Fix CrossFade transition (4f0c4672) · Commits · e / os / android_frameworks_base

api/current.txt

+8 −0

Original line number	Diff line number	Diff line
		@@ -28197,7 +28197,15 @@ package android.view.transition {
		public class Crossfade extends android.view.transition.Transition {
		ctor public Crossfade();
		method protected void captureValues(android.view.transition.TransitionValues, boolean);
		method public int getFadeBehavior();
		method public int getResizeBehavior();
		method protected android.animation.Animator play(android.view.ViewGroup, android.view.transition.TransitionValues, android.view.transition.TransitionValues);
		method public void setFadeBehavior(int);
		method public void setResizeBehavior(int);
		field public static final int FADE_BEHAVIOR_CROSSFADE = 0; // 0x0
		field public static final int FADE_BEHAVIOR_REVEAL = 1; // 0x1
		field public static final int RESIZE_BEHAVIOR_NONE = 0; // 0x0
		field public static final int RESIZE_BEHAVIOR_SCALE = 1; // 0x1
		}

		public class Fade extends android.view.transition.Visibility {

core/java/android/view/transition/Crossfade.java

+119 −13

Original line number	Diff line number	Diff line
		@@ -26,12 +26,12 @@ import android.graphics.Canvas;
		import android.graphics.Rect;
		import android.graphics.drawable.BitmapDrawable;
		import android.graphics.drawable.Drawable;
		import android.util.ArrayMap;
		import android.util.Log;
		import android.view.SurfaceView;
		import android.view.TextureView;
		import android.view.View;
		import android.view.ViewGroup;
		import android.view.ViewOverlay;

		import java.util.Map;

		@@ -54,13 +54,97 @@ public class Crossfade extends Transition {

		private static RectEvaluator sRectEvaluator = new RectEvaluator();

		private int mFadeBehavior = FADE_BEHAVIOR_REVEAL;
		private int mResizeBehavior = RESIZE_BEHAVIOR_SCALE;

		/**
		* Flag specifying that the fading animation should cross-fade
		* between the old and new representation of all affected target
		* views. This means that the old representation will fade out
		* while the new one fades in. This effect may work well on views
		* without solid backgrounds, such as TextViews.
		*
		* @see #setFadeBehavior(int)
		*/
		public static final int FADE_BEHAVIOR_CROSSFADE = 0;
		/**
		* Flag specifying that the fading animation should reveal the
		* new representation of all affected target views. This means
		* that the old representation will fade out, gradually
		* revealing the new representation, which remains opaque
		* the whole time. This effect may work well on views
		* with solid backgrounds, such as ImageViews.
		*
		* @see #setFadeBehavior(int)
		*/
		public static final int FADE_BEHAVIOR_REVEAL = 1;

		/**
		* Flag specifying that the transition should not animate any
		* changes in size between the old and new target views.
		* This means that no scaling will take place as a result of
		* this transition
		*
		* @see #setResizeBehavior(int)
		*/
		public static final int RESIZE_BEHAVIOR_NONE = 0;
		/**
		* Flag specifying that the transition should animate any
		* changes in size between the old and new target views.
		* This means that the animation will scale the start/end
		* representations of affected views from the starting size
		* to the ending size over the course of the animation.
		* This effect may work well on images, but is not recommended
		* for text.
		*
		* @see #setResizeBehavior(int)
		*/
		public static final int RESIZE_BEHAVIOR_SCALE = 1;

		// TODO: Add fade/resize behaviors to xml resources

		/**
		* Sets the type of fading animation that will be run, one of
		* {@link #FADE_BEHAVIOR_CROSSFADE} and {@link #FADE_BEHAVIOR_REVEAL}.
		*
		* @param fadeBehavior The type of fading animation to use when this
		* transition is run.
		*/
		public void setFadeBehavior(int fadeBehavior) {
		if (fadeBehavior >= FADE_BEHAVIOR_CROSSFADE && fadeBehavior <= FADE_BEHAVIOR_REVEAL) {
		mFadeBehavior = fadeBehavior;
		}
		}

		public int getFadeBehavior() {
		return mFadeBehavior;
		}

		/**
		* Sets the type of resizing behavior that will be used during the
		* transition animation, one of {@link #RESIZE_BEHAVIOR_NONE} and
		* {@link #RESIZE_BEHAVIOR_SCALE}.
		*
		* @param resizeBehavior The type of resizing behavior to use when this
		* transition is run.
		*/
		public void setResizeBehavior(int resizeBehavior) {
		if (resizeBehavior >= RESIZE_BEHAVIOR_NONE && resizeBehavior <= RESIZE_BEHAVIOR_SCALE) {
		mResizeBehavior = resizeBehavior;
		}
		}

		public int getResizeBehavior() {
		return mResizeBehavior;
		}

		@Override
		protected boolean prePlay(ViewGroup sceneRoot, TransitionValues startValues,
		TransitionValues endValues) {
		if (startValues == null \|\| endValues == null) {
		return false;
		}
		final View view = startValues.view;
		final View view = endValues.view;
		Map<String, Object> startVals = startValues.values;
		Map<String, Object> endVals = endValues.values;
		Bitmap startBitmap = (Bitmap) startVals.get(PROPNAME_BITMAP);
		@@ -72,8 +156,12 @@ public class Crossfade extends Transition {
		" for start, end: " + startBitmap + ", " + endBitmap);
		}
		if (startDrawable != null && endDrawable != null && !startBitmap.sameAs(endBitmap)) {
		view.getOverlay().add(endDrawable);
		view.getOverlay().add(startDrawable);
		ViewOverlay overlay = (mFadeBehavior == FADE_BEHAVIOR_REVEAL) ?
		view.getOverlay() : ((ViewGroup) view.getParent()).getOverlay();
		if (mFadeBehavior == FADE_BEHAVIOR_REVEAL) {
		overlay.add(endDrawable);
		}
		overlay.add(startDrawable);
		return true;
		} else {
		return false;
		@@ -107,6 +195,10 @@ public class Crossfade extends Transition {
		view.invalidate(startDrawable.getBounds());
		}
		});
		ObjectAnimator anim1 = null;
		if (mFadeBehavior == FADE_BEHAVIOR_CROSSFADE) {
		anim1 = ObjectAnimator.ofFloat(view, View.ALPHA, 0, 1);
		}
		if (Transition.DBG) {
		Log.d(LOG_TAG, "Crossfade: created anim " + anim + " for start, end values " +
		startValues + ", " + endValues);
		@@ -114,32 +206,46 @@ public class Crossfade extends Transition {
		anim.addListener(new AnimatorListenerAdapter() {
		@Override
		public void onAnimationEnd(Animator animation) {
		view.getOverlay().remove(startDrawable);
		view.getOverlay().remove(endDrawable);
		ViewOverlay overlay = (mFadeBehavior == FADE_BEHAVIOR_REVEAL) ?
		view.getOverlay() : ((ViewGroup) view.getParent()).getOverlay();
		overlay.remove(startDrawable);
		if (mFadeBehavior == FADE_BEHAVIOR_REVEAL) {
		overlay.remove(endDrawable);
		}
		}
		});
		AnimatorSet set = new AnimatorSet();
		set.playTogether(anim);
		if (!startBounds.equals(endBounds)) {
		if (anim1 != null) {
		set.playTogether(anim1);
		}
		if (mResizeBehavior == RESIZE_BEHAVIOR_SCALE && !startBounds.equals(endBounds)) {
		if (Transition.DBG) {
		Log.d(LOG_TAG, "animating from startBounds to endBounds: " +
		startBounds + ", " + endBounds);
		}
		Animator anim2 = ObjectAnimator.ofObject(startDrawable, "bounds",
		sRectEvaluator, startBounds, endBounds);
		set.playTogether(anim2);
		if (mResizeBehavior == RESIZE_BEHAVIOR_SCALE) {
		// TODO: How to handle resizing with a CROSSFADE (vs. REVEAL) effect
		// when we are animating the view directly?
		Animator anim3 = ObjectAnimator.ofObject(endDrawable, "bounds",
		sRectEvaluator, startBounds, endBounds);
		set.playTogether(anim2);
		set.playTogether(anim3);
		}
		}
		return set;
		}

		@Override
		protected void captureValues(TransitionValues values, boolean start) {
		View view = values.view;
		values.values.put(PROPNAME_BOUNDS, new Rect(0, 0,
		view.getWidth(), view.getHeight()));
		Rect bounds = new Rect(0, 0, view.getWidth(), view.getHeight());
		if (mFadeBehavior == FADE_BEHAVIOR_CROSSFADE) {
		bounds.offset(view.getLeft(), view.getTop());
		}
		values.values.put(PROPNAME_BOUNDS, bounds);

		if (Transition.DBG) {
		Log.d(LOG_TAG, "Captured bounds " + values.values.get(PROPNAME_BOUNDS) + ": start = " +
		@@ -157,7 +263,7 @@ public class Crossfade extends Transition {
		// TODO: I don't have resources, can't call the non-deprecated method?
		BitmapDrawable drawable = new BitmapDrawable(bitmap);
		// TODO: lrtb will be wrong if the view has transXY set
		drawable.setBounds(view.getLeft(), view.getTop(), view.getRight(), view.getBottom());
		drawable.setBounds(bounds);
		values.values.put(PROPNAME_DRAWABLE, drawable);
		}

tests/TransitionTests/src/com/android/transitiontests/CrossFadeDemo.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,8 @@ public class CrossFadeDemo extends Activity {
		mScene2 = new Scene(mSceneRoot, R.layout.crossfade_1, this);

		Crossfade crossfade = new Crossfade();
		crossfade.setFadeBehavior(Crossfade.FADE_BEHAVIOR_CROSSFADE);
		crossfade.setResizeBehavior(Crossfade.RESIZE_BEHAVIOR_NONE);
		crossfade.setTargetIds(R.id.textview, R.id.textview1, R.id.textview2);
		mTransitionManager = new TransitionManager();
		TransitionGroup moveCrossFade = new TransitionGroup();