Animate caption showing/hiding (b3589313) · Commits · e / os / android_frameworks_base

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java

+0 −5

Original line number	Diff line number	Diff line
		@@ -445,9 +445,4 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
		private static int getCaptionHeightIdStatic(@WindowingMode int windowingMode) {
		return R.dimen.freeform_decor_caption_height;
		}

		@Override
		int getCaptionViewId() {
		return R.id.caption;
		}
		}

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CarWindowDecoration.java

+0 −5

Original line number	Diff line number	Diff line
		@@ -108,11 +108,6 @@ public class CarWindowDecoration extends WindowDecoration<WindowDecorLinearLayou
		return new Rect();
		}

		@Override
		int getCaptionViewId() {
		return R.id.caption;
		}

		private void updateRelayoutParams(
		RelayoutParams relayoutParams,
		ActivityManager.RunningTaskInfo taskInfo,

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java

+0 −5

Original line number	Diff line number	Diff line
		@@ -1769,11 +1769,6 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
		return loadDimensionPixelSize(mContext.getResources(), getCaptionHeightId(windowingMode));
		}

		@Override
		int getCaptionViewId() {
		return R.id.desktop_mode_caption;
		}

		void setAnimatingTaskResizeOrReposition(boolean animatingTaskResizeOrReposition) {
		if (mRelayoutParams.mLayoutResId == R.layout.desktop_mode_app_handle) return;
		final boolean inFullImmersive =

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java

+0 −16

Original line number	Diff line number	Diff line
		@@ -625,32 +625,16 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
		*/
		private void updateCaptionVisibility(View rootView, @NonNull RelayoutParams params) {
		mIsCaptionVisible = params.mIsCaptionVisible;
		setCaptionVisibility(rootView, mIsCaptionVisible);
		}

		void setTaskDragResizer(TaskDragResizer taskDragResizer) {
		mTaskDragResizer = taskDragResizer;
		}

		// TODO(b/346441962): Move these three methods closer to implementing or View-level classes to
		// keep implementation details more encapsulated.
		private void setCaptionVisibility(View rootView, boolean visible) {
		if (rootView == null) {
		return;
		}
		final int v = visible ? View.VISIBLE : View.GONE;
		final View captionView = rootView.findViewById(getCaptionViewId());
		captionView.setVisibility(v);
		}

		int getCaptionHeightId(@WindowingMode int windowingMode) {
		return Resources.ID_NULL;
		}

		int getCaptionViewId() {
		return Resources.ID_NULL;
		}

		/**
		* Obtains the {@link Display} instance for the display ID in {@link #mTaskInfo} if it exists or
		* registers {@link #mOnDisplaysChangedListener} if it doesn't.

libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/viewholder/AppHandleAnimator.kt

0 → 100644

+101 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2025 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 com.android.wm.shell.windowdecor

		import android.animation.ObjectAnimator
		import android.view.View
		import android.view.View.Visibility
		import android.view.animation.PathInterpolator
		import android.widget.ImageButton
		import androidx.core.animation.doOnEnd
		import com.android.wm.shell.shared.animation.Interpolators

		/**
		* Animates the Desktop View's app handle.
		*/
		class AppHandleAnimator(
		private val appHandleView: View,
		private val captionHandle: ImageButton,
		) {
		companion object {
		// Constants for animating the whole caption
		private const val APP_HANDLE_ALPHA_FADE_IN_ANIMATION_DURATION_MS: Long = 275L
		private const val APP_HANDLE_ALPHA_FADE_OUT_ANIMATION_DURATION_MS: Long = 340
		private val APP_HANDLE_ANIMATION_INTERPOLATOR = PathInterpolator(
		0.4f,
		0f,
		0.2f,
		1f
		)

		// Constants for animating the caption's handle
		private const val HANDLE_ANIMATION_DURATION: Long = 100
		private val HANDLE_ANIMATION_INTERPOLATOR = Interpolators.FAST_OUT_SLOW_IN
		}

		private var animator: ObjectAnimator? = null

		/** Animates the given caption view to the given visibility after a visibility change. */
		fun animateVisibilityChange(@Visibility visible: Int) {
		when (visible) {
		View.VISIBLE -> animateShowAppHandle()
		else -> animateHideAppHandle()
		}
		}

		/** Animate appearance/disappearance of caption's handle. */
		fun animateCaptionHandleAlpha(startValue: Float, endValue: Float) {
		cancel()
		animator = ObjectAnimator.ofFloat(captionHandle, View.ALPHA, startValue, endValue).apply {
		duration = HANDLE_ANIMATION_DURATION
		interpolator = HANDLE_ANIMATION_INTERPOLATOR
		start()
		}
		}

		private fun animateShowAppHandle() {
		cancel()
		appHandleView.alpha = 0f
		appHandleView.visibility = View.VISIBLE
		animator = ObjectAnimator.ofFloat(appHandleView, View.ALPHA, 1f).apply {
		duration = APP_HANDLE_ALPHA_FADE_IN_ANIMATION_DURATION_MS
		interpolator = APP_HANDLE_ANIMATION_INTERPOLATOR
		start()
		}
		}

		private fun animateHideAppHandle() {
		cancel()
		animator = ObjectAnimator.ofFloat(appHandleView, View.ALPHA, 0f).apply {
		duration = APP_HANDLE_ALPHA_FADE_OUT_ANIMATION_DURATION_MS
		interpolator = APP_HANDLE_ANIMATION_INTERPOLATOR
		doOnEnd {
		appHandleView.visibility = View.GONE
		}
		start()
		}
		}

		/**
		* Cancels any active animations.
		*/
		fun cancel() {
		animator?.removeAllListeners()
		animator?.cancel()
		animator = null
		}
		}