public class Flow extends VirtualLayout


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
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int

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

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

void

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

void

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

void

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

Set up the horizontal gap between elements

void
setHorizontalStyle(int style)

Set horizontal chain style.

void

Set the bias of the last Horizontal column.

void

Set the style of the last Horizontal column.

void
setLastVerticalBias(float bias)

Set the bias of the last vertical row.

void

Set the style of the last vertical row.

void

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
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
static final int
static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final int
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
static final String
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE = "creditCardSecurityCode"
static final String
static final String
static final String
static final String
static final String
static final String
static final String
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int
static final int
static final int
static final int
static final int
static final int
static final int[]
static final int[]
static final int[]
static final int[]
static final int
static final int
static final int
static final int
static final int
static final int
static final int
GONE = 8
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
KEEP_SCREEN_ON = 67108864
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
NO_ID = -1
static final int
static final int
static final int
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int[]
static final int[]
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final String
VIEW_LOG_TAG = "View"
static final int
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>

Inherited methods

From androidx.constraintlayout.widget.ConstraintHelper
void
addView(View view)

Add a view to the helper.

void

hook for helpers to apply parameters in MotionLayout

void
void
boolean
containsId(int id)

does id table contain the id

int[]

Helpers typically reference a collection of ids

View[]
int
indexFromId(int id)

find the position of an id

static boolean
void
int

Remove a given view from the helper.

void
setIds(String idList)
void
void
setReferencedIds(int[] ids)

Helpers typically reference a collection of ids

void
setTag(int key, Object tag)
void

update after constraints are resolved

void

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

void
void

called before the draw

void

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

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

From android.view.View
void
void
addExtraDataToAccessibilityNodeInfo(
    AccessibilityNodeInfo info,
    String extraDataKey,
    Bundle arguments
)
void
addFocusables(ArrayList<View> views, int direction)
void
void
void
void
void
ViewPropertyAnimator
void
void
boolean
void
void

This method is deprecated.

void
boolean
boolean
boolean
boolean
boolean
canScrollHorizontally(int direction)
boolean
canScrollVertically(int direction)
final void
void
final void
boolean
void
void
void
static int
combineMeasuredStates(int curState, int newState)
int
int
int
void
WindowInsets
int
int
int
AccessibilityNodeInfo
void
void

This method is deprecated.

WindowInsets
boolean
void
void
dispatchCreateViewTranslationRequest(
    Map<AutofillId, long[]> viewIds,
    int[] supportedFormats,
    TranslationCapability capability,
    List<ViewTranslationRequest> requests
)
void
boolean
void
void
dispatchDrawableHotspotChanged(float x, float y)
void
boolean
boolean
boolean
boolean
boolean
boolean
boolean
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
void
void
void
void
void
dispatchScrollCaptureSearch(
    Rect localVisibleRect,
    Point windowOffset,
    Consumer<ScrollCaptureTarget> targets
)
void
dispatchSetActivated(boolean activated)
void
dispatchSetPressed(boolean pressed)
void
dispatchSetSelected(boolean selected)
void
void

This method is deprecated.

boolean
boolean
boolean
dispatchUnhandledMove(View focused, int direction)
void
dispatchVisibilityChanged(View changedView, int visibility)
void
dispatchWindowFocusChanged(boolean hasFocus)
void
void
WindowInsets
WindowInsetsAnimation.Bounds
void

This method is deprecated.

void
void
draw(Canvas canvas)
void
drawableHotspotChanged(float x, float y)
void
View
final OnBackInvokedDispatcher
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

This method is deprecated.

View
focusSearch(int direction)
void
forceHasOverlappingRendering(boolean hasOverlappingRendering)
void
boolean
void
generateDisplayHash(
    String hashAlgorithm,
    Rect bounds,
    Executor executor,
    DisplayHashResultCallback callback
)
static int
CharSequence
View.AccessibilityDelegate
int
AccessibilityNodeProvider
CharSequence
int
int
String
String
float
Animation
Matrix
IBinder
int[]
Map<IntegerInteger>
String[]
final AutofillId
int
AutofillValue
Drawable
BlendMode
ColorStateList
PorterDuff.Mode
int
final int
float
int
float
Rect
boolean
final boolean
final ContentCaptureSession
CharSequence
final Context
ContextMenu.ContextMenuInfo
final boolean
static int
getDefaultSize(int size, int measureSpec)
Display
final int[]
Bitmap

This method is deprecated.

int

This method is deprecated.

int

This method is deprecated.

void
long
float
int
boolean
boolean
int
ArrayList<View>
getFocusables(int direction)
void
Drawable
int
BlendMode
ColorStateList
PorterDuff.Mode
boolean
getGlobalVisibleRect(Rect r, Point globalOffset)
Handler
float
float
float
float
Runnable
final boolean
final int
void
getHitRect(Rect outRect)
int
int
Drawable
Drawable
int
int
int
int
boolean
KeyEvent.DispatcherState
int
int
int
ViewGroup.LayoutParams
final int
float
int
final boolean
void
getLocationInSurface(int[] location)
void
getLocationInWindow(int[] outLocation)
void
getLocationOnScreen(int[] outLocation)
Matrix
final int
final int
final int
final int
final int
int
int
int
int
int
int
int
int
View.OnFocusChangeListener
int
ViewOutlineProvider
int
int
ViewOverlay
int
int
int
int
int
int
final ViewParent
ViewParent
float
float
PointerIcon
final List<Rect>
String[]
Resources
final boolean
final int
float
int
AttachedSurfaceControl
View
WindowInsets
float
float
float
float
float
int
int
int
int
int
int
final int
final int
int
int
final CharSequence
StateListAnimator
int
int
List<Rect>
int

This method is deprecated.

Object
int
int
CharSequence
final int
float
int
TouchDelegate
ArrayList<View>
float
String
float
float
float
long
int
int
Drawable
Drawable
int
ViewTranslationResponse
ViewTreeObserver
int
final int
int
WindowId
WindowInsetsController
int

This method is deprecated.

IBinder
int
void
float
float
float
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
static View
inflate(Context context, int resource, ViewGroup root)
void

This method is deprecated.

void
void
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean

This method is deprecated.

boolean
boolean
final boolean
final boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
final boolean
final boolean
boolean
boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
boolean
boolean
final boolean
boolean
boolean
final boolean
boolean
boolean
boolean
boolean
boolean
void
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
void
WindowInsets
void
void
boolean
boolean
void
void
int[]
onCreateDrawableState(int extraSpace)
InputConnection
void
onCreateViewTranslationRequest(
    int[] supportedFormats,
    Consumer<ViewTranslationRequest> requestsCollector
)
void
onCreateVirtualViewTranslationRequests(
    long[] virtualIds,
    int[] supportedFormats,
    Consumer<ViewTranslationRequest> requestsCollector
)
void
void
onDisplayHint(int hint)
boolean
void
onDraw(Canvas canvas)
void
final void
boolean
void
void
void
onFocusChanged(
    boolean gainFocus,
    int direction,
    Rect previouslyFocusedRect
)
boolean
void
onHoverChanged(boolean hovered)
boolean
void
void
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
void
onProvideAutofillStructure(ViewStructure structure, int flags)
void
void
void
void
ContentInfo
PointerIcon
onResolvePointerIcon(MotionEvent event, int pointerIndex)
void
void
onRtlPropertiesChanged(int layoutDirection)
Parcelable
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
boolean
boolean
void
void
void
onVisibilityAggregated(boolean isVisible)
void
onVisibilityChanged(View changedView, int visibility)
void
onWindowFocusChanged(boolean hasWindowFocus)
void

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
boolean
performContextClick(float x, float y)
boolean
performHapticFeedback(int feedbackConstant)
boolean
ContentInfo
void
playSoundEffect(int soundConstant)
boolean
post(Runnable action)
boolean
postDelayed(Runnable action, long delayMillis)
void
void
postInvalidateDelayed(long delayMilliseconds)
void
void
void
postOnAnimationDelayed(Runnable action, long delayMillis)
void
void
boolean
void
void
void
void
void

This method is deprecated.

final boolean
final boolean
void
void
boolean
final void
final T
<T extends View> requireViewById(int id)
void
static int
resolveSize(int size, int measureSpec)
static int
resolveSizeAndState(int size, int measureSpec, int childMeasuredState)
boolean
void
final void
saveAttributeDataForStyleable(
    Context context,
    int[] styleable,
    AttributeSet attrs,
    TypedArray t,
    int defStyleAttr,
    int defStyleRes
)
void
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
void
setAccessibilityDataSensitive(int accessibilityDataSensitive)
void
void
setAccessibilityHeading(boolean isHeading)
void
void
setAccessibilityPaneTitle(CharSequence accessibilityPaneTitle)
void
void
void
setActivated(boolean activated)
void
setAllowClickWhenDisabled(boolean clickableWhenDisabled)
void
void
void
setAlpha(float alpha)
void
void
void
setAutoHandwritingEnabled(boolean enabled)
void
setAutofillHints(String[] autofillHints)
void
void
setBackground(Drawable background)
void
setBackgroundColor(int color)
void

This method is deprecated.

void
void
void
void
final void
setBottom(int bottom)
void
setCameraDistance(float distance)
void
setClickable(boolean clickable)
void
setClipBounds(Rect clipBounds)
void
setClipToOutline(boolean clipToOutline)
void
void
setContentDescription(CharSequence contentDescription)
void
setContextClickable(boolean contextClickable)
void
setDefaultFocusHighlightEnabled(boolean defaultFocusHighlightEnabled)
void

This method is deprecated.

void
setDrawingCacheEnabled(boolean enabled)

This method is deprecated.

void

This method is deprecated.

void
void
setElevation(float elevation)
void
setEnabled(boolean enabled)
void
setFadingEdgeLength(int length)
void
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
void
void
void
setHandwritingBoundsOffsets(
    float offsetLeft,
    float offsetTop,
    float offsetRight,
    float offsetBottom
)
void
void
setHapticFeedbackEnabled(boolean hapticFeedbackEnabled)
void
setHasTransientState(boolean hasTransientState)
void
setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)
void
setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled)
void
void
void
setHovered(boolean hovered)
void
setId(int id)
void
void
void
void
setIsCredential(boolean isCredential)
void
setIsHandwritingDelegate(boolean isHandwritingDelegate)
void
setKeepScreenOn(boolean keepScreenOn)
void
setKeyboardNavigationCluster(boolean isCluster)
void
setLabelFor(int id)
void
void
setLayerType(int layerType, Paint paint)
void
setLayoutDirection(int layoutDirection)
void
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
void
void
void
void
void
void
void
void
void
void
void
setOnReceiveContentListener(
    String[] mimeTypes,
    OnReceiveContentListener listener
)
void
void

This method is deprecated.

void
void
void
void
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
setPivotX(float pivotX)
void
setPivotY(float pivotY)
void
final void
setPreferKeepClear(boolean preferKeepClear)
final void
void
setPressed(boolean pressed)
void
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
void
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
void
void
void
setSystemUiVisibility(int visibility)

This method is deprecated.

void
void
setTextAlignment(int textAlignment)
void
setTextDirection(int textDirection)
void
final void
setTop(int top)
void
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
void
void
void
void
setVisibility(int visibility)
void
setWillNotCacheDrawing(boolean willNotCacheDrawing)

This method is deprecated.

void
setWillNotDraw(boolean willNotDraw)
void
void
setX(float x)
void
setY(float y)
void
setZ(float z)
boolean
ActionMode
void
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
void
String
void
void
void
final void
boolean
boolean

This method is deprecated.

boolean
From androidx.constraintlayout.widget.VirtualLayout
void
void
void
setElevation(float elevation)
void
setVisibility(int visibility)

Constants

CHAIN_PACKED

Added in 2.2.0-alpha13
public static final int CHAIN_PACKED = 2

CHAIN_SPREAD

Added in 2.2.0-alpha13
public static final int CHAIN_SPREAD = 0

CHAIN_SPREAD_INSIDE

Added in 2.2.0-alpha13
public static final int CHAIN_SPREAD_INSIDE = 1

HORIZONTAL

Added in 2.2.0-alpha13
public static final int HORIZONTAL = 0

HORIZONTAL_ALIGN_CENTER

Added in 2.2.0-alpha13
public static final int HORIZONTAL_ALIGN_CENTER = 2

HORIZONTAL_ALIGN_END

Added in 2.2.0-alpha13
public static final int HORIZONTAL_ALIGN_END = 1

HORIZONTAL_ALIGN_START

Added in 2.2.0-alpha13
public static final int HORIZONTAL_ALIGN_START = 0

VERTICAL

Added in 2.2.0-alpha13
public static final int VERTICAL = 1

VERTICAL_ALIGN_BASELINE

Added in 2.2.0-alpha13
public static final int VERTICAL_ALIGN_BASELINE = 3

VERTICAL_ALIGN_BOTTOM

Added in 2.2.0-alpha13
public static final int VERTICAL_ALIGN_BOTTOM = 1

VERTICAL_ALIGN_CENTER

Added in 2.2.0-alpha13
public static final int VERTICAL_ALIGN_CENTER = 2

VERTICAL_ALIGN_TOP

Added in 2.2.0-alpha13
public static final int VERTICAL_ALIGN_TOP = 0

WRAP_ALIGNED

Added in 2.2.0-alpha13
public static final int WRAP_ALIGNED = 2

WRAP_CHAIN

Added in 2.2.0-alpha13
public static final int WRAP_CHAIN = 1

WRAP_NONE

Added in 2.2.0-alpha13
public static final int WRAP_NONE = 0

Public constructors

Flow

Added in 2.2.0-alpha13
public Flow(Context context)

Flow

Added in 2.2.0-alpha13
public Flow(Context context, AttributeSet attrs)

Flow

Added in 2.2.0-alpha13
public Flow(Context context, AttributeSet attrs, int defStyleAttr)

Public methods

loadParameters

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 2.2.0-alpha13
public void setFirstHorizontalBias(float bias)

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

Parameters
float bias

setFirstHorizontalStyle

Added in 2.2.0-alpha13
public void setFirstHorizontalStyle(int style)

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

Parameters
int style

setFirstVerticalBias

Added in 2.2.0-alpha13
public void setFirstVerticalBias(float bias)

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

Parameters
float bias

setFirstVerticalStyle

Added in 2.2.0-alpha13
public void setFirstVerticalStyle(int style)

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

Parameters
int style

setHorizontalAlign

Added in 2.2.0-alpha13
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 2.2.0-alpha13
public void setHorizontalBias(float bias)

Set the horizontal bias applied to the chain

Parameters
float bias

from 0 to 1

setHorizontalGap

Added in 2.2.0-alpha13
public void setHorizontalGap(int gap)

Set up the horizontal gap between elements

Parameters
int gap

setHorizontalStyle

Added in 2.2.0-alpha13
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 2.2.0-alpha13
public void setLastHorizontalBias(float bias)

Set the bias of the last Horizontal column.

Parameters
float bias

setLastHorizontalStyle

Added in 2.2.0-alpha13
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 2.2.0-alpha13
public void setLastVerticalBias(float bias)

Set the bias of the last vertical row.

Parameters
float bias

setLastVerticalStyle

Added in 2.2.0-alpha13
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 2.2.0-alpha13
public void setMaxElementsWrap(int max)

Set up the maximum number of elements before wrapping.

Parameters
int max

setOrientation

Added in 2.2.0-alpha13
public void setOrientation(int orientation)

Set the orientation of the layout

Parameters
int orientation

either Flow.HORIZONTAL or FLow.VERTICAL

setPadding

Added in 2.2.0-alpha13
public void setPadding(int padding)

Set padding around the content

Parameters
int padding

setPaddingBottom

Added in 2.2.0-alpha13
public void setPaddingBottom(int paddingBottom)

Set padding bottom around the content

Parameters
int paddingBottom

setPaddingLeft

Added in 2.2.0-alpha13
public void setPaddingLeft(int paddingLeft)

Set padding left around the content

Parameters
int paddingLeft

setPaddingRight

Added in 2.2.0-alpha13
public void setPaddingRight(int paddingRight)

Set padding right around the content

Parameters
int paddingRight

setPaddingTop

Added in 2.2.0-alpha13
public void setPaddingTop(int paddingTop)

Set padding top around the content

Parameters
int paddingTop

setVerticalAlign

Added in 2.2.0-alpha13
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 2.2.0-alpha13
public void setVerticalBias(float bias)

Set the vertical bias applied to the chain

Parameters
float bias

from 0 to 1

setVerticalGap

Added in 2.2.0-alpha13
public void setVerticalGap(int gap)

Set up the vertical gap between elements

Parameters
int gap

setVerticalStyle

Added in 2.2.0-alpha13
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 2.2.0-alpha13
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)