Allow fling during stretch in ListView (d317ef65) · Commits · e / os / android_frameworks_base

core/java/android/widget/AbsListView.java

+143 −131

Original line number	Diff line number	Diff line
		@@ -88,6 +88,7 @@ import android.view.inspector.InspectableProperty.EnumEntry;
		import android.widget.RemoteViews.InteractionHandler;

		import com.android.internal.R;
		import com.android.internal.annotations.VisibleForTesting;

		import java.util.ArrayList;
		import java.util.List;
		@@ -712,20 +713,24 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		*
		* Even though this field is practically final, we cannot make it final because there are apps
		* setting it via reflection and they need to keep working until they target Q.
		* @hide
		*/
		@NonNull
		@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123769408)
		private EdgeEffect mEdgeGlowTop;
		@VisibleForTesting
		public EdgeEffect mEdgeGlowTop;

		/**
		* Tracks the state of the bottom edge glow.
		*
		* Even though this field is practically final, we cannot make it final because there are apps
		* setting it via reflection and they need to keep working until they target Q.
		* @hide
		*/
		@NonNull
		@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123768444)
		private EdgeEffect mEdgeGlowBottom;
		@VisibleForTesting
		public EdgeEffect mEdgeGlowBottom;

		/**
		* An estimate of how many pixels are between the top of the list and
		@@ -4116,7 +4121,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		}

		final float x = ev.getX();
		final boolean inList = x > mListPadding.left && x < getWidth() - mListPadding.right;
		final boolean inList =
		x > mListPadding.left && x < getWidth() - mListPadding.right;
		if (inList && !child.hasExplicitFocusable()) {
		if (mPerformClick == null) {
		mPerformClick = new PerformClick();
		@@ -4129,8 +4135,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		mResurrectToPosition = motionPosition;

		if (mTouchMode == TOUCH_MODE_DOWN \|\| mTouchMode == TOUCH_MODE_TAP) {
		removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ?
		mPendingCheckForTap : mPendingCheckForLongPress);
		removeCallbacks(mTouchMode == TOUCH_MODE_DOWN
		? mPendingCheckForTap : mPendingCheckForLongPress);
		mLayoutMode = LAYOUT_NORMAL;
		if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
		mTouchMode = TOUCH_MODE_TAP;
		@@ -4156,7 +4162,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		mTouchMode = TOUCH_MODE_REST;
		child.setPressed(false);
		setPressed(false);
		if (!mDataChanged && !mIsDetaching && isAttachedToWindow()) {
		if (!mDataChanged && !mIsDetaching
		&& isAttachedToWindow()) {
		performClick.run();
		}
		}
		@@ -4183,9 +4190,9 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		final int lastChildBottom = getChildAt(childCount - 1).getBottom();
		final int contentTop = mListPadding.top;
		final int contentBottom = getHeight() - mListPadding.bottom;
		if (mFirstPosition == 0 && firstChildTop >= contentTop &&
		mFirstPosition + childCount < mItemCount &&
		lastChildBottom <= getHeight() - contentBottom) {
		if (mFirstPosition == 0 && firstChildTop >= contentTop
		&& mFirstPosition + childCount < mItemCount
		&& lastChildBottom <= getHeight() - contentBottom) {
		mTouchMode = TOUCH_MODE_REST;
		reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
		} else {
		@@ -4199,11 +4206,16 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		// allow the weird behavior where you can scroll to a boundary then
		// fling further.
		boolean flingVelocity = Math.abs(initialVelocity) > mMinimumVelocity;
		if (flingVelocity &&
		!((mFirstPosition == 0 &&
		firstChildTop == contentTop - mOverscrollDistance) \|\|
		(mFirstPosition + childCount == mItemCount &&
		lastChildBottom == contentBottom + mOverscrollDistance))) {
		if (flingVelocity && !mEdgeGlowTop.isFinished()) {
		mEdgeGlowTop.onAbsorb(initialVelocity);
		} else if (flingVelocity && !mEdgeGlowBottom.isFinished()) {
		mEdgeGlowBottom.onAbsorb(-initialVelocity);
		} else if (flingVelocity
		&& !((mFirstPosition == 0
		&& firstChildTop == contentTop - mOverscrollDistance)
		\|\| (mFirstPosition + childCount == mItemCount
		&& lastChildBottom == contentBottom + mOverscrollDistance))
		) {
		if (!dispatchNestedPreFling(0, -initialVelocity)) {
		if (mFlingRunnable == null) {
		mFlingRunnable = new FlingRunnable();