view) : startValues.idValues.get(id); |
| TransitionValues end = endCopy.get(view); |
| endIdCopy.remove(id); |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| } |
| int endIdCopySize = endIdCopy.size(); |
| for (int i = 0; i < endIdCopySize; ++i) { |
| int id = endIdCopy.keyAt(i); |
| if (isValidTarget(null, id)) { |
| TransitionValues start = startValues.idValues.get(id); |
| TransitionValues end = endIdCopy.get(id); |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| } |
| int endItemIdCopySize = endItemIdCopy.size(); |
| for (int i = 0; i < endItemIdCopySize; ++i) { |
| long id = endItemIdCopy.keyAt(i); |
| // TODO: Deal with targetIDs and itemIDs |
| TransitionValues start = startValues.itemIdValues.get(id); |
| TransitionValues end = endItemIdCopy.get(id); |
| startValuesList.add(start); |
| endValuesList.add(end); |
| } |
| for (int i = 0; i < startValuesList.size(); ++i) { |
| TransitionValues start = startValuesList.get(i); |
| TransitionValues end = endValuesList.get(i); |
| // Only bother trying to animate with values that differ between start/end |
| if (start != null || end != null) { |
| if (start == null || !start.equals(end)) { |
| if (DBG) { |
| View view = (end != null) ? end.view : start.view; |
| Log.d(LOG_TAG, " differing start/end values for view " + |
| view); |
| if (start == null || end == null) { |
| if (start == null) { |
| Log.d(LOG_TAG, " " + ((start == null) ? |
| "start null, end non-null" : "start non-null, end null")); |
| } |
| } else { |
| for (String key : start.values.keySet()) { |
| Object startValue = start.values.get(key); |
| Object endValue = end.values.get(key); |
| if (startValue != endValue && !startValue.equals(endValue)) { |
| Log.d(LOG_TAG, " " + key + ": start(" + startValue + |
| "), end(" + endValue +")"); |
| } |
| } |
| } |
| } |
| // TODO: what to do about targetIds and itemIds? |
| Animator animator = play(sceneRoot, start, end); |
| if (animator != null) { |
| mAnimatorMap.put(new Pair(start, end), animator); |
| // Note: we've already done the check against targetIDs in these lists |
| mPlayStartValuesList.add(start); |
| mPlayEndValuesList.add(end); |
| } |
| } else if (DBG) { |
| View view = (end != null) ? end.view : start.view; |
| Log.d(LOG_TAG, " No change for view " + view); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Internal utility method for checking whether a given view/id |
| * is valid for this transition, where "valid" means that either |
| * the Transition has no target/targetId list (the default, in which |
| * cause the transition should act on all views in the hiearchy), or |
| * the given view is in the target list or the view id is in the |
| * targetId list. If the target parameter is null, then the target list |
| * is not checked (this is in the case of ListView items, where the |
| * views are ignored and only the ids are used). |
| */ |
| boolean isValidTarget(View target, long targetId) { |
| if (mTargetIds == null && mTargets == null) { |
| return true; |
| } |
| if (mTargetIds != null) { |
| for (int i = 0; i < mTargetIds.length; ++i) { |
| if (mTargetIds[i] == targetId) { |
| return true; |
| } |
| } |
| } |
| if (target != null && mTargets != null) { |
| for (int i = 0; i < mTargets.length; ++i) { |
| if (mTargets[i] == target) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * This is called internally once all animations have been set up by the |
| * transition hierarchy. \ |
| * |
| * @hide |
| */ |
| protected void runAnimations() { |
| if (DBG && mPlayStartValuesList.size() > 0) { |
| Log.d(LOG_TAG, "runAnimations (" + mPlayStartValuesList.size() + ") on " + this); |
| } |
| startTransition(); |
| // Now walk the list of TransitionValues, calling play for each pair |
| for (int i = 0; i < mPlayStartValuesList.size(); ++i) { |
| TransitionValues start = mPlayStartValuesList.get(i); |
| TransitionValues end = mPlayEndValuesList.get(i); |
| Animator anim = mAnimatorMap.get(new Pair(start, end)); |
| if (DBG) { |
| Log.d(LOG_TAG, " anim: " + anim); |
| } |
| startTransition(); |
| runAnimator(anim); |
| } |
| mPlayStartValuesList.clear(); |
| mPlayEndValuesList.clear(); |
| mAnimatorMap.clear(); |
| endTransition(); |
| } |
| |
| private void runAnimator(Animator animator) { |
| if (animator != null) { |
| // TODO: could be a single listener instance for all of them since it uses the param |
| animator.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationStart(Animator animation) { |
| mCurrentAnimators.add(animation); |
| } |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| mCurrentAnimators.remove(animation); |
| } |
| }); |
| animate(animator); |
| } |
| } |
| |
| /** |
| * Captures the current scene of values for the properties that this |
| * transition monitors. These values can be either the start or end |
| * values used in a subsequent call to |
| * {@link #play(ViewGroup, TransitionValues, TransitionValues)}, as indicated by |
| * <code>start</code>. The main concern for an implementation is what the |
| * properties are that the transition cares about and what the values are |
| * for all of those properties. The start and end values will be compared |
| * later during the |
| * {@link #play(android.view.ViewGroup, TransitionValues, TransitionValues)} |
| * method to determine what, if any, animations, should be run. |
| * |
| * @param transitionValues The holder for any values that the Transition |
| * wishes to store. Values are stored in the <code>values</code> field |
| * of this TransitionValues object and are keyed from |
| * a String value. For example, to store a view's rotation value, |
| * a transition might call |
| * <code>transitionValues.values.put("appname:transitionname:rotation", |
| * view.getRotation())</code>. The target view will already be stored in |
| * the transitionValues structure when this method is called. |
| */ |
| protected abstract void captureValues(TransitionValues transitionValues, boolean start); |
| |
| /** |
| * Sets the ids of target views that this Transition is interested in |
| * animating. By default, there are no targetIds, and a Transition will |
| * listen for changes on every view in the hierarchy below the sceneRoot |
| * of the Scene being transitioned into. Setting targetIDs constrains |
| * the Transition to only listen for, and act on, views with these IDs. |
| * Views with different IDs, or no IDs whatsoever, will be ignored. |
| * |
| * @see View#getId() |
| * @param targetIds A list of IDs which specify the set of Views on which |
| * the Transition will act. |
| * @return Transition The Transition on which the targetIds have been set. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionGroup.addTransitions(new Fade()).setTargetIds(someId);</code> |
| */ |
| public Transition setTargetIds(int... targetIds) { |
| int numTargets = targetIds.length; |
| mTargetIds = new int[numTargets]; |
| System.arraycopy(targetIds, 0, mTargetIds, 0, numTargets); |
| return this; |
| } |
| |
| /** |
| * Sets the target view instances that this Transition is interested in |
| * animating. By default, there are no targets, and a Transition will |
| * listen for changes on every view in the hierarchy below the sceneRoot |
| * of the Scene being transitioned into. Setting targets constrains |
| * the Transition to only listen for, and act on, these views. |
| * All other views will be ignored. |
| * |
| * <p>The target list is like the {@link #setTargetIds(int...) targetId} |
| * list except this list specifies the actual View instances, not the ids |
| * of the views. This is an important distinction when scene changes involve |
| * view hierarchies which have been inflated separately; different views may |
| * share the same id but not actually be the same instance. If the transition |
| * should treat those views as the same, then seTargetIds() should be used |
| * instead of setTargets(). If, on the other hand, scene changes involve |
| * changes all within the same view hierarchy, among views which do not |
| * necessary have ids set on them, then the target list may be more |
| * convenient.</p> |
| * |
| * @see #setTargetIds(int...) |
| * @param targets A list of Views on which the Transition will act. |
| * @return Transition The Transition on which the targets have been set. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionGroup.addTransitions(new Fade()).setTargets(someView);</code> |
| */ |
| public Transition setTargets(View... targets) { |
| int numTargets = targets.length; |
| mTargets = new View[numTargets]; |
| System.arraycopy(targets, 0, mTargets, 0, numTargets); |
| return this; |
| } |
| |
| /** |
| * Returns the array of target IDs that this transition limits itself to |
| * tracking and animating. If the array is null for both this method and |
| * {@link #getTargets()}, then this transition is |
| * not limited to specific views, and will handle changes to any views |
| * in the hierarchy of a scene change. |
| * |
| * @return the list of target IDs |
| */ |
| public int[] getTargetIds() { |
| return mTargetIds; |
| } |
| |
| /** |
| * Returns the array of target views that this transition limits itself to |
| * tracking and animating. If the array is null for both this method and |
| * {@link #getTargetIds()}, then this transition is |
| * not limited to specific views, and will handle changes to any views |
| * in the hierarchy of a scene change. |
| * |
| * @return the list of target views |
| */ |
| public View[] getTargets() { |
| return mTargets; |
| } |
| |
| /** |
| * Recursive method that captures values for the given view and the |
| * hierarchy underneath it. |
| * @param sceneRoot The root of the view hierarchy being captured |
| * @param start true if this capture is happening before the scene change, |
| * false otherwise |
| */ |
| void captureValues(ViewGroup sceneRoot, boolean start) { |
| if (start) { |
| mStartValues.viewValues.clear(); |
| mStartValues.idValues.clear(); |
| mStartValues.itemIdValues.clear(); |
| } else { |
| mEndValues.viewValues.clear(); |
| mEndValues.idValues.clear(); |
| mEndValues.itemIdValues.clear(); |
| } |
| if (mTargetIds != null && mTargetIds.length > 0 || |
| mTargets != null && mTargets.length > 0) { |
| if (mTargetIds != null) { |
| for (int i = 0; i < mTargetIds.length; ++i) { |
| int id = mTargetIds[i]; |
| View view = sceneRoot.findViewById(id); |
| if (view != null) { |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| captureValues(values, start); |
| if (start) { |
| mStartValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mStartValues.idValues.put(id, values); |
| } |
| } else { |
| mEndValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mEndValues.idValues.put(id, values); |
| } |
| } |
| } |
| } |
| } |
| if (mTargets != null) { |
| for (int i = 0; i < mTargets.length; ++i) { |
| View view = mTargets[i]; |
| if (view != null) { |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| captureValues(values, start); |
| if (start) { |
| mStartValues.viewValues.put(view, values); |
| } else { |
| mEndValues.viewValues.put(view, values); |
| } |
| } |
| } |
| } |
| } else { |
| captureHierarchy(sceneRoot, start); |
| } |
| } |
| |
| /** |
| * Recursive method which captures values for an entire view hierarchy, |
| * starting at some root view. Transitions without targetIDs will use this |
| * method to capture values for all possible views. |
| * |
| * @param view The view for which to capture values. Children of this View |
| * will also be captured, recursively down to the leaf nodes. |
| * @param start true if values are being captured in the start scene, false |
| * otherwise. |
| */ |
| private void captureHierarchy(View view, boolean start) { |
| if (view == null) { |
| return; |
| } |
| boolean isListViewItem = false; |
| if (view.getParent() instanceof ListView) { |
| isListViewItem = true; |
| } |
| if (isListViewItem && !((ListView) view.getParent()).getAdapter().hasStableIds()) { |
| // ignore listview children unless we can track them with stable IDs |
| return; |
| } |
| long id; |
| if (!isListViewItem) { |
| id = view.getId(); |
| } else { |
| ListView listview = (ListView) view.getParent(); |
| int position = listview.getPositionForView(view); |
| id = listview.getItemIdAtPosition(position); |
| view.setHasTransientState(true); |
| } |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| captureValues(values, start); |
| if (start) { |
| if (!isListViewItem) { |
| mStartValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mStartValues.idValues.put((int) id, values); |
| } |
| } else { |
| mStartValues.itemIdValues.put(id, values); |
| } |
| } else { |
| if (!isListViewItem) { |
| mEndValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mEndValues.idValues.put((int) id, values); |
| } |
| } else { |
| mEndValues.itemIdValues.put(id, values); |
| } |
| } |
| if (view instanceof ViewGroup) { |
| ViewGroup parent = (ViewGroup) view; |
| for (int i = 0; i < parent.getChildCount(); ++i) { |
| captureHierarchy(parent.getChildAt(i), start); |
| } |
| } |
| } |
| |
| /** |
| * This method can be called by transitions to get the TransitionValues for |
| * any particular view during the transition-playing process. This might be |
| * necessary, for example, to query the before/after state of related views |
| * for a given transition. |
| */ |
| protected TransitionValues getTransitionValues(View view, boolean start) { |
| if (mParent != null) { |
| return mParent.getTransitionValues(view, start); |
| } |
| TransitionValuesMaps valuesMaps = start ? mStartValues : mEndValues; |
| TransitionValues values = valuesMaps.viewValues.get(view); |
| if (values == null) { |
| int id = view.getId(); |
| if (id >= 0) { |
| values = valuesMaps.idValues.get(id); |
| } |
| if (values == null && view.getParent() instanceof ListView) { |
| ListView listview = (ListView) view.getParent(); |
| int position = listview.getPositionForView(view); |
| long itemId = listview.getItemIdAtPosition(position); |
| values = valuesMaps.itemIdValues.get(itemId); |
| } |
| // TODO: Doesn't handle the case where a view was parented to a |
| // ListView (with an itemId), but no longer is |
| } |
| return values; |
| } |
| |
| /** |
| * Called by TransitionManager to play the transition. This calls |
| * play() to set things up and create all of the animations and then |
| * runAnimations() to actually start the animations. |
| */ |
| void playTransition(ViewGroup sceneRoot) { |
| // setup() must be called on entire transition hierarchy and set of views |
| // before calling play() on anything; every transition needs a chance to set up |
| // target views appropriately before transitions begin running |
| play(sceneRoot, mStartValues, mEndValues); |
| runAnimations(); |
| } |
| |
| /** |
| * This is a utility method used by subclasses to handle standard parts of |
| * setting up and running an Animator: it sets the {@link #getDuration() |
| * duration} and the {@link #getStartDelay() startDelay}, starts the |
| * animation, and, when the animator ends, calls {@link #endTransition()}. |
| * |
| * @param animator The Animator to be run during this transition. |
| * |
| * @hide |
| */ |
| protected void animate(Animator animator) { |
| // TODO: maybe pass auto-end as a boolean parameter? |
| if (animator == null) { |
| endTransition(); |
| } else { |
| if (getDuration() >= 0) { |
| animator.setDuration(getDuration()); |
| } |
| if (getStartDelay() >= 0) { |
| animator.setStartDelay(getStartDelay()); |
| } |
| if (getInterpolator() != null) { |
| animator.setInterpolator(getInterpolator()); |
| } |
| animator.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| endTransition(); |
| animation.removeListener(this); |
| } |
| }); |
| animator.start(); |
| } |
| } |
| |
| /** |
| * Subclasses may override to receive notice of when the transition starts. |
| * This is equivalent to listening for the |
| * {@link TransitionListener#onTransitionStart(Transition)} callback. |
| */ |
| protected void onTransitionStart() { |
| } |
| |
| /** |
| * Subclasses may override to receive notice of when the transition is |
| * canceled. This is equivalent to listening for the |
| * {@link TransitionListener#onTransitionCancel(Transition)} callback. |
| */ |
| protected void onTransitionCancel() { |
| } |
| |
| /** |
| * Subclasses may override to receive notice of when the transition ends. |
| * This is equivalent to listening for the |
| * {@link TransitionListener#onTransitionEnd(Transition)} callback. |
| */ |
| protected void onTransitionEnd() { |
| } |
| |
| /** |
| * This method is called automatically by the transition and |
| * TransitionGroup classes prior to a Transition subclass starting; |
| * subclasses should not need to call it directly. |
| * |
| * @hide |
| */ |
| protected void startTransition() { |
| if (mNumInstances == 0) { |
| onTransitionStart(); |
| if (mListeners != null && mListeners.size() > 0) { |
| ArrayList<TransitionListener> tmpListeners = |
| (ArrayList<TransitionListener>) mListeners.clone(); |
| int numListeners = tmpListeners.size(); |
| for (int i = 0; i < numListeners; ++i) { |
| tmpListeners.get(i).onTransitionStart(this); |
| } |
| } |
| } |
| mNumInstances++; |
| } |
| |
| /** |
| * This method is called automatically by the Transition and |
| * TransitionGroup classes when a transition finishes, either because |
| * a transition did nothing (returned a null Animator from |
| * {@link Transition#play(ViewGroup, TransitionValues, |
| * TransitionValues)}) or because the transition returned a valid |
| * Animator and endTransition() was called in the onAnimationEnd() |
| * callback of the AnimatorListener. |
| * |
| * @hide |
| */ |
| protected void endTransition() { |
| --mNumInstances; |
| if (mNumInstances == 0) { |
| onTransitionEnd(); |
| if (mListeners != null && mListeners.size() > 0) { |
| ArrayList<TransitionListener> tmpListeners = |
| (ArrayList<TransitionListener>) mListeners.clone(); |
| int numListeners = tmpListeners.size(); |
| for (int i = 0; i < numListeners; ++i) { |
| tmpListeners.get(i).onTransitionEnd(this); |
| } |
| } |
| for (int i = 0; i < mStartValues.itemIdValues.size(); ++i) { |
| TransitionValues tv = mStartValues.itemIdValues.valueAt(i); |
| View v = tv.view; |
| if (v.hasTransientState()) { |
| v.setHasTransientState(false); |
| } |
| } |
| for (int i = 0; i < mEndValues.itemIdValues.size(); ++i) { |
| TransitionValues tv = mEndValues.itemIdValues.valueAt(i); |
| View v = tv.view; |
| if (v.hasTransientState()) { |
| v.setHasTransientState(false); |
| } |
| } |
| } |
| } |
| |
| /** |
| * This method cancels a transition that is currently running. |
| * Implementation TBD. |
| */ |
| protected void cancelTransition() { |
| // TODO: how does this work with instances? |
| // TODO: this doesn't actually do *anything* yet |
| int numAnimators = mCurrentAnimators.size(); |
| for (int i = numAnimators - 1; i >= 0; i--) { |
| Animator animator = mCurrentAnimators.get(i); |
| animator.cancel(); |
| } |
| onTransitionCancel(); |
| if (mListeners != null && mListeners.size() > 0) { |
| ArrayList<TransitionListener> tmpListeners = |
| (ArrayList<TransitionListener>) mListeners.clone(); |
| int numListeners = tmpListeners.size(); |
| for (int i = 0; i < numListeners; ++i) { |
| tmpListeners.get(i).onTransitionCancel(this); |
| } |
| } |
| } |
| |
| /** |
| * Adds a listener to the set of listeners that are sent events through the |
| * life of an animation, such as start, repeat, and end. |
| * |
| * @param listener the listener to be added to the current set of listeners |
| * for this animation. |
| */ |
| public void addListener(TransitionListener listener) { |
| if (mListeners == null) { |
| mListeners = new ArrayList<TransitionListener>(); |
| } |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Removes a listener from the set listening to this animation. |
| * |
| * @param listener the listener to be removed from the current set of |
| * listeners for this transition. |
| */ |
| public void removeListener(TransitionListener listener) { |
| if (mListeners == null) { |
| return; |
| } |
| mListeners.remove(listener); |
| if (mListeners.size() == 0) { |
| mListeners = null; |
| } |
| } |
| |
| /** |
| * Gets the set of {@link TransitionListener} objects that are currently |
| * listening for events on this <code>Transition</code> object. |
| * |
| * @return ArrayList<TransitionListener> The set of listeners. |
| */ |
| public ArrayList<TransitionListener> getListeners() { |
| return mListeners; |
| } |
| |
| void setSceneRoot(ViewGroup sceneRoot) { |
| mSceneRoot = sceneRoot; |
| } |
| |
| @Override |
| public String toString() { |
| return toString(""); |
| } |
| |
| @Override |
| public Transition clone() { |
| Transition clone = null; |
| try { |
| clone = (Transition) super.clone(); |
| } catch (CloneNotSupportedException e) {} |
| |
| return clone; |
| } |
| |
| String toString(String indent) { |
| String result = indent + getClass().getSimpleName() + "@" + |
| Integer.toHexString(hashCode()) + ": "; |
| if (mDuration != -1) { |
| result += "dur(" + mDuration + ") "; |
| } |
| if (mStartDelay != -1) { |
| result += "dly(" + mStartDelay + ") "; |
| } |
| if (mInterpolator != null) { |
| result += "interp(" + mInterpolator + ") "; |
| } |
| if (mTargetIds != null || mTargets != null) { |
| result += "tgts("; |
| if (mTargetIds != null) { |
| for (int i = 0; i < mTargetIds.length; ++i) { |
| if (i > 0) { |
| result += ", "; |
| } |
| result += mTargetIds[i]; |
| } |
| } |
| if (mTargets != null) { |
| for (int i = 0; i < mTargets.length; ++i) { |
| if (i > 0) { |
| result += ", "; |
| } |
| result += mTargets[i]; |
| } |
| } |
| result += ")"; |
| } |
| return result; |
| } |
| |
| /** |
| * A transition listener receives notifications from a transition. |
| * Notifications indicate transition lifecycle events: when the transition |
| * begins, ends, or is canceled. |
| */ |
| public static interface TransitionListener { |
| /** |
| * Notification about the start of the transition. |
| * |
| * @param transition The started transition. |
| */ |
| void onTransitionStart(Transition transition); |
| |
| /** |
| * Notification about the end of the transition. Canceled transitions |
| * will always notify listeners of both the cancellation and end |
| * events. That is, {@link #onTransitionEnd()} is always called, |
| * regardless of whether the transition was canceled or played |
| * through to completion. |
| * |
| * @param transition The transition which reached its end. |
| */ |
| void onTransitionEnd(Transition transition); |
| |
| /** |
| * Notification about the cancellation of the transition. |
| * |
| * @param transition The transition which was canceled. |
| */ |
| void onTransitionCancel(Transition transition); |
| } |
| |
| /** |
| * Utility adapter class to avoid having to override all three methods |
| * whenever someone just wants to listen for a single event. |
| * |
| * @hide |
| * */ |
| public static class TransitionListenerAdapter implements TransitionListener { |
| @Override |
| public void onTransitionStart(Transition transition) { |
| } |
| |
| @Override |
| public void onTransitionEnd(Transition transition) { |
| } |
| |
| @Override |
| public void onTransitionCancel(Transition transition) { |
| } |
| } |
| |
| } |