* Many aspects of the base GuidedActionsStylist can be customized through theming; see the * theme attributes below. Note that these attributes are not set on individual elements in layout * XML, but instead would be set in a custom theme. See * Styles and Themes * for more information. *
* If these hooks are insufficient, this class may also be subclassed. Subclasses may wish to * override the {@link #onProvideLayoutId} method to change the layout used to display the * list container and selector, or the {@link #onProvideItemLayoutId} method to change the layout * used to display each action. *
* Note: If an alternate list layout is provided, the following view IDs must be supplied: *
* These view IDs must be present in order for the stylist to function. The list ID must correspond * to a {@link VerticalGridView} or subclass. *
* If an alternate item layout is provided, the following view IDs should be used to refer to base * elements: *
* These view IDs are allowed to be missing, in which case the corresponding views in {@link * GuidedActionsStylist.ViewHolder} will be null. *
* In order to support editable actions, the view associated with guidedactions_item_title should * be a subclass of {@link android.widget.EditText}, and should satisfy the {@link * ImeKeyMonitor} interface. * * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedStepImeAppearingAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedStepImeDisappearingAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionsSelectorShowAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionsSelectorHideAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionsSelectorStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionsListStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemContainerStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemCheckmarkStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemIconStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemContentStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemTitleStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemDescriptionStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionItemChevronStyle * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionPressedAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionUnpressedAnimation * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionEnabledChevronAlpha * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionDisabledChevronAlpha * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionTitleMinLines * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionTitleMaxLines * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionDescriptionMinLines * @attr ref android.support.v17.leanback.R.styleable#LeanbackGuidedStepTheme_guidedActionVerticalPadding * @see android.R.styleable#Theme_listChoiceIndicatorSingle * @see android.R.styleable#Theme_listChoiceIndicatorMultiple * @see android.support.v17.leanback.app.GuidedStepFragment * @see GuidedAction */ public class GuidedActionsStylist implements FragmentAnimationProvider { /** * Default viewType that associated with default layout Id for the action item. * @see #getItemViewType(GuidedAction) * @see #onProvideItemLayoutId(int) * @see #onCreateViewHolder(ViewGroup, int) */ public static final int VIEW_TYPE_DEFAULT = 0; /** * ViewHolder caches information about the action item layouts' subviews. Subclasses of {@link * GuidedActionsStylist} may also wish to subclass this in order to add fields. * @see GuidedAction */ public static class ViewHolder { public final View view; private View mContentView; private TextView mTitleView; private TextView mDescriptionView; private ImageView mIconView; private ImageView mCheckmarkView; private ImageView mChevronView; private boolean mInEditing; private boolean mInEditingDescription; /** * Constructs an ViewHolder and caches the relevant subviews. */ public ViewHolder(View v) { view = v; mContentView = v.findViewById(R.id.guidedactions_item_content); mTitleView = (TextView) v.findViewById(R.id.guidedactions_item_title); mDescriptionView = (TextView) v.findViewById(R.id.guidedactions_item_description); mIconView = (ImageView) v.findViewById(R.id.guidedactions_item_icon); mCheckmarkView = (ImageView) v.findViewById(R.id.guidedactions_item_checkmark); mChevronView = (ImageView) v.findViewById(R.id.guidedactions_item_chevron); } /** * Returns the content view within this view holder's view, where title and description are * shown. */ public View getContentView() { return mContentView; } /** * Returns the title view within this view holder's view. */ public TextView getTitleView() { return mTitleView; } /** * Convenience method to return an editable version of the title, if possible, * or null if the title view isn't an EditText. */ public EditText getEditableTitleView() { return (mTitleView instanceof EditText) ? (EditText)mTitleView : null; } /** * Returns the description view within this view holder's view. */ public TextView getDescriptionView() { return mDescriptionView; } /** * Convenience method to return an editable version of the description, if possible, * or null if the description view isn't an EditText. */ public EditText getEditableDescriptionView() { return (mDescriptionView instanceof EditText) ? (EditText)mDescriptionView : null; } /** * Returns the icon view within this view holder's view. */ public ImageView getIconView() { return mIconView; } /** * Returns the checkmark view within this view holder's view. */ public ImageView getCheckmarkView() { return mCheckmarkView; } /** * Returns the chevron view within this view holder's view. */ public ImageView getChevronView() { return mChevronView; } /** * Returns true if the TextView is in editing title or description, false otherwise. */ public boolean isInEditing() { return mInEditing; } /** * Returns true if the TextView is in editing description, false otherwise. */ public boolean isInEditingDescription() { return mInEditingDescription; } public View getEditingView() { if (mInEditing) { return mInEditingDescription ? mDescriptionView : mTitleView; } else { return null; } } } private static String TAG = "GuidedActionsStylist"; private View mMainView; private VerticalGridView mActionsGridView; private View mBgView; private View mSelectorView; private boolean mButtonActions; // Cached values from resources private float mEnabledTextAlpha; private float mDisabledTextAlpha; private float mEnabledDescriptionAlpha; private float mDisabledDescriptionAlpha; private float mEnabledChevronAlpha; private float mDisabledChevronAlpha; private int mTitleMinLines; private int mTitleMaxLines; private int mDescriptionMinLines; private int mVerticalPadding; private int mDisplayHeight; /** * Creates a view appropriate for displaying a list of GuidedActions, using the provided * inflater and container. *
* Note: Does not actually add the created view to the container; the caller should do
* this.
* @param inflater The layout inflater to be used when constructing the view.
* @param container The view group to be passed in the call to
* LayoutInflater.inflate.
* @return The view to be added to the caller's view hierarchy.
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container) {
mMainView = inflater.inflate(onProvideLayoutId(), container, false);
mSelectorView = mMainView.findViewById(R.id.guidedactions_selector);
mSelectorView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom,
int oldLeft, int oldTop, int oldRight, int oldBottom) {
final View focusedChild = mActionsGridView.getFocusedChild();
if (focusedChild != null && mSelectorView.getVisibility() == View.VISIBLE &&
mSelectorView.getHeight() > 0) {
mSelectorView.setScaleY((float) focusedChild.getHeight()
/ mSelectorView.getHeight());
}
}
});
mBgView = mMainView.findViewById(R.id.guided_button_actions_background);
if (mMainView instanceof VerticalGridView) {
mActionsGridView = (VerticalGridView) mMainView;
} else {
mActionsGridView = (VerticalGridView) mMainView.findViewById(R.id.guidedactions_list);
if (mActionsGridView == null) {
throw new IllegalStateException("No ListView exists.");
}
mActionsGridView.setWindowAlignmentOffset(0);
mActionsGridView.setWindowAlignmentOffsetPercent(50f);
mActionsGridView.setWindowAlignment(VerticalGridView.WINDOW_ALIGN_NO_EDGE);
if (mSelectorView != null) {
mActionsGridView.setOnScrollListener(new
SelectorAnimator(mSelectorView, mActionsGridView));
}
}
if (mSelectorView != null) {
// ALlow focus to move to other views
mActionsGridView.getViewTreeObserver().addOnGlobalFocusChangeListener(
mGlobalFocusChangeListener);
}
// Cache widths, chevron alpha values, max and min text lines, etc
Context ctx = mMainView.getContext();
TypedValue val = new TypedValue();
mEnabledChevronAlpha = getFloat(ctx, val, R.attr.guidedActionEnabledChevronAlpha);
mDisabledChevronAlpha = getFloat(ctx, val, R.attr.guidedActionDisabledChevronAlpha);
mTitleMinLines = getInteger(ctx, val, R.attr.guidedActionTitleMinLines);
mTitleMaxLines = getInteger(ctx, val, R.attr.guidedActionTitleMaxLines);
mDescriptionMinLines = getInteger(ctx, val, R.attr.guidedActionDescriptionMinLines);
mVerticalPadding = getDimension(ctx, val, R.attr.guidedActionVerticalPadding);
mDisplayHeight = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE))
.getDefaultDisplay().getHeight();
mEnabledTextAlpha = Float.valueOf(ctx.getResources().getString(R.string
.lb_guidedactions_item_unselected_text_alpha));
mDisabledTextAlpha = Float.valueOf(ctx.getResources().getString(R.string
.lb_guidedactions_item_disabled_text_alpha));
mEnabledDescriptionAlpha = Float.valueOf(ctx.getResources().getString(R.string
.lb_guidedactions_item_unselected_description_text_alpha));
mDisabledDescriptionAlpha = Float.valueOf(ctx.getResources().getString(R.string
.lb_guidedactions_item_disabled_description_text_alpha));
return mMainView;
}
/**
* Default implementation turns on background for actions and applies different Ids to views so
* that GuidedStepFragment could run transitions against two action lists. The method is called
* by GuidedStepFragment, app may override this function when replacing default layout file
* provided by {@link #onProvideLayoutId()}
*/
public void setAsButtonActions() {
mButtonActions = true;
mMainView.setId(R.id.guidedactions_root2);
ViewCompat.setTransitionName(mMainView, "guidedactions_root");
mActionsGridView.setId(R.id.guidedactions_list2);
mSelectorView.setId(R.id.guidedactions_selector2);
ViewCompat.setTransitionName(mSelectorView, "guidedactions_selector2");
mBgView.setId(R.id.guided_button_actions_background2);
ViewCompat.setTransitionName(mBgView, "guided_button_actions_background2");
mBgView.setVisibility(View.VISIBLE);
}
/**
* Returns true if {@link #setAsButtonActions()} was called, false otherwise.
* @return True if {@link #setAsButtonActions()} was called, false otherwise.
*/
public boolean isButtonActions() {
return mButtonActions;
}
final ViewTreeObserver.OnGlobalFocusChangeListener mGlobalFocusChangeListener =
new ViewTreeObserver.OnGlobalFocusChangeListener() {
private boolean mChildFocused;
@Override
public void onGlobalFocusChanged(View oldFocus, View newFocus) {
final View focusedChild = mActionsGridView.getFocusedChild();
if (focusedChild == null) {
mSelectorView.setVisibility(View.INVISIBLE);
mChildFocused = false;
} else if (!mChildFocused) {
mChildFocused = true;
mSelectorView.setVisibility(View.VISIBLE);
if (mSelectorView.getHeight() > 0) {
mSelectorView.setScaleY((float) focusedChild.getHeight()
/ mSelectorView.getHeight());
}
}
}
};
/**
* Called when destroy the View created by GuidedActionsStylist.
*/
public void onDestroyView() {
if (mSelectorView != null) {
mActionsGridView.getViewTreeObserver().removeOnGlobalFocusChangeListener(
mGlobalFocusChangeListener);
}
mActionsGridView = null;
mSelectorView = null;
mBgView = null;
mMainView = null;
}
/**
* Returns the VerticalGridView that displays the list of GuidedActions.
* @return The VerticalGridView for this presenter.
*/
public VerticalGridView getActionsGridView() {
return mActionsGridView;
}
/**
* Provides the resource ID of the layout defining the host view for the list of guided actions.
* Subclasses may override to provide their own customized layouts. The base implementation
* returns {@link android.support.v17.leanback.R.layout#lb_guidedactions}. If overridden, the
* substituted layout should contain matching IDs for any views that should be managed by the
* base class; this can be achieved by starting with a copy of the base layout file.
* @return The resource ID of the layout to be inflated to define the host view for the list
* of GuidedActions.
*/
public int onProvideLayoutId() {
return R.layout.lb_guidedactions;
}
/**
* Return view type of action, each different type can have differently associated layout Id.
* Default implementation returns {@link #VIEW_TYPE_DEFAULT}.
* @param action The action object.
* @return View type that used in {@link #onProvideItemLayoutId(int)}.
*/
public int getItemViewType(GuidedAction action) {
return VIEW_TYPE_DEFAULT;
}
/**
* Provides the resource ID of the layout defining the view for an individual guided actions.
* Subclasses may override to provide their own customized layouts. The base implementation
* returns {@link android.support.v17.leanback.R.layout#lb_guidedactions_item}. If overridden,
* the substituted layout should contain matching IDs for any views that should be managed by
* the base class; this can be achieved by starting with a copy of the base layout file. Note
* that in order for the item to support editing, the title view should both subclass {@link
* android.widget.EditText} and implement {@link ImeKeyMonitor}; see {@link
* GuidedActionEditText}. To support different types of Layouts, override {@link
* #onProvideItemLayoutId(int)}.
* @return The resource ID of the layout to be inflated to define the view to display an
* individual GuidedAction.
*/
public int onProvideItemLayoutId() {
return R.layout.lb_guidedactions_item;
}
/**
* Provides the resource ID of the layout defining the view for an individual guided actions.
* Subclasses may override to provide their own customized layouts. The base implementation
* returns {@link android.support.v17.leanback.R.layout#lb_guidedactions_item}. If overridden,
* the substituted layout should contain matching IDs for any views that should be managed by
* the base class; this can be achieved by starting with a copy of the base layout file. Note
* that in order for the item to support editing, the title view should both subclass {@link
* android.widget.EditText} and implement {@link ImeKeyMonitor}; see {@link
* GuidedActionEditText}.
* @param viewType View type returned by {@link #getItemViewType(GuidedAction)}
* @return The resource ID of the layout to be inflated to define the view to display an
* individual GuidedAction.
*/
public int onProvideItemLayoutId(int viewType) {
if (viewType == VIEW_TYPE_DEFAULT) {
return onProvideItemLayoutId();
} else {
throw new RuntimeException("ViewType " + viewType +
" not supported in GuidedActionsStylist");
}
}
/**
* Constructs a {@link ViewHolder} capable of representing {@link GuidedAction}s. Subclasses
* may choose to return a subclass of ViewHolder. To support different view types, override
* {@link #onCreateViewHolder(ViewGroup, int)}
*
* Note: Should not actually add the created view to the parent; the caller will do * this. * @param parent The view group to be used as the parent of the new view. * @return The view to be added to the caller's view hierarchy. */ public ViewHolder onCreateViewHolder(ViewGroup parent) { LayoutInflater inflater = LayoutInflater.from(parent.getContext()); View v = inflater.inflate(onProvideItemLayoutId(), parent, false); return new ViewHolder(v); } /** * Constructs a {@link ViewHolder} capable of representing {@link GuidedAction}s. Subclasses * may choose to return a subclass of ViewHolder. *
* Note: Should not actually add the created view to the parent; the caller will do
* this.
* @param parent The view group to be used as the parent of the new view.
* @param viewType The viewType returned by {@link #getItemViewType(GuidedAction)}
* @return The view to be added to the caller's view hierarchy.
*/
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == VIEW_TYPE_DEFAULT) {
return onCreateViewHolder(parent);
}
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(onProvideItemLayoutId(viewType), parent, false);
return new ViewHolder(v);
}
/**
* Binds a {@link ViewHolder} to a particular {@link GuidedAction}.
* @param vh The view holder to be associated with the given action.
* @param action The guided action to be displayed by the view holder's view.
* @return The view to be added to the caller's view hierarchy.
*/
public void onBindViewHolder(ViewHolder vh, GuidedAction action) {
if (vh.mTitleView != null) {
vh.mTitleView.setText(action.getTitle());
vh.mTitleView.setAlpha(action.isEnabled() ? mEnabledTextAlpha : mDisabledTextAlpha);
vh.mTitleView.setFocusable(action.isEditable());
}
if (vh.mDescriptionView != null) {
vh.mDescriptionView.setText(action.getDescription());
vh.mDescriptionView.setVisibility(TextUtils.isEmpty(action.getDescription()) ?
View.GONE : View.VISIBLE);
vh.mDescriptionView.setAlpha(action.isEnabled() ? mEnabledDescriptionAlpha :
mDisabledDescriptionAlpha);
vh.mDescriptionView.setFocusable(action.isDescriptionEditable());
}
// Clients might want the check mark view to be gone entirely, in which case, ignore it.
if (vh.mCheckmarkView != null) {
onBindCheckMarkView(vh, action);
}
if (vh.mChevronView != null) {
onBindChevronView(vh, action);
}
if (action.hasMultilineDescription()) {
if (vh.mTitleView != null) {
vh.mTitleView.setMaxLines(mTitleMaxLines);
if (vh.mDescriptionView != null) {
vh.mDescriptionView.setMaxHeight(getDescriptionMaxHeight(vh.view.getContext(),
vh.mTitleView));
}
}
} else {
if (vh.mTitleView != null) {
vh.mTitleView.setMaxLines(mTitleMinLines);
}
if (vh.mDescriptionView != null) {
vh.mDescriptionView.setMaxLines(mDescriptionMinLines);
}
}
setEditingMode(vh, action, false);
if (action.isFocusable()) {
vh.view.setFocusable(true);
if (vh.view instanceof ViewGroup) {
((ViewGroup) vh.view).setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
}
} else {
vh.view.setFocusable(false);
if (vh.view instanceof ViewGroup) {
((ViewGroup) vh.view).setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
}
}
}
public void setEditingMode(ViewHolder vh, GuidedAction action, boolean editing) {
if (editing != vh.mInEditing) {
vh.mInEditing = editing;
onEditingModeChange(vh, action, editing);
}
}
protected void onEditingModeChange(ViewHolder vh, GuidedAction action, boolean editing) {
TextView titleView = vh.getTitleView();
TextView descriptionView = vh.getDescriptionView();
if (editing) {
CharSequence editTitle = action.getEditTitle();
if (titleView != null && editTitle != null) {
titleView.setText(editTitle);
}
CharSequence editDescription = action.getEditDescription();
if (descriptionView != null && editDescription != null) {
descriptionView.setText(editDescription);
}
if (action.isDescriptionEditable()) {
if (descriptionView != null) {
descriptionView.setVisibility(View.VISIBLE);
descriptionView.setInputType(action.getDescriptionEditInputType());
}
vh.mInEditingDescription = true;
} else {
vh.mInEditingDescription = false;
if (titleView != null) {
titleView.setInputType(action.getEditInputType());
}
}
} else {
if (titleView != null) {
titleView.setText(action.getTitle());
}
if (descriptionView != null) {
descriptionView.setText(action.getDescription());
}
if (vh.mInEditingDescription) {
if (descriptionView != null) {
descriptionView.setVisibility(TextUtils.isEmpty(action.getDescription()) ?
View.GONE : View.VISIBLE);
descriptionView.setInputType(action.getDescriptionInputType());
}
vh.mInEditingDescription = false;
} else {
if (titleView != null) {
titleView.setInputType(action.getInputType());
}
}
}
}
/**
* Animates the view holder's view (or subviews thereof) when the action has had its focus
* state changed.
* @param vh The view holder associated with the relevant action.
* @param focused True if the action has become focused, false if it has lost focus.
*/
public void onAnimateItemFocused(ViewHolder vh, boolean focused) {
// No animations for this, currently, because the animation is done on
// mSelectorView
}
/**
* Animates the view holder's view (or subviews thereof) when the action has had its press
* state changed.
* @param vh The view holder associated with the relevant action.
* @param pressed True if the action has been pressed, false if it has been unpressed.
*/
public void onAnimateItemPressed(ViewHolder vh, boolean pressed) {
int attr = pressed ? R.attr.guidedActionPressedAnimation :
R.attr.guidedActionUnpressedAnimation;
createAnimator(vh.view, attr).start();
}
/**
* Resets the view holder's view to unpressed state.
* @param vh The view holder associated with the relevant action.
*/
public void onAnimateItemPressedCancelled(ViewHolder vh) {
createAnimator(vh.view, R.attr.guidedActionUnpressedAnimation).end();
}
/**
* Animates the view holder's view (or subviews thereof) when the action has had its check state
* changed. Default implementation calls setChecked() if {@link ViewHolder#getCheckmarkView()}
* is instance of {@link Checkable}.
*
* @param vh The view holder associated with the relevant action.
* @param checked True if the action has become checked, false if it has become unchecked.
* @see #onBindCheckMarkView(ViewHolder, GuidedAction)
*/
public void onAnimateItemChecked(ViewHolder vh, boolean checked) {
if (vh.mCheckmarkView instanceof Checkable) {
((Checkable) vh.mCheckmarkView).setChecked(checked);
}
}
/**
* Sets states of check mark view, called by {@link #onBindViewHolder(ViewHolder, GuidedAction)}
* when action's checkset Id is other than {@link GuidedAction#NO_CHECK_SET}. Default
* implementation assigns drawable loaded from theme attribute
* {@link android.R.attr#listChoiceIndicatorMultiple} for checkbox or
* {@link android.R.attr#listChoiceIndicatorSingle} for radio button. Subclass rarely needs
* override the method, instead app can provide its own drawable that supports transition
* animations, change theme attributes {@link android.R.attr#listChoiceIndicatorMultiple} and
* {@link android.R.attr#listChoiceIndicatorSingle} in {android.support.v17.leanback.R.
* styleable#LeanbackGuidedStepTheme}.
*
* @param vh The view holder associated with the relevant action.
* @param action The GuidedAction object to bind to.
* @see #onAnimateItemChecked(ViewHolder, boolean)
*/
public void onBindCheckMarkView(ViewHolder vh, GuidedAction action) {
if (action.getCheckSetId() != GuidedAction.NO_CHECK_SET) {
vh.mCheckmarkView.setVisibility(View.VISIBLE);
int attrId = action.getCheckSetId() == GuidedAction.CHECKBOX_CHECK_SET_ID ?
android.R.attr.listChoiceIndicatorMultiple :
android.R.attr.listChoiceIndicatorSingle;
final Context context = vh.mCheckmarkView.getContext();
Drawable drawable = null;
TypedValue typedValue = new TypedValue();
if (context.getTheme().resolveAttribute(attrId, typedValue, true)) {
drawable = ContextCompat.getDrawable(context, typedValue.resourceId);
}
vh.mCheckmarkView.setImageDrawable(drawable);
if (vh.mCheckmarkView instanceof Checkable) {
((Checkable) vh.mCheckmarkView).setChecked(action.isChecked());
}
} else {
vh.mCheckmarkView.setVisibility(View.GONE);
}
}
/**
* Sets states of chevron view, called by {@link #onBindViewHolder(ViewHolder, GuidedAction)}.
* Subclass may override.
*
* @param vh The view holder associated with the relevant action.
* @param action The GuidedAction object to bind to.
*/
public void onBindChevronView(ViewHolder vh, GuidedAction action) {
vh.mChevronView.setVisibility(action.hasNext() ? View.VISIBLE : View.GONE);
vh.mChevronView.setAlpha(action.isEnabled() ? mEnabledChevronAlpha :
mDisabledChevronAlpha);
}
/*
* ==========================================
* FragmentAnimationProvider overrides
* ==========================================
*/
/**
* {@inheritDoc}
*/
@Override
public void onImeAppearing(@NonNull List