API updates to ScrollFeedbackProvider (f134b194) · Commits · e / os / android_frameworks_base

core/api/current.txt

+0 −3

Original line number	Diff line number	Diff line
		@@ -51231,11 +51231,8 @@ package android.view {

		@FlaggedApi(Flags.FLAG_SCROLL_FEEDBACK_API) public interface ScrollFeedbackProvider {
		method public void onScrollLimit(int, int, int, boolean);
		method public default void onScrollLimit(@NonNull android.view.MotionEvent, int, boolean);
		method public void onScrollProgress(int, int, int, int);
		method public default void onScrollProgress(@NonNull android.view.MotionEvent, int, int);
		method public void onSnapToItem(int, int, int);
		method public default void onSnapToItem(@NonNull android.view.MotionEvent, int);
		}

		public class SearchEvent {

core/java/android/view/HapticScrollFeedbackProvider.java

+19 −7

Original line number	Diff line number	Diff line
		@@ -17,21 +17,35 @@
		package android.view;

		import android.annotation.FlaggedApi;
		import android.annotation.IntDef;
		import android.annotation.NonNull;
		import android.view.flags.Flags;

		import com.android.internal.annotations.VisibleForTesting;

		import java.lang.annotation.Retention;
		import java.lang.annotation.RetentionPolicy;

		/**
		* {@link ScrollFeedbackProvider} that performs haptic feedback when scrolling.
		*
		* <p>Each scrolling widget should have its own instance of this class to ensure that scroll state
		* is isolated.
		*
		* <p>Check {@link ScrollFeedbackProvider} for details on the arguments that should be passed to the
		* methods in this class. To check if your input device ID, source, and motion axis are valid for
		* haptic feedback, you can use the
		* {@link ViewConfiguration#isHapticScrollFeedbackEnabled(int, int, int)} API.
		*/
		@FlaggedApi(Flags.FLAG_SCROLL_FEEDBACK_API)
		public class HapticScrollFeedbackProvider implements ScrollFeedbackProvider {
		private static final String TAG = "HapticScrollFeedbackProvider";

		/** @hide */
		@IntDef(value = {MotionEvent.AXIS_SCROLL})
		@Retention(RetentionPolicy.SOURCE)
		public @interface HapticScrollFeedbackAxis {}

		private static final int TICK_INTERVAL_NO_TICK = 0;

		private final View mView;
		@@ -46,10 +60,6 @@ public class HapticScrollFeedbackProvider implements ScrollFeedbackProvider {
		/** The {@link InputDevice} source from which the latest scroll event happened. */
		private int mSource = -1;

		/**
		* Cache for tick interval for scroll tick caused by a {@link InputDevice#SOURCE_ROTARY_ENCODER}
		* on {@link MotionEvent#AXIS_SCROLL}. Set to -1 if the value has not been fetched and cached.
		*/
		/** The tick interval corresponding to the current InputDevice/source/axis. */
		private int mTickIntervalPixels = TICK_INTERVAL_NO_TICK;
		private int mTotalScrollPixels = 0;
		@@ -68,7 +78,8 @@ public class HapticScrollFeedbackProvider implements ScrollFeedbackProvider {
		}

		@Override
		public void onScrollProgress(int inputDeviceId, int source, int axis, int deltaInPixels) {
		public void onScrollProgress(
		int inputDeviceId, int source, @HapticScrollFeedbackAxis int axis, int deltaInPixels) {
		maybeUpdateCurrentConfig(inputDeviceId, source, axis);
		if (!mHapticScrollFeedbackEnabled) {
		return;
		@@ -95,7 +106,8 @@ public class HapticScrollFeedbackProvider implements ScrollFeedbackProvider {
		}

		@Override
		public void onScrollLimit(int inputDeviceId, int source, int axis, boolean isStart) {
		public void onScrollLimit(
		int inputDeviceId, int source, @HapticScrollFeedbackAxis int axis, boolean isStart) {
		maybeUpdateCurrentConfig(inputDeviceId, source, axis);
		if (!mHapticScrollFeedbackEnabled) {
		return;
		@@ -112,7 +124,7 @@ public class HapticScrollFeedbackProvider implements ScrollFeedbackProvider {
		}

		@Override
		public void onSnapToItem(int inputDeviceId, int source, int axis) {
		public void onSnapToItem(int inputDeviceId, int source, @HapticScrollFeedbackAxis int axis) {
		maybeUpdateCurrentConfig(inputDeviceId, source, axis);
		if (!mHapticScrollFeedbackEnabled) {
		return;

core/java/android/view/ScrollFeedbackProvider.java

+65 −82

Original line number	Diff line number	Diff line
		@@ -24,120 +24,103 @@ import android.view.flags.Flags;
		* Interface to represent an entity giving consistent feedback for different events surrounding view
		* scroll.
		*
		* <p>When you have access to the {@link MotionEvent}s that triggered the different scroll events,
		* use the {@link MotionEvent} based APIs in this class. If you do not have access to the motion
		* events, you can use the methods that accept the {@link InputDevice} ID (which can be obtained by
		* APIs like {@link MotionEvent#getDeviceId()} and {@link InputDevice#getId()}) and source (which
		* can be obtained by APIs like {@link MotionEvent#getSource()}) of the motion that caused the
		* scroll events.
		* <p>The interface provides methods for the client to report different scroll events. The client
		* should report all scroll events that they want to be considered for scroll feedback using the
		* respective methods. The interface will process these events and provide scroll feedback based on
		* its specific feedback implementation.
		*
		* <h3>Obtaining the correct arguments for methods in this interface</h3>
		*
		* <p>Methods in this interface rely on the provision of valid {@link InputDevice} ID and source, as
		* well as the {@link MotionEvent} axis that generated a specific scroll event. The
		* {@link InputDevice} represented by the provided ID must have a {@link InputDevice.MotionRange}
		* with the provided source and axis. See below for more details on obtaining the right arguments
		* for your method call.
		*
		* <ul>
		*
		* <li><p><b>inputDeviceId</b>: should always be the ID of the {@link InputDevice} that generated
		* the scroll event. If calling this method in response to a {@link MotionEvent}, use the device ID
		* that is reported by the event, which can be obtained using {@link MotionEvent#getDeviceId()}.
		* Otherwise, use a valid ID that is obtained from {@link InputDevice#getId()}, or from an
		* {@link InputManager} instance ({@link InputManager#getInputDeviceIds()} gives all the valid input
		* device IDs).
		*
		* <li><p><b>source</b>: should always be the {@link InputDevice} source that generated the scroll
		* event. Use {@link MotionEvent#getSource()} if calling this method in response to a
		* {@link MotionEvent}. Otherwise, use a valid source for the {@link InputDevice}. You can use
		* {@link InputDevice#getMotionRanges()} to get all the {@link InputDevice.MotionRange}s for the
		* {@link InputDevice}, from which you can derive all the valid sources for the device.
		*
		* <li><p><b>axis</b>: should always be the axis whose axis value produced the scroll event.
		* A {@link MotionEvent} may report data for multiple axes, and each axis may have multiple data
		* points for different pointers. Use the axis whose movement produced the specific scroll event.
		* The motion value for an axis can be obtained using {@link MotionEvent#getAxisValue(int)}.
		* You can use {@link InputDevice#getMotionRanges()} to get all the {@link InputDevice.MotionRange}s
		* for the {@link InputDevice}, from which you can derive all the valid axes for the device.
		*
		* </ul>
		*
		* <b>Note</b> that not all valid input device source and motion axis inputs are necessarily
		* supported for scroll feedback. If you are implementing this interface, provide clear
		* documentation in your implementation class about which input device source and motion axis are
		* supported for your specific implementation. If you are using one of the implementations of this
		* interface, please refer to the documentation of the implementation for details on which input
		* device source and axis are supported.
		*/
		@FlaggedApi(Flags.FLAG_SCROLL_FEEDBACK_API)
		public interface ScrollFeedbackProvider {
		/**
		* Call this when the view has snapped to an item, with a motion generated by an
		* {@link InputDevice} with an id of {@code inputDeviceId}, from an input {@code source} and on
		* a given motion event {@code axis}.
		* Call this when the view has snapped to an item.
		*
		* <p>This method has the same purpose as {@link #onSnapToItem(MotionEvent, int)}. When a scroll
		* snap happens, call either this method or {@link #onSnapToItem(MotionEvent, int)}, not both.
		* This method is useful when you have no direct access to the {@link MotionEvent} that
		* caused the snap event.
		*
		* @param inputDeviceId the ID of the {@link InputDevice} that generated the motion triggering
		* the snap.
		* @param source the input source of the motion causing the snap.
		* @param axis the axis of {@code event} that caused the item to snap.
		*
		* @see #onSnapToItem(MotionEvent, int)
		*/
		void onSnapToItem(int inputDeviceId, int source, int axis);

		/**
		* Call this when the view has snapped to an item, with a motion from a given
		* {@link MotionEvent} on a given {@code axis}.
		*
		* <p>The interface is not aware of the internal scroll states of the view for which scroll
		* feedback is played. As such, the client should call
		* {@link #onScrollLimit(MotionEvent, int, int)} when scrolling has reached limit.
		*
		* @param event the {@link MotionEvent} that caused the item to snap.
		* @param axis the axis of {@code event} that caused the item to snap.
		*
		* @see #onSnapToItem(int, int, int)
		*/
		default void onSnapToItem(@NonNull MotionEvent event, int axis) {
		onSnapToItem(event.getDeviceId(), event.getSource(), axis);
		}

		/**
		* Call this when the view has reached the scroll limit when scrolled by a motion generated by
		* an {@link InputDevice} with an id of {@code inputDeviceId}, from an input {@code source} and
		* on a given motion event {@code axis}.
		* Call this when the view has reached the scroll limit.
		*
		* <p>This method has the same purpose as {@link #onScrollLimit(MotionEvent, int, boolean)}.
		* When a scroll limit happens, call either this method or
		* {@link #onScrollLimit(MotionEvent, int, boolean)}, not both. This method is useful when you
		* have no direct access to the {@link MotionEvent} that caused the scroll limit.
		* <p>Note that a feedback may not be provided on every call to this method. This interface, for
		* instance, may provide feedback on every `N`th scroll limit event. For the interface to
		* properly provide feedback when needed, call this method for each scroll limit event that you
		* want to be accounted to scroll limit feedback.
		*
		* @param inputDeviceId the ID of the {@link InputDevice} that caused scrolling to hit limit.
		* @param source the input source of the motion that caused scrolling to hit the limit.
		* @param axis the axis of {@code event} that caused scrolling to hit the limit.
		* @param isStart {@code true} if scrolling hit limit at the start of the scrolling list, and
		* {@code false} if the scrolling hit limit at the end of the scrolling list.
		*
		* @see #onScrollLimit(MotionEvent, int, boolean)
		* <i>start</i> and <i>end<i> in this context are not geometrical references.
		* Instead, they refer to the start and end of a scrolling experience. As such,
		* "start" for some views may be at the bottom of a scrolling list, while it may
		* be at the top of scrolling list for others.
		*/
		void onScrollLimit(int inputDeviceId, int source, int axis, boolean isStart);

		/**
		* Call this when the view has reached the scroll limit when scrolled by the motion from a given
		* {@link MotionEvent} on a given {@code axis}.
		*
		* @param event the {@link MotionEvent} that caused scrolling to hit the limit.
		* @param axis the axis of {@code event} that caused scrolling to hit the limit.
		* @param isStart {@code true} if scrolling hit limit at the start of the scrolling list, and
		* {@code false} if the scrolling hit limit at the end of the scrolling list.
		* Call this when the view has scrolled.
		*
		* @see #onScrollLimit(int, int, int, boolean)
		*/
		default void onScrollLimit(@NonNull MotionEvent event, int axis, boolean isStart) {
		onScrollLimit(event.getDeviceId(), event.getSource(), axis, isStart);
		}

		/**
		* Call this when the view has scrolled by {@code deltaInPixels} due to the motion generated by
		* an {@link InputDevice} with an id of {@code inputDeviceId}, from an input {@code source} and
		* on a given motion event {@code axis}.
		* <p>Different axes have different ways to map their raw axis values to pixels for scrolling.
		* When calling this method, use the scroll values in pixels by which the view was scrolled; do
		* not use the raw axis values. That is, use whatever value is passed to one of View's scrolling
		* methods (example: {@link View#scrollBy(int, int)}). For example, for vertical scrolling on
		* {@link MotionEvent#AXIS_SCROLL}, convert the raw axis value to the equivalent pixels by using
		* {@link ViewConfiguration#getScaledVerticalScrollFactor()}, and use that value for this method
		* call.
		*
		* <p>This method has the same purpose as {@link #onScrollProgress(MotionEvent, int, int)}.
		* When a scroll progress happens, call either this method or
		* {@link #onScrollProgress(MotionEvent, int, int)}, not both. This method is useful when you
		* have no direct access to the {@link MotionEvent} that caused the scroll progress.
		* <p>Note that a feedback may not be provided on every call to this method. This interface, for
		* instance, may provide feedback for every `x` pixels scrolled. For the interface to properly
		* track scroll progress and provide feedback when needed, call this method for each scroll
		* event that you want to be accounted to scroll feedback.
		*
		* @param inputDeviceId the ID of the {@link InputDevice} that caused scroll progress.
		* @param source the input source of the motion that caused scroll progress.
		* @param axis the axis of {@code event} that caused scroll progress.
		* @param deltaInPixels the amount of scroll progress, in pixels.
		*
		* @see #onScrollProgress(MotionEvent, int, int)
		*/
		void onScrollProgress(int inputDeviceId, int source, int axis, int deltaInPixels);

		/**
		* Call this when the view has scrolled by {@code deltaInPixels} due to the motion from a given
		* {@link MotionEvent} on a given {@code axis}.
		*
		* <p>The interface is not aware of the internal scroll states of the view for which scroll
		* feedback is played. As such, the client should call
		* {@link #onScrollLimit(MotionEvent, int, int)} when scrolling has reached limit.
		*
		* @param event the {@link MotionEvent} that caused scroll progress.
		* @param axis the axis of {@code event} that caused scroll progress.
		* @param deltaInPixels the amount of scroll progress, in pixels.
		*
		* @see #onScrollProgress(int, int, int, int)
		*/
		default void onScrollProgress(@NonNull MotionEvent event, int axis, int deltaInPixels) {
		onScrollProgress(event.getDeviceId(), event.getSource(), axis, deltaInPixels);
		}
		}

core/java/android/view/ViewConfiguration.java

+28 −20

Original line number	Diff line number	Diff line
		@@ -1220,36 +1220,39 @@ public class ViewConfiguration {
		* Checks if any kind of scroll haptic feedback is enabled for a motion generated by a specific
		* input device configuration and motion axis.
		*
		* <h3>Obtaining the correct arguments for this method call</h3>
		* <p><b>inputDeviceId</b>: if calling this method in response to a {@link MotionEvent}, use
		* the device ID that is reported by the event, which can be obtained using
		* {@link MotionEvent#getDeviceId()}. Otherwise, use a valid ID that is obtained from
		* {@link InputDevice#getId()}, or from an {@link InputManager} instance
		* ({@link InputManager#getInputDeviceIds()} gives all the valid input device IDs).
		* <p>See {@link ScrollFeedbackProvider} for details on the arguments that should be passed to
		* the methods in this class.
		*
		* <p><b>axis</b>: a {@link MotionEvent} may report data for multiple axes, and each axis may
		* have multiple data points for different pointers. Use the axis whose movement produced the
		* scrolls that would generate the scroll haptics. You can use
		* {@link InputDevice#getMotionRanges()} to get all the {@link InputDevice.MotionRange}s for the
		* {@link InputDevice}, from which you can derive all the valid axes for the device.
		* <p>If the provided input device ID, source, and motion axis are not supported by this Android
		* device, this method returns {@code false}. In other words, if the {@link InputDevice}
		* represented by the provided {code inputDeviceId} does not have a
		* {@link InputDevice.MotionRange} with the provided {@code axis} and {@code source}, the method
		* returns {@code false}.
		*
		* <p><b>source</b>: use {@link MotionEvent#getSource()} if calling this method in response to a
		* {@link MotionEvent}. Otherwise, use a valid source for the {@link InputDevice}. You can use
		* {@link InputDevice#getMotionRanges()} to get all the {@link InputDevice.MotionRange}s for the
		* {@link InputDevice}, from which you can derive all the valid sources for the device.
		* <p>If the provided input device ID, source, and motion axis are supported by this Android
		* device, this method returns {@code true} only if the provided arguments are supported for
		* scroll haptics. Otherwise, this method returns {@code false}.
		*
		* @param inputDeviceId the ID of the {@link InputDevice} that generated the motion that may
		* produce scroll haptics.
		* @param source the input source of the motion that may produce scroll haptics.
		* @param axis the axis of the motion that may produce scroll haptics.
		* @return {@code true} if motions generated by the provided input and motion configuration
		* should produce scroll haptics. {@code false} otherwise.
		* can produce scroll haptics. {@code false} otherwise.
		*
		* @see #getHapticScrollFeedbackTickInterval(int, int, int)
		* @see InputDevice#getMotionRanges()
		* @see InputDevice#getMotionRange(int)
		* @see InputDevice#getMotionRange(int, int)
		*/
		@FlaggedApi(Flags.FLAG_SCROLL_FEEDBACK_API)
		public boolean isHapticScrollFeedbackEnabled(int inputDeviceId, int axis, int source) {
		public boolean isHapticScrollFeedbackEnabled(
		int inputDeviceId,
		@HapticScrollFeedbackProvider.HapticScrollFeedbackAxis int axis,
		int source) {
		if (!isInputDeviceInfoValid(inputDeviceId, axis, source)) return false;

		if (source == InputDevice.SOURCE_ROTARY_ENCODER) {
		if (source == InputDevice.SOURCE_ROTARY_ENCODER && axis == MotionEvent.AXIS_SCROLL) {
		return mRotaryEncoderHapticScrollFeedbackEnabled;
		}

		@@ -1285,9 +1288,14 @@ public class ViewConfiguration {
		* configuration. If scroll haptics is disabled for the given configuration, or if the
		* device does not support scroll tick haptics for the given configuration, this method
		* returns {@code Integer.MAX_VALUE}.
		*
		* @see #isHapticScrollFeedbackEnabled(int, int, int)
		*/
		@FlaggedApi(Flags.FLAG_SCROLL_FEEDBACK_API)
		public int getHapticScrollFeedbackTickInterval(int inputDeviceId, int axis, int source) {
		public int getHapticScrollFeedbackTickInterval(
		int inputDeviceId,
		@HapticScrollFeedbackProvider.HapticScrollFeedbackAxis int axis,
		int source) {
		if (!mRotaryEncoderHapticScrollFeedbackEnabled) {
		return NO_HAPTIC_SCROLL_TICK_INTERVAL;
		}
		@@ -1296,7 +1304,7 @@ public class ViewConfiguration {
		return NO_HAPTIC_SCROLL_TICK_INTERVAL;
		}

		if (source == InputDevice.SOURCE_ROTARY_ENCODER) {
		if (source == InputDevice.SOURCE_ROTARY_ENCODER && axis == MotionEvent.AXIS_SCROLL) {
		return mRotaryEncoderHapticScrollFeedbackTickIntervalPixels;
		}

core/java/android/widget/AbsListView.java

+4 −2

Original line number	Diff line number	Diff line
		@@ -4520,7 +4520,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		if (!trackMotionScroll(delta, delta)) {
		if (Flags.platformWidgetHapticScrollFeedback()) {
		initHapticScrollFeedbackProviderIfNotExists();
		mHapticScrollFeedbackProvider.onScrollProgress(event, axis, delta);
		mHapticScrollFeedbackProvider.onScrollProgress(
		event.getDeviceId(), event.getSource(), axis, delta);
		}
		initDifferentialFlingHelperIfNotExists();
		mDifferentialMotionFlingHelper.onMotionEvent(event, axis);
		@@ -4536,7 +4537,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		if (Flags.platformWidgetHapticScrollFeedback()) {
		initHapticScrollFeedbackProviderIfNotExists();
		mHapticScrollFeedbackProvider.onScrollLimit(
		event, axis, /* isStart= */ hitTopLimit);
		event.getDeviceId(), event.getSource(), axis,
		/* isStart= */ hitTopLimit);
		}
		if (hitTopLimit) {
		mEdgeGlowTop.onPullDistance(overscroll, 0.5f);