class MotionHelper : ConstraintHelper, MotionHelperInterface

Known direct subclasses
Carousel

Carousel works within a MotionLayout to provide a simple recycler like pattern.

MotionEffect

MotionHelper that automatically inserts keyframes for views moving in a given direction, out of:


Summary

Public constructors

MotionHelper(context: Context!)
MotionHelper(context: Context!, attrs: AttributeSet!)
MotionHelper(context: Context!, attrs: AttributeSet!, defStyleAttr: Int)

Public functions

Float

get the progress

Boolean

is involved in painting

Boolean
Boolean
Unit

This is called after motionLayout read motionScene and assembles all constraintSets

Unit
onPostDraw(canvas: Canvas!)

Called after views are painted

Unit
onPreDraw(canvas: Canvas!)

Call before views are painted

Unit
onPreSetup(
    motionLayout: MotionLayout!,
    controllerMap: HashMap<View!, MotionController!>!
)

Called after motionController is populated with start and end and keyframes.

Unit
onTransitionChange(
    motionLayout: MotionLayout!,
    startId: Int,
    endId: Int,
    progress: Float
)

Called when a drawer's position changes.

Unit
onTransitionCompleted(motionLayout: MotionLayout!, currentId: Int)

Called when a drawer has settled completely a state.

Unit
onTransitionStarted(motionLayout: MotionLayout!, startId: Int, endId: Int)

Called when a drawer is about to start a transition.

Unit
onTransitionTrigger(
    motionLayout: MotionLayout!,
    triggerId: Int,
    positive: Boolean,
    progress: Float
)

Call when a trigger is fired

Unit
setProgress(progress: Float)

Set the progress

Unit
setProgress(view: View!, progress: Float)

Protected functions

Unit
init(attrs: AttributeSet!)

Protected properties

Array<View!>!

Inherited Constants

From androidx.constraintlayout.widget.ConstraintHelper
const String!
CHILD_TAG = "CONSTRAINT_LAYOUT_HELPER_CHILD"
From android.view.View
const Int
const Int
const Int
const Int
const Int
const Int
const Property<View!, Float!>!
const Int
const String!
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE = "creditCardExpirationDate"
const String!
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY = "creditCardExpirationDay"
const String!
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH = "creditCardExpirationMonth"
const String!
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR = "creditCardExpirationYear"
const String!
const String!
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE = "creditCardSecurityCode"
const String!
const String!
const String!
const String!
const String!
const String!
const String!
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const Int
const Int
const Int
const Int
const Int
const Int
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const Int
const Int
const Int
const Int
const Int
const Int
const Int
GONE = 8
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
KEEP_SCREEN_ON = 67108864
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
NO_ID = -1
const Int
const Int
const Int
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const IntArray<Int>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const IntArray<Int>!
const IntArray<Int>!
const Int
const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int

This property is deprecated.

const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Int
const Property<View!, Float!>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const String!
VIEW_LOG_TAG = "View"
const Int
const IntArray<Int>!
const Property<View!, Float!>!
const Property<View!, Float!>!
const Property<View!, Float!>!

Inherited functions

From androidx.constraintlayout.widget.ConstraintHelper
Unit
addView(view: View!)

Add a view to the helper.

Unit

hook for helpers to apply parameters in MotionLayout

Unit
Unit
Unit
Boolean

does id table contain the id

IntArray<Int>!

Helpers typically reference a collection of ids

Array<View!>!
Int

find the position of an id

java-static Boolean
Unit
loadParameters(
    constraint: ConstraintSet.Constraint!,
    child: HelperWidget!,
    layoutParams: ConstraintLayout.LayoutParams!,
    mapIdToWidget: SparseArray<ConstraintWidget!>!
)

Load the parameters

Unit
Unit
onDraw(canvas: Canvas)
Unit
onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int)
Int
removeView(view: View!)

Remove a given view from the helper.

Unit
resolveRtl(widget: ConstraintWidget!, isRtl: Boolean)

resolve the RTL

Unit
setIds(idList: String!)
Unit
Unit

Helpers typically reference a collection of ids

Unit
setTag(key: Int, tag: Any!)
Unit

update after constraints are resolved

Unit

Allows a helper a chance to update its internal object post layout or set up connections for the pointed elements

Unit
Unit

called before the draw

Unit

Allows a helper a chance to update its internal object pre layout or set up connections for the pointed elements

Unit
updatePreLayout(
    container: ConstraintWidgetContainer!,
    helper: Helper!,
    map: SparseArray<ConstraintWidget!>!
)

called before solver resolution

Unit

Allows a helper to replace the default ConstraintWidget in LayoutParams by its own subclass

From android.view.View
Unit
Unit
addExtraDataToAccessibilityNodeInfo(
    info: AccessibilityNodeInfo!,
    extraDataKey: String!,
    arguments: Bundle!
)
Unit
addFocusables(views: ArrayList<View!>!, direction: Int)
Unit
addKeyboardNavigationClusters(
    views: (Mutable)Collection<View!>!,
    direction: Int
)
Unit
Unit
Unit
Unit
ViewPropertyAnimator!
Unit
Unit
Boolean
Unit
Unit

This function is deprecated.

Unit
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Unit
Unit
Unit
Boolean
Unit
Unit
Unit
java-static Int
combineMeasuredStates(curState: Int, newState: Int)
Int
Int
Int
Unit
WindowInsets!
computeSystemWindowInsets(in: WindowInsets!, outLocalInsets: Rect!)
Int
Int
Int
AccessibilityNodeInfo!
Unit
Unit

This function is deprecated.

WindowInsets!
Boolean
Unit
Unit
dispatchCreateViewTranslationRequest(
    viewIds: (Mutable)Map<AutofillId!, LongArray!>!,
    supportedFormats: IntArray!,
    capability: TranslationCapability!,
    requests: (Mutable)List<ViewTranslationRequest!>!
)
Unit
Boolean
Unit
dispatchDraw(canvas: Canvas!)
Unit
Unit
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
dispatchNestedFling(velocityX: Float, velocityY: Float, consumed: Boolean)
Boolean
dispatchNestedPreFling(velocityX: Float, velocityY: Float)
Boolean
dispatchNestedPrePerformAccessibilityAction(
    action: Int,
    arguments: Bundle!
)
Boolean
dispatchNestedPreScroll(
    dx: Int,
    dy: Int,
    consumed: IntArray!,
    offsetInWindow: IntArray!
)
Boolean
dispatchNestedScroll(
    dxConsumed: Int,
    dyConsumed: Int,
    dxUnconsumed: Int,
    dyUnconsumed: Int,
    offsetInWindow: IntArray!
)
Unit
Boolean
Unit
Unit
Unit
Unit
Unit
dispatchScrollCaptureSearch(
    localVisibleRect: Rect!,
    windowOffset: Point!,
    targets: Consumer<ScrollCaptureTarget!>!
)
Unit
Unit
Unit
Unit
Unit

This function is deprecated.

Boolean
Boolean
Boolean
dispatchUnhandledMove(focused: View!, direction: Int)
Unit
dispatchVisibilityChanged(changedView: View!, visibility: Int)
Unit
Unit
Unit
WindowInsets!
dispatchWindowInsetsAnimationProgress(
    insets: WindowInsets!,
    runningAnimations: (Mutable)List<WindowInsetsAnimation!>!
)
WindowInsetsAnimation.Bounds!
Unit

This function is deprecated.

Unit
Unit
draw(canvas: Canvas!)
Unit
Unit
View!
OnBackInvokedDispatcher!
T!
<T : View?> findViewById(id: Int)
T!
<T : View?> findViewWithTag(tag: Any!)
Unit
findViewsWithText(
    outViews: ArrayList<View!>!,
    searched: CharSequence!,
    flags: Int
)
Boolean

This function is deprecated.

View!
focusSearch(direction: Int)
Unit
forceHasOverlappingRendering(hasOverlappingRendering: Boolean)
Unit
Boolean
Unit
generateDisplayHash(
    hashAlgorithm: String!,
    bounds: Rect!,
    executor: Executor!,
    callback: DisplayHashResultCallback!
)
java-static Int
CharSequence!
View.AccessibilityDelegate!
Int
AccessibilityNodeProvider!
CharSequence!
Int
Int
String!
String!
Float
Animation!
Matrix!
IBinder!
IntArray<Int>!
(Mutable)Map<Int!, Int!>!
Array<String!>!
AutofillId!
Int
AutofillValue!
Drawable!
BlendMode!
ColorStateList!
PorterDuff.Mode!
Int
Int
Float
Int
Float
Rect!
Boolean
getClipBounds(outRect: Rect!)
Boolean
ContentCaptureSession!
CharSequence!
Context!
ContextMenu.ContextMenuInfo!
Boolean
java-static Int
getDefaultSize(size: Int, measureSpec: Int)
Display!
IntArray<Int>!
Bitmap!

This function is deprecated.

Int

This function is deprecated.

Int

This function is deprecated.

Unit
getDrawingRect(outRect: Rect!)
Long
Float
Int
Boolean
Boolean
Int
ArrayList<View!>!
getFocusables(direction: Int)
Unit
Drawable!
Int
BlendMode!
ColorStateList!
PorterDuff.Mode!
Boolean
getGlobalVisibleRect(r: Rect!, globalOffset: Point!)
Handler!
Float
Float
Float
Float
Runnable!
Boolean
Int
Unit
getHitRect(outRect: Rect!)
Int
Int
Drawable!
Drawable!
Int
Int
Int
Int
Boolean
KeyEvent.DispatcherState!
Int
Int
Int
ViewGroup.LayoutParams!
Int
Float
Int
Boolean
Unit
Unit
Unit
Matrix!
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
View.OnFocusChangeListener!
Int
ViewOutlineProvider!
Int
Int
ViewOverlay!
Int
Int
Int
Int
Int
Int
ViewParent!
ViewParent!
Float
Float
PointerIcon!
(Mutable)List<Rect!>!
Array<String!>!
Resources!
Boolean
Int
Float
Int
AttachedSurfaceControl!
View!
WindowInsets!
Float
Float
Float
Float
Float
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
CharSequence!
StateListAnimator!
Int
Int
(Mutable)List<Rect!>!
Int

This function is deprecated.

Any!
Int
Int
CharSequence!
Int
Float
Int
TouchDelegate!
ArrayList<View!>!
Float
String!
Float
Float
Float
Long
Int
Int
Drawable!
Drawable!
Int
ViewTranslationResponse!
ViewTreeObserver!
Int
Int
Int
WindowId!
WindowInsetsController!
Int

This function is deprecated.

IBinder!
Int
Unit
Float
Float
Float
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
java-static View!
inflate(context: Context!, resource: Int, root: ViewGroup!)
Unit
invalidate(dirty: Rect!)

This function is deprecated.

Unit
Unit
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean

This function is deprecated.

Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Boolean
Unit
View!
keyboardNavigationClusterSearch(currentCluster: View!, direction: Int)
Unit
layout(l: Int, t: Int, r: Int, b: Int)
Unit
measure(widthMeasureSpec: Int, heightMeasureSpec: Int)
java-static IntArray<Int>!
mergeDrawableStates(baseState: IntArray!, additionalState: IntArray!)
Unit
Unit
Unit
Unit
WindowInsets!
Unit
Unit
Boolean
Boolean
Unit
Unit
IntArray<Int>!
InputConnection!
Unit
onCreateViewTranslationRequest(
    supportedFormats: IntArray!,
    requestsCollector: Consumer<ViewTranslationRequest!>!
)
Unit
onCreateVirtualViewTranslationRequests(
    virtualIds: LongArray!,
    supportedFormats: IntArray!,
    requestsCollector: Consumer<ViewTranslationRequest!>!
)
Unit
Unit
Boolean
Unit
onDraw(canvas: Canvas!)
Unit
Unit
Boolean
Unit
Unit
Unit
onFocusChanged(
    gainFocus: Boolean,
    direction: Int,
    previouslyFocusedRect: Rect!
)
Boolean
Unit
Boolean
Unit
Unit
Boolean
onKeyDown(keyCode: Int, event: KeyEvent!)
Boolean
onKeyLongPress(keyCode: Int, event: KeyEvent!)
Boolean
onKeyMultiple(keyCode: Int, repeatCount: Int, event: KeyEvent!)
Boolean
onKeyPreIme(keyCode: Int, event: KeyEvent!)
Boolean
onKeyShortcut(keyCode: Int, event: KeyEvent!)
Boolean
onKeyUp(keyCode: Int, event: KeyEvent!)
Unit
onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int)
Unit
onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int)
Unit
onOverScrolled(
    scrollX: Int,
    scrollY: Int,
    clampedX: Boolean,
    clampedY: Boolean
)
Unit
Unit
Unit
Unit
Unit
Unit
Unit
ContentInfo!
PointerIcon!
onResolvePointerIcon(event: MotionEvent!, pointerIndex: Int)
Unit
Unit
onRtlPropertiesChanged(layoutDirection: Int)
Parcelable!
Unit
onScreenStateChanged(screenState: Int)
Unit
onScrollCaptureSearch(
    localVisibleRect: Rect!,
    windowOffset: Point!,
    targets: Consumer<ScrollCaptureTarget!>!
)
Unit
onScrollChanged(l: Int, t: Int, oldl: Int, oldt: Int)
Boolean
onSetAlpha(alpha: Int)
Unit
onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int)
Unit
Boolean
Boolean
Unit
Unit
Unit
Unit
onVisibilityChanged(changedView: View!, visibility: Int)
Unit
onWindowFocusChanged(hasWindowFocus: Boolean)
Unit

This function is deprecated.

Unit
Boolean
overScrollBy(
    deltaX: Int,
    deltaY: Int,
    scrollX: Int,
    scrollY: Int,
    scrollRangeX: Int,
    scrollRangeY: Int,
    maxOverScrollX: Int,
    maxOverScrollY: Int,
    isTouchEvent: Boolean
)
Boolean
performAccessibilityAction(action: Int, arguments: Bundle!)
Boolean
Boolean
Boolean
performHapticFeedback(feedbackConstant: Int)
Boolean
ContentInfo!
Unit
playSoundEffect(soundConstant: Int)
Boolean
post(action: Runnable!)
Boolean
postDelayed(action: Runnable!, delayMillis: Long)
Unit
Unit
postInvalidateDelayed(delayMilliseconds: Long)
Unit
Unit
Unit
postOnAnimationDelayed(action: Runnable!, delayMillis: Long)
Unit
Unit
Boolean
Unit
Unit
Unit
Unit
Unit

This function is deprecated.

Boolean
Boolean
Unit
Unit
Boolean
Unit
T!
<T : View?> requireViewById(id: Int)
Unit
java-static Int
resolveSize(size: Int, measureSpec: Int)
java-static Int
resolveSizeAndState(size: Int, measureSpec: Int, childMeasuredState: Int)
Boolean
Unit
Unit
saveAttributeDataForStyleable(
    context: Context!,
    styleable: IntArray!,
    attrs: AttributeSet!,
    t: TypedArray!,
    defStyleAttr: Int,
    defStyleRes: Int
)
Unit
Unit
scheduleDrawable(who: Drawable!, what: Runnable!, when: Long)
Unit
scrollBy(x: Int, y: Int)
Unit
scrollTo(x: Int, y: Int)
Unit
Unit
Unit
setAccessibilityDataSensitive(accessibilityDataSensitive: Int)
Unit
Unit
Unit
Unit
setAccessibilityPaneTitle(accessibilityPaneTitle: CharSequence!)
Unit
Unit
Unit
setActivated(activated: Boolean)
Unit
setAllowClickWhenDisabled(clickableWhenDisabled: Boolean)
Unit
Unit
Unit
setAlpha(alpha: Float)
Unit
setAnimation(animation: Animation!)
Unit
Unit
Unit
setAutofillHints(autofillHints: Array<String!>!)
Unit
Unit
setBackground(background: Drawable!)
Unit
Unit

This function is deprecated.

Unit
Unit
Unit
Unit
Unit
setBottom(bottom: Int)
Unit
Unit
setClickable(clickable: Boolean)
Unit
setClipBounds(clipBounds: Rect!)
Unit
setClipToOutline(clipToOutline: Boolean)
Unit
Unit
setContentDescription(contentDescription: CharSequence!)
Unit
setContextClickable(contextClickable: Boolean)
Unit
setDefaultFocusHighlightEnabled(defaultFocusHighlightEnabled: Boolean)
Unit

This function is deprecated.

Unit

This function is deprecated.

Unit

This function is deprecated.

Unit
Unit
setElevation(elevation: Float)
Unit
setEnabled(enabled: Boolean)
Unit
Unit
Unit
setFitsSystemWindows(fitSystemWindows: Boolean)
Unit
setFocusable(focusable: Boolean)
Unit
setFocusableInTouchMode(focusableInTouchMode: Boolean)
Unit
setFocusedByDefault(isFocusedByDefault: Boolean)
Unit
Unit
setForeground(foreground: Drawable!)
Unit
Unit
Unit
Unit
Unit
setHandwritingBoundsOffsets(
    offsetLeft: Float,
    offsetTop: Float,
    offsetRight: Float,
    offsetBottom: Float
)
Unit
Unit
setHapticFeedbackEnabled(hapticFeedbackEnabled: Boolean)
Unit
setHasTransientState(hasTransientState: Boolean)
Unit
setHorizontalFadingEdgeEnabled(horizontalFadingEdgeEnabled: Boolean)
Unit
setHorizontalScrollBarEnabled(horizontalScrollBarEnabled: Boolean)
Unit
Unit
Unit
setHovered(hovered: Boolean)
Unit
setId(id: Int)
Unit
Unit
Unit
Unit
setIsCredential(isCredential: Boolean)
Unit
setIsHandwritingDelegate(isHandwritingDelegate: Boolean)
Unit
setKeepScreenOn(keepScreenOn: Boolean)
Unit
Unit
Unit
Unit
setLayerType(layerType: Int, paint: Paint!)
Unit
setLayoutDirection(layoutDirection: Int)
Unit
Unit
setLeft(left: Int)
Unit
setLeftTopRightBottom(left: Int, top: Int, right: Int, bottom: Int)
Unit
setLongClickable(longClickable: Boolean)
Unit
setMeasuredDimension(measuredWidth: Int, measuredHeight: Int)
Unit
setMinimumHeight(minHeight: Int)
Unit
setMinimumWidth(minWidth: Int)
Unit
Unit
setNextClusterForwardId(nextClusterForwardId: Int)
Unit
setNextFocusDownId(nextFocusDownId: Int)
Unit
setNextFocusForwardId(nextFocusForwardId: Int)
Unit
setNextFocusLeftId(nextFocusLeftId: Int)
Unit
setNextFocusRightId(nextFocusRightId: Int)
Unit
setNextFocusUpId(nextFocusUpId: Int)
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
setOnReceiveContentListener(
    mimeTypes: Array<String!>!,
    listener: OnReceiveContentListener!
)
Unit
Unit

This function is deprecated.

Unit
Unit
Unit
Unit
Unit
setOverScrollMode(overScrollMode: Int)
Unit
setPadding(left: Int, top: Int, right: Int, bottom: Int)
Unit
setPaddingRelative(start: Int, top: Int, end: Int, bottom: Int)
Unit
setPivotX(pivotX: Float)
Unit
setPivotY(pivotY: Float)
Unit
setPointerIcon(pointerIcon: PointerIcon!)
Unit
setPreferKeepClear(preferKeepClear: Boolean)
Unit
Unit
setPressed(pressed: Boolean)
Unit
setRenderEffect(renderEffect: RenderEffect!)
Unit
setRevealOnFocusHint(revealOnFocus: Boolean)
Unit
setRight(right: Int)
Unit
setRotation(rotation: Float)
Unit
setRotationX(rotationX: Float)
Unit
setRotationY(rotationY: Float)
Unit
Unit
Unit
setScaleX(scaleX: Float)
Unit
setScaleY(scaleY: Float)
Unit
setScreenReaderFocusable(screenReaderFocusable: Boolean)
Unit
setScrollBarDefaultDelayBeforeFade(
    scrollBarDefaultDelayBeforeFade: Int
)
Unit
setScrollBarFadeDuration(scrollBarFadeDuration: Int)
Unit
setScrollBarSize(scrollBarSize: Int)
Unit
Unit
Unit
Unit
setScrollContainer(isScrollContainer: Boolean)
Unit
setScrollIndicators(indicators: Int)
Unit
setScrollX(value: Int)
Unit
setScrollY(value: Int)
Unit
Unit
setSelected(selected: Boolean)
Unit
setSoundEffectsEnabled(soundEffectsEnabled: Boolean)
Unit
setStateDescription(stateDescription: CharSequence!)
Unit
Unit
Unit

This function is deprecated.

Unit
setTag(tag: Any!)
Unit
setTextAlignment(textAlignment: Int)
Unit
setTextDirection(textDirection: Int)
Unit
Unit
setTop(top: Int)
Unit
Unit
Unit
setTransitionName(transitionName: String!)
Unit
Unit
setTranslationX(translationX: Float)
Unit
setTranslationY(translationY: Float)
Unit
setTranslationZ(translationZ: Float)
Unit
setVerticalFadingEdgeEnabled(verticalFadingEdgeEnabled: Boolean)
Unit
setVerticalScrollBarEnabled(verticalScrollBarEnabled: Boolean)
Unit
Unit
Unit
Unit
Unit
setVisibility(visibility: Int)
Unit
setWillNotCacheDrawing(willNotCacheDrawing: Boolean)

This function is deprecated.

Unit
setWillNotDraw(willNotDraw: Boolean)
Unit
Unit
setX(x: Float)
Unit
setY(y: Float)
Unit
setZ(z: Float)
Boolean
ActionMode!
Unit
Boolean
startDrag(
    data: ClipData!,
    shadowBuilder: View.DragShadowBuilder!,
    myLocalState: Any!,
    flags: Int
)

This function is deprecated.

Boolean
startDragAndDrop(
    data: ClipData!,
    shadowBuilder: View.DragShadowBuilder!,
    myLocalState: Any!,
    flags: Int
)
Boolean
Unit
String!
Unit
Unit
Unit
Unit
Boolean
Boolean

This function is deprecated.

Boolean

Public constructors

MotionHelper

Added in 2.2.0-alpha13
MotionHelper(context: Context!)

MotionHelper

Added in 2.2.0-alpha13
MotionHelper(context: Context!, attrs: AttributeSet!)

MotionHelper

Added in 2.2.0-alpha13
MotionHelper(context: Context!, attrs: AttributeSet!, defStyleAttr: Int)

Public functions

getProgress

Added in 2.2.0-alpha13
fun getProgress(): Float

get the progress

Returns
Float

isDecorator

Added in 2.2.0-alpha13
fun isDecorator(): Boolean

is involved in painting

Returns
Boolean

isUseOnHide

Added in 2.2.0-alpha13
fun isUseOnHide(): Boolean
Returns
Boolean

isUsedOnShow

Added in 2.2.0-alpha13
fun isUsedOnShow(): Boolean
Returns
Boolean

onFinishedMotionScene

Added in 2.2.0-alpha13
fun onFinishedMotionScene(motionLayout: MotionLayout!): Unit

This is called after motionLayout read motionScene and assembles all constraintSets

Parameters
motionLayout: MotionLayout!

onPostDraw

Added in 2.2.0-alpha13
fun onPostDraw(canvas: Canvas!): Unit

Called after views are painted

Parameters
canvas: Canvas!

onPreDraw

Added in 2.2.0-alpha13
fun onPreDraw(canvas: Canvas!): Unit

Call before views are painted

Parameters
canvas: Canvas!

onPreSetup

Added in 2.2.0-alpha13
fun onPreSetup(
    motionLayout: MotionLayout!,
    controllerMap: HashMap<View!, MotionController!>!
): Unit

Called after motionController is populated with start and end and keyframes.

Parameters
motionLayout: MotionLayout!
controllerMap: HashMap<View!, MotionController!>!

onTransitionChange

Added in 2.2.0-alpha13
fun onTransitionChange(
    motionLayout: MotionLayout!,
    startId: Int,
    endId: Int,
    progress: Float
): Unit

Called when a drawer's position changes.

Parameters
motionLayout: MotionLayout!

The TransitionLayout view that was moved

startId: Int

the id of the start state (or ConstraintSet). Will be -1 if unknown.

endId: Int

the id of the end state (or ConstraintSet).

progress: Float

The progress on this transition, from 0 to 1.

onTransitionCompleted

Added in 2.2.0-alpha13
fun onTransitionCompleted(motionLayout: MotionLayout!, currentId: Int): Unit

Called when a drawer has settled completely a state. The TransitionLayout is interactive at this point.

Parameters
motionLayout: MotionLayout!

Drawer view that is now open

currentId: Int

the id it has reached

onTransitionStarted

Added in 2.2.0-alpha13
fun onTransitionStarted(motionLayout: MotionLayout!, startId: Int, endId: Int): Unit

Called when a drawer is about to start a transition. Note. startId may be -1 if starting from an "undefined state"

Parameters
motionLayout: MotionLayout!

The TransitionLayout view that was moved

startId: Int

the id of the start state (or ConstraintSet). Will be -1 if unknown.

endId: Int

the id of the end state (or ConstraintSet).

onTransitionTrigger

Added in 2.2.0-alpha13
fun onTransitionTrigger(
    motionLayout: MotionLayout!,
    triggerId: Int,
    positive: Boolean,
    progress: Float
): Unit

Call when a trigger is fired

Parameters
motionLayout: MotionLayout!
triggerId: Int

The id set set with triggerID

positive: Boolean

for positive transition edge

progress: Float

setProgress

Added in 2.2.0-alpha13
fun setProgress(progress: Float): Unit

Set the progress

Parameters
progress: Float

setProgress

Added in 2.2.0-alpha13
fun setProgress(view: View!, progress: Float): Unit
Parameters
view: View!
progress: Float

Protected functions

init

protected fun init(attrs: AttributeSet!): Unit

Protected properties

views

Added in 2.2.0-alpha13
protected val viewsArray<View!>!