Add new API to Animator to allow seeking of animations (5d7b50b8) · Commits · e / os / android_frameworks_base

api/current.xml

+24 −0

Original line number	Diff line number	Diff line
		@@ -19914,6 +19914,17 @@
		visibility="public"
		>
		</method>
		<method name="getCurrentPlayTime"
		return="long"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		</method>
		<method name="getFrameDelay"
		return="long"
		abstract="false"
		@@ -19993,6 +20004,19 @@
		<parameter name="listener" type="android.animation.Animator.AnimatorUpdateListener">
		</parameter>
		</method>
		<method name="setCurrentPlayTime"
		return="void"
		abstract="false"
		native="false"
		synchronized="false"
		static="false"
		final="false"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="playTime" type="long">
		</parameter>
		</method>
		<method name="setEvaluator"
		return="void"
		abstract="false"

core/java/android/animation/Animator.java

+60 −1

Original line number	Diff line number	Diff line
		@@ -65,6 +65,7 @@ public class Animator extends Animatable {
		private static final int RUNNING = 1; // Playing normally
		private static final int CANCELED = 2; // cancel() called - need to end it
		private static final int ENDED = 3; // end() called - need to end it
		private static final int SEEKED = 4; // Seeked to some time value

		/**
		* Enum values used in XML attributes to indicate the value for mValueType
		@@ -85,6 +86,12 @@ public class Animator extends Animatable {
		// to animateFrame()
		private long mStartTime;

		/**
		* Set when setCurrentPlayTime() is called. If negative, animation is not currently seeked
		* to a value.
		*/
		private long mSeekTime = -1;

		// The static sAnimationHandler processes the internal timing loop on which all animations
		// are based
		private static AnimationHandler sAnimationHandler;
		@@ -144,6 +151,12 @@ public class Animator extends Animatable {
		private static final ArrayList<Animator> sDelayedAnims = new ArrayList<Animator>();
		private static final ArrayList<Animator> sReadyAnims = new ArrayList<Animator>();

		/**
		* Flag that denotes whether the animation is set up and ready to go. Used by seek() to
		* set up animation that has not yet been started.
		*/
		private boolean mInitialized = false;

		//
		// Backing variables
		//
		@@ -411,6 +424,44 @@ public class Animator extends Animatable {
		}
		mPlayingBackwards = false;
		mCurrentIteration = 0;
		mInitialized = true;
		}

		/**
		* Sets the position of the animation to the specified point in time. This time should
		* be between 0 and the total duration of the animation, including any repetition. If
		* the animation has not yet been started, then it will not advance forward after it is
		* set to this time; it will simply set the time to this value and perform any appropriate
		* actions based on that time. If the animation is already running, then seek() will
		* set the current playing time to this value and continue playing from that point.
		*
		* @param playTime The time, in milliseconds, to which the animation is advanced or rewound.
		*/
		public void setCurrentPlayTime(long playTime) {
		if (!mInitialized) {
		initAnimation();
		}
		long currentTime = AnimationUtils.currentAnimationTimeMillis();
		if (mPlayingState != RUNNING) {
		mSeekTime = playTime;
		mPlayingState = SEEKED;
		}
		mStartTime = currentTime - playTime;
		animationFrame(currentTime);
		}

		/**
		* Gets the current position of the animation in time, which is equal to the current
		* time minus the time that the animation started. An animation that is not yet started will
		* return a value of zero.
		*
		* @return The current position in time of the animation.
		*/
		public long getCurrentPlayTime() {
		if (!mInitialized) {
		return 0;
		}
		return AnimationUtils.currentAnimationTimeMillis() - mStartTime;
		}

		/**
		@@ -740,6 +791,7 @@ public class Animator extends Animatable {
		}

		public void start() {
		mPlayingState = STOPPED;
		sPendingAnimations.add(this);
		if (sAnimationHandler == null) {
		sAnimationHandler = new AnimationHandler();
		@@ -845,10 +897,17 @@ public class Animator extends Animatable {

		if (mPlayingState == STOPPED) {
		mPlayingState = RUNNING;
		if (mSeekTime < 0) {
		mStartTime = currentTime;
		} else {
		mStartTime = currentTime - mSeekTime;
		// Now that we're playing, reset the seek time
		mSeekTime = -1;
		}
		}
		switch (mPlayingState) {
		case RUNNING:
		case SEEKED:
		float fraction = (float)(currentTime - mStartTime) / mDuration;
		if (fraction >= 1f) {
		if (mCurrentIteration < mRepeatCount \|\| mRepeatCount == INFINITE) {