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Made translation of headers consistent when going into the shelf

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Previously the headers weren't moving up similar to the content.
This is now happening.

Fixes: 133258119
Test: atest SystemUITests
Change-Id: I3e8594f6a28234373a7f3a2b26b6522850526816
This commit is contained in:
Selim Cinek
2020-02-25 12:39:00 -08:00
parent d1695408ab
commit 6df1385b01
10 changed files with 214 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
packages/SystemUI/res/layout/people_strip.xml
View File

@@ -31,13 +31,16 @@
android:layout_height="match_parent"
android:layout_marginEnd="8dp"
android:gravity="bottom"
android:orientation="horizontal">
android:orientation="horizontal"
android:forceHasOverlappingRendering="false"
android:clipChildren="false">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="start|center_vertical"
android:layout_weight="1">
android:layout_weight="1"
android:forceHasOverlappingRendering="false">
<TextView
style="@style/TextAppearance.NotificationSectionHeaderButton"
@@ -53,6 +56,7 @@
android:layout_height="48dp"
android:padding="8dp"
android:scaleType="fitCenter"
android:forceHasOverlappingRendering="false"
/>
<ImageView
@@ -60,6 +64,7 @@
android:layout_height="48dp"
android:padding="8dp"
android:scaleType="fitCenter"
android:forceHasOverlappingRendering="false"
/>
<ImageView
@@ -67,6 +72,7 @@
android:layout_height="48dp"
android:padding="8dp"
android:scaleType="fitCenter"
android:forceHasOverlappingRendering="false"
/>
<ImageView
@@ -74,6 +80,7 @@
android:layout_height="48dp"
android:padding="8dp"
android:scaleType="fitCenter"
android:forceHasOverlappingRendering="false"
/>
<ImageView
@@ -81,6 +88,7 @@
android:layout_height="48dp"
android:padding="8dp"
android:scaleType="fitCenter"
android:forceHasOverlappingRendering="false"
/>
</LinearLayout>

2
packages/SystemUI/res/layout/status_bar_notification_section_header.xml
View File

@@ -32,6 +32,8 @@
android:layout_gravity="bottom"
android:gravity="center_vertical"
android:orientation="horizontal"
android:forceHasOverlappingRendering="false"
android:clipChildren="false"
>
<include layout="@layout/status_bar_notification_section_header_contents"/>
</LinearLayout>

2
packages/SystemUI/res/layout/status_bar_notification_section_header_contents.xml
View File

@@ -27,6 +27,7 @@
android:id="@+id/header_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:forceHasOverlappingRendering="false"
android:text="@string/notification_section_header_gentle"
/>
@@ -41,5 +42,6 @@
android:tint="?attr/wallpaperTextColor"
android:tintMode="src_in"
android:visibility="gone"
android:forceHasOverlappingRendering="false"
/>
</merge>

4
packages/SystemUI/res/values/dimens.xml
View File

@@ -181,8 +181,8 @@
<!-- Vertical translation of pulsing notification animations -->
<dimen name="pulsing_notification_appear_translation">10dp</dimen>
<!-- The amount the content shifts upwards when transforming into the icon -->
<dimen name="notification_icon_transform_content_shift">32dp</dimen>
<!-- The amount the content shifts upwards when transforming into the shelf -->
<dimen name="shelf_transform_content_shift">32dp</dimen>
<!-- The padding on the bottom of the notifications on the keyguard -->
<dimen name="keyguard_indication_bottom_padding">12sp</dimen>

164
packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
View File

@@ -291,14 +291,13 @@ public class NotificationShelf extends ActivatableNotificationView implements
int clipTop = updateNotificationClipHeight(child, notificationClipEnd, notGoneIndex);
clipTopAmount = Math.max(clipTop, clipTopAmount);
float inShelfAmount = updateShelfTransformation(child, expandAmount, scrolling,
scrollingFast, expandingAnimated, isLastChild);
// If the current row is an ExpandableNotificationRow, update its color, roundedness,
// and icon state.
if (child instanceof ExpandableNotificationRow) {
ExpandableNotificationRow expandableRow = (ExpandableNotificationRow) child;
float inShelfAmount = updateIconAppearance(expandableRow, expandAmount, scrolling,
scrollingFast,
expandingAnimated, isLastChild);
numViewsInShelf += inShelfAmount;
int ownColorUntinted = expandableRow.getBackgroundColorWithoutTint();
if (rowTranslationY >= shelfStart && mNotGoneIndex == -1) {
@@ -525,31 +524,28 @@ public class NotificationShelf extends ActivatableNotificationView implements
}
/**
* @return the icon amount how much this notification is in the shelf;
* @return the amount how much this notification is in the shelf
*/
private float updateIconAppearance(ExpandableNotificationRow row, float expandAmount,
private float updateShelfTransformation(ExpandableView view, float expandAmount,
boolean scrolling, boolean scrollingFast, boolean expandingAnimated,
boolean isLastChild) {
StatusBarIconView icon = row.getEntry().expandedIcon;
StatusBarIconView icon = view.getShelfIcon();
NotificationIconContainer.IconState iconState = getIconState(icon);
if (iconState == null) {
return 0.0f;
}
// Let calculate how much the view is in the shelf
float viewStart = row.getTranslationY();
int fullHeight = row.getActualHeight() + mPaddingBetweenElements;
float viewStart = view.getTranslationY();
int fullHeight = view.getActualHeight() + mPaddingBetweenElements;
float iconTransformDistance = getIntrinsicHeight() * 1.5f;
iconTransformDistance *= NotificationUtils.interpolate(1.f, 1.5f, expandAmount);
iconTransformDistance = Math.min(iconTransformDistance, fullHeight);
if (isLastChild) {
fullHeight = Math.min(fullHeight, row.getMinHeight() - getIntrinsicHeight());
iconTransformDistance = Math.min(iconTransformDistance, row.getMinHeight()
fullHeight = Math.min(fullHeight, view.getMinHeight() - getIntrinsicHeight());
iconTransformDistance = Math.min(iconTransformDistance, view.getMinHeight()
- getIntrinsicHeight());
}
float viewEnd = viewStart + fullHeight;
// TODO: fix this check for anchor scrolling.
if (expandingAnimated && mAmbientState.getScrollY() == 0
if (iconState != null && expandingAnimated && mAmbientState.getScrollY() == 0
&& !mAmbientState.isOnKeyguard() && !iconState.isLastExpandIcon) {
// We are expanding animated. Because we switch to a linear interpolation in this case,
// the last icon may be stuck in between the shelf position and the notification
@@ -559,10 +555,10 @@ public class NotificationShelf extends ActivatableNotificationView implements
// We need to persist this, since after the expansion, the behavior should still be the
// same.
float position = mAmbientState.getIntrinsicPadding()
+ mHostLayout.getPositionInLinearLayout(row);
+ mHostLayout.getPositionInLinearLayout(view);
int maxShelfStart = mMaxLayoutHeight - getIntrinsicHeight();
if (position < maxShelfStart && position + row.getIntrinsicHeight() >= maxShelfStart
&& row.getTranslationY() < position) {
if (position < maxShelfStart && position + view.getIntrinsicHeight() >= maxShelfStart
&& view.getTranslationY() < position) {
iconState.isLastExpandIcon = true;
iconState.customTransformHeight = NO_VALUE;
// Let's check if we're close enough to snap into the shelf
@@ -577,16 +573,16 @@ public class NotificationShelf extends ActivatableNotificationView implements
}
}
float fullTransitionAmount;
float iconTransitionAmount;
float transitionAmount;
float shelfStart = getTranslationY();
if (iconState.hasCustomTransformHeight()) {
if (iconState != null && iconState.hasCustomTransformHeight()) {
fullHeight = iconState.customTransformHeight;
iconTransformDistance = iconState.customTransformHeight;
}
boolean fullyInOrOut = true;
if (viewEnd >= shelfStart && (!mAmbientState.isUnlockHintRunning() || row.isInShelf())
if (viewEnd >= shelfStart && (!mAmbientState.isUnlockHintRunning() || view.isInShelf())
&& (mAmbientState.isShadeExpanded()
|| (!row.isPinned() && !row.isHeadsUpAnimatingAway()))) {
|| (!view.isPinned() && !view.isHeadsUpAnimatingAway()))) {
if (viewStart < shelfStart) {
float fullAmount = (shelfStart - viewStart) / fullHeight;
fullAmount = Math.min(1.0f, fullAmount);
@@ -596,88 +592,98 @@ public class NotificationShelf extends ActivatableNotificationView implements
interpolatedAmount, fullAmount, expandAmount);
fullTransitionAmount = 1.0f - interpolatedAmount;
iconTransitionAmount = (shelfStart - viewStart) / iconTransformDistance;
iconTransitionAmount = Math.min(1.0f, iconTransitionAmount);
iconTransitionAmount = 1.0f - iconTransitionAmount;
transitionAmount = (shelfStart - viewStart) / iconTransformDistance;
transitionAmount = Math.min(1.0f, transitionAmount);
transitionAmount = 1.0f - transitionAmount;
fullyInOrOut = false;
} else {
fullTransitionAmount = 1.0f;
iconTransitionAmount = 1.0f;
transitionAmount = 1.0f;
}
} else {
fullTransitionAmount = 0.0f;
iconTransitionAmount = 0.0f;
transitionAmount = 0.0f;
}
if (fullyInOrOut && !expandingAnimated && iconState.isLastExpandIcon) {
if (iconState != null && fullyInOrOut && !expandingAnimated && iconState.isLastExpandIcon) {
iconState.isLastExpandIcon = false;
iconState.customTransformHeight = NO_VALUE;
}
updateIconPositioning(row, iconTransitionAmount, fullTransitionAmount,
updateIconPositioning(view, transitionAmount, fullTransitionAmount,
iconTransformDistance, scrolling, scrollingFast, expandingAnimated, isLastChild);
return fullTransitionAmount;
}
private void updateIconPositioning(ExpandableNotificationRow row, float iconTransitionAmount,
private void updateIconPositioning(ExpandableView view, float iconTransitionAmount,
float fullTransitionAmount, float iconTransformDistance, boolean scrolling,
boolean scrollingFast, boolean expandingAnimated, boolean isLastChild) {
StatusBarIconView icon = row.getEntry().expandedIcon;
StatusBarIconView icon = view.getShelfIcon();
NotificationIconContainer.IconState iconState = getIconState(icon);
float contentTransformationAmount;
if (iconState == null) {
return;
}
boolean forceInShelf = iconState.isLastExpandIcon && !iconState.hasCustomTransformHeight();
float clampedAmount = iconTransitionAmount > 0.5f ? 1.0f : 0.0f;
if (clampedAmount == fullTransitionAmount) {
iconState.noAnimations = (scrollingFast || expandingAnimated) && !forceInShelf;
iconState.useFullTransitionAmount = iconState.noAnimations
|| (!ICON_ANMATIONS_WHILE_SCROLLING && fullTransitionAmount == 0.0f && scrolling);
iconState.useLinearTransitionAmount = !ICON_ANMATIONS_WHILE_SCROLLING
&& fullTransitionAmount == 0.0f && !mAmbientState.isExpansionChanging();
iconState.translateContent = mMaxLayoutHeight - getTranslationY()
- getIntrinsicHeight() > 0;
}
if (!forceInShelf && (scrollingFast || (expandingAnimated
&& iconState.useFullTransitionAmount && !ViewState.isAnimatingY(icon)))) {
iconState.cancelAnimations(icon);
iconState.useFullTransitionAmount = true;
iconState.noAnimations = true;
}
if (iconState.hasCustomTransformHeight()) {
iconState.useFullTransitionAmount = true;
}
if (iconState.isLastExpandIcon) {
iconState.translateContent = false;
}
float transitionAmount;
if (mAmbientState.isHiddenAtAll() && !row.isInShelf()) {
transitionAmount = mAmbientState.isFullyHidden() ? 1 : 0;
} else if (isLastChild || !USE_ANIMATIONS_WHEN_OPENING || iconState.useFullTransitionAmount
|| iconState.useLinearTransitionAmount) {
transitionAmount = iconTransitionAmount;
contentTransformationAmount = iconTransitionAmount;
} else {
// We take the clamped position instead
transitionAmount = clampedAmount;
iconState.needsCannedAnimation = iconState.clampedAppearAmount != clampedAmount
&& !mNoAnimationsInThisFrame;
}
iconState.iconAppearAmount = !USE_ANIMATIONS_WHEN_OPENING
boolean forceInShelf =
iconState.isLastExpandIcon && !iconState.hasCustomTransformHeight();
float clampedAmount = iconTransitionAmount > 0.5f ? 1.0f : 0.0f;
if (clampedAmount == fullTransitionAmount) {
iconState.noAnimations = (scrollingFast || expandingAnimated) && !forceInShelf;
iconState.useFullTransitionAmount = iconState.noAnimations
|| (!ICON_ANMATIONS_WHILE_SCROLLING && fullTransitionAmount == 0.0f
&& scrolling);
iconState.useLinearTransitionAmount = !ICON_ANMATIONS_WHILE_SCROLLING
&& fullTransitionAmount == 0.0f && !mAmbientState.isExpansionChanging();
iconState.translateContent = mMaxLayoutHeight - getTranslationY()
- getIntrinsicHeight() > 0;
}
if (!forceInShelf && (scrollingFast || (expandingAnimated
&& iconState.useFullTransitionAmount && !ViewState.isAnimatingY(icon)))) {
iconState.cancelAnimations(icon);
iconState.useFullTransitionAmount = true;
iconState.noAnimations = true;
}
if (iconState.hasCustomTransformHeight()) {
iconState.useFullTransitionAmount = true;
}
if (iconState.isLastExpandIcon) {
iconState.translateContent = false;
}
float transitionAmount;
if (mAmbientState.isHiddenAtAll() && !view.isInShelf()) {
transitionAmount = mAmbientState.isFullyHidden() ? 1 : 0;
} else if (isLastChild || !USE_ANIMATIONS_WHEN_OPENING
|| iconState.useFullTransitionAmount
? fullTransitionAmount
: transitionAmount;
iconState.clampedAppearAmount = clampedAmount;
float contentTransformationAmount = !row.isAboveShelf() && !row.showingPulsing()
|| iconState.useLinearTransitionAmount) {
transitionAmount = iconTransitionAmount;
} else {
// We take the clamped position instead
transitionAmount = clampedAmount;
iconState.needsCannedAnimation = iconState.clampedAppearAmount != clampedAmount
&& !mNoAnimationsInThisFrame;
}
iconState.iconAppearAmount = !USE_ANIMATIONS_WHEN_OPENING
|| iconState.useFullTransitionAmount
? fullTransitionAmount
: transitionAmount;
iconState.clampedAppearAmount = clampedAmount;
contentTransformationAmount = !view.isAboveShelf() && !view.showingPulsing()
&& (isLastChild || iconState.translateContent)
? iconTransitionAmount
: 0.0f;
row.setContentTransformationAmount(contentTransformationAmount, isLastChild);
setIconTransformationAmount(row, transitionAmount, iconTransformDistance,
clampedAmount != transitionAmount, isLastChild);
? iconTransitionAmount
: 0.0f;
setIconTransformationAmount(view, transitionAmount, iconTransformDistance,
clampedAmount != transitionAmount, isLastChild);
}
view.setContentTransformationAmount(contentTransformationAmount, isLastChild);
}
private void setIconTransformationAmount(ExpandableNotificationRow row,
private void setIconTransformationAmount(ExpandableView view,
float transitionAmount, float iconTransformDistance, boolean usingLinearInterpolation,
boolean isLastChild) {
StatusBarIconView icon = row.getEntry().expandedIcon;
if (!(view instanceof ExpandableNotificationRow)) {
return;
}
ExpandableNotificationRow row = (ExpandableNotificationRow) view;
StatusBarIconView icon = row.getShelfIcon();
NotificationIconContainer.IconState iconState = getIconState(icon);
View rowIcon = row.getNotificationIcon();

36
packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
View File

@@ -138,7 +138,6 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
private LayoutListener mLayoutListener;
private RowContentBindStage mRowContentBindStage;
private int mIconTransformContentShift;
private int mIconTransformContentShiftNoIcon;
private int mMaxHeadsUpHeightBeforeN;
private int mMaxHeadsUpHeightBeforeP;
private int mMaxHeadsUpHeight;
@@ -307,10 +306,8 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
private boolean mHeadsupDisappearRunning;
private View mChildAfterViewWhenDismissed;
private View mGroupParentWhenDismissed;
private float mContentTransformationAmount;
private boolean mIconsVisible = true;
private boolean mAboveShelf;
private boolean mIsLastChild;
private Runnable mOnDismissRunnable;
private boolean mIsLowPriority;
private boolean mIsColorized;
@@ -1485,18 +1482,19 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
updateIconVisibilities();
}
private void updateContentTransformation() {
@Override
protected void updateContentTransformation() {
if (mExpandAnimationRunning) {
return;
}
float contentAlpha;
float translationY = -mContentTransformationAmount * mIconTransformContentShift;
if (mIsLastChild) {
contentAlpha = 1.0f - mContentTransformationAmount;
contentAlpha = Math.min(contentAlpha / 0.5f, 1.0f);
contentAlpha = Interpolators.ALPHA_OUT.getInterpolation(contentAlpha);
translationY *= 0.4f;
} else {
super.updateContentTransformation();
}
@Override
protected void applyContentTransformation(float contentAlpha, float translationY) {
super.applyContentTransformation(contentAlpha, translationY);
if (!mIsLastChild) {
// Don't fade views unless we're last
contentAlpha = 1.0f;
}
for (NotificationContentView l : mLayouts) {
@@ -1649,8 +1647,6 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
Resources res = getResources();
mIncreasedPaddingBetweenElements = res.getDimensionPixelSize(
R.dimen.notification_divider_height_increased);
mIconTransformContentShiftNoIcon = res.getDimensionPixelSize(
R.dimen.notification_icon_transform_content_shift);
mEnableNonGroupedNotificationExpand =
res.getBoolean(R.bool.config_enableNonGroupedNotificationExpand);
mShowGroupBackgroundWhenExpanded =
@@ -2113,6 +2109,11 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
return mChildIsExpanding;
}
@Override
public StatusBarIconView getShelfIcon() {
return getEntry().expandedIcon;
}
@Override
protected boolean shouldClipToActualHeight() {
return super.shouldClipToActualHeight() && !mExpandAnimationRunning;
@@ -2449,10 +2450,15 @@ public class ExpandableNotificationRow extends ActivatableNotificationView
CachingIconView icon = notificationHeader.getIcon();
mIconTransformContentShift = getRelativeTopPadding(icon) + icon.getHeight();
} else {
mIconTransformContentShift = mIconTransformContentShiftNoIcon;
mIconTransformContentShift = mContentShift;
}
}
@Override
protected float getContentTransformationShift() {
return mIconTransformContentShift;
}
@Override
public void notifyHeightChanged(boolean needsAnimation) {
super.notifyHeightChanged(needsAnimation);

74
packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableView.java
View File

@@ -18,6 +18,7 @@ package com.android.systemui.statusbar.notification.row;
import android.animation.AnimatorListenerAdapter;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
@@ -28,6 +29,9 @@ import android.widget.FrameLayout;
import androidx.annotation.Nullable;
import com.android.systemui.Dumpable;
import com.android.systemui.Interpolators;
import com.android.systemui.R;
import com.android.systemui.statusbar.StatusBarIconView;
import com.android.systemui.statusbar.notification.stack.ExpandableViewState;
import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout;
@@ -58,11 +62,26 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
private ViewGroup mTransientContainer;
private boolean mInShelf;
private boolean mTransformingInShelf;
protected float mContentTransformationAmount;
protected boolean mIsLastChild;
protected int mContentShift;
private final ExpandableViewState mViewState;
public ExpandableView(Context context, AttributeSet attrs) {
super(context, attrs);
mViewState = createExpandableViewState();
initDimens();
}
private void initDimens() {
mContentShift = getResources().getDimensionPixelSize(
R.dimen.shelf_transform_content_shift);
}
@Override
protected void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
initDimens();
}
@Override
@@ -594,7 +613,7 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
/**
* @return whether the current view doesn't add height to the overall content. This means that
* if it is added to a list of items, it's content will still have the same height.
* if it is added to a list of items, its content will still have the same height.
* An example is the notification shelf, that is always placed on top of another view.
*/
public boolean hasNoContentHeight() {
@@ -612,6 +631,59 @@ public abstract class ExpandableView extends FrameLayout implements Dumpable {
return mInShelf;
}
public @Nullable StatusBarIconView getShelfIcon() {
return null;
}
/**
* Set how much this notification is transformed into the shelf.
*
* @param contentTransformationAmount A value from 0 to 1 indicating how much we are transformed
* to the content away
* @param isLastChild is this the last child in the list. If true, then the transformation is
* different since its content fades out.
*/
public void setContentTransformationAmount(float contentTransformationAmount,
boolean isLastChild) {
boolean changeTransformation = isLastChild != mIsLastChild;
changeTransformation |= mContentTransformationAmount != contentTransformationAmount;
mIsLastChild = isLastChild;
mContentTransformationAmount = contentTransformationAmount;
if (changeTransformation) {
updateContentTransformation();
}
}
/**
* Update the content representation based on the amount we are transformed into the shelf.
*/
protected void updateContentTransformation() {
float translationY = -mContentTransformationAmount * getContentTransformationShift();
float contentAlpha = 1.0f - mContentTransformationAmount;
contentAlpha = Math.min(contentAlpha / 0.5f, 1.0f);
contentAlpha = Interpolators.ALPHA_OUT.getInterpolation(contentAlpha);
if (mIsLastChild) {
translationY *= 0.4f;
}
applyContentTransformation(contentAlpha, translationY);
}
/**
* @return how much the content shifts up when going into the shelf
*/
protected float getContentTransformationShift() {
return mContentShift;
}
/**
* Apply the contentTransformation when going into the shelf.
*
* @param contentAlpha The alpha that should be applied
* @param translationY the translationY that should be applied
*/
protected void applyContentTransformation(float contentAlpha, float translationY) {
}
/**
* @param transformingInShelf whether the view is currently transforming into the shelf in an
* animated way

1
packages/SystemUI/src/com/android/systemui/statusbar/notification/row/StackScrollerDecorView.java
View File

@@ -49,6 +49,7 @@ public abstract class StackScrollerDecorView extends ExpandableView {
public StackScrollerDecorView(Context context, AttributeSet attrs) {
super(context, attrs);
setClipChildren(false);
}
@Override

9
packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/PeopleHubView.kt
View File

@@ -80,6 +80,15 @@ class PeopleHubView(context: Context, attrs: AttributeSet) :
return true
}
override fun applyContentTransformation(contentAlpha: Float, translationY: Float) {
super.applyContentTransformation(contentAlpha, translationY)
for (i in 0 until contents.childCount) {
val view = contents.getChildAt(i)
view.alpha = contentAlpha
view.translationY = translationY
}
}
private inner class PersonDataListenerImpl(val avatarView: ImageView) :
DataListener<PersonViewModel?> {

9
packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/SectionHeaderView.java
View File

@@ -108,6 +108,15 @@ public class SectionHeaderView extends StackScrollerDecorView {
mLabelView.setOnClickListener(listener);
}
@Override
protected void applyContentTransformation(float contentAlpha, float translationY) {
super.applyContentTransformation(contentAlpha, translationY);
mLabelView.setAlpha(contentAlpha);
mLabelView.setTranslationY(translationY);
mClearAllButton.setAlpha(contentAlpha);
mClearAllButton.setTranslationY(translationY);
}
/** Fired when the user clicks on the "X" button on the far right of the header. */
void setOnClearAllClickListener(View.OnClickListener listener) {
mOnClearClickListener = listener;