co.lemnisk.app.android.carousel.Tricks

Class ViewPagerEx

java.lang.Object

android.view.View

android.view.ViewGroup

co.lemnisk.app.android.carousel.Tricks.ViewPagerEx

All Implemented Interfaces:

android.graphics.drawable.Drawable.Callback, android.view.accessibility.AccessibilityEventSource, android.view.KeyEvent.Callback, android.view.ViewManager, android.view.ViewParent

Direct Known Subclasses:

InfiniteViewPager

public class ViewPagerEx
extends android.view.ViewGroup

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ViewPagerEx.LayoutParams Layout parameters that should be supplied for views added to a ViewPager.
static interface	ViewPagerEx.OnPageChangeListener Callback interface for responding to changing state of the selected page.
static interface	ViewPagerEx.PageTransformer A PageTransformer is invoked whenever a visible/attached page is scrolled.
static class	ViewPagerEx.SavedState This is the persistent state that is saved by ViewPager.
static class	ViewPagerEx.SimpleOnPageChangeListener Simple implementation of the ViewPagerEx.OnPageChangeListener interface with stub implementations of each method.

Nested classes/interfaces inherited from class android.view.ViewGroup

android.view.ViewGroup.MarginLayoutParams, android.view.ViewGroup.OnHierarchyChangeListener

Nested classes/interfaces inherited from class android.view.View

android.view.View.AccessibilityDelegate, android.view.View.BaseSavedState, android.view.View.DragShadowBuilder, android.view.View.MeasureSpec, android.view.View.OnApplyWindowInsetsListener, android.view.View.OnAttachStateChangeListener, android.view.View.OnCapturedPointerListener, android.view.View.OnClickListener, android.view.View.OnContextClickListener, android.view.View.OnCreateContextMenuListener, android.view.View.OnDragListener, android.view.View.OnFocusChangeListener, android.view.View.OnGenericMotionListener, android.view.View.OnHoverListener, android.view.View.OnKeyListener, android.view.View.OnLayoutChangeListener, android.view.View.OnLongClickListener, android.view.View.OnScrollChangeListener, android.view.View.OnSystemUiVisibilityChangeListener, android.view.View.OnTouchListener, android.view.View.OnUnhandledKeyEventListener

Field Summary

Fields

Modifier and Type	Field and Description
static int	SCROLL_STATE_DRAGGING Indicates that the pager is currently being dragged by the user.
static int	SCROLL_STATE_IDLE Indicates that the pager is in an idle, settled state.
static int	SCROLL_STATE_SETTLING Indicates that the pager is in the process of settling to a final position.

Fields inherited from class android.view.ViewGroup

CLIP_TO_PADDING_MASK, FOCUS_AFTER_DESCENDANTS, FOCUS_BEFORE_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS, LAYOUT_MODE_CLIP_BOUNDS, LAYOUT_MODE_OPTICAL_BOUNDS, PERSISTENT_ALL_CACHES, PERSISTENT_ANIMATION_CACHE, PERSISTENT_NO_CACHE, PERSISTENT_SCROLLING_CACHE

Fields inherited from class android.view.View

ACCESSIBILITY_LIVE_REGION_ASSERTIVE, ACCESSIBILITY_LIVE_REGION_NONE, ACCESSIBILITY_LIVE_REGION_POLITE, ALPHA, AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR, AUTOFILL_HINT_CREDIT_CARD_NUMBER, AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE, AUTOFILL_HINT_EMAIL_ADDRESS, AUTOFILL_HINT_NAME, AUTOFILL_HINT_PASSWORD, AUTOFILL_HINT_PHONE, AUTOFILL_HINT_POSTAL_ADDRESS, AUTOFILL_HINT_POSTAL_CODE, AUTOFILL_HINT_USERNAME, AUTOFILL_TYPE_DATE, AUTOFILL_TYPE_LIST, AUTOFILL_TYPE_NONE, AUTOFILL_TYPE_TEXT, AUTOFILL_TYPE_TOGGLE, DRAG_FLAG_GLOBAL, DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION, DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION, DRAG_FLAG_GLOBAL_URI_READ, DRAG_FLAG_GLOBAL_URI_WRITE, DRAG_FLAG_OPAQUE, DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_LOW, EMPTY_STATE_SET, ENABLED_FOCUSED_SELECTED_STATE_SET, ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_FOCUSED_STATE_SET, ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, ENABLED_SELECTED_STATE_SET, ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_STATE_SET, ENABLED_WINDOW_FOCUSED_STATE_SET, FIND_VIEWS_WITH_CONTENT_DESCRIPTION, FIND_VIEWS_WITH_TEXT, FOCUS_BACKWARD, FOCUS_DOWN, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_UP, FOCUSABLE, FOCUSABLE_AUTO, FOCUSABLES_ALL, FOCUSABLES_TOUCH_MODE, FOCUSED_SELECTED_STATE_SET, FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, FOCUSED_STATE_SET, FOCUSED_WINDOW_FOCUSED_STATE_SET, GONE, HAPTIC_FEEDBACK_ENABLED, IMPORTANT_FOR_ACCESSIBILITY_AUTO, IMPORTANT_FOR_ACCESSIBILITY_NO, IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, IMPORTANT_FOR_ACCESSIBILITY_YES, IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, IMPORTANT_FOR_CONTENT_CAPTURE_AUTO, IMPORTANT_FOR_CONTENT_CAPTURE_NO, IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS, IMPORTANT_FOR_CONTENT_CAPTURE_YES, IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS, INVISIBLE, KEEP_SCREEN_ON, LAYER_TYPE_HARDWARE, LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE, LAYOUT_DIRECTION_INHERIT, LAYOUT_DIRECTION_LOCALE, LAYOUT_DIRECTION_LTR, LAYOUT_DIRECTION_RTL, MEASURED_HEIGHT_STATE_SHIFT, MEASURED_SIZE_MASK, MEASURED_STATE_MASK, MEASURED_STATE_TOO_SMALL, NO_ID, NOT_FOCUSABLE, OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS, OVER_SCROLL_NEVER, PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_SELECTED_STATE_SET, PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_STATE_SET, PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_SELECTED_STATE_SET, PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_STATE_SET, PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_SELECTED_STATE_SET, PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_STATE_SET, PRESSED_WINDOW_FOCUSED_STATE_SET, ROTATION, ROTATION_X, ROTATION_Y, SCALE_X, SCALE_Y, SCREEN_STATE_OFF, SCREEN_STATE_ON, SCROLL_AXIS_HORIZONTAL, SCROLL_AXIS_NONE, SCROLL_AXIS_VERTICAL, SCROLL_INDICATOR_BOTTOM, SCROLL_INDICATOR_END, SCROLL_INDICATOR_LEFT, SCROLL_INDICATOR_RIGHT, SCROLL_INDICATOR_START, SCROLL_INDICATOR_TOP, SCROLLBAR_POSITION_DEFAULT, SCROLLBAR_POSITION_LEFT, SCROLLBAR_POSITION_RIGHT, SCROLLBARS_INSIDE_INSET, SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_OUTSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, SELECTED_STATE_SET, SELECTED_WINDOW_FOCUSED_STATE_SET, SOUND_EFFECTS_ENABLED, STATUS_BAR_HIDDEN, STATUS_BAR_VISIBLE, SYSTEM_UI_FLAG_FULLSCREEN, SYSTEM_UI_FLAG_HIDE_NAVIGATION, SYSTEM_UI_FLAG_IMMERSIVE, SYSTEM_UI_FLAG_IMMERSIVE_STICKY, SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN, SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_STABLE, SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR, SYSTEM_UI_FLAG_LIGHT_STATUS_BAR, SYSTEM_UI_FLAG_LOW_PROFILE, SYSTEM_UI_FLAG_VISIBLE, SYSTEM_UI_LAYOUT_FLAGS, TEXT_ALIGNMENT_CENTER, TEXT_ALIGNMENT_GRAVITY, TEXT_ALIGNMENT_INHERIT, TEXT_ALIGNMENT_TEXT_END, TEXT_ALIGNMENT_TEXT_START, TEXT_ALIGNMENT_VIEW_END, TEXT_ALIGNMENT_VIEW_START, TEXT_DIRECTION_ANY_RTL, TEXT_DIRECTION_FIRST_STRONG, TEXT_DIRECTION_FIRST_STRONG_LTR, TEXT_DIRECTION_FIRST_STRONG_RTL, TEXT_DIRECTION_INHERIT, TEXT_DIRECTION_LOCALE, TEXT_DIRECTION_LTR, TEXT_DIRECTION_RTL, TRANSLATION_X, TRANSLATION_Y, TRANSLATION_Z, VIEW_LOG_TAG, VISIBLE, WINDOW_FOCUSED_STATE_SET, X, Y, Z

Constructor Summary

Constructors

Constructor and Description
ViewPagerEx(android.content.Context context)
ViewPagerEx(android.content.Context context, android.util.AttributeSet attrs)

Method Summary

Modifier and Type	Method and Description
void	addFocusables(java.util.ArrayList<android.view.View> views, int direction, int focusableMode) We only want the current page that is being shown to be focusable.
void	addOnPageChangeListener(ViewPagerEx.OnPageChangeListener listener) Add a listener that will be invoked whenever the page changes or is incrementally scrolled.
void	addTouchables(java.util.ArrayList<android.view.View> views) We only want the current page that is being shown to be touchable.
void	addView(android.view.View child, int index, android.view.ViewGroup.LayoutParams params)
boolean	arrowScroll(int direction)
boolean	beginFakeDrag() Start a fake drag of the pager.
protected boolean	canScroll(android.view.View v, boolean checkV, int dx, int x, int y) Tests scrollability within child views of v given a delta of dx.
boolean	canScrollHorizontally(int direction)
protected boolean	checkLayoutParams(android.view.ViewGroup.LayoutParams p)
void	computeScroll()
boolean	dispatchKeyEvent(android.view.KeyEvent event)
boolean	dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent event)
void	draw(android.graphics.Canvas canvas)
protected void	drawableStateChanged()
void	endFakeDrag() End a fake drag of the pager.
boolean	executeKeyEvent(android.view.KeyEvent event) You can call this function yourself to have the scroll view perform scrolling from a key event, just as if the event had been dispatched to it by the view hierarchy.
void	fakeDragBy(float xOffset) Fake drag by an offset in pixels.
protected android.view.ViewGroup.LayoutParams	generateDefaultLayoutParams()
android.view.ViewGroup.LayoutParams	generateLayoutParams(android.util.AttributeSet attrs)
protected android.view.ViewGroup.LayoutParams	generateLayoutParams(android.view.ViewGroup.LayoutParams p)
androidx.viewpager.widget.PagerAdapter	getAdapter() Retrieve the current adapter supplying pages.
protected int	getChildDrawingOrder(int childCount, int i)
int	getCurrentItem()
int	getOffscreenPageLimit() Returns the number of pages that will be retained to either side of the current page in the view hierarchy in an idle state.
int	getPageMargin() Return the margin between pages.
boolean	isFakeDragging() Returns true if a fake drag is in progress.
protected void	onAttachedToWindow()
protected void	onDetachedFromWindow()
protected void	onDraw(android.graphics.Canvas canvas)
boolean	onInterceptTouchEvent(android.view.MotionEvent ev)
protected void	onLayout(boolean changed, int l, int t, int r, int b)
protected void	onMeasure(int widthMeasureSpec, int heightMeasureSpec)
protected void	onPageScrolled(int position, float offset, int offsetPixels) This method will be invoked when the current page is scrolled, either as part of a programmatically initiated smooth scroll or a user initiated touch scroll.
protected boolean	onRequestFocusInDescendants(int direction, android.graphics.Rect previouslyFocusedRect) We only want the current page that is being shown to be focusable.
void	onRestoreInstanceState(android.os.Parcelable state)
android.os.Parcelable	onSaveInstanceState()
protected void	onSizeChanged(int w, int h, int oldw, int oldh)
boolean	onTouchEvent(android.view.MotionEvent ev)
void	removeOnPageChangeListener(ViewPagerEx.OnPageChangeListener listener) Remove a listener that was added with addOnPageChangeListener See ViewPagerEx.OnPageChangeListener.
void	removeView(android.view.View view)
void	setAdapter(androidx.viewpager.widget.PagerAdapter adapter) Set a PagerAdapter that will supply views for this pager as needed.
void	setCurrentItem(int item) Set the currently selected page.
void	setCurrentItem(int item, boolean smoothScroll) Set the currently selected page.
void	setOffscreenPageLimit(int limit) Set the number of pages that should be retained to either side of the current page in the view hierarchy in an idle state.
void	setPageMargin(int marginPixels) Set the margin between pages.
void	setPageMarginDrawable(android.graphics.drawable.Drawable d) Set a drawable that will be used to fill the margin between pages.
void	setPageMarginDrawable(int resId) Set a drawable that will be used to fill the margin between pages.
void	setPageTransformer(boolean reverseDrawingOrder, ViewPagerEx.PageTransformer transformer) Set a ViewPagerEx.PageTransformer that will be called for each attached page whenever the scroll position is changed.
protected boolean	verifyDrawable(android.graphics.drawable.Drawable who)

Methods inherited from class android.view.ViewGroup

addChildrenForAccessibility, addExtraDataToAccessibilityNodeInfo, addKeyboardNavigationClusters, addStatesFromChildren, addView, addView, addView, addView, addViewInLayout, addViewInLayout, attachLayoutAnimationParameters, attachViewToParent, bringChildToFront, canAnimate, childDrawableStateChanged, childHasTransientStateChanged, cleanupLayoutState, clearChildFocus, clearDisappearingChildren, clearFocus, debug, detachAllViewsFromParent, detachViewFromParent, detachViewFromParent, detachViewsFromParent, dispatchApplyWindowInsets, dispatchCapturedPointerEvent, dispatchConfigurationChanged, dispatchDisplayHint, dispatchDragEvent, dispatchDraw, dispatchDrawableHotspotChanged, dispatchFinishTemporaryDetach, dispatchFreezeSelfOnly, dispatchGenericFocusedEvent, dispatchGenericPointerEvent, dispatchHoverEvent, dispatchKeyEventPreIme, dispatchKeyShortcutEvent, dispatchPointerCaptureChanged, dispatchProvideAutofillStructure, dispatchProvideStructure, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchSetActivated, dispatchSetPressed, dispatchSetSelected, dispatchStartTemporaryDetach, dispatchSystemUiVisibilityChanged, dispatchThawSelfOnly, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchVisibilityChanged, dispatchWindowFocusChanged, dispatchWindowInsetsAnimationEnd, dispatchWindowInsetsAnimationPrepare, dispatchWindowInsetsAnimationProgress, dispatchWindowInsetsAnimationStart, dispatchWindowSystemUiVisiblityChanged, dispatchWindowVisibilityChanged, drawChild, endViewTransition, findFocus, findViewsWithText, focusableViewAvailable, focusSearch, gatherTransparentRegion, getAccessibilityClassName, getChildAt, getChildCount, getChildDrawingOrder, getChildMeasureSpec, getChildStaticTransformation, getChildVisibleRect, getClipChildren, getClipToPadding, getDescendantFocusability, getFocusedChild, getLayoutAnimation, getLayoutAnimationListener, getLayoutMode, getLayoutTransition, getNestedScrollAxes, getOverlay, getPersistentDrawingCache, getTouchscreenBlocksFocus, hasFocus, hasTransientState, indexOfChild, invalidateChild, invalidateChildInParent, isAlwaysDrawnWithCacheEnabled, isAnimationCacheEnabled, isChildrenDrawingOrderEnabled, isChildrenDrawnWithCacheEnabled, isLayoutSuppressed, isMotionEventSplittingEnabled, isTransitionGroup, jumpDrawablesToCurrentState, layout, measureChild, measureChildren, measureChildWithMargins, notifySubtreeAccessibilityStateChanged, offsetDescendantRectToMyCoords, offsetRectIntoDescendantCoords, onCreateDrawableState, onDescendantInvalidated, onInterceptHoverEvent, onNestedFling, onNestedPreFling, onNestedPrePerformAccessibilityAction, onNestedPreScroll, onNestedScroll, onNestedScrollAccepted, onRequestSendAccessibilityEvent, onResolvePointerIcon, onStartNestedScroll, onStopNestedScroll, onViewAdded, onViewRemoved, recomputeViewAttributes, removeAllViews, removeAllViewsInLayout, removeDetachedView, removeViewAt, removeViewInLayout, removeViews, removeViewsInLayout, requestChildFocus, requestChildRectangleOnScreen, requestDisallowInterceptTouchEvent, requestFocus, requestSendAccessibilityEvent, requestTransparentRegion, restoreDefaultFocus, scheduleLayoutAnimation, setAddStatesFromChildren, setAlwaysDrawnWithCacheEnabled, setAnimationCacheEnabled, setChildrenDrawingCacheEnabled, setChildrenDrawingOrderEnabled, setChildrenDrawnWithCacheEnabled, setClipChildren, setClipToPadding, setDescendantFocusability, setLayoutAnimation, setLayoutAnimationListener, setLayoutMode, setLayoutTransition, setMotionEventSplittingEnabled, setOnHierarchyChangeListener, setPersistentDrawingCache, setStaticTransformationsEnabled, setTouchscreenBlocksFocus, setTransitionGroup, setWindowInsetsAnimationCallback, shouldDelayChildPressedState, showContextMenuForChild, showContextMenuForChild, startActionModeForChild, startActionModeForChild, startLayoutAnimation, startViewTransition, suppressLayout, updateViewLayout

Methods inherited from class android.view.View

addFocusables, addOnAttachStateChangeListener, addOnLayoutChangeListener, addOnUnhandledKeyEventListener, animate, announceForAccessibility, autofill, autofill, awakenScrollBars, awakenScrollBars, awakenScrollBars, bringToFront, buildDrawingCache, buildDrawingCache, buildLayer, callOnClick, cancelDragAndDrop, cancelLongPress, cancelPendingInputEvents, canResolveLayoutDirection, canResolveTextAlignment, canResolveTextDirection, canScrollVertically, checkInputConnectionProxy, clearAnimation, combineMeasuredStates, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeSystemWindowInsets, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createAccessibilityNodeInfo, createContextMenu, destroyDrawingCache, dispatchGenericMotionEvent, dispatchNestedFling, dispatchNestedPreFling, dispatchNestedPrePerformAccessibilityAction, dispatchNestedPreScroll, dispatchNestedScroll, drawableHotspotChanged, findViewById, findViewWithTag, fitSystemWindows, focusSearch, forceHasOverlappingRendering, forceLayout, generateViewId, getAccessibilityDelegate, getAccessibilityLiveRegion, getAccessibilityNodeProvider, getAccessibilityPaneTitle, getAccessibilityTraversalAfter, getAccessibilityTraversalBefore, getAlpha, getAnimation, getAnimationMatrix, getApplicationWindowToken, getAttributeResolutionStack, getAttributeSourceResourceMap, getAutofillHints, getAutofillId, getAutofillType, getAutofillValue, getBackground, getBackgroundTintBlendMode, getBackgroundTintList, getBackgroundTintMode, getBaseline, getBottom, getBottomFadingEdgeStrength, getBottomPaddingOffset, getCameraDistance, getClipBounds, getClipBounds, getClipToOutline, getContentCaptureSession, getContentDescription, getContext, getContextMenuInfo, getDefaultFocusHighlightEnabled, getDefaultSize, getDisplay, getDrawableState, getDrawingCache, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getElevation, getExplicitStyle, getFilterTouchesWhenObscured, getFitsSystemWindows, getFocusable, getFocusables, getFocusedRect, getForeground, getForegroundGravity, getForegroundTintBlendMode, getForegroundTintList, getForegroundTintMode, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHasOverlappingRendering, getHeight, getHitRect, getHorizontalFadingEdgeLength, getHorizontalScrollbarHeight, getHorizontalScrollbarThumbDrawable, getHorizontalScrollbarTrackDrawable, getId, getImportantForAccessibility, getImportantForAutofill, getImportantForContentCapture, getKeepScreenOn, getKeyDispatcherState, getLabelFor, getLayerType, getLayoutDirection, getLayoutParams, getLeft, getLeftFadingEdgeStrength, getLeftPaddingOffset, getLocalVisibleRect, getLocationInSurface, getLocationInWindow, getLocationOnScreen, getMatrix, getMeasuredHeight, getMeasuredHeightAndState, getMeasuredState, getMeasuredWidth, getMeasuredWidthAndState, getMinimumHeight, getMinimumWidth, getNextClusterForwardId, getNextFocusDownId, getNextFocusForwardId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getOutlineAmbientShadowColor, getOutlineProvider, getOutlineSpotShadowColor, getOverScrollMode, getPaddingBottom, getPaddingEnd, getPaddingLeft, getPaddingRight, getPaddingStart, getPaddingTop, getParent, getParentForAccessibility, getPivotX, getPivotY, getPointerIcon, getResources, getRevealOnFocusHint, getRight, getRightFadingEdgeStrength, getRightPaddingOffset, getRootView, getRootWindowInsets, getRotation, getRotationX, getRotationY, getScaleX, getScaleY, getScrollBarDefaultDelayBeforeFade, getScrollBarFadeDuration, getScrollBarSize, getScrollBarStyle, getScrollIndicators, getScrollX, getScrollY, getSolidColor, getSourceLayoutResId, getStateDescription, getStateListAnimator, getSuggestedMinimumHeight, getSuggestedMinimumWidth, getSystemGestureExclusionRects, getSystemUiVisibility, getTag, getTag, getTextAlignment, getTextDirection, getTooltipText, getTop, getTopFadingEdgeStrength, getTopPaddingOffset, getTouchables, getTouchDelegate, getTransitionAlpha, getTransitionName, getTranslationX, getTranslationY, getTranslationZ, getUniqueDrawingId, getVerticalFadingEdgeLength, getVerticalScrollbarPosition, getVerticalScrollbarThumbDrawable, getVerticalScrollbarTrackDrawable, getVerticalScrollbarWidth, getViewTreeObserver, getVisibility, getWidth, getWindowAttachCount, getWindowId, getWindowInsetsController, getWindowSystemUiVisibility, getWindowToken, getWindowVisibility, getWindowVisibleDisplayFrame, getX, getY, getZ, hasExplicitFocusable, hasFocusable, hasNestedScrollingParent, hasOnClickListeners, hasOnLongClickListeners, hasOverlappingRendering, hasPointerCapture, hasWindowFocus, inflate, invalidate, invalidate, invalidate, invalidateDrawable, invalidateOutline, isAccessibilityFocused, isAccessibilityHeading, isActivated, isAttachedToWindow, isClickable, isContextClickable, isDirty, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isFocusedByDefault, isForceDarkAllowed, isHapticFeedbackEnabled, isHardwareAccelerated, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isHovered, isImportantForAccessibility, isImportantForAutofill, isImportantForContentCapture, isInEditMode, isInLayout, isInTouchMode, isKeyboardNavigationCluster, isLaidOut, isLayoutDirectionResolved, isLayoutRequested, isLongClickable, isNestedScrollingEnabled, isOpaque, isPaddingOffsetRequired, isPaddingRelative, isPivotSet, isPressed, isSaveEnabled, isSaveFromParentEnabled, isScreenReaderFocusable, isScrollbarFadingEnabled, isScrollContainer, isSelected, isShowingLayoutBounds, isShown, isSoundEffectsEnabled, isTemporarilyDetached, isTextAlignmentResolved, isTextDirectionResolved, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, isVisibleToUserForAutofill, keyboardNavigationClusterSearch, measure, mergeDrawableStates, offsetLeftAndRight, offsetTopAndBottom, onAnimationEnd, onAnimationStart, onApplyWindowInsets, onCancelPendingInputEvents, onCapturedPointerEvent, onCheckIsTextEditor, onConfigurationChanged, onCreateContextMenu, onCreateInputConnection, onDisplayHint, onDragEvent, onDrawForeground, onDrawScrollBars, onFilterTouchEventForSecurity, onFinishInflate, onFinishTemporaryDetach, onFocusChanged, onGenericMotionEvent, onHoverChanged, onHoverEvent, onInitializeAccessibilityEvent, onInitializeAccessibilityNodeInfo, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyPreIme, onKeyShortcut, onKeyUp, onOverScrolled, onPointerCaptureChange, onPopulateAccessibilityEvent, onProvideAutofillStructure, onProvideAutofillVirtualStructure, onProvideContentCaptureStructure, onProvideStructure, onProvideVirtualStructure, onRtlPropertiesChanged, onScreenStateChanged, onScrollChanged, onSetAlpha, onStartTemporaryDetach, onTrackballEvent, onVisibilityAggregated, onVisibilityChanged, onWindowFocusChanged, onWindowSystemUiVisibilityChanged, onWindowVisibilityChanged, overScrollBy, performAccessibilityAction, performClick, performContextClick, performContextClick, performHapticFeedback, performHapticFeedback, performLongClick, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, postInvalidateOnAnimation, postInvalidateOnAnimation, postOnAnimation, postOnAnimationDelayed, refreshDrawableState, releasePointerCapture, removeCallbacks, removeOnAttachStateChangeListener, removeOnLayoutChangeListener, removeOnUnhandledKeyEventListener, requestApplyInsets, requestFitSystemWindows, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestPointerCapture, requestRectangleOnScreen, requestRectangleOnScreen, requestUnbufferedDispatch, requestUnbufferedDispatch, requireViewById, resetPivot, resolveSize, resolveSizeAndState, restoreHierarchyState, saveAttributeDataForStyleable, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, sendAccessibilityEvent, sendAccessibilityEventUnchecked, setAccessibilityDelegate, setAccessibilityHeading, setAccessibilityLiveRegion, setAccessibilityPaneTitle, setAccessibilityTraversalAfter, setAccessibilityTraversalBefore, setActivated, setAlpha, setAnimation, setAnimationMatrix, setAutofillHints, setAutofillId, setBackground, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setBackgroundTintBlendMode, setBackgroundTintList, setBackgroundTintMode, setBottom, setCameraDistance, setClickable, setClipBounds, setClipToOutline, setContentCaptureSession, setContentDescription, setContextClickable, setDefaultFocusHighlightEnabled, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setElevation, setEnabled, setFadingEdgeLength, setFilterTouchesWhenObscured, setFitsSystemWindows, setFocusable, setFocusable, setFocusableInTouchMode, setFocusedByDefault, setForceDarkAllowed, setForeground, setForegroundGravity, setForegroundTintBlendMode, setForegroundTintList, setForegroundTintMode, setHapticFeedbackEnabled, setHasTransientState, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setHorizontalScrollbarThumbDrawable, setHorizontalScrollbarTrackDrawable, setHovered, setId, setImportantForAccessibility, setImportantForAutofill, setImportantForContentCapture, setKeepScreenOn, setKeyboardNavigationCluster, setLabelFor, setLayerPaint, setLayerType, setLayoutDirection, setLayoutParams, setLeft, setLeftTopRightBottom, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNestedScrollingEnabled, setNextClusterForwardId, setNextFocusDownId, setNextFocusForwardId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnApplyWindowInsetsListener, setOnCapturedPointerListener, setOnClickListener, setOnContextClickListener, setOnCreateContextMenuListener, setOnDragListener, setOnFocusChangeListener, setOnGenericMotionListener, setOnHoverListener, setOnKeyListener, setOnLongClickListener, setOnScrollChangeListener, setOnSystemUiVisibilityChangeListener, setOnTouchListener, setOutlineAmbientShadowColor, setOutlineProvider, setOutlineSpotShadowColor, setOverScrollMode, setPadding, setPaddingRelative, setPivotX, setPivotY, setPointerIcon, setPressed, setRevealOnFocusHint, setRight, setRotation, setRotationX, setRotationY, setSaveEnabled, setSaveFromParentEnabled, setScaleX, setScaleY, setScreenReaderFocusable, setScrollBarDefaultDelayBeforeFade, setScrollBarFadeDuration, setScrollbarFadingEnabled, setScrollBarSize, setScrollBarStyle, setScrollContainer, setScrollIndicators, setScrollIndicators, setScrollX, setScrollY, setSelected, setSoundEffectsEnabled, setStateDescription, setStateListAnimator, setSystemGestureExclusionRects, setSystemUiVisibility, setTag, setTag, setTextAlignment, setTextDirection, setTooltipText, setTop, setTouchDelegate, setTransitionAlpha, setTransitionName, setTransitionVisibility, setTranslationX, setTranslationY, setTranslationZ, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVerticalScrollbarPosition, setVerticalScrollbarThumbDrawable, setVerticalScrollbarTrackDrawable, setVisibility, setWillNotCacheDrawing, setWillNotDraw, setX, setY, setZ, showContextMenu, showContextMenu, startActionMode, startActionMode, startAnimation, startDrag, startDragAndDrop, startNestedScroll, stopNestedScroll, toString, transformMatrixToGlobal, transformMatrixToLocal, unscheduleDrawable, unscheduleDrawable, updateDragShadow, willNotCacheDrawing, willNotDraw

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface android.view.ViewParent

canResolveLayoutDirection, canResolveTextAlignment, canResolveTextDirection, createContextMenu, getLayoutDirection, getParent, getParentForAccessibility, getTextAlignment, getTextDirection, isLayoutDirectionResolved, isLayoutRequested, isTextAlignmentResolved, isTextDirectionResolved, keyboardNavigationClusterSearch, requestFitSystemWindows, requestLayout

Field Detail

SCROLL_STATE_IDLE

public static final int SCROLL_STATE_IDLE

Indicates that the pager is in an idle, settled state. The current page is fully in view and no animation is in progress.

See Also:

Constant Field Values

SCROLL_STATE_DRAGGING

public static final int SCROLL_STATE_DRAGGING

Indicates that the pager is currently being dragged by the user.

See Also:

Constant Field Values

SCROLL_STATE_SETTLING

public static final int SCROLL_STATE_SETTLING

Indicates that the pager is in the process of settling to a final position.

See Also:

Constant Field Values

Constructor Detail

ViewPagerEx

public ViewPagerEx(android.content.Context context)

ViewPagerEx

public ViewPagerEx(android.content.Context context,
                   android.util.AttributeSet attrs)

Method Detail

onDetachedFromWindow

protected void onDetachedFromWindow()

Overrides:

onDetachedFromWindow in class android.view.ViewGroup

setAdapter

public void setAdapter(androidx.viewpager.widget.PagerAdapter adapter)

Set a PagerAdapter that will supply views for this pager as needed.

Parameters:

adapter - Adapter to use

getAdapter

public androidx.viewpager.widget.PagerAdapter getAdapter()

Retrieve the current adapter supplying pages.

Returns:

The currently registered PagerAdapter

setCurrentItem

public void setCurrentItem(int item)

Set the currently selected page. If the ViewPager has already been through its first layout with its current adapter there will be a smooth animated transition between the current item and the specified item.

Parameters:

item - Item index to select

setCurrentItem

public void setCurrentItem(int item,
                           boolean smoothScroll)

Set the currently selected page.

Parameters:

item - Item index to select

smoothScroll - True to smoothly scroll to the new item, false to transition immediately

getCurrentItem

public int getCurrentItem()

addOnPageChangeListener

public void addOnPageChangeListener(ViewPagerEx.OnPageChangeListener listener)

Add a listener that will be invoked whenever the page changes or is incrementally scrolled. See ViewPagerEx.OnPageChangeListener.

Parameters:

listener - Listener to add

removeOnPageChangeListener

public void removeOnPageChangeListener(ViewPagerEx.OnPageChangeListener listener)

Remove a listener that was added with addOnPageChangeListener See ViewPagerEx.OnPageChangeListener.

Parameters:

listener - Listener to remove

setPageTransformer

public void setPageTransformer(boolean reverseDrawingOrder,
                               ViewPagerEx.PageTransformer transformer)

Set a ViewPagerEx.PageTransformer that will be called for each attached page whenever the scroll position is changed. This allows the application to apply custom property transformations to each page, overriding the default sliding look and feel.

Note: Prior to Android 3.0 the property animation APIs did not exist. As a result, setting a PageTransformer prior to Android 3.0 (API 11) will have no effect.

Parameters:

reverseDrawingOrder - true if the supplied PageTransformer requires page views to be drawn from last to first instead of first to last.

transformer - PageTransformer that will modify each page's animation properties

getChildDrawingOrder

protected int getChildDrawingOrder(int childCount,
                                   int i)

Overrides:

getChildDrawingOrder in class android.view.ViewGroup

getOffscreenPageLimit

public int getOffscreenPageLimit()

Returns the number of pages that will be retained to either side of the current page in the view hierarchy in an idle state. Defaults to 1.

Returns:

How many pages will be kept offscreen on either side

See Also:

setOffscreenPageLimit(int)

setOffscreenPageLimit

public void setOffscreenPageLimit(int limit)

Set the number of pages that should be retained to either side of the current page in the view hierarchy in an idle state. Pages beyond this limit will be recreated from the adapter when needed.

This is offered as an optimization. If you know in advance the number of pages you will need to support or have lazy-loading mechanisms in place on your pages, tweaking this setting can have benefits in perceived smoothness of paging animations and interaction. If you have a small number of pages (3-4) that you can keep active all at once, less time will be spent in layout for newly created view subtrees as the user pages back and forth.

You should keep this limit low, especially if your pages have complex layouts. This setting defaults to 1.

Parameters:

limit - How many pages will be kept offscreen in an idle state.

setPageMargin

public void setPageMargin(int marginPixels)

Set the margin between pages.

Parameters:

marginPixels - Distance between adjacent pages in pixels

See Also:

getPageMargin(), setPageMarginDrawable(Drawable), setPageMarginDrawable(int)

getPageMargin

public int getPageMargin()

Return the margin between pages.

Returns:

The size of the margin in pixels

setPageMarginDrawable

public void setPageMarginDrawable(android.graphics.drawable.Drawable d)

Set a drawable that will be used to fill the margin between pages.

Parameters:

d - Drawable to display between pages

setPageMarginDrawable

public void setPageMarginDrawable(int resId)

Set a drawable that will be used to fill the margin between pages.

Parameters:

resId - Resource ID of a drawable to display between pages

verifyDrawable

protected boolean verifyDrawable(android.graphics.drawable.Drawable who)

Overrides:

verifyDrawable in class android.view.View

drawableStateChanged

protected void drawableStateChanged()

Overrides:

drawableStateChanged in class android.view.ViewGroup

onSaveInstanceState

public android.os.Parcelable onSaveInstanceState()

Overrides:

onSaveInstanceState in class android.view.View

onRestoreInstanceState

public void onRestoreInstanceState(android.os.Parcelable state)

Overrides:

onRestoreInstanceState in class android.view.View

addView

public void addView(android.view.View child,
                    int index,
                    android.view.ViewGroup.LayoutParams params)

Overrides:

addView in class android.view.ViewGroup

removeView

public void removeView(android.view.View view)

Specified by:

removeView in interface android.view.ViewManager

Overrides:

removeView in class android.view.ViewGroup

onAttachedToWindow

protected void onAttachedToWindow()

Overrides:

onAttachedToWindow in class android.view.ViewGroup

onMeasure

protected void onMeasure(int widthMeasureSpec,
                         int heightMeasureSpec)

Overrides:

onMeasure in class android.view.View

onSizeChanged

protected void onSizeChanged(int w,
                             int h,
                             int oldw,
                             int oldh)

Overrides:

onSizeChanged in class android.view.View

onLayout

protected void onLayout(boolean changed,
                        int l,
                        int t,
                        int r,
                        int b)

Specified by:

onLayout in class android.view.ViewGroup

computeScroll

public void computeScroll()

Overrides:

computeScroll in class android.view.View

onPageScrolled

protected void onPageScrolled(int position,
                              float offset,
                              int offsetPixels)

This method will be invoked when the current page is scrolled, either as part of a programmatically initiated smooth scroll or a user initiated touch scroll. If you override this method you must call through to the superclass implementation (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled returns.

Parameters:

position - Position index of the first page currently being displayed. Page position+1 will be visible if positionOffset is nonzero.

offset - Value from [0, 1) indicating the offset from the page at position.

offsetPixels - Value in pixels indicating the offset from position.

onInterceptTouchEvent

public boolean onInterceptTouchEvent(android.view.MotionEvent ev)

Overrides:

onInterceptTouchEvent in class android.view.ViewGroup

onTouchEvent

public boolean onTouchEvent(android.view.MotionEvent ev)

Overrides:

onTouchEvent in class android.view.View

draw

public void draw(android.graphics.Canvas canvas)

Overrides:

draw in class android.view.View

onDraw

protected void onDraw(android.graphics.Canvas canvas)

Overrides:

onDraw in class android.view.View

beginFakeDrag

public boolean beginFakeDrag()

Start a fake drag of the pager.

A fake drag can be useful if you want to synchronize the motion of the ViewPager with the touch scrolling of another view, while still letting the ViewPager control the snapping motion and fling behavior. (e.g. parallax-scrolling tabs.) Call fakeDragBy(float) to simulate the actual drag motion. Call endFakeDrag() to complete the fake drag and fling as necessary.

During a fake drag the ViewPager will ignore all touch events. If a real drag is already in progress, this method will return false.

Returns:

true if the fake drag began successfully, false if it could not be started.

See Also:

fakeDragBy(float), endFakeDrag()

endFakeDrag

public void endFakeDrag()

End a fake drag of the pager.

See Also:

beginFakeDrag(), fakeDragBy(float)

fakeDragBy

public void fakeDragBy(float xOffset)

Fake drag by an offset in pixels. You must have called beginFakeDrag() first.

Parameters:

xOffset - Offset in pixels to drag by.

See Also:

beginFakeDrag(), endFakeDrag()

isFakeDragging

public boolean isFakeDragging()

Returns true if a fake drag is in progress.

Returns:

true if currently in a fake drag, false otherwise.

See Also:

beginFakeDrag(), fakeDragBy(float), endFakeDrag()

canScrollHorizontally

public boolean canScrollHorizontally(int direction)

Overrides:

canScrollHorizontally in class android.view.View

canScroll

protected boolean canScroll(android.view.View v,
                            boolean checkV,
                            int dx,
                            int x,
                            int y)

Tests scrollability within child views of v given a delta of dx.

Parameters:

v - View to test for horizontal scrollability

checkV - Whether the view v passed should itself be checked for scrollability (true), or just its children (false).

dx - Delta scrolled in pixels

x - X coordinate of the active touch point

y - Y coordinate of the active touch point

Returns:

true if child views of v can be scrolled by delta of dx.

dispatchKeyEvent

public boolean dispatchKeyEvent(android.view.KeyEvent event)

Overrides:

dispatchKeyEvent in class android.view.ViewGroup

executeKeyEvent

public boolean executeKeyEvent(android.view.KeyEvent event)

You can call this function yourself to have the scroll view perform scrolling from a key event, just as if the event had been dispatched to it by the view hierarchy.

Parameters:

event - The key event to execute.

Returns:

Return true if the event was handled, else false.

arrowScroll

public boolean arrowScroll(int direction)

addFocusables

public void addFocusables(java.util.ArrayList<android.view.View> views,
                          int direction,
                          int focusableMode)

We only want the current page that is being shown to be focusable.

Overrides:

addFocusables in class android.view.ViewGroup

addTouchables

public void addTouchables(java.util.ArrayList<android.view.View> views)

We only want the current page that is being shown to be touchable.

Overrides:

addTouchables in class android.view.ViewGroup

onRequestFocusInDescendants

protected boolean onRequestFocusInDescendants(int direction,
                                              android.graphics.Rect previouslyFocusedRect)

We only want the current page that is being shown to be focusable.

Overrides:

onRequestFocusInDescendants in class android.view.ViewGroup

dispatchPopulateAccessibilityEvent

public boolean dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent event)

Overrides:

dispatchPopulateAccessibilityEvent in class android.view.View

generateDefaultLayoutParams

protected android.view.ViewGroup.LayoutParams generateDefaultLayoutParams()

Overrides:

generateDefaultLayoutParams in class android.view.ViewGroup

generateLayoutParams

protected android.view.ViewGroup.LayoutParams generateLayoutParams(android.view.ViewGroup.LayoutParams p)

Overrides:

generateLayoutParams in class android.view.ViewGroup

checkLayoutParams

protected boolean checkLayoutParams(android.view.ViewGroup.LayoutParams p)

Overrides:

checkLayoutParams in class android.view.ViewGroup

generateLayoutParams

public android.view.ViewGroup.LayoutParams generateLayoutParams(android.util.AttributeSet attrs)

Overrides:

generateLayoutParams in class android.view.ViewGroup