Flow

Artifact: androidx.constraintlayout:constraintlayout

Added in 2.2.2

Kotlin |Java

public class Flow extends VirtualLayout

java.lang.Object
↳	android.view.View
	↳	androidx.constraintlayout.widget.ConstraintHelper
		↳	androidx.constraintlayout.widget.VirtualLayout
			↳	androidx.constraintlayout.helper.widget.Flow

Flow VirtualLayout. Added in 2.0 Allows positioning of referenced widgets horizontally or vertically, similar to a Chain. The elements referenced are indicated via constraint_referenced_ids, as with other ConstraintHelper implementations. Those referenced widgets are then laid out by the Flow virtual layout in three possible ways:

wrap none : simply create a chain out of the referenced elements
wrap chain : create multiple chains (one after the other) if the referenced elements do not fit
wrap aligned : similar to wrap chain, but will align the elements by creating rows and columns

As VirtualLayouts are ConstraintHelpers, they are normal views; you can thus treat them as such, and setting up constraints on them (position, dimension) or some view attributes (background, padding) will work. The main difference between VirtualLayouts and ViewGroups is that:

VirtualLayout keep the hierarchy flat
Other views can thus reference / constrain to not only the VirtualLayout, but also the views laid out by the VirtualLayout
VirtualLayout allow on the fly behavior modifications (e.g. for Flow, changing the orientation)

flow_wrapMode = "none"

This will simply create an horizontal or vertical chain out of the referenced widgets. This is the default behavior of Flow. XML attributes that are allowed in this mode:

flow_horizontalStyle = "spread|spread_inside|packed"
flow_verticalStyle = "spread|spread_inside|packed"
flow_horizontalBias = "float"
flow_verticalBias = "float"
flow_horizontalGap = "dimension"
flow_verticalGap = "dimension"
flow_horizontalAlign = "start|end"
flow_verticalAlign = "top|bottom|center|baseline

While the elements are laid out as a chain in the orientation defined, the way they are laid out in the other dimension is controlled by flow_horizontalAlign and flow_verticalAlign attributes.

flow_wrapMode = "chain"

Similar to wrap none in terms of creating chains, but if the referenced widgets do not fit the horizontal or vertical dimension (depending on the orientation picked), they will wrap around to the next line / column. XML attributes are the same same as in wrap_none, with the addition of attributes specifying chain style and chain bias applied to the first chain. This way, it is possible to specify different chain behavior between the first chain and the rest of the chains eventually created.

flow_firstHorizontalStyle = "spread|spread_inside|packed"
flow_firstVerticalStyle = "spread|spread_inside|packed"
flow_firstHorizontalBias = "float"
flow_firstVerticalBias = "float"

One last important attribute is flow_maxElementsWrap, which specify the number of elements before wrapping, regardless if they fit or not in the available space.

flow_wrapMode = "aligned"

Same XML attributes as for WRAP_CHAIN, with the difference that the elements are going to be laid out in a set of rows and columns instead of chains. The attribute specifying chains style and bias are thus not going to be applied.

Summary

Constants
`static final int`	`CHAIN_PACKED = 2`
`static final int`	`CHAIN_SPREAD = 0`
`static final int`	`CHAIN_SPREAD_INSIDE = 1`
`static final int`	`HORIZONTAL = 0`
`static final int`	`HORIZONTAL_ALIGN_CENTER = 2`
`static final int`	`HORIZONTAL_ALIGN_END = 1`
`static final int`	`HORIZONTAL_ALIGN_START = 0`
`static final int`	`VERTICAL = 1`
`static final int`	`VERTICAL_ALIGN_BASELINE = 3`
`static final int`	`VERTICAL_ALIGN_BOTTOM = 1`
`static final int`	`VERTICAL_ALIGN_CENTER = 2`
`static final int`	`VERTICAL_ALIGN_TOP = 0`
`static final int`	`WRAP_ALIGNED = 2`
`static final int`	`WRAP_CHAIN = 1`
`static final int`	`WRAP_NONE = 0`

Public constructors
`Flow(Context context)`
`Flow(Context context, AttributeSet attrs)`
`Flow(Context context, AttributeSet attrs, int defStyleAttr)`

Public methods
`void`	`loadParameters( ConstraintSet.Constraint constraint, HelperWidget child, ConstraintLayout.LayoutParams layoutParams, SparseArray<ConstraintWidget> mapIdToWidget )`
`void`	`onMeasure( VirtualLayout layout, int widthMeasureSpec, int heightMeasureSpec )`
`void`	`resolveRtl(ConstraintWidget widget, boolean isRtl)`
`void`	`setFirstHorizontalBias(float bias)` Similar to setHorizontalBias(), but only applied to the first chain.
`void`	`setFirstHorizontalStyle(int style)` Similar to setHorizontalStyle(), but only applies to the first chain.
`void`	`setFirstVerticalBias(float bias)` Similar to setVerticalBias(), but only applied to the first chain.
`void`	`setFirstVerticalStyle(int style)` Similar to setVerticalStyle(), but only applies to the first chain.
`void`	`setHorizontalAlign(int align)` Set up the horizontal alignment of the elements in the layout, if the layout orientation is set to Flow.VERTICAL Can be either: Flow.HORIZONTAL_ALIGN_START Flow.HORIZONTAL_ALIGN_END Flow.HORIZONTAL_ALIGN_CENTER
`void`	`setHorizontalBias(float bias)` Set the horizontal bias applied to the chain
`void`	`setHorizontalGap(int gap)` Set up the horizontal gap between elements
`void`	`setHorizontalStyle(int style)` Set horizontal chain style.
`void`	`setLastHorizontalBias(float bias)` Set the bias of the last Horizontal column.
`void`	`setLastHorizontalStyle(int style)` Set the style of the last Horizontal column.
`void`	`setLastVerticalBias(float bias)` Set the bias of the last vertical row.
`void`	`setLastVerticalStyle(int style)` Set the style of the last vertical row.
`void`	`setMaxElementsWrap(int max)` Set up the maximum number of elements before wrapping.
`void`	`setOrientation(int orientation)` Set the orientation of the layout
`void`	`setPadding(int padding)` Set padding around the content
`void`	`setPaddingBottom(int paddingBottom)` Set padding bottom around the content
`void`	`setPaddingLeft(int paddingLeft)` Set padding left around the content
`void`	`setPaddingRight(int paddingRight)` Set padding right around the content
`void`	`setPaddingTop(int paddingTop)` Set padding top around the content
`void`	`setVerticalAlign(int align)` Set up the vertical alignment of the elements in the layout, if the layout orientation is set to Flow.HORIZONTAL Can be either: Flow.VERTICAL_ALIGN_TOP Flow.VERTICAL_ALIGN_BOTTOM Flow.VERTICAL_ALIGN_CENTER Flow.VERTICAL_ALIGN_BASELINE
`void`	`setVerticalBias(float bias)` Set the vertical bias applied to the chain
`void`	`setVerticalGap(int gap)` Set up the vertical gap between elements
`void`	`setVerticalStyle(int style)` Set vertical chain style.
`void`	`setWrapMode(int mode)` Set wrap mode for the layout.

Protected methods
`void`	`init(AttributeSet attrs)`
`void`	`onMeasure(int widthMeasureSpec, int heightMeasureSpec)`

Inherited Constants

From androidx.constraintlayout.widget.ConstraintHelper

static final String

CHILD_TAG = "CONSTRAINT_LAYOUT_HELPER_CHILD"

From android.view.View

`static final int`	`ACCESSIBILITY_DATA_SENSITIVE_AUTO = 0`
`static final int`	`ACCESSIBILITY_DATA_SENSITIVE_NO = 2`
`static final int`	`ACCESSIBILITY_DATA_SENSITIVE_YES = 1`
`static final int`	`ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 2`
`static final int`	`ACCESSIBILITY_LIVE_REGION_NONE = 0`
`static final int`	`ACCESSIBILITY_LIVE_REGION_POLITE = 1`
`static final Property<View, Float>`	`ALPHA`
`static final int`	`AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS = 1`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE = "creditCardExpirationDate"`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY = "creditCardExpirationDay"`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH = "creditCardExpirationMonth"`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR = "creditCardExpirationYear"`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_NUMBER = "creditCardNumber"`
`static final String`	`AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE = "creditCardSecurityCode"`
`static final String`	`AUTOFILL_HINT_EMAIL_ADDRESS = "emailAddress"`
`static final String`	`AUTOFILL_HINT_NAME = "name"`
`static final String`	`AUTOFILL_HINT_PASSWORD = "password"`
`static final String`	`AUTOFILL_HINT_PHONE = "phone"`
`static final String`	`AUTOFILL_HINT_POSTAL_ADDRESS = "postalAddress"`
`static final String`	`AUTOFILL_HINT_POSTAL_CODE = "postalCode"`
`static final String`	`AUTOFILL_HINT_USERNAME = "username"`
`static final int`	`AUTOFILL_TYPE_DATE = 4`
`static final int`	`AUTOFILL_TYPE_LIST = 3`
`static final int`	`AUTOFILL_TYPE_NONE = 0`
`static final int`	`AUTOFILL_TYPE_TEXT = 1`
`static final int`	`AUTOFILL_TYPE_TOGGLE = 2`
`static final int`	`CONTENT_SENSITIVITY_AUTO = 0`
`static final int`	`CONTENT_SENSITIVITY_NOT_SENSITIVE = 2`
`static final int`	`CONTENT_SENSITIVITY_SENSITIVE = 1`
`static final int`	`DRAG_FLAG_ACCESSIBILITY_ACTION = 1024`
`static final int`	`DRAG_FLAG_GLOBAL = 256`
`static final int`	`DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION = 64`
`static final int`	`DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION = 128`
`static final int`	`DRAG_FLAG_GLOBAL_SAME_APPLICATION = 4096`
`static final int`	`DRAG_FLAG_GLOBAL_URI_READ = 1`
`static final int`	`DRAG_FLAG_GLOBAL_URI_WRITE = 2`
`static final int`	`DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START = 16384`
`static final int`	`DRAG_FLAG_OPAQUE = 512`
`static final int`	`DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG = 8192`
`static final int`	`DRAWING_CACHE_QUALITY_AUTO = 0` This field is deprecated.
`static final int`	`DRAWING_CACHE_QUALITY_HIGH = 1048576` This field is deprecated.
`static final int`	`DRAWING_CACHE_QUALITY_LOW = 524288` This field is deprecated.
`static final int[]`	`EMPTY_STATE_SET`
`static final int[]`	`ENABLED_FOCUSED_SELECTED_STATE_SET`
`static final int[]`	`ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`ENABLED_FOCUSED_STATE_SET`
`static final int[]`	`ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`ENABLED_SELECTED_STATE_SET`
`static final int[]`	`ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`ENABLED_STATE_SET`
`static final int[]`	`ENABLED_WINDOW_FOCUSED_STATE_SET`
`static final int`	`FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 2`
`static final int`	`FIND_VIEWS_WITH_TEXT = 1`
`static final int`	`FOCUSABLE = 1`
`static final int`	`FOCUSABLES_ALL = 0`
`static final int`	`FOCUSABLES_TOUCH_MODE = 1`
`static final int`	`FOCUSABLE_AUTO = 16`
`static final int[]`	`FOCUSED_SELECTED_STATE_SET`
`static final int[]`	`FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`FOCUSED_STATE_SET`
`static final int[]`	`FOCUSED_WINDOW_FOCUSED_STATE_SET`
`static final int`	`FOCUS_BACKWARD = 1`
`static final int`	`FOCUS_DOWN = 130`
`static final int`	`FOCUS_FORWARD = 2`
`static final int`	`FOCUS_LEFT = 17`
`static final int`	`FOCUS_RIGHT = 66`
`static final int`	`FOCUS_UP = 33`
`static final int`	`GONE = 8`
`static final int`	`HAPTIC_FEEDBACK_ENABLED = 268435456`
`static final int`	`IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0`
`static final int`	`IMPORTANT_FOR_ACCESSIBILITY_NO = 2`
`static final int`	`IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 4`
`static final int`	`IMPORTANT_FOR_ACCESSIBILITY_YES = 1`
`static final int`	`IMPORTANT_FOR_AUTOFILL_AUTO = 0`
`static final int`	`IMPORTANT_FOR_AUTOFILL_NO = 2`
`static final int`	`IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS = 8`
`static final int`	`IMPORTANT_FOR_AUTOFILL_YES = 1`
`static final int`	`IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS = 4`
`static final int`	`IMPORTANT_FOR_CONTENT_CAPTURE_AUTO = 0`
`static final int`	`IMPORTANT_FOR_CONTENT_CAPTURE_NO = 2`
`static final int`	`IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS = 8`
`static final int`	`IMPORTANT_FOR_CONTENT_CAPTURE_YES = 1`
`static final int`	`IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS = 4`
`static final int`	`INVISIBLE = 4`
`static final int`	`KEEP_SCREEN_ON = 67108864`
`static final int`	`LAYER_TYPE_HARDWARE = 2`
`static final int`	`LAYER_TYPE_NONE = 0`
`static final int`	`LAYER_TYPE_SOFTWARE = 1`
`static final int`	`LAYOUT_DIRECTION_INHERIT = 2`
`static final int`	`LAYOUT_DIRECTION_LOCALE = 3`
`static final int`	`LAYOUT_DIRECTION_LTR = 0`
`static final int`	`LAYOUT_DIRECTION_RTL = 1`
`static final int`	`MEASURED_HEIGHT_STATE_SHIFT = 16`
`static final int`	`MEASURED_SIZE_MASK = 16777215`
`static final int`	`MEASURED_STATE_MASK = -16777216`
`static final int`	`MEASURED_STATE_TOO_SMALL = 16777216`
`static final int`	`NOT_FOCUSABLE = 0`
`static final int`	`NO_ID = -1`
`static final int`	`OVER_SCROLL_ALWAYS = 0`
`static final int`	`OVER_SCROLL_IF_CONTENT_SCROLLS = 1`
`static final int`	`OVER_SCROLL_NEVER = 2`
`static final int`	`POINTER_CAPTURE_MODE_ABSOLUTE = 1`
`static final int`	`POINTER_CAPTURE_MODE_RELATIVE = 2`
`static final int`	`POINTER_CAPTURE_MODE_UNCAPTURED = 0`
`static final int[]`	`PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_SELECTED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_STATE_SET`
`static final int[]`	`PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_FOCUSED_SELECTED_STATE_SET`
`static final int[]`	`PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_SELECTED_STATE_SET`
`static final int[]`	`PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int[]`	`PRESSED_STATE_SET`
`static final int[]`	`PRESSED_WINDOW_FOCUSED_STATE_SET`
`static final int`	`RECTANGLE_ON_SCREEN_REQUEST_SOURCE_INPUT_FOCUS = 3`
`static final int`	`RECTANGLE_ON_SCREEN_REQUEST_SOURCE_SCROLL_ONLY = 1`
`static final int`	`RECTANGLE_ON_SCREEN_REQUEST_SOURCE_TEXT_CURSOR = 2`
`static final int`	`RECTANGLE_ON_SCREEN_REQUEST_SOURCE_UNDEFINED = 0`
`static final float`	`REQUESTED_FRAME_RATE_CATEGORY_DEFAULT`
`static final float`	`REQUESTED_FRAME_RATE_CATEGORY_HIGH = -4.0f`
`static final float`	`REQUESTED_FRAME_RATE_CATEGORY_LOW = -2.0f`
`static final float`	`REQUESTED_FRAME_RATE_CATEGORY_NORMAL = -3.0f`
`static final float`	`REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE = -1.0f`
`static final Property<View, Float>`	`ROTATION`
`static final Property<View, Float>`	`ROTATION_X`
`static final Property<View, Float>`	`ROTATION_Y`
`static final Property<View, Float>`	`SCALE_X`
`static final Property<View, Float>`	`SCALE_Y`
`static final int`	`SCREEN_STATE_OFF = 0`
`static final int`	`SCREEN_STATE_ON = 1`
`static final int`	`SCROLLBARS_INSIDE_INSET = 16777216`
`static final int`	`SCROLLBARS_INSIDE_OVERLAY = 0`
`static final int`	`SCROLLBARS_OUTSIDE_INSET = 50331648`
`static final int`	`SCROLLBARS_OUTSIDE_OVERLAY = 33554432`
`static final int`	`SCROLLBAR_POSITION_DEFAULT = 0`
`static final int`	`SCROLLBAR_POSITION_LEFT = 1`
`static final int`	`SCROLLBAR_POSITION_RIGHT = 2`
`static final int`	`SCROLL_AXIS_HORIZONTAL = 1`
`static final int`	`SCROLL_AXIS_NONE = 0`
`static final int`	`SCROLL_AXIS_VERTICAL = 2`
`static final int`	`SCROLL_CAPTURE_HINT_AUTO = 0`
`static final int`	`SCROLL_CAPTURE_HINT_EXCLUDE = 1`
`static final int`	`SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS = 4`
`static final int`	`SCROLL_CAPTURE_HINT_INCLUDE = 2`
`static final int`	`SCROLL_INDICATOR_BOTTOM = 2`
`static final int`	`SCROLL_INDICATOR_END = 32`
`static final int`	`SCROLL_INDICATOR_LEFT = 4`
`static final int`	`SCROLL_INDICATOR_RIGHT = 8`
`static final int`	`SCROLL_INDICATOR_START = 16`
`static final int`	`SCROLL_INDICATOR_TOP = 1`
`static final int[]`	`SELECTED_STATE_SET`
`static final int[]`	`SELECTED_WINDOW_FOCUSED_STATE_SET`
`static final int`	`SOUND_EFFECTS_ENABLED = 134217728`
`static final int`	`STATUS_BAR_HIDDEN = 1` This field is deprecated.
`static final int`	`STATUS_BAR_VISIBLE = 0` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_FULLSCREEN = 4` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_HIDE_NAVIGATION = 2` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_IMMERSIVE = 2048` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 4096` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 1024` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 512` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LAYOUT_STABLE = 256` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR = 16` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 8192` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_LOW_PROFILE = 1` This field is deprecated.
`static final int`	`SYSTEM_UI_FLAG_VISIBLE = 0` This field is deprecated.
`static final int`	`SYSTEM_UI_LAYOUT_FLAGS = 1536` This field is deprecated.
`static final int`	`TEXT_ALIGNMENT_CENTER = 4`
`static final int`	`TEXT_ALIGNMENT_GRAVITY = 1`
`static final int`	`TEXT_ALIGNMENT_INHERIT = 0`
`static final int`	`TEXT_ALIGNMENT_TEXT_END = 3`
`static final int`	`TEXT_ALIGNMENT_TEXT_START = 2`
`static final int`	`TEXT_ALIGNMENT_VIEW_END = 6`
`static final int`	`TEXT_ALIGNMENT_VIEW_START = 5`
`static final int`	`TEXT_DIRECTION_ANY_RTL = 2`
`static final int`	`TEXT_DIRECTION_FIRST_STRONG = 1`
`static final int`	`TEXT_DIRECTION_FIRST_STRONG_LTR = 6`
`static final int`	`TEXT_DIRECTION_FIRST_STRONG_RTL = 7`
`static final int`	`TEXT_DIRECTION_INHERIT = 0`
`static final int`	`TEXT_DIRECTION_LOCALE = 5`
`static final int`	`TEXT_DIRECTION_LTR = 3`
`static final int`	`TEXT_DIRECTION_RTL = 4`
`static final Property<View, Float>`	`TRANSLATION_X`
`static final Property<View, Float>`	`TRANSLATION_Y`
`static final Property<View, Float>`	`TRANSLATION_Z`
`static final String`	`VIEW_LOG_TAG = "View"`
`static final int`	`VISIBLE = 0`
`static final int[]`	`WINDOW_FOCUSED_STATE_SET`
`static final Property<View, Float>`	`X`
`static final Property<View, Float>`	`Y`
`static final Property<View, Float>`	`Z`

Inherited fields

From androidx.constraintlayout.widget.ConstraintHelper

`int`	`mCount`
`Helper`	`mHelperWidget`
`int[]`	`mIds`
`HashMap<Integer, String>`	`mMap`
`String`	`mReferenceIds`
`String`	`mReferenceTags`
`boolean`	`mUseViewMeasure`
`Context`	`myContext`

Inherited methods

From androidx.constraintlayout.widget.ConstraintHelper

`void`	`addView(View view)` Add a view to the helper.
`void`	`applyHelperParams()` hook for helpers to apply parameters in MotionLayout
`void`	`applyLayoutFeatures()`
`void`	`applyLayoutFeatures(ConstraintLayout container)`
`boolean`	`containsId(int id)` does id table contain the id
`int[]`	`getReferencedIds()` Helpers typically reference a collection of ids
`View[]`	`getViews(ConstraintLayout layout)`
`int`	`indexFromId(int id)` find the position of an id
`static boolean`	`isChildOfHelper(View v)`
`void`	`onDraw(@NonNull Canvas canvas)`
`int`	`removeView(View view)` Remove a given view from the helper.
`void`	`setIds(String idList)`
`void`	`setReferenceTags(String tagList)`
`void`	`setReferencedIds(int[] ids)` Helpers typically reference a collection of ids
`void`	`setTag(int key, Object tag)`
`void`	`updatePostConstraints(ConstraintLayout container)` update after constraints are resolved
`void`	`updatePostLayout(ConstraintLayout container)` Allows a helper a chance to update its internal object post layout or set up connections for the pointed elements
`void`	`updatePostMeasure(ConstraintLayout container)`
`void`	`updatePreDraw(ConstraintLayout container)` called before the draw
`void`	`updatePreLayout(ConstraintLayout container)` Allows a helper a chance to update its internal object pre layout or set up connections for the pointed elements
`void`	`updatePreLayout( ConstraintWidgetContainer container, Helper helper, SparseArray<ConstraintWidget> map )` called before solver resolution
`void`	`validateParams()` Allows a helper to replace the default ConstraintWidget in LayoutParams by its own subclass

From android.view.View

`void`	`addChildrenForAccessibility(ArrayList<View> outChildren)`
`void`	`addExtraDataToAccessibilityNodeInfo( AccessibilityNodeInfo info, String extraDataKey, Bundle arguments )`
`void`	`addFocusables(ArrayList<View> views, int direction)`
`void`	`addKeyboardNavigationClusters(Collection<View> views, int direction)`
`void`	`addOnAttachStateChangeListener( View.OnAttachStateChangeListener listener )`
`void`	`addOnLayoutChangeListener(View.OnLayoutChangeListener listener)`
`void`	`addOnUnhandledKeyEventListener( View.OnUnhandledKeyEventListener listener )`
`void`	`addTouchables(ArrayList<View> views)`
`ViewPropertyAnimator`	`animate()`
`void`	`announceForAccessibility(CharSequence text)` This method is deprecated.
`void`	`autofill(SparseArray<AutofillValue> values)`
`boolean`	`awakenScrollBars()`
`void`	`bringToFront()`
`void`	`buildDrawingCache()` This method is deprecated.
`void`	`buildLayer()`
`boolean`	`callOnClick()`
`boolean`	`canResolveLayoutDirection()`
`boolean`	`canResolveTextAlignment()`
`boolean`	`canResolveTextDirection()`
`boolean`	`canScrollHorizontally(int direction)`
`boolean`	`canScrollVertically(int direction)`
`final void`	`cancelDragAndDrop()`
`void`	`cancelLongPress()`
`final void`	`cancelPendingInputEvents()`
`boolean`	`checkInputConnectionProxy(View view)`
`void`	`clearAnimation()`
`void`	`clearFocus()`
`void`	`clearPendingCredentialRequest()`
`void`	`clearViewTranslationCallback()`
`static int`	`combineMeasuredStates(int curState, int newState)`
`int`	`computeHorizontalScrollExtent()`
`int`	`computeHorizontalScrollOffset()`
`int`	`computeHorizontalScrollRange()`
`void`	`computeScroll()`
`WindowInsets`	`computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets)`
`int`	`computeVerticalScrollExtent()`
`int`	`computeVerticalScrollOffset()`
`int`	`computeVerticalScrollRange()`
`AccessibilityNodeInfo`	`createAccessibilityNodeInfo()`
`void`	`createContextMenu(ContextMenu menu)`
`void`	`destroyDrawingCache()` This method is deprecated.
`WindowInsets`	`dispatchApplyWindowInsets(WindowInsets insets)`
`boolean`	`dispatchCapturedPointerEvent(MotionEvent event)`
`void`	`dispatchConfigurationChanged(Configuration newConfig)`
`void`	`dispatchCreateViewTranslationRequest( Map<AutofillId, long[]> viewIds, int[] supportedFormats, TranslationCapability capability, List<ViewTranslationRequest> requests )`
`void`	`dispatchDisplayHint(int hint)`
`boolean`	`dispatchDragEvent(DragEvent event)`
`void`	`dispatchDraw(Canvas canvas)`
`void`	`dispatchDrawableHotspotChanged(float x, float y)`
`void`	`dispatchFinishTemporaryDetach()`
`boolean`	`dispatchGenericFocusedEvent(MotionEvent event)`
`boolean`	`dispatchGenericMotionEvent(MotionEvent event)`
`boolean`	`dispatchGenericPointerEvent(MotionEvent event)`
`boolean`	`dispatchHoverEvent(MotionEvent event)`
`boolean`	`dispatchKeyEvent(KeyEvent event)`
`boolean`	`dispatchKeyEventPreIme(KeyEvent event)`
`boolean`	`dispatchKeyShortcutEvent(KeyEvent event)`
`boolean`	`dispatchNestedFling(float velocityX, float velocityY, boolean consumed)`
`boolean`	`dispatchNestedPreFling(float velocityX, float velocityY)`
`boolean`	`dispatchNestedPrePerformAccessibilityAction( int action, Bundle arguments )`
`boolean`	`dispatchNestedPreScroll( int dx, int dy, int[] consumed, int[] offsetInWindow )`
`boolean`	`dispatchNestedScroll( int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow )`
`void`	`dispatchPointerCaptureChanged(boolean hasCapture)`
`boolean`	`dispatchPopulateAccessibilityEvent(AccessibilityEvent event)`
`void`	`dispatchProvideAutofillStructure(ViewStructure structure, int flags)`
`void`	`dispatchProvideStructure(ViewStructure structure)`
`void`	`dispatchRestoreInstanceState(SparseArray<Parcelable> container)`
`void`	`dispatchSaveInstanceState(SparseArray<Parcelable> container)`
`void`	`dispatchScrollCaptureSearch( Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets )`
`void`	`dispatchSetActivated(boolean activated)`
`void`	`dispatchSetPressed(boolean pressed)`
`void`	`dispatchSetSelected(boolean selected)`
`void`	`dispatchStartTemporaryDetach()`
`void`	`dispatchSystemUiVisibilityChanged(int visibility)` This method is deprecated.
`boolean`	`dispatchTouchEvent(MotionEvent event)`
`boolean`	`dispatchTrackballEvent(MotionEvent event)`
`boolean`	`dispatchUnhandledMove(View focused, int direction)`
`void`	`dispatchVisibilityChanged(View changedView, int visibility)`
`void`	`dispatchWindowFocusChanged(boolean hasFocus)`
`void`	`dispatchWindowInsetsAnimationEnd(WindowInsetsAnimation animation)`
`void`	`dispatchWindowInsetsAnimationPrepare(WindowInsetsAnimation animation)`
`WindowInsets`	`dispatchWindowInsetsAnimationProgress( WindowInsets insets, List<WindowInsetsAnimation> runningAnimations )`
`WindowInsetsAnimation.Bounds`	`dispatchWindowInsetsAnimationStart( WindowInsetsAnimation animation, WindowInsetsAnimation.Bounds bounds )`
`void`	`dispatchWindowSystemUiVisiblityChanged(int visible)` This method is deprecated.
`void`	`dispatchWindowVisibilityChanged(int visibility)`
`void`	`draw(Canvas canvas)`
`void`	`drawableHotspotChanged(float x, float y)`
`void`	`drawableStateChanged()`
`View`	`findFocus()`
`final OnBackInvokedDispatcher`	`findOnBackInvokedDispatcher()`
`final T`	`<T extends View> findViewById(int id)`
`final T`	`<T extends View> findViewWithTag(Object tag)`
`void`	`findViewsWithText( ArrayList<View> outViews, CharSequence searched, int flags )`
`boolean`	`fitSystemWindows(Rect insets)` This method is deprecated.
`View`	`focusSearch(int direction)`
`void`	`forceHasOverlappingRendering(boolean hasOverlappingRendering)`
`void`	`forceLayout()`
`boolean`	`gatherTransparentRegion(Region region)`
`void`	`generateDisplayHash( String hashAlgorithm, Rect bounds, Executor executor, DisplayHashResultCallback callback )`
`static int`	`generateViewId()`
`CharSequence`	`getAccessibilityClassName()`
`View.AccessibilityDelegate`	`getAccessibilityDelegate()`
`int`	`getAccessibilityLiveRegion()`
`AccessibilityNodeProvider`	`getAccessibilityNodeProvider()`
`CharSequence`	`getAccessibilityPaneTitle()`
`int`	`getAccessibilityTraversalAfter()`
`int`	`getAccessibilityTraversalBefore()`
`String`	`getAllowedHandwritingDelegatePackageName()`
`String`	`getAllowedHandwritingDelegatorPackageName()`
`float`	`getAlpha()`
`Animation`	`getAnimation()`
`Matrix`	`getAnimationMatrix()`
`IBinder`	`getApplicationWindowToken()`
`int[]`	`getAttributeResolutionStack(int attribute)`
`Map<Integer, Integer>`	`getAttributeSourceResourceMap()`
`String[]`	`getAutofillHints()`
`final AutofillId`	`getAutofillId()`
`int`	`getAutofillType()`
`AutofillValue`	`getAutofillValue()`
`Drawable`	`getBackground()`
`BlendMode`	`getBackgroundTintBlendMode()`
`ColorStateList`	`getBackgroundTintList()`
`PorterDuff.Mode`	`getBackgroundTintMode()`
`int`	`getBaseline()`
`final int`	`getBottom()`
`float`	`getBottomFadingEdgeStrength()`
`int`	`getBottomPaddingOffset()`
`float`	`getCameraDistance()`
`Rect`	`getClipBounds()`
`boolean`	`getClipBounds(Rect outRect)`
`final boolean`	`getClipToOutline()`
`final ContentCaptureSession`	`getContentCaptureSession()`
`CharSequence`	`getContentDescription()`
`final int`	`getContentSensitivity()`
`final Context`	`getContext()`
`ContextMenu.ContextMenuInfo`	`getContextMenuInfo()`
`final boolean`	`getDefaultFocusHighlightEnabled()`
`static int`	`getDefaultSize(int size, int measureSpec)`
`Display`	`getDisplay()`
`final int[]`	`getDrawableState()`
`Bitmap`	`getDrawingCache()` This method is deprecated.
`int`	`getDrawingCacheBackgroundColor()` This method is deprecated.
`int`	`getDrawingCacheQuality()` This method is deprecated.
`void`	`getDrawingRect(Rect outRect)`
`long`	`getDrawingTime()`
`float`	`getElevation()`
`int`	`getExplicitStyle()`
`boolean`	`getFilterTouchesWhenObscured()`
`boolean`	`getFitsSystemWindows()`
`int`	`getFocusable()`
`ArrayList<View>`	`getFocusables(int direction)`
`void`	`getFocusedRect(Rect r)`
`Drawable`	`getForeground()`
`int`	`getForegroundGravity()`
`BlendMode`	`getForegroundTintBlendMode()`
`ColorStateList`	`getForegroundTintList()`
`PorterDuff.Mode`	`getForegroundTintMode()`
`float`	`getFrameContentVelocity()`
`final boolean`	`getGlobalVisibleRect(Rect r)`
`Handler`	`getHandler()`
`float`	`getHandwritingBoundsOffsetBottom()`
`float`	`getHandwritingBoundsOffsetLeft()`
`float`	`getHandwritingBoundsOffsetRight()`
`float`	`getHandwritingBoundsOffsetTop()`
`int`	`getHandwritingDelegateFlags()`
`Runnable`	`getHandwritingDelegatorCallback()`
`final boolean`	`getHasOverlappingRendering()`
`final int`	`getHeight()`
`void`	`getHitRect(Rect outRect)`
`int`	`getHorizontalFadingEdgeLength()`
`int`	`getHorizontalScrollbarHeight()`
`Drawable`	`getHorizontalScrollbarThumbDrawable()`
`Drawable`	`getHorizontalScrollbarTrackDrawable()`
`int`	`getId()`
`int`	`getImportantForAccessibility()`
`int`	`getImportantForAutofill()`
`int`	`getImportantForContentCapture()`
`boolean`	`getKeepScreenOn()`
`KeyEvent.DispatcherState`	`getKeyDispatcherState()`
`int`	`getLabelFor()`
`int`	`getLayerType()`
`int`	`getLayoutDirection()`
`ViewGroup.LayoutParams`	`getLayoutParams()`
`final int`	`getLeft()`
`float`	`getLeftFadingEdgeStrength()`
`int`	`getLeftPaddingOffset()`
`final boolean`	`getLocalVisibleRect(Rect r)`
`void`	`getLocationInSurface(int[] location)`
`void`	`getLocationInWindow(int[] outLocation)`
`void`	`getLocationOnScreen(int[] outLocation)`
`Matrix`	`getMatrix()`
`final int`	`getMeasuredHeight()`
`final int`	`getMeasuredHeightAndState()`
`final int`	`getMeasuredState()`
`final int`	`getMeasuredWidth()`
`final int`	`getMeasuredWidthAndState()`
`int`	`getMinimumHeight()`
`int`	`getMinimumWidth()`
`int`	`getNextClusterForwardId()`
`int`	`getNextFocusDownId()`
`int`	`getNextFocusForwardId()`
`int`	`getNextFocusLeftId()`
`int`	`getNextFocusRightId()`
`int`	`getNextFocusUpId()`
`View.OnFocusChangeListener`	`getOnFocusChangeListener()`
`int`	`getOutlineAmbientShadowColor()`
`ViewOutlineProvider`	`getOutlineProvider()`
`int`	`getOutlineSpotShadowColor()`
`int`	`getOverScrollMode()`
`ViewOverlay`	`getOverlay()`
`int`	`getPaddingBottom()`
`int`	`getPaddingEnd()`
`int`	`getPaddingLeft()`
`int`	`getPaddingRight()`
`int`	`getPaddingStart()`
`int`	`getPaddingTop()`
`final ViewParent`	`getParent()`
`ViewParent`	`getParentForAccessibility()`
`final OutcomeReceiver<GetCredentialResponse, GetCredentialException>`	`getPendingCredentialCallback()`
`final GetCredentialRequest`	`getPendingCredentialRequest()`
`float`	`getPivotX()`
`float`	`getPivotY()`
`PointerIcon`	`getPointerIcon()`
`final List<Rect>`	`getPreferKeepClearRects()`
`String[]`	`getReceiveContentMimeTypes()`
`float`	`getRequestedFrameRate()`
`Resources`	`getResources()`
`final boolean`	`getRevealOnFocusHint()`
`final int`	`getRight()`
`float`	`getRightFadingEdgeStrength()`
`int`	`getRightPaddingOffset()`
`AttachedSurfaceControl`	`getRootSurfaceControl()`
`View`	`getRootView()`
`WindowInsets`	`getRootWindowInsets()`
`float`	`getRotation()`
`float`	`getRotationX()`
`float`	`getRotationY()`
`float`	`getScaleX()`
`float`	`getScaleY()`
`int`	`getScrollBarDefaultDelayBeforeFade()`
`int`	`getScrollBarFadeDuration()`
`int`	`getScrollBarSize()`
`int`	`getScrollBarStyle()`
`int`	`getScrollCaptureHint()`
`int`	`getScrollIndicators()`
`final int`	`getScrollX()`
`final int`	`getScrollY()`
`int`	`getSolidColor()`
`int`	`getSourceLayoutResId()`
`final CharSequence`	`getStateDescription()`
`StateListAnimator`	`getStateListAnimator()`
`int`	`getSuggestedMinimumHeight()`
`int`	`getSuggestedMinimumWidth()`
`CharSequence`	`getSupplementalDescription()`
`List<Rect>`	`getSystemGestureExclusionRects()`
`int`	`getSystemUiVisibility()` This method is deprecated.
`Object`	`getTag()`
`int`	`getTextAlignment()`
`int`	`getTextDirection()`
`CharSequence`	`getTooltipText()`
`final int`	`getTop()`
`float`	`getTopFadingEdgeStrength()`
`int`	`getTopPaddingOffset()`
`TouchDelegate`	`getTouchDelegate()`
`ArrayList<View>`	`getTouchables()`
`float`	`getTransitionAlpha()`
`String`	`getTransitionName()`
`float`	`getTranslationX()`
`float`	`getTranslationY()`
`float`	`getTranslationZ()`
`long`	`getUniqueDrawingId()`
`int`	`getVerticalFadingEdgeLength()`
`int`	`getVerticalScrollbarPosition()`
`Drawable`	`getVerticalScrollbarThumbDrawable()`
`Drawable`	`getVerticalScrollbarTrackDrawable()`
`int`	`getVerticalScrollbarWidth()`
`ViewTranslationResponse`	`getViewTranslationResponse()`
`ViewTreeObserver`	`getViewTreeObserver()`
`int`	`getVisibility()`
`final int`	`getWidth()`
`int`	`getWindowAttachCount()`
`WindowId`	`getWindowId()`
`WindowInsetsController`	`getWindowInsetsController()`
`int`	`getWindowSystemUiVisibility()` This method is deprecated.
`IBinder`	`getWindowToken()`
`int`	`getWindowVisibility()`
`void`	`getWindowVisibleDisplayFrame(Rect outRect)`
`float`	`getX()`
`float`	`getY()`
`float`	`getZ()`
`boolean`	`hasExplicitFocusable()`
`boolean`	`hasFocus()`
`boolean`	`hasFocusable()`
`boolean`	`hasNestedScrollingParent()`
`boolean`	`hasOnClickListeners()`
`boolean`	`hasOnLongClickListeners()`
`boolean`	`hasOverlappingRendering()`
`boolean`	`hasPointerCapture()`
`boolean`	`hasTransientState()`
`boolean`	`hasWindowFocus()`
`static View`	`inflate(Context context, int resource, ViewGroup root)`
`void`	`invalidate()`
`void`	`invalidateDrawable(Drawable drawable)`
`void`	`invalidateOutline()`
`boolean`	`isAccessibilityDataSensitive()`
`boolean`	`isAccessibilityFocused()`
`boolean`	`isAccessibilityHeading()`
`boolean`	`isActivated()`
`boolean`	`isAttachedToWindow()`
`boolean`	`isAutoHandwritingEnabled()`
`boolean`	`isClickable()`
`final boolean`	`isContentSensitive()`
`boolean`	`isContextClickable()`
`boolean`	`isCredential()` This method is deprecated.
`boolean`	`isDirty()`
`boolean`	`isDrawingCacheEnabled()` This method is deprecated.
`boolean`	`isDuplicateParentStateEnabled()`
`boolean`	`isEnabled()`
`final boolean`	`isFocusable()`
`final boolean`	`isFocusableInTouchMode()`
`boolean`	`isFocused()`
`final boolean`	`isFocusedByDefault()`
`boolean`	`isForceDarkAllowed()`
`boolean`	`isHandwritingDelegate()`
`boolean`	`isHapticFeedbackEnabled()`
`boolean`	`isHardwareAccelerated()`
`boolean`	`isHorizontalFadingEdgeEnabled()`
`boolean`	`isHorizontalScrollBarEnabled()`
`boolean`	`isHovered()`
`boolean`	`isImportantForAccessibility()`
`final boolean`	`isImportantForAutofill()`
`final boolean`	`isImportantForContentCapture()`
`boolean`	`isInEditMode()`
`boolean`	`isInLayout()`
`boolean`	`isInTouchMode()`
`final boolean`	`isKeyboardNavigationCluster()`
`boolean`	`isLaidOut()`
`boolean`	`isLayoutDirectionResolved()`
`boolean`	`isLayoutRequested()`
`boolean`	`isLongClickable()`
`boolean`	`isNestedScrollingEnabled()`
`boolean`	`isOpaque()`
`boolean`	`isPaddingOffsetRequired()`
`boolean`	`isPaddingRelative()`
`boolean`	`isPivotSet()`
`final boolean`	`isPreferKeepClear()`
`boolean`	`isPressed()`
`boolean`	`isSaveEnabled()`
`boolean`	`isSaveFromParentEnabled()`
`boolean`	`isScreenReaderFocusable()`
`boolean`	`isScrollContainer()`
`boolean`	`isScrollbarFadingEnabled()`
`boolean`	`isSelected()`
`final boolean`	`isShowingLayoutBounds()`
`boolean`	`isShown()`
`boolean`	`isSoundEffectsEnabled()`
`final boolean`	`isTemporarilyDetached()`
`boolean`	`isTextAlignmentResolved()`
`boolean`	`isTextDirectionResolved()`
`boolean`	`isVerticalFadingEdgeEnabled()`
`boolean`	`isVerticalScrollBarEnabled()`
`boolean`	`isVisibleToUserForAutofill(int virtualId)`
`void`	`jumpDrawablesToCurrentState()`
`View`	`keyboardNavigationClusterSearch(View currentCluster, int direction)`
`void`	`layout(int l, int t, int r, int b)`
`final void`	`measure(int widthMeasureSpec, int heightMeasureSpec)`
`static int[]`	`mergeDrawableStates(int[] baseState, int[] additionalState)`
`void`	`offsetLeftAndRight(int offset)`
`void`	`offsetTopAndBottom(int offset)`
`void`	`onAnimationEnd()`
`void`	`onAnimationStart()`
`WindowInsets`	`onApplyWindowInsets(WindowInsets insets)`
`void`	`onAttachedToWindow()`
`void`	`onCancelPendingInputEvents()`
`boolean`	`onCapturedPointerEvent(MotionEvent event)`
`boolean`	`onCheckIsTextEditor()`
`void`	`onConfigurationChanged(Configuration newConfig)`
`void`	`onCreateContextMenu(ContextMenu menu)`
`int[]`	`onCreateDrawableState(int extraSpace)`
`InputConnection`	`onCreateInputConnection(EditorInfo outAttrs)`
`void`	`onCreateViewTranslationRequest( int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector )`
`void`	`onCreateVirtualViewTranslationRequests( long[] virtualIds, int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector )`
`void`	`onDetachedFromWindow()`
`void`	`onDisplayHint(int hint)`
`boolean`	`onDragEvent(DragEvent event)`
`void`	`onDraw(Canvas canvas)`
`void`	`onDrawForeground(Canvas canvas)`
`final void`	`onDrawScrollBars(Canvas canvas)`
`boolean`	`onFilterTouchEventForSecurity(MotionEvent event)`
`void`	`onFinishInflate()`
`void`	`onFinishTemporaryDetach()`
`void`	`onFocusChanged( boolean gainFocus, int direction, Rect previouslyFocusedRect )`
`boolean`	`onGenericMotionEvent(MotionEvent event)`
`void`	`onHoverChanged(boolean hovered)`
`boolean`	`onHoverEvent(MotionEvent event)`
`void`	`onInitializeAccessibilityEvent(AccessibilityEvent event)`
`void`	`onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)`
`boolean`	`onKeyDown(int keyCode, KeyEvent event)`
`boolean`	`onKeyLongPress(int keyCode, KeyEvent event)`
`boolean`	`onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)`
`boolean`	`onKeyPreIme(int keyCode, KeyEvent event)`
`boolean`	`onKeyShortcut(int keyCode, KeyEvent event)`
`boolean`	`onKeyUp(int keyCode, KeyEvent event)`
`void`	`onLayout(boolean changed, int left, int top, int right, int bottom)`
`void`	`onMeasure(int widthMeasureSpec, int heightMeasureSpec)`
`void`	`onOverScrolled( int scrollX, int scrollY, boolean clampedX, boolean clampedY )`
`void`	`onPointerCaptureChange(boolean hasCapture)`
`void`	`onPopulateAccessibilityEvent(AccessibilityEvent event)`
`void`	`onProvideAutofillStructure(ViewStructure structure, int flags)`
`void`	`onProvideAutofillVirtualStructure(ViewStructure structure, int flags)`
`void`	`onProvideContentCaptureStructure(ViewStructure structure, int flags)`
`void`	`onProvideStructure(ViewStructure structure)`
`void`	`onProvideVirtualStructure(ViewStructure structure)`
`ContentInfo`	`onReceiveContent(ContentInfo payload)`
`PointerIcon`	`onResolvePointerIcon(MotionEvent event, int pointerIndex)`
`void`	`onRestoreInstanceState(Parcelable state)`
`void`	`onRtlPropertiesChanged(int layoutDirection)`
`Parcelable`	`onSaveInstanceState()`
`void`	`onScreenStateChanged(int screenState)`
`void`	`onScrollCaptureSearch( Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets )`
`void`	`onScrollChanged(int l, int t, int oldl, int oldt)`
`boolean`	`onSetAlpha(int alpha)`
`void`	`onSizeChanged(int w, int h, int oldw, int oldh)`
`void`	`onStartTemporaryDetach()`
`boolean`	`onTouchEvent(MotionEvent event)`
`boolean`	`onTrackballEvent(MotionEvent event)`
`void`	`onViewTranslationResponse(ViewTranslationResponse response)`
`void`	`onVirtualViewTranslationResponses( LongSparseArray<ViewTranslationResponse> response )`
`void`	`onVisibilityAggregated(boolean isVisible)`
`void`	`onVisibilityChanged(View changedView, int visibility)`
`void`	`onWindowFocusChanged(boolean hasWindowFocus)`
`void`	`onWindowSystemUiVisibilityChanged(int visible)` This method is deprecated.
`void`	`onWindowVisibilityChanged(int visibility)`
`boolean`	`overScrollBy( int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent )`
`boolean`	`performAccessibilityAction(int action, Bundle arguments)`
`boolean`	`performClick()`
`boolean`	`performContextClick()`
`boolean`	`performHapticFeedback(HapticFeedbackRequest request)`
`boolean`	`performLongClick()`
`ContentInfo`	`performReceiveContent(ContentInfo payload)`
`void`	`playSoundEffect(int soundConstant)`
`boolean`	`post(Runnable action)`
`boolean`	`postDelayed(Runnable action, long delayMillis)`
`void`	`postInvalidate()`
`void`	`postInvalidateDelayed(long delayMilliseconds)`
`void`	`postInvalidateOnAnimation()`
`void`	`postOnAnimation(Runnable action)`
`void`	`postOnAnimationDelayed(Runnable action, long delayMillis)`
`void`	`refreshDrawableState()`
`static void`	`registerCalledFromWrongThreadListener( View.CalledFromWrongThreadListener listener )`
`void`	`releasePointerCapture()`
`boolean`	`removeCallbacks(Runnable action)`
`void`	`removeOnAttachStateChangeListener( View.OnAttachStateChangeListener listener )`
`void`	`removeOnLayoutChangeListener(View.OnLayoutChangeListener listener)`
`void`	`removeOnUnhandledKeyEventListener( View.OnUnhandledKeyEventListener listener )`
`void`	`reportAppJankStats(AppJankStats appJankStats)`
`void`	`requestApplyInsets()`
`void`	`requestFitSystemWindows()` This method is deprecated.
`final boolean`	`requestFocus()`
`final boolean`	`requestFocusFromTouch()`
`void`	`requestLayout()`
`void`	`requestPointerCapture()`
`boolean`	`requestRectangleOnScreen(Rect rectangle)`
`final void`	`requestUnbufferedDispatch(MotionEvent event)`
`final T`	`<T extends View> requireViewById(int id)`
`void`	`resetPivot()`
`static int`	`resolveSize(int size, int measureSpec)`
`static int`	`resolveSizeAndState(int size, int measureSpec, int childMeasuredState)`
`boolean`	`restoreDefaultFocus()`
`void`	`restoreHierarchyState(SparseArray<Parcelable> container)`
`final void`	`saveAttributeDataForStyleable( Context context, int[] styleable, AttributeSet attrs, TypedArray t, int defStyleAttr, int defStyleRes )`
`void`	`saveHierarchyState(SparseArray<Parcelable> container)`
`void`	`scheduleDrawable(Drawable who, Runnable what, long when)`
`void`	`scrollBy(int x, int y)`
`void`	`scrollTo(int x, int y)`
`void`	`sendAccessibilityEvent(int eventType)`
`void`	`sendAccessibilityEventUnchecked(AccessibilityEvent event)`
`void`	`setAccessibilityDataSensitive(int accessibilityDataSensitive)`
`void`	`setAccessibilityDelegate(View.AccessibilityDelegate delegate)`
`void`	`setAccessibilityHeading(boolean isHeading)`
`void`	`setAccessibilityLiveRegion(int mode)`
`void`	`setAccessibilityPaneTitle(CharSequence accessibilityPaneTitle)`
`void`	`setAccessibilityTraversalAfter(int afterId)`
`void`	`setAccessibilityTraversalBefore(int beforeId)`
`void`	`setActivated(boolean activated)`
`void`	`setAllowClickWhenDisabled(boolean clickableWhenDisabled)`
`void`	`setAllowedHandwritingDelegatePackage(String allowedPackageName)`
`void`	`setAllowedHandwritingDelegatorPackage(String allowedPackageName)`
`void`	`setAlpha(float alpha)`
`void`	`setAnimation(Animation animation)`
`void`	`setAnimationMatrix(Matrix matrix)`
`void`	`setAutoHandwritingEnabled(boolean enabled)`
`void`	`setAutofillHints(String[] autofillHints)`
`void`	`setAutofillId(AutofillId id)`
`void`	`setBackground(Drawable background)`
`void`	`setBackgroundColor(int color)`
`void`	`setBackgroundDrawable(Drawable background)` This method is deprecated.
`void`	`setBackgroundResource(int resid)`
`void`	`setBackgroundTintBlendMode(BlendMode blendMode)`
`void`	`setBackgroundTintList(ColorStateList tint)`
`void`	`setBackgroundTintMode(PorterDuff.Mode tintMode)`
`final void`	`setBottom(int bottom)`
`void`	`setCameraDistance(float distance)`
`void`	`setClickable(boolean clickable)`
`void`	`setClipBounds(Rect clipBounds)`
`void`	`setClipToOutline(boolean clipToOutline)`
`void`	`setContentCaptureSession(ContentCaptureSession contentCaptureSession)`
`void`	`setContentDescription(CharSequence contentDescription)`
`final void`	`setContentSensitivity(int mode)`
`void`	`setContextClickable(boolean contextClickable)`
`void`	`setDefaultFocusHighlightEnabled(boolean defaultFocusHighlightEnabled)`
`void`	`setDrawingCacheBackgroundColor(int color)` This method is deprecated.
`void`	`setDrawingCacheEnabled(boolean enabled)` This method is deprecated.
`void`	`setDrawingCacheQuality(int quality)` This method is deprecated.
`void`	`setDuplicateParentStateEnabled(boolean enabled)`
`void`	`setElevation(float elevation)`
`void`	`setEnabled(boolean enabled)`
`void`	`setFadingEdgeLength(int length)`
`void`	`setFilterTouchesWhenObscured(boolean enabled)`
`void`	`setFitsSystemWindows(boolean fitSystemWindows)`
`void`	`setFocusable(boolean focusable)`
`void`	`setFocusableInTouchMode(boolean focusableInTouchMode)`
`void`	`setFocusedByDefault(boolean isFocusedByDefault)`
`void`	`setForceDarkAllowed(boolean allow)`
`void`	`setForeground(Drawable foreground)`
`void`	`setForegroundGravity(int gravity)`
`void`	`setForegroundTintBlendMode(BlendMode blendMode)`
`void`	`setForegroundTintList(ColorStateList tint)`
`void`	`setForegroundTintMode(PorterDuff.Mode tintMode)`
`void`	`setFrameContentVelocity(float pixelsPerSecond)`
`void`	`setHandwritingBoundsOffsets( float offsetLeft, float offsetTop, float offsetRight, float offsetBottom )`
`void`	`setHandwritingDelegateFlags(int flags)`
`void`	`setHandwritingDelegatorCallback(Runnable callback)`
`void`	`setHapticFeedbackEnabled(boolean hapticFeedbackEnabled)`
`void`	`setHasTransientState(boolean hasTransientState)`
`void`	`setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)`
`void`	`setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled)`
`void`	`setHorizontalScrollbarThumbDrawable(Drawable drawable)`
`void`	`setHorizontalScrollbarTrackDrawable(Drawable drawable)`
`void`	`setHovered(boolean hovered)`
`void`	`setId(int id)`
`void`	`setImportantForAccessibility(int mode)`
`void`	`setImportantForAutofill(int mode)`
`void`	`setImportantForContentCapture(int mode)`
`void`	`setIsCredential(boolean isCredential)` This method is deprecated.
`void`	`setIsHandwritingDelegate(boolean isHandwritingDelegate)`
`void`	`setKeepScreenOn(boolean keepScreenOn)`
`void`	`setKeyboardNavigationCluster(boolean isCluster)`
`void`	`setLabelFor(int id)`
`void`	`setLayerPaint(Paint paint)`
`void`	`setLayerType(int layerType, Paint paint)`
`void`	`setLayoutDirection(int layoutDirection)`
`void`	`setLayoutParams(ViewGroup.LayoutParams params)`
`final void`	`setLeft(int left)`
`final void`	`setLeftTopRightBottom(int left, int top, int right, int bottom)`
`void`	`setLongClickable(boolean longClickable)`
`final void`	`setMeasuredDimension(int measuredWidth, int measuredHeight)`
`void`	`setMinimumHeight(int minHeight)`
`void`	`setMinimumWidth(int minWidth)`
`void`	`setNestedScrollingEnabled(boolean enabled)`
`void`	`setNextClusterForwardId(int nextClusterForwardId)`
`void`	`setNextFocusDownId(int nextFocusDownId)`
`void`	`setNextFocusForwardId(int nextFocusForwardId)`
`void`	`setNextFocusLeftId(int nextFocusLeftId)`
`void`	`setNextFocusRightId(int nextFocusRightId)`
`void`	`setNextFocusUpId(int nextFocusUpId)`
`void`	`setOnApplyWindowInsetsListener( View.OnApplyWindowInsetsListener listener )`
`void`	`setOnCapturedPointerListener(View.OnCapturedPointerListener l)`
`void`	`setOnClickListener(View.OnClickListener l)`
`void`	`setOnContextClickListener(View.OnContextClickListener l)`
`void`	`setOnCreateContextMenuListener(View.OnCreateContextMenuListener l)`
`void`	`setOnDragListener(View.OnDragListener l)`
`void`	`setOnFocusChangeListener(View.OnFocusChangeListener l)`
`void`	`setOnGenericMotionListener(View.OnGenericMotionListener l)`
`void`	`setOnHoverListener(View.OnHoverListener l)`
`void`	`setOnKeyListener(View.OnKeyListener l)`
`void`	`setOnLongClickListener(View.OnLongClickListener l)`
`void`	`setOnReceiveContentListener( String[] mimeTypes, OnReceiveContentListener listener )`
`void`	`setOnScrollChangeListener(View.OnScrollChangeListener l)`
`void`	`setOnSystemUiVisibilityChangeListener( View.OnSystemUiVisibilityChangeListener l )` This method is deprecated.
`void`	`setOnTouchListener(View.OnTouchListener l)`
`void`	`setOutlineAmbientShadowColor(int color)`
`void`	`setOutlineProvider(ViewOutlineProvider provider)`
`void`	`setOutlineSpotShadowColor(int color)`
`void`	`setOverScrollMode(int overScrollMode)`
`void`	`setPadding(int left, int top, int right, int bottom)`
`void`	`setPaddingRelative(int start, int top, int end, int bottom)`
`void`	`setPendingCredentialRequest( GetCredentialRequest request, OutcomeReceiver<GetCredentialResponse, GetCredentialException> callback )`
`void`	`setPivotX(float pivotX)`
`void`	`setPivotY(float pivotY)`
`void`	`setPointerIcon(PointerIcon pointerIcon)`
`final void`	`setPreferKeepClear(boolean preferKeepClear)`
`final void`	`setPreferKeepClearRects(List<Rect> rects)`
`void`	`setPressed(boolean pressed)`
`void`	`setRenderEffect(RenderEffect renderEffect)`
`void`	`setRequestedFrameRate(float frameRate)`
`final void`	`setRevealOnFocusHint(boolean revealOnFocus)`
`final void`	`setRight(int right)`
`void`	`setRotation(float rotation)`
`void`	`setRotationX(float rotationX)`
`void`	`setRotationY(float rotationY)`
`void`	`setSaveEnabled(boolean enabled)`
`void`	`setSaveFromParentEnabled(boolean enabled)`
`void`	`setScaleX(float scaleX)`
`void`	`setScaleY(float scaleY)`
`void`	`setScreenReaderFocusable(boolean screenReaderFocusable)`
`void`	`setScrollBarDefaultDelayBeforeFade( int scrollBarDefaultDelayBeforeFade )`
`void`	`setScrollBarFadeDuration(int scrollBarFadeDuration)`
`void`	`setScrollBarSize(int scrollBarSize)`
`void`	`setScrollBarStyle(int style)`
`final void`	`setScrollCaptureCallback(ScrollCaptureCallback callback)`
`void`	`setScrollCaptureHint(int hint)`
`void`	`setScrollContainer(boolean isScrollContainer)`
`void`	`setScrollIndicators(int indicators)`
`void`	`setScrollX(int value)`
`void`	`setScrollY(int value)`
`void`	`setScrollbarFadingEnabled(boolean fadeScrollbars)`
`void`	`setSelected(boolean selected)`
`void`	`setSoundEffectsEnabled(boolean soundEffectsEnabled)`
`void`	`setStateDescription(CharSequence stateDescription)`
`void`	`setStateListAnimator(StateListAnimator stateListAnimator)`
`void`	`setSupplementalDescription(CharSequence supplementalDescription)`
`void`	`setSystemGestureExclusionRects(List<Rect> rects)`
`void`	`setSystemUiVisibility(int visibility)` This method is deprecated.
`void`	`setTag(int key, Object tag)`
`void`	`setTextAlignment(int textAlignment)`
`void`	`setTextDirection(int textDirection)`
`void`	`setTooltipText(CharSequence tooltipText)`
`final void`	`setTop(int top)`
`void`	`setTouchDelegate(TouchDelegate delegate)`
`void`	`setTransitionAlpha(float alpha)`
`final void`	`setTransitionName(String transitionName)`
`void`	`setTransitionVisibility(int visibility)`
`void`	`setTranslationX(float translationX)`
`void`	`setTranslationY(float translationY)`
`void`	`setTranslationZ(float translationZ)`
`void`	`setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled)`
`void`	`setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled)`
`void`	`setVerticalScrollbarPosition(int position)`
`void`	`setVerticalScrollbarThumbDrawable(Drawable drawable)`
`void`	`setVerticalScrollbarTrackDrawable(Drawable drawable)`
`void`	`setViewTranslationCallback(ViewTranslationCallback callback)`
`void`	`setVisibility(int visibility)`
`void`	`setWillNotCacheDrawing(boolean willNotCacheDrawing)` This method is deprecated.
`void`	`setWillNotDraw(boolean willNotDraw)`
`void`	`setWindowInsetsAnimationCallback( WindowInsetsAnimation.Callback callback )`
`void`	`setX(float x)`
`void`	`setY(float y)`
`void`	`setZ(float z)`
`boolean`	`showContextMenu()`
`ActionMode`	`startActionMode(ActionMode.Callback callback)`
`void`	`startAnimation(Animation animation)`
`final boolean`	`startDrag( ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags )` This method is deprecated.
`final boolean`	`startDragAndDrop( ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags )`
`boolean`	`startNestedScroll(int axes)`
`void`	`stopNestedScroll()`
`String`	`toString()`
`void`	`transformMatrixToGlobal(Matrix matrix)`
`void`	`transformMatrixToLocal(Matrix matrix)`
`static void`	`unregisterCalledFromWrongThreadListener( View.CalledFromWrongThreadListener listener )`
`void`	`unscheduleDrawable(Drawable who)`
`final void`	`updateDragShadow(View.DragShadowBuilder shadowBuilder)`
`boolean`	`verifyDrawable(Drawable who)`
`boolean`	`willNotCacheDrawing()` This method is deprecated.
`boolean`	`willNotDraw()`

From androidx.constraintlayout.widget.VirtualLayout

`void`	`applyLayoutFeaturesInConstraintSet(ConstraintLayout container)`
`void`	`onAttachedToWindow()`
`void`	`setElevation(float elevation)`
`void`	`setVisibility(int visibility)`

Constants

CHAIN_PACKED

Added in 2.2.2

public static final int CHAIN_PACKED = 2

CHAIN_SPREAD

Added in 2.2.2

public static final int CHAIN_SPREAD = 0

CHAIN_SPREAD_INSIDE

Added in 2.2.2

public static final int CHAIN_SPREAD_INSIDE = 1

HORIZONTAL

Added in 2.2.2

public static final int HORIZONTAL = 0

HORIZONTAL_ALIGN_CENTER

Added in 2.2.2

public static final int HORIZONTAL_ALIGN_CENTER = 2

HORIZONTAL_ALIGN_END

Added in 2.2.2

public static final int HORIZONTAL_ALIGN_END = 1

HORIZONTAL_ALIGN_START

Added in 2.2.2

public static final int HORIZONTAL_ALIGN_START = 0

VERTICAL

Added in 2.2.2

public static final int VERTICAL = 1

VERTICAL_ALIGN_BASELINE

Added in 2.2.2

public static final int VERTICAL_ALIGN_BASELINE = 3

VERTICAL_ALIGN_BOTTOM

Added in 2.2.2

public static final int VERTICAL_ALIGN_BOTTOM = 1

VERTICAL_ALIGN_CENTER

Added in 2.2.2

public static final int VERTICAL_ALIGN_CENTER = 2

VERTICAL_ALIGN_TOP

Added in 2.2.2

public static final int VERTICAL_ALIGN_TOP = 0

WRAP_ALIGNED

Added in 2.2.2

public static final int WRAP_ALIGNED = 2

WRAP_CHAIN

Added in 2.2.2

public static final int WRAP_CHAIN = 1

WRAP_NONE

Added in 2.2.2

public static final int WRAP_NONE = 0

Public constructors

Flow

Added in 2.2.2

public Flow(Context context)

Flow

Added in 2.2.2

public Flow(Context context, AttributeSet attrs)

Flow

Added in 2.2.2

public Flow(Context context, AttributeSet attrs, int defStyleAttr)

Public methods

public void loadParameters(
    ConstraintSet.Constraint constraint,
    HelperWidget child,
    ConstraintLayout.LayoutParams layoutParams,
    SparseArray<ConstraintWidget> mapIdToWidget
)

Parameters
`ConstraintSet.Constraint constraint`
`HelperWidget child`
`ConstraintLayout.LayoutParams layoutParams`
`SparseArray<ConstraintWidget> mapIdToWidget`

onMeasure

public void onMeasure(
    VirtualLayout layout,
    int widthMeasureSpec,
    int heightMeasureSpec
)

Parameters
`VirtualLayout layout`
`int widthMeasureSpec`
`int heightMeasureSpec`

resolveRtl

public void resolveRtl(ConstraintWidget widget, boolean isRtl)

Parameters
`ConstraintWidget widget`
`boolean isRtl`

setFirstHorizontalBias

Added in 2.2.2

public void setFirstHorizontalBias(float bias)

Similar to setHorizontalBias(), but only applied to the first chain.

Parameters
`float bias`

setFirstHorizontalStyle

Added in 2.2.2

public void setFirstHorizontalStyle(int style)

Similar to setHorizontalStyle(), but only applies to the first chain.

Parameters
`int style`

setFirstVerticalBias

Added in 2.2.2

public void setFirstVerticalBias(float bias)

Similar to setVerticalBias(), but only applied to the first chain.

Parameters
`float bias`

setFirstVerticalStyle

Added in 2.2.2

public void setFirstVerticalStyle(int style)

Similar to setVerticalStyle(), but only applies to the first chain.

Parameters
`int style`

setHorizontalAlign

Added in 2.2.2

public void setHorizontalAlign(int align)

Set up the horizontal alignment of the elements in the layout, if the layout orientation is set to Flow.VERTICAL Can be either: Flow.HORIZONTAL_ALIGN_START Flow.HORIZONTAL_ALIGN_END Flow.HORIZONTAL_ALIGN_CENTER

Parameters
`int align`

setHorizontalBias

Added in 2.2.2

public void setHorizontalBias(float bias)

Set the horizontal bias applied to the chain

Parameters
`float bias`	from 0 to 1

setHorizontalGap

Added in 2.2.2

public void setHorizontalGap(int gap)

Set up the horizontal gap between elements

Parameters
`int gap`

setHorizontalStyle

Added in 2.2.2

public void setHorizontalStyle(int style)

Set horizontal chain style. Can be: Flow.CHAIN_SPREAD Flow.CHAIN_SPREAD_INSIDE Flow.CHAIN_PACKED

Parameters
`int style`

setLastHorizontalBias

Added in 2.2.2

public void setLastHorizontalBias(float bias)

Set the bias of the last Horizontal column.

Parameters
`float bias`

setLastHorizontalStyle

Added in 2.2.2

public void setLastHorizontalStyle(int style)

Set the style of the last Horizontal column.

Parameters
`int style`	Flow.CHAIN_SPREAD, Flow.CHAIN_SPREAD_INSIDE, or Flow.CHAIN_PACKED

setLastVerticalBias

Added in 2.2.2

public void setLastVerticalBias(float bias)

Set the bias of the last vertical row.

Parameters
`float bias`

setLastVerticalStyle

Added in 2.2.2

public void setLastVerticalStyle(int style)

Set the style of the last vertical row.

Parameters
`int style`	Flow.CHAIN_SPREAD, Flow.CHAIN_SPREAD_INSIDE, or Flow.CHAIN_PACKED

setMaxElementsWrap

Added in 2.2.2

public void setMaxElementsWrap(int max)

Set up the maximum number of elements before wrapping.

Parameters
`int max`

setOrientation

Added in 2.2.2

public void setOrientation(int orientation)

Set the orientation of the layout

Parameters
`int orientation`	either Flow.HORIZONTAL or FLow.VERTICAL

setPadding

Added in 2.2.2

public void setPadding(int padding)

Set padding around the content

Parameters
`int padding`

setPaddingBottom

Added in 2.2.2

public void setPaddingBottom(int paddingBottom)

Set padding bottom around the content

Parameters
`int paddingBottom`

setPaddingLeft

Added in 2.2.2

public void setPaddingLeft(int paddingLeft)

Set padding left around the content

Parameters
`int paddingLeft`

setPaddingRight

Added in 2.2.2

public void setPaddingRight(int paddingRight)

Set padding right around the content

Parameters
`int paddingRight`

setPaddingTop

Added in 2.2.2

public void setPaddingTop(int paddingTop)

Set padding top around the content

Parameters
`int paddingTop`

setVerticalAlign

Added in 2.2.2

public void setVerticalAlign(int align)

Set up the vertical alignment of the elements in the layout, if the layout orientation is set to Flow.HORIZONTAL Can be either: Flow.VERTICAL_ALIGN_TOP Flow.VERTICAL_ALIGN_BOTTOM Flow.VERTICAL_ALIGN_CENTER Flow.VERTICAL_ALIGN_BASELINE

Parameters
`int align`

setVerticalBias

Added in 2.2.2

public void setVerticalBias(float bias)

Set the vertical bias applied to the chain

Parameters
`float bias`	from 0 to 1

setVerticalGap

Added in 2.2.2

public void setVerticalGap(int gap)

Set up the vertical gap between elements

Parameters
`int gap`

setVerticalStyle

Added in 2.2.2

public void setVerticalStyle(int style)

Set vertical chain style. Can be: Flow.CHAIN_SPREAD Flow.CHAIN_SPREAD_INSIDE Flow.CHAIN_PACKED

Parameters
`int style`

setWrapMode

Added in 2.2.2

public void setWrapMode(int mode)

Set wrap mode for the layout. Can be: Flow.WRAP_NONE (default) -- no wrap behavior, create a single chain Flow.WRAP_CHAIN -- if not enough space to fit the referenced elements, will create additional chains after the first one Flow.WRAP_ALIGNED -- if not enough space to fit the referenced elements, will wrap the elements, keeping them aligned (like a table)

Parameters
`int mode`

Protected methods

init

protected void init(AttributeSet attrs)

Parameters
`AttributeSet attrs`

onMeasure

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)