| /* |
| * 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.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.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 android.widget.Spinner; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * 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 TransitionSet} 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 Fade}) may not be compatible |
| * with TextureView because they rely on {@link ViewOverlay} functionality, |
| * which does not currently work with TextureView.</p> |
| * |
| * <p>Transitions can be declared in XML resource files inside the <code>res/transition</code> |
| * directory. Transition resources consist of a tag name for one of the Transition |
| * subclasses along with attributes to define some of the attributes of that transition. |
| * For example, here is a minimal resource file that declares a {@link ChangeBounds} transition:</p> |
| * |
| * {@sample development/samples/ApiDemos/res/transition/changebounds.xml ChangeBounds} |
| * |
| * <p>Note that attributes for the transition are not required, just as they are |
| * optional when declared in code; Transitions created from XML resources will use |
| * the same defaults as their code-created equivalents. Here is a slightly more |
| * elaborate example which declares a {@link TransitionSet} transition with |
| * {@link ChangeBounds} and {@link Fade} child transitions:</p> |
| * |
| * {@sample |
| * development/samples/ApiDemos/res/transition/changebounds_fadeout_sequential.xml TransitionSet} |
| * |
| * <p>In this example, the transitionOrdering attribute is used on the TransitionSet |
| * object to change from the default {@link TransitionSet#ORDERING_TOGETHER} behavior |
| * to be {@link TransitionSet#ORDERING_SEQUENTIAL} instead. Also, the {@link Fade} |
| * transition uses a fadingMode of {@link Fade#OUT} instead of the default |
| * out-in behavior. Finally, note the use of the <code>targets</code> sub-tag, which |
| * takes a set of {@link android.R.styleable#TransitionTarget target} tags, each |
| * of which lists a specific <code>targetId</code> which this transition acts upon. |
| * Use of targets is optional, but can be used to either limit the time spent checking |
| * attributes on unchanging views, or limiting the types of animations run on specific views. |
| * In this case, we know that only the <code>grayscaleContainer</code> will be |
| * disappearing, so we choose to limit the {@link Fade} transition to only that view.</p> |
| * |
| * Further information on XML resource descriptions for transitions can be found for |
| * {@link android.R.styleable#Transition}, {@link android.R.styleable#TransitionSet}, |
| * {@link android.R.styleable#TransitionTarget}, and {@link android.R.styleable#Fade}. |
| * |
| */ |
| public abstract class Transition implements Cloneable { |
| |
| private static final String LOG_TAG = "Transition"; |
| static final boolean DBG = false; |
| |
| private String mName = getClass().getName(); |
| |
| long mStartDelay = -1; |
| long mDuration = -1; |
| TimeInterpolator mInterpolator = null; |
| ArrayList<Integer> mTargetIds = new ArrayList<Integer>(); |
| ArrayList<View> mTargets = new ArrayList<View>(); |
| ArrayList<Integer> mTargetIdExcludes = null; |
| ArrayList<View> mTargetExcludes = null; |
| ArrayList<Class> mTargetTypeExcludes = null; |
| ArrayList<Integer> mTargetIdChildExcludes = null; |
| ArrayList<View> mTargetChildExcludes = null; |
| ArrayList<Class> mTargetTypeChildExcludes = null; |
| private TransitionValuesMaps mStartValues = new TransitionValuesMaps(); |
| private TransitionValuesMaps mEndValues = new TransitionValuesMaps(); |
| TransitionSet mParent = null; |
| |
| // Per-animator information used for later canceling when future transitions overlap |
| private static ThreadLocal<ArrayMap<Animator, AnimationInfo>> sRunningAnimators = |
| new ThreadLocal<ArrayMap<Animator, AnimationInfo>>(); |
| |
| // Scene Root is set at createAnimator() time in the cloned Transition |
| ViewGroup mSceneRoot = null; |
| |
| // 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 start() and end() |
| int mNumInstances = 0; |
| |
| // Whether this transition is currently paused, due to a call to pause() |
| boolean mPaused = false; |
| |
| // Whether this transition has ended. Used to avoid pause/resume on transitions |
| // that have completed |
| private boolean mEnded = false; |
| |
| // The set of listeners to be sent transition lifecycle events. |
| ArrayList<TransitionListener> mListeners = null; |
| |
| // The set of animators collected from calls to createAnimator(), |
| // to be run in runAnimators() |
| ArrayList<Animator> mAnimators = new ArrayList<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 TransitionSet), or all target |
| * objects passed down from its parent (if it is in a TransitionSet). |
| */ |
| 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. |
| * @attr ref android.R.styleable#Transition_duration |
| */ |
| public Transition setDuration(long duration) { |
| mDuration = duration; |
| return this; |
| } |
| |
| /** |
| * Returns the duration set on this transition. If no duration has been set, |
| * the returned value will be negative, indicating that resulting animators will |
| * retain their own durations. |
| * |
| * @return The duration set on this transition, in milliseconds, if one has been |
| * set, otherwise returns a negative number. |
| */ |
| 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. |
| * @return This transition object. |
| * @attr ref android.R.styleable#Transition_startDelay |
| */ |
| public Transition setStartDelay(long startDelay) { |
| mStartDelay = startDelay; |
| return this; |
| } |
| |
| /** |
| * Returns the startDelay set on this transition. If no startDelay has been set, |
| * the returned value will be negative, indicating that resulting animators will |
| * retain their own startDelays. |
| * |
| * @return The startDelay set on this transition, in milliseconds, if one has |
| * been set, otherwise returns a negative number. |
| */ |
| 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 |
| * @return This transition object. |
| * @attr ref android.R.styleable#Transition_interpolator |
| */ |
| public Transition setInterpolator(TimeInterpolator interpolator) { |
| mInterpolator = interpolator; |
| return this; |
| } |
| |
| /** |
| * Returns the interpolator set on this transition. If no interpolator has been set, |
| * the returned value will be null, indicating that resulting animators will |
| * retain their own interpolators. |
| * |
| * @return The interpolator set on this transition, if one has been set, otherwise |
| * returns null. |
| */ |
| public TimeInterpolator getInterpolator() { |
| return mInterpolator; |
| } |
| |
| /** |
| * Returns the set of property names used stored in the {@link TransitionValues} |
| * object passed into {@link #captureStartValues(TransitionValues)} that |
| * this transition cares about for the purposes of canceling overlapping animations. |
| * When any transition is started on a given scene root, all transitions |
| * currently running on that same scene root are checked to see whether the |
| * properties on which they based their animations agree with the end values of |
| * the same properties in the new transition. If the end values are not equal, |
| * then the old animation is canceled since the new transition will start a new |
| * animation to these new values. If the values are equal, the old animation is |
| * allowed to continue and no new animation is started for that transition. |
| * |
| * <p>A transition does not need to override this method. However, not doing so |
| * will mean that the cancellation logic outlined in the previous paragraph |
| * will be skipped for that transition, possibly leading to artifacts as |
| * old transitions and new transitions on the same targets run in parallel, |
| * animating views toward potentially different end values.</p> |
| * |
| * @return An array of property names as described in the class documentation for |
| * {@link TransitionValues}. The default implementation returns <code>null</code>. |
| */ |
| public String[] getTransitionProperties() { |
| return null; |
| } |
| |
| /** |
| * This method creates an animation that will be run for this transition |
| * given the information in the startValues and endValues structures captured |
| * earlier for the start and end scenes. Subclasses of Transition should override |
| * this method. The method should only be called by the transition system; it is |
| * not intended to be called from external classes. |
| * |
| * <p>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 TransitionSet} 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> |
| * |
| * <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.</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 The root of the transition hierarchy. |
| * @param startValues The values for a specific target in the start scene. |
| * @param endValues The values for the target in the end scene. |
| * @return A Animator to be started at the appropriate time in the |
| * overall transition for this scene change. A null value means no animation |
| * should be run. |
| */ |
| public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues, |
| TransitionValues endValues) { |
| return null; |
| } |
| |
| /** |
| * This method, essentially a wrapper around all calls to createAnimator for all |
| * possible target views, is called with the entire set of start/end |
| * values. The implementation in Transition iterates through these lists |
| * and calls {@link #createAnimator(ViewGroup, TransitionValues, TransitionValues)} |
| * with each set of start/end values on this transition. The |
| * TransitionSet subclass overrides this method and delegates it to |
| * each of its children in succession. |
| * |
| * @hide |
| */ |
| protected void createAnimators(ViewGroup sceneRoot, TransitionValuesMaps startValues, |
| TransitionValuesMaps endValues) { |
| if (DBG) { |
| Log.d(LOG_TAG, "createAnimators() for " + this); |
| } |
| 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 if (id != View.NO_ID) { |
| 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); |
| } |
| ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators(); |
| 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) { |
| 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 = createAnimator(sceneRoot, start, end); |
| if (animator != null) { |
| // Save animation info for future cancellation purposes |
| View view = null; |
| TransitionValues infoValues = null; |
| if (end != null) { |
| view = end.view; |
| String[] properties = getTransitionProperties(); |
| if (view != null && properties != null && properties.length > 0) { |
| infoValues = new TransitionValues(); |
| infoValues.view = view; |
| TransitionValues newValues = endValues.viewValues.get(view); |
| if (newValues != null) { |
| for (int j = 0; j < properties.length; ++j) { |
| infoValues.values.put(properties[j], |
| newValues.values.get(properties[j])); |
| } |
| } |
| int numExistingAnims = runningAnimators.size(); |
| for (int j = 0; j < numExistingAnims; ++j) { |
| Animator anim = runningAnimators.keyAt(j); |
| AnimationInfo info = runningAnimators.get(anim); |
| if (info.values != null && info.view == view && |
| ((info.name == null && getName() == null) || |
| info.name.equals(getName()))) { |
| if (info.values.equals(infoValues)) { |
| // Favor the old animator |
| animator = null; |
| break; |
| } |
| } |
| } |
| } |
| } else { |
| view = (start != null) ? start.view : null; |
| } |
| if (animator != null) { |
| AnimationInfo info = new AnimationInfo(view, getName(), infoValues); |
| runningAnimators.put(animator, info); |
| mAnimators.add(animator); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * 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 (mTargetIdExcludes != null && mTargetIdExcludes.contains(targetId)) { |
| return false; |
| } |
| if (mTargetExcludes != null && mTargetExcludes.contains(target)) { |
| return false; |
| } |
| if (mTargetTypeExcludes != null && target != null) { |
| int numTypes = mTargetTypeExcludes.size(); |
| for (int i = 0; i < numTypes; ++i) { |
| Class type = mTargetTypeExcludes.get(i); |
| if (type.isInstance(target)) { |
| return false; |
| } |
| } |
| } |
| if (mTargetIds.size() == 0 && mTargets.size() == 0) { |
| return true; |
| } |
| if (mTargetIds.size() > 0) { |
| for (int i = 0; i < mTargetIds.size(); ++i) { |
| if (mTargetIds.get(i) == targetId) { |
| return true; |
| } |
| } |
| } |
| if (target != null && mTargets.size() > 0) { |
| for (int i = 0; i < mTargets.size(); ++i) { |
| if (mTargets.get(i) == target) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| private static ArrayMap<Animator, AnimationInfo> getRunningAnimators() { |
| ArrayMap<Animator, AnimationInfo> runningAnimators = sRunningAnimators.get(); |
| if (runningAnimators == null) { |
| runningAnimators = new ArrayMap<Animator, AnimationInfo>(); |
| sRunningAnimators.set(runningAnimators); |
| } |
| return runningAnimators; |
| } |
| |
| /** |
| * This is called internally once all animations have been set up by the |
| * transition hierarchy. \ |
| * |
| * @hide |
| */ |
| protected void runAnimators() { |
| if (DBG) { |
| Log.d(LOG_TAG, "runAnimators() on " + this); |
| } |
| start(); |
| ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators(); |
| // Now start every Animator that was previously created for this transition |
| for (Animator anim : mAnimators) { |
| if (DBG) { |
| Log.d(LOG_TAG, " anim: " + anim); |
| } |
| if (runningAnimators.containsKey(anim)) { |
| start(); |
| runAnimator(anim, runningAnimators); |
| } |
| } |
| mAnimators.clear(); |
| end(); |
| } |
| |
| private void runAnimator(Animator animator, |
| final ArrayMap<Animator, AnimationInfo> runningAnimators) { |
| 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) { |
| runningAnimators.remove(animation); |
| mCurrentAnimators.remove(animation); |
| } |
| }); |
| animate(animator); |
| } |
| } |
| |
| /** |
| * Captures the values in the start scene for the properties that this |
| * transition monitors. These values are then passed as the startValues |
| * structure in a later call to |
| * {@link #createAnimator(ViewGroup, TransitionValues, TransitionValues)}. |
| * 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 #createAnimator(android.view.ViewGroup, TransitionValues, TransitionValues)} |
| * method to determine what, if any, animations, should be run. |
| * |
| * <p>Subclasses must implement this method. The method should only be called by the |
| * transition system; it is not intended to be called from external classes.</p> |
| * |
| * @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. |
| * |
| * @see #captureEndValues(TransitionValues) |
| * @see #createAnimator(ViewGroup, TransitionValues, TransitionValues) |
| */ |
| public abstract void captureStartValues(TransitionValues transitionValues); |
| |
| /** |
| * Captures the values in the end scene for the properties that this |
| * transition monitors. These values are then passed as the endValues |
| * structure in a later call to |
| * {@link #createAnimator(ViewGroup, TransitionValues, TransitionValues)}. |
| * 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 #createAnimator(android.view.ViewGroup, TransitionValues, TransitionValues)} |
| * method to determine what, if any, animations, should be run. |
| * |
| * <p>Subclasses must implement this method. The method should only be called by the |
| * transition system; it is not intended to be called from external classes.</p> |
| * |
| * @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. |
| * |
| * @see #captureStartValues(TransitionValues) |
| * @see #createAnimator(ViewGroup, TransitionValues, TransitionValues) |
| */ |
| public abstract void captureEndValues(TransitionValues transitionValues); |
| |
| /** |
| * Adds the id of a target view 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. |
| * |
| * <p>Note that using ids to specify targets implies that ids should be unique |
| * within the view hierarchy underneat the scene root.</p> |
| * |
| * @see View#getId() |
| * @param targetId The id of a target view, must be a positive number. |
| * @return The Transition to which the targetId is added. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionSet.addTransitions(new Fade()).addTarget(someId);</code> |
| */ |
| public Transition addTarget(int targetId) { |
| if (targetId > 0) { |
| mTargetIds.add(targetId); |
| } |
| return this; |
| } |
| |
| /** |
| * Removes the given targetId from the list of ids that this Transition |
| * is interested in animating. |
| * |
| * @param targetId The id of a target view, must be a positive number. |
| * @return The Transition from which the targetId is removed. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionSet.addTransitions(new Fade()).removeTargetId(someId);</code> |
| */ |
| public Transition removeTarget(int targetId) { |
| if (targetId > 0) { |
| mTargetIds.remove(targetId); |
| } |
| return this; |
| } |
| |
| /** |
| * Whether to add the given id to the list of target ids to exclude from this |
| * transition. The <code>exclude</code> parameter specifies whether the target |
| * should be added to or removed from the excluded list. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeChildren(int, boolean) |
| * @see #excludeTarget(View, boolean) |
| * @see #excludeTarget(Class, boolean) |
| * |
| * @param targetId The id of a target to ignore when running this transition. |
| * @param exclude Whether to add the target to or remove the target from the |
| * current list of excluded targets. |
| * @return This transition object. |
| */ |
| public Transition excludeTarget(int targetId, boolean exclude) { |
| mTargetIdExcludes = excludeId(mTargetIdExcludes, targetId, exclude); |
| return this; |
| } |
| |
| /** |
| * Whether to add the children of the given id to the list of targets to exclude |
| * from this transition. The <code>exclude</code> parameter specifies whether |
| * the children of the target should be added to or removed from the excluded list. |
| * Excluding children in this way provides a simple mechanism for excluding all |
| * children of specific targets, rather than individually excluding each |
| * child individually. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeTarget(int, boolean) |
| * @see #excludeChildren(View, boolean) |
| * @see #excludeChildren(Class, boolean) |
| * |
| * @param targetId The id of a target whose children should be ignored when running |
| * this transition. |
| * @param exclude Whether to add the target to or remove the target from the |
| * current list of excluded-child targets. |
| * @return This transition object. |
| */ |
| public Transition excludeChildren(int targetId, boolean exclude) { |
| mTargetIdChildExcludes = excludeId(mTargetIdChildExcludes, targetId, exclude); |
| return this; |
| } |
| |
| /** |
| * Utility method to manage the boilerplate code that is the same whether we |
| * are excluding targets or their children. |
| */ |
| private ArrayList<Integer> excludeId(ArrayList<Integer> list, int targetId, boolean exclude) { |
| if (targetId > 0) { |
| if (exclude) { |
| list = ArrayListManager.add(list, targetId); |
| } else { |
| list = ArrayListManager.remove(list, targetId); |
| } |
| } |
| return list; |
| } |
| |
| /** |
| * Whether to add the given target to the list of targets to exclude from this |
| * transition. The <code>exclude</code> parameter specifies whether the target |
| * should be added to or removed from the excluded list. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeChildren(View, boolean) |
| * @see #excludeTarget(int, boolean) |
| * @see #excludeTarget(Class, boolean) |
| * |
| * @param target The target to ignore when running this transition. |
| * @param exclude Whether to add the target to or remove the target from the |
| * current list of excluded targets. |
| * @return This transition object. |
| */ |
| public Transition excludeTarget(View target, boolean exclude) { |
| mTargetExcludes = excludeView(mTargetExcludes, target, exclude); |
| return this; |
| } |
| |
| /** |
| * Whether to add the children of given target to the list of target children |
| * to exclude from this transition. The <code>exclude</code> parameter specifies |
| * whether the target should be added to or removed from the excluded list. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeTarget(View, boolean) |
| * @see #excludeChildren(int, boolean) |
| * @see #excludeChildren(Class, boolean) |
| * |
| * @param target The target to ignore when running this transition. |
| * @param exclude Whether to add the target to or remove the target from the |
| * current list of excluded targets. |
| * @return This transition object. |
| */ |
| public Transition excludeChildren(View target, boolean exclude) { |
| mTargetChildExcludes = excludeView(mTargetChildExcludes, target, exclude); |
| return this; |
| } |
| |
| /** |
| * Utility method to manage the boilerplate code that is the same whether we |
| * are excluding targets or their children. |
| */ |
| private ArrayList<View> excludeView(ArrayList<View> list, View target, boolean exclude) { |
| if (target != null) { |
| if (exclude) { |
| list = ArrayListManager.add(list, target); |
| } else { |
| list = ArrayListManager.remove(list, target); |
| } |
| } |
| return list; |
| } |
| |
| /** |
| * Whether to add the given type to the list of types to exclude from this |
| * transition. The <code>exclude</code> parameter specifies whether the target |
| * type should be added to or removed from the excluded list. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeChildren(Class, boolean) |
| * @see #excludeTarget(int, boolean) |
| * @see #excludeTarget(View, boolean) |
| * |
| * @param type The type to ignore when running this transition. |
| * @param exclude Whether to add the target type to or remove it from the |
| * current list of excluded target types. |
| * @return This transition object. |
| */ |
| public Transition excludeTarget(Class type, boolean exclude) { |
| mTargetTypeExcludes = excludeType(mTargetTypeExcludes, type, exclude); |
| return this; |
| } |
| |
| /** |
| * Whether to add the given type to the list of types whose children should |
| * be excluded from this transition. The <code>exclude</code> parameter |
| * specifies whether the target type should be added to or removed from |
| * the excluded list. |
| * |
| * <p>Excluding targets is a general mechanism for allowing transitions to run on |
| * a view hierarchy while skipping target views that should not be part of |
| * the transition. For example, you may want to avoid animating children |
| * of a specific ListView or Spinner. Views can be excluded either by their |
| * id, or by their instance reference, or by the Class of that view |
| * (eg, {@link Spinner}).</p> |
| * |
| * @see #excludeTarget(Class, boolean) |
| * @see #excludeChildren(int, boolean) |
| * @see #excludeChildren(View, boolean) |
| * |
| * @param type The type to ignore when running this transition. |
| * @param exclude Whether to add the target type to or remove it from the |
| * current list of excluded target types. |
| * @return This transition object. |
| */ |
| public Transition excludeChildren(Class type, boolean exclude) { |
| mTargetTypeChildExcludes = excludeType(mTargetTypeChildExcludes, type, exclude); |
| return this; |
| } |
| |
| /** |
| * Utility method to manage the boilerplate code that is the same whether we |
| * are excluding targets or their children. |
| */ |
| private ArrayList<Class> excludeType(ArrayList<Class> list, Class type, boolean exclude) { |
| if (type != null) { |
| if (exclude) { |
| list = ArrayListManager.add(list, type); |
| } else { |
| list = ArrayListManager.remove(list, type); |
| } |
| } |
| return list; |
| } |
| |
| /** |
| * 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 #addTarget(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 {@link #addTarget(int)} should be used |
| * instead of {@link #addTarget(View)}. If, on the other hand, scene changes involve |
| * changes all within the same view hierarchy, among views which do not |
| * necessarily have ids set on them, then the target list of views may be more |
| * convenient.</p> |
| * |
| * @see #addTarget(int) |
| * @param target A View on which the Transition will act, must be non-null. |
| * @return The Transition to which the target is added. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionSet.addTransitions(new Fade()).addTarget(someView);</code> |
| */ |
| public Transition addTarget(View target) { |
| mTargets.add(target); |
| return this; |
| } |
| |
| /** |
| * Removes the given target from the list of targets that this Transition |
| * is interested in animating. |
| * |
| * @param target The target view, must be non-null. |
| * @return Transition The Transition from which the target is removed. |
| * Returning the same object makes it easier to chain calls during |
| * construction, such as |
| * <code>transitionSet.addTransitions(new Fade()).removeTarget(someView);</code> |
| */ |
| public Transition removeTarget(View target) { |
| if (target != null) { |
| mTargets.remove(target); |
| } |
| 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 List<Integer> 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 List<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.size() > 0 || mTargets.size() > 0) { |
| if (mTargetIds.size() > 0) { |
| for (int i = 0; i < mTargetIds.size(); ++i) { |
| int id = mTargetIds.get(i); |
| View view = sceneRoot.findViewById(id); |
| if (view != null) { |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| if (start) { |
| captureStartValues(values); |
| } else { |
| captureEndValues(values); |
| } |
| 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.size() > 0) { |
| for (int i = 0; i < mTargets.size(); ++i) { |
| View view = mTargets.get(i); |
| if (view != null) { |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| if (start) { |
| captureStartValues(values); |
| } else { |
| captureEndValues(values); |
| } |
| 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; |
| } |
| int id = View.NO_ID; |
| long itemId = View.NO_ID; |
| if (!isListViewItem) { |
| id = view.getId(); |
| } else { |
| ListView listview = (ListView) view.getParent(); |
| int position = listview.getPositionForView(view); |
| itemId = listview.getItemIdAtPosition(position); |
| view.setHasTransientState(true); |
| } |
| if (mTargetIdExcludes != null && mTargetIdExcludes.contains(id)) { |
| return; |
| } |
| if (mTargetExcludes != null && mTargetExcludes.contains(view)) { |
| return; |
| } |
| if (mTargetTypeExcludes != null && view != null) { |
| int numTypes = mTargetTypeExcludes.size(); |
| for (int i = 0; i < numTypes; ++i) { |
| if (mTargetTypeExcludes.get(i).isInstance(view)) { |
| return; |
| } |
| } |
| } |
| TransitionValues values = new TransitionValues(); |
| values.view = view; |
| if (start) { |
| captureStartValues(values); |
| } else { |
| captureEndValues(values); |
| } |
| if (start) { |
| if (!isListViewItem) { |
| mStartValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mStartValues.idValues.put((int) id, values); |
| } |
| } else { |
| mStartValues.itemIdValues.put(itemId, values); |
| } |
| } else { |
| if (!isListViewItem) { |
| mEndValues.viewValues.put(view, values); |
| if (id >= 0) { |
| mEndValues.idValues.put((int) id, values); |
| } |
| } else { |
| mEndValues.itemIdValues.put(itemId, values); |
| } |
| } |
| if (view instanceof ViewGroup) { |
| // Don't traverse child hierarchy if there are any child-excludes on this view |
| if (mTargetIdChildExcludes != null && mTargetIdChildExcludes.contains(id)) { |
| return; |
| } |
| if (mTargetChildExcludes != null && mTargetChildExcludes.contains(view)) { |
| return; |
| } |
| if (mTargetTypeChildExcludes != null && view != null) { |
| int numTypes = mTargetTypeChildExcludes.size(); |
| for (int i = 0; i < numTypes; ++i) { |
| if (mTargetTypeChildExcludes.get(i).isInstance(view)) { |
| return; |
| } |
| } |
| } |
| 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. |
| */ |
| public 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; |
| } |
| |
| /** |
| * Pauses this transition, sending out calls to {@link |
| * TransitionListener#onTransitionPause(Transition)} to all listeners |
| * and pausing all running animators started by this transition. |
| * |
| * @hide |
| */ |
| public void pause() { |
| if (!mEnded) { |
| ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators(); |
| int numOldAnims = runningAnimators.size(); |
| for (int i = numOldAnims - 1; i >= 0; i--) { |
| Animator anim = runningAnimators.keyAt(i); |
| anim.pause(); |
| } |
| 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).onTransitionPause(this); |
| } |
| } |
| mPaused = true; |
| } |
| } |
| |
| /** |
| * Resumes this transition, sending out calls to {@link |
| * TransitionListener#onTransitionPause(Transition)} to all listeners |
| * and pausing all running animators started by this transition. |
| * |
| * @hide |
| */ |
| public void resume() { |
| if (mPaused) { |
| if (!mEnded) { |
| ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators(); |
| int numOldAnims = runningAnimators.size(); |
| for (int i = numOldAnims - 1; i >= 0; i--) { |
| Animator anim = runningAnimators.keyAt(i); |
| anim.resume(); |
| } |
| 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).onTransitionResume(this); |
| } |
| } |
| } |
| mPaused = false; |
| } |
| } |
| |
| /** |
| * Called by TransitionManager to play the transition. This calls |
| * createAnimators() to set things up and create all of the animations and then |
| * runAnimations() to actually start the animations. |
| */ |
| void playTransition(ViewGroup sceneRoot) { |
| ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators(); |
| int numOldAnims = runningAnimators.size(); |
| for (int i = numOldAnims - 1; i >= 0; i--) { |
| Animator anim = runningAnimators.keyAt(i); |
| if (anim != null) { |
| AnimationInfo oldInfo = runningAnimators.get(anim); |
| if (oldInfo != null) { |
| boolean cancel = false; |
| TransitionValues oldValues = oldInfo.values; |
| View oldView = oldInfo.view; |
| TransitionValues newValues = mEndValues.viewValues != null ? |
| mEndValues.viewValues.get(oldView) : null; |
| if (newValues == null) { |
| newValues = mEndValues.idValues.get(oldView.getId()); |
| } |
| if (oldValues != null) { |
| // if oldValues null, then transition didn't care to stash values, |
| // and won't get canceled |
| if (newValues != null) { |
| for (String key : oldValues.values.keySet()) { |
| Object oldValue = oldValues.values.get(key); |
| Object newValue = newValues.values.get(key); |
| if (oldValue != null && newValue != null && |
| !oldValue.equals(newValue)) { |
| cancel = true; |
| if (DBG) { |
| Log.d(LOG_TAG, "Transition.playTransition: " + |
| "oldValue != newValue for " + key + |
| ": old, new = " + oldValue + ", " + newValue); |
| } |
| break; |
| } |
| } |
| } |
| } |
| if (cancel) { |
| if (anim.isRunning() || anim.isStarted()) { |
| if (DBG) { |
| Log.d(LOG_TAG, "Canceling anim " + anim); |
| } |
| anim.cancel(); |
| } else { |
| if (DBG) { |
| Log.d(LOG_TAG, "removing anim from info list: " + anim); |
| } |
| runningAnimators.remove(anim); |
| } |
| } |
| } |
| } |
| } |
| |
| createAnimators(sceneRoot, mStartValues, mEndValues); |
| runAnimators(); |
| } |
| |
| /** |
| * 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 #end()}. |
| * |
| * @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) { |
| end(); |
| } 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) { |
| end(); |
| animation.removeListener(this); |
| } |
| }); |
| animator.start(); |
| } |
| } |
| |
| /** |
| * This method is called automatically by the transition and |
| * TransitionSet classes prior to a Transition subclass starting; |
| * subclasses should not need to call it directly. |
| * |
| * @hide |
| */ |
| protected void start() { |
| if (mNumInstances == 0) { |
| 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); |
| } |
| } |
| mEnded = false; |
| } |
| mNumInstances++; |
| } |
| |
| /** |
| * This method is called automatically by the Transition and |
| * TransitionSet classes when a transition finishes, either because |
| * a transition did nothing (returned a null Animator from |
| * {@link Transition#createAnimator(ViewGroup, TransitionValues, |
| * TransitionValues)}) or because the transition returned a valid |
| * Animator and end() was called in the onAnimationEnd() |
| * callback of the AnimatorListener. |
| * |
| * @hide |
| */ |
| protected void end() { |
| --mNumInstances; |
| if (mNumInstances == 0) { |
| 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); |
| } |
| } |
| mEnded = true; |
| } |
| } |
| |
| /** |
| * This method cancels a transition that is currently running. |
| * |
| * @hide |
| */ |
| protected void cancel() { |
| int numAnimators = mCurrentAnimators.size(); |
| for (int i = numAnimators - 1; i >= 0; i--) { |
| Animator animator = mCurrentAnimators.get(i); |
| animator.cancel(); |
| } |
| 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. |
| * @return This transition object. |
| */ |
| public Transition addListener(TransitionListener listener) { |
| if (mListeners == null) { |
| mListeners = new ArrayList<TransitionListener>(); |
| } |
| mListeners.add(listener); |
| return this; |
| } |
| |
| /** |
| * 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. |
| * @return This transition object. |
| */ |
| public Transition removeListener(TransitionListener listener) { |
| if (mListeners == null) { |
| return this; |
| } |
| mListeners.remove(listener); |
| if (mListeners.size() == 0) { |
| mListeners = null; |
| } |
| return this; |
| } |
| |
| Transition setSceneRoot(ViewGroup sceneRoot) { |
| mSceneRoot = sceneRoot; |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return toString(""); |
| } |
| |
| @Override |
| public Transition clone() { |
| Transition clone = null; |
| try { |
| clone = (Transition) super.clone(); |
| clone.mAnimators = new ArrayList<Animator>(); |
| clone.mStartValues = new TransitionValuesMaps(); |
| clone.mEndValues = new TransitionValuesMaps(); |
| } catch (CloneNotSupportedException e) {} |
| |
| return clone; |
| } |
| |
| /** |
| * Returns the name of this Transition. This name is used internally to distinguish |
| * between different transitions to determine when interrupting transitions overlap. |
| * For example, a ChangeBounds running on the same target view as another ChangeBounds |
| * should determine whether the old transition is animating to different end values |
| * and should be canceled in favor of the new transition. |
| * |
| * <p>By default, a Transition's name is simply the value of {@link Class#getName()}, |
| * but subclasses are free to override and return something different.</p> |
| * |
| * @return The name of this transition. |
| */ |
| public String getName() { |
| return mName; |
| } |
| |
| 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.size() > 0 || mTargets.size() > 0) { |
| result += "tgts("; |
| if (mTargetIds.size() > 0) { |
| for (int i = 0; i < mTargetIds.size(); ++i) { |
| if (i > 0) { |
| result += ", "; |
| } |
| result += mTargetIds.get(i); |
| } |
| } |
| if (mTargets.size() > 0) { |
| for (int i = 0; i < mTargets.size(); ++i) { |
| if (i > 0) { |
| result += ", "; |
| } |
| result += mTargets.get(i); |
| } |
| } |
| result += ")"; |
| } |
| return result; |
| } |
| |
| /** |
| * A transition listener receives notifications from a transition. |
| * Notifications indicate transition lifecycle events. |
| */ |
| 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(Transition)} 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. |
| * Note that cancel may be called by a parent {@link TransitionSet} on |
| * a child transition which has not yet started. This allows the child |
| * transition to restore state on target objects which was set at |
| * {@link #createAnimator(android.view.ViewGroup, TransitionValues, TransitionValues) |
| * createAnimator()} time. |
| * |
| * @param transition The transition which was canceled. |
| */ |
| void onTransitionCancel(Transition transition); |
| |
| /** |
| * Notification when a transition is paused. |
| * Note that createAnimator() may be called by a parent {@link TransitionSet} on |
| * a child transition which has not yet started. This allows the child |
| * transition to restore state on target objects which was set at |
| * {@link #createAnimator(android.view.ViewGroup, TransitionValues, TransitionValues) |
| * createAnimator()} time. |
| * |
| * @param transition The transition which was paused. |
| */ |
| void onTransitionPause(Transition transition); |
| |
| /** |
| * Notification when a transition is resumed. |
| * Note that resume() may be called by a parent {@link TransitionSet} on |
| * a child transition which has not yet started. This allows the child |
| * transition to restore state which may have changed in an earlier call |
| * to {@link #onTransitionPause(Transition)}. |
| * |
| * @param transition The transition which was resumed. |
| */ |
| void onTransitionResume(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) { |
| } |
| |
| @Override |
| public void onTransitionPause(Transition transition) { |
| } |
| |
| @Override |
| public void onTransitionResume(Transition transition) { |
| } |
| } |
| |
| /** |
| * Holds information about each animator used when a new transition starts |
| * while other transitions are still running to determine whether a running |
| * animation should be canceled or a new animation noop'd. The structure holds |
| * information about the state that an animation is going to, to be compared to |
| * end state of a new animation. |
| */ |
| private static class AnimationInfo { |
| View view; |
| String name; |
| TransitionValues values; |
| |
| AnimationInfo(View view, String name, TransitionValues values) { |
| this.view = view; |
| this.name = name; |
| this.values = values; |
| } |
| } |
| |
| /** |
| * Utility class for managing typed ArrayLists efficiently. In particular, this |
| * can be useful for lists that we don't expect to be used often (eg, the exclude |
| * lists), so we'd like to keep them nulled out by default. This causes the code to |
| * become tedious, with constant null checks, code to allocate when necessary, |
| * and code to null out the reference when the list is empty. This class encapsulates |
| * all of that functionality into simple add()/remove() methods which perform the |
| * necessary checks, allocation/null-out as appropriate, and return the |
| * resulting list. |
| */ |
| private static class ArrayListManager { |
| |
| /** |
| * Add the specified item to the list, returning the resulting list. |
| * The returned list can either the be same list passed in or, if that |
| * list was null, the new list that was created. |
| * |
| * Note that the list holds unique items; if the item already exists in the |
| * list, the list is not modified. |
| */ |
| static <T> ArrayList<T> add(ArrayList<T> list, T item) { |
| if (list == null) { |
| list = new ArrayList<T>(); |
| } |
| if (!list.contains(item)) { |
| list.add(item); |
| } |
| return list; |
| } |
| |
| /** |
| * Remove the specified item from the list, returning the resulting list. |
| * The returned list can either the be same list passed in or, if that |
| * list becomes empty as a result of the remove(), the new list was created. |
| */ |
| static <T> ArrayList<T> remove(ArrayList<T> list, T item) { |
| if (list != null) { |
| list.remove(item); |
| if (list.isEmpty()) { |
| list = null; |
| } |
| } |
| return list; |
| } |
| } |
| |
| } |
