ConstraintSet

Artifact: androidx.constraintlayout:constraintlayout

Added in 2.2.0

Kotlin |Java

class ConstraintSet

Defines a set of constraints to be used with ConstraintLayout.

ConstraintSet enables you create and save constraints and apply them to an existing ConstraintLayout. For details about constraint behaviour, see ConstraintLayout.

ConstraintsSet can be created in various ways:

Manually — c = new ConstraintSet(); c.connect(...);
From an R.layout.* object — c.clone(context, R.layout.layout1);
From a ConstraintLayout — c.clone(constraintLayout);

Example code:

import android.content.Context;
     import android.os.Bundle;
     import android.support.constraint.ConstraintLayout;
     import android.support.constraint.ConstraintSet;
     import android.support.transition.TransitionManager;
     import android.support.v7.app.AppCompatActivity;
     import android.view.View;

     public class MainActivity extends AppCompatActivity {
         ConstraintSet mConstraintSet1 = new ConstraintSet(); // Create a ConstraintSet.
         ConstraintSet mConstraintSet2 = new ConstraintSet(); // Create a ConstraintSet.
         ConstraintLayout mConstraintLayout; // Cache the ConstraintLayout.
         boolean mOld = true;


         protected void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
             Context context = this;
             mConstraintSet2.clone(context, R.layout.state2); // Get constraints from layout.
             setContentView(R.layout.state1);
             mConstraintLayout = (ConstraintLayout) findViewById(R.id.activity_main);
             mConstraintSet1.clone(mConstraintLayout); // Get constraints from ConstraintSet.
         }

         public void foo(View view) {
             TransitionManager.beginDelayedTransition(mConstraintLayout);
             if (mOld = !mOld) {
                 mConstraintSet1.applyTo(mConstraintLayout); // Set new constraints.
             }  else {
                 mConstraintSet2.applyTo(mConstraintLayout); // Set new constraints.
             }
         }
     }

Summary

Nested types
`class ConstraintSet.Constraint`
`class ConstraintSet.Layout`
`class ConstraintSet.Motion`
`class ConstraintSet.PropertySet`
`class ConstraintSet.Transform`

Constants
`const Int`	`BASELINE = 5` The baseline of the text in a view.
`const Int`	`BOTTOM = 4` The bottom side of a view.
`const Int`	`CHAIN_PACKED = 2` Chain packed style
`const Int`	`CHAIN_SPREAD = 0` Chain spread style
`const Int`	`CHAIN_SPREAD_INSIDE = 1` Chain spread inside style
`const Int`	`CIRCLE_REFERENCE = 8` Circle reference from a view.
`const Int`	`END = 7` The right side of a view in left to right languages.
`const Int`	`GONE = 8` This view is gone, and will not take any space for layout purposes.
`const Int`	`HORIZONTAL = 0` The horizontal orientation.
`const Int`	`HORIZONTAL_GUIDELINE = 0` Used to create a horizontal create guidelines.
`const Int`	`INVISIBLE = 4` This view is invisible, but it still takes up space for layout purposes.
`const Int`	`LEFT = 1` The left side of a view.
`const Int`	`MATCH_CONSTRAINT = 0` Dimension will be controlled by constraints
`const Int`	`MATCH_CONSTRAINT_PERCENT = 2`
`const Int`	`MATCH_CONSTRAINT_SPREAD = 0` Calculate the size of a view in 0 dp by reducing the constrains gaps as much as possible
`const Int`	`MATCH_CONSTRAINT_WRAP = 1` How to calculate the size of a view in 0 dp by using its wrap_content size
`const Int`	`PARENT_ID = 0` References the id of the parent.
`const Int`	`RIGHT = 2` The right side of a view.
`const Int`	`ROTATE_LEFT_OF_PORTRATE = 4`
`const Int`	`ROTATE_NONE = 0`
`const Int`	`ROTATE_PORTRATE_OF_LEFT = 2`
`const Int`	`ROTATE_PORTRATE_OF_RIGHT = 1`
`const Int`	`ROTATE_RIGHT_OF_PORTRATE = 3`
`const Int`	`START = 6` The left side of a view in left to right languages.
`const Int`	`TOP = 3` The top of a view.
`const Int`	`UNSET = -1` Used to indicate a parameter is cleared or not set
`const Int`	`VERTICAL = 1` The vertical orientation.
`const Int`	`VERTICAL_GUIDELINE = 1` Used to create a vertical create guidelines. see `create`
`const Int`	`VISIBILITY_MODE_IGNORE = 1`
`const Int`	`VISIBILITY_MODE_NORMAL = 0`
`const Int`	`VISIBLE = 0` This view is visible.
`const Int`	`WRAP_CONTENT = -2` Dimension will set by the view's content

Public constructors
`ConstraintSet()`

Public functions
`Unit`	`addColorAttributes(attributeName: Array<String!>!)` Add attribute of type Color
`Unit`	`addFloatAttributes(attributeName: Array<String!>!)` Add attribute of type float
`Unit`	`addIntAttributes(attributeName: Array<String!>!)` Add attribute of type Int
`Unit`	`addStringAttributes(attributeName: Array<String!>!)` Add attribute of type string
`Unit`	`addToHorizontalChain(viewId: Int, leftId: Int, rightId: Int)` Adds a view to a horizontal chain.
`Unit`	`addToHorizontalChainRTL(viewId: Int, leftId: Int, rightId: Int)` Adds a view to a horizontal chain.
`Unit`	`addToVerticalChain(viewId: Int, topId: Int, bottomId: Int)` Adds a view to a vertical chain.
`Unit`	`applyCustomAttributes(constraintLayout: ConstraintLayout!)` Apply custom attributes alone
`Unit`	`applyDeltaFrom(cs: ConstraintSet!)` Get the delta form the ConstraintSet and aplly to this
`Unit`	`applyTo(constraintLayout: ConstraintLayout!)` Apply the constraints to a ConstraintLayout.
`Unit`	`applyToHelper( helper: ConstraintHelper!, child: ConstraintWidget!, layoutParams: ConstraintLayout.LayoutParams!, mapIdToWidget: SparseArray<ConstraintWidget!>! )` Apply Layout to Helper widget
`Unit`	`applyToLayoutParams(id: Int, layoutParams: ConstraintLayout.LayoutParams!)` Fill in a ConstraintLayout LayoutParam based on the id.
`Unit`	`applyToWithoutCustom(constraintLayout: ConstraintLayout!)` Apply the constraints to a ConstraintLayout.
`java-static ConstraintSet.Constraint!`	`buildDelta(context: Context!, parser: XmlPullParser!)` Used to read a ConstraintDelta
`Unit`	`center( centerID: Int, firstID: Int, firstSide: Int, firstMargin: Int, secondId: Int, secondSide: Int, secondMargin: Int, bias: Float )` Center widget between the other two widgets.
`Unit`	`centerHorizontally(viewId: Int, toView: Int)` Centers the view horizontally relative to toView's position.
`Unit`	`centerHorizontally( centerID: Int, leftId: Int, leftSide: Int, leftMargin: Int, rightId: Int, rightSide: Int, rightMargin: Int, bias: Float )` Centers the widget horizontally to the left and right side on another widgets sides.
`Unit`	`centerHorizontallyRtl(viewId: Int, toView: Int)` Centers the view horizontally relative to toView's position.
`Unit`	`centerHorizontallyRtl( centerID: Int, startId: Int, startSide: Int, startMargin: Int, endId: Int, endSide: Int, endMargin: Int, bias: Float )` Centers the widgets horizontally to the left and right side on another widgets sides.
`Unit`	`centerVertically(viewId: Int, toView: Int)` Centers the view vertically relative to toView's position.
`Unit`	`centerVertically( centerID: Int, topId: Int, topSide: Int, topMargin: Int, bottomId: Int, bottomSide: Int, bottomMargin: Int, bias: Float )` Centers the widgets vertically to the top and bottom side on another widgets sides.
`Unit`	`clear(viewId: Int)` Remove all constraints from this view.
`Unit`	`clear(viewId: Int, anchor: Int)` Remove a constraint from this view.
`Unit`	`clone(constraintLayout: ConstraintLayout!)` Copy the layout parameters of a ConstraintLayout.
`Unit`	`clone(constraints: Constraints!)` Copy the layout parameters of a ConstraintLayout.
`Unit`	`clone(set: ConstraintSet!)` Copy the constraints from a layout.
`Unit`	`clone(context: Context!, constraintLayoutId: Int)` Copy the constraints from a layout.
`Unit`	`connect(startID: Int, startSide: Int, endID: Int, endSide: Int)` Create a constraint between two widgets.
`Unit`	`connect(startID: Int, startSide: Int, endID: Int, endSide: Int, margin: Int)` Create a constraint between two widgets.
`Unit`	`constrainCircle(viewId: Int, id: Int, radius: Int, angle: Float)` Constrain the view on a circle constraint
`Unit`	`constrainDefaultHeight(viewId: Int, height: Int)` Sets how the height is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.
`Unit`	`constrainDefaultWidth(viewId: Int, width: Int)` Sets how the width is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.
`Unit`	`constrainHeight(viewId: Int, height: Int)` Sets the height of the view.
`Unit`	`constrainMaxHeight(viewId: Int, height: Int)` Sets the maximum height of the view.
`Unit`	`constrainMaxWidth(viewId: Int, width: Int)` Sets the maximum width of the view.
`Unit`	`constrainMinHeight(viewId: Int, height: Int)` Sets the height of the view.
`Unit`	`constrainMinWidth(viewId: Int, width: Int)` Sets the width of the view.
`Unit`	`constrainPercentHeight(viewId: Int, percent: Float)` Sets the height of the view as a percentage of the parent.
`Unit`	`constrainPercentWidth(viewId: Int, percent: Float)` Sets the width of the view as a percentage of the parent.
`Unit`	`constrainWidth(viewId: Int, width: Int)` Sets the width of the view.
`Unit`	`constrainedHeight(viewId: Int, constrained: Boolean)` Sets how the height is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.
`Unit`	`constrainedWidth(viewId: Int, constrained: Boolean)` Sets how the width is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.
`Unit`	`create(guidelineID: Int, orientation: Int)` Creates a ConstraintLayout virtual object.
`Unit`	`createBarrier(id: Int, direction: Int, margin: Int, referenced: IntArray!)` Creates a ConstraintLayout Barrier object.
`Unit`	`createHorizontalChain( leftId: Int, leftSide: Int, rightId: Int, rightSide: Int, chainIds: IntArray!, weights: FloatArray!, style: Int )` Spaces a set of widgets horizontally between the view startID and endId.
`Unit`	`createHorizontalChainRtl( startId: Int, startSide: Int, endId: Int, endSide: Int, chainIds: IntArray!, weights: FloatArray!, style: Int )` Spaces a set of widgets horizontal between the view startID and endId.
`Unit`	`createVerticalChain( topId: Int, topSide: Int, bottomId: Int, bottomSide: Int, chainIds: IntArray!, weights: FloatArray!, style: Int )` Spaces a set of widgets vertically between the view topId and bottomId.
`Unit`	`dump(scene: MotionScene!, ids: IntArray!)` Dump the contents
`Boolean`	`getApplyElevation(viewId: Int)` return with the constraint set will apply elevation for the specified view.
`ConstraintSet.Constraint!`	`getConstraint(id: Int)`
`HashMap<String!, ConstraintAttribute!>!`	`getCustomAttributeSet()`
`Int`	`getHeight(viewId: Int)` Get the height set in the view
`IntArray<Int>!`	`getKnownIds()`
`ConstraintSet.Constraint!`	`getParameters(mId: Int)`
`IntArray<Int>!`	`getReferencedIds(id: Int)` get the reference id's of a helper.
`Array<String!>!`	`getStateLabels()` Get the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet
`Int`	`getVisibility(viewId: Int)` Get the visibility flag set in this view
`Int`	`getVisibilityMode(viewId: Int)` ConstraintSet will not setVisibility.
`Int`	`getWidth(viewId: Int)` Get the width set in the view
`Boolean`	`isForceId()` Enforce id are required for all ConstraintLayout children to use ConstraintSet. default = true;
`Boolean`	`isValidateOnParse()` If true perform validation checks when parsing ConstraintSets This will slow down parsing and should only be used for debugging
`Unit`	`load(context: Context!, parser: XmlPullParser!)` Load a constraint set from a constraintSet.xml file
`Unit`	`load(context: Context!, resourceId: Int)` Load a constraint set from a constraintSet.xml file.
`Boolean`	`matchesLabels(types: Array<String!>!)` Test if the list of strings matches labels defined on this constraintSet
`Unit`	`parseColorAttributes(set: ConstraintSet.Constraint!, attributes: String!)` Parse color
`Unit`	`parseFloatAttributes(set: ConstraintSet.Constraint!, attributes: String!)` Parse floats
`Unit`	`parseIntAttributes(set: ConstraintSet.Constraint!, attributes: String!)` Parse int
`Unit`	`parseStringAttributes(set: ConstraintSet.Constraint!, attributes: String!)` Parse string
`Unit`	`readFallback(constraintLayout: ConstraintLayout!)` This will copy Constraints from the ConstraintLayout if it does not have parameters
`Unit`	`readFallback(set: ConstraintSet!)` This will copy Constraints from the ConstraintSet
`Unit`	`removeAttribute(attributeName: String!)` Remove the attribute
`Unit`	`removeFromHorizontalChain(viewId: Int)` Removes a view from a horizontal chain.
`Unit`	`removeFromVerticalChain(viewId: Int)` Removes a view from a vertical chain.
`Unit`	`setAlpha(viewId: Int, alpha: Float)` Adjust the alpha of a view.
`Unit`	`setApplyElevation(viewId: Int, apply: Boolean)` set if elevation will be applied to the view.
`Unit`	`setBarrierType(id: Int, type: Int)` SEt tye type of barier
`Unit`	`setColorValue(viewId: Int, attributeName: String!, value: Int)` Set the value of an attribute of type color
`Unit`	`setDimensionRatio(viewId: Int, ratio: String!)` Constrains the views aspect ratio.
`Unit`	`setEditorAbsoluteX(viewId: Int, position: Int)`
`Unit`	`setEditorAbsoluteY(viewId: Int, position: Int)`
`Unit`	`setElevation(viewId: Int, elevation: Float)` Adjust the elevation of a view.
`Unit`	`setFloatValue(viewId: Int, attributeName: String!, value: Float)` Set the value of an attribute of type float
`Unit`	`setForceId(forceId: Boolean)` Enforce id are required for all ConstraintLayout children to use ConstraintSet. default = true;
`Unit`	`setGoneMargin(viewId: Int, anchor: Int, value: Int)` Sets the gone margin.
`Unit`	`setGuidelineBegin(guidelineID: Int, margin: Int)` Set the guideline's distance form the top or left edge.
`Unit`	`setGuidelineEnd(guidelineID: Int, margin: Int)` Set a guideline's distance to end.
`Unit`	`setGuidelinePercent(guidelineID: Int, ratio: Float)` Set a Guideline's percent.
`Unit`	`setHorizontalBias(viewId: Int, bias: Float)` Adjust the horizontal bias of the view (used with views constrained on left and right).
`Unit`	`setHorizontalChainStyle(viewId: Int, chainStyle: Int)` How the elements of the horizontal chain will be positioned. if the dimension behaviour is set to MATCH_CONSTRAINT.
`Unit`	`setHorizontalWeight(viewId: Int, weight: Float)` The child's weight that we can use to distribute the available horizontal space in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT
`Unit`	`setIntValue(viewId: Int, attributeName: String!, value: Int)` Set the value of an attribute of type int
`Unit`	`setLayoutWrapBehavior(viewId: Int, behavior: Int)` Sets the wrap behavior of the widget in the parent's wrap computation
`Unit`	`setMargin(viewId: Int, anchor: Int, value: Int)` Sets the margin.
`Unit`	`setReferencedIds(id: Int, referenced: IntArray!)` sets the reference id's of a barrier.
`Unit`	`setRotation(viewId: Int, rotation: Float)` Adjust the post-layout rotation about the Z axis of a view.
`Unit`	`setRotationX(viewId: Int, rotationX: Float)` Adjust the post-layout rotation about the X axis of a view.
`Unit`	`setRotationY(viewId: Int, rotationY: Float)` Adjust the post-layout rotation about the Y axis of a view.
`Unit`	`setScaleX(viewId: Int, scaleX: Float)` Adjust the post-layout scale in X of a view.
`Unit`	`setScaleY(viewId: Int, scaleY: Float)` Adjust the post-layout scale in Y of a view.
`Unit`	`setStateLabels(types: String!)` Set the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet
`Unit`	`setStateLabelsList(types: Array<String!>!)` Set the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet
`Unit`	`setStringValue(viewId: Int, attributeName: String!, value: String!)` Set the value of an attribute of type string
`Unit`	`setTransformPivot( viewId: Int, transformPivotX: Float, transformPivotY: Float )` Set X,Y location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value.
`Unit`	`setTransformPivotX(viewId: Int, transformPivotX: Float)` Set X location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value.
`Unit`	`setTransformPivotY(viewId: Int, transformPivotY: Float)` Set Y location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value.
`Unit`	`setTranslation(viewId: Int, translationX: Float, translationY: Float)` Adjust the post-layout translation of a view.
`Unit`	`setTranslationX(viewId: Int, translationX: Float)` Adjust the post-layout X translation of a view.
`Unit`	`setTranslationY(viewId: Int, translationY: Float)` Adjust the post-layout Y translation of a view.
`Unit`	`setTranslationZ(viewId: Int, translationZ: Float)` Adjust the translation in Z of a view.
`Unit`	`setValidateOnParse(validate: Boolean)` If true perform validation checks when parsing ConstraintSets This will slow down parsing and should only be used for debugging
`Unit`	`setVerticalBias(viewId: Int, bias: Float)` Adjust the vertical bias of the view (used with views constrained on left and right).
`Unit`	`setVerticalChainStyle(viewId: Int, chainStyle: Int)` How the elements of the vertical chain will be positioned. in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT
`Unit`	`setVerticalWeight(viewId: Int, weight: Float)` The child's weight that we can use to distribute the available vertical space in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT
`Unit`	`setVisibility(viewId: Int, visibility: Int)` Adjust the visibility of a view.
`Unit`	`setVisibilityMode(viewId: Int, visibilityMode: Int)` ConstraintSet will not setVisibility.
`Unit`	`writeState(writer: Writer!, layout: ConstraintLayout!, flags: Int)` Write the state to a Writer

Public properties
`String!`	`derivedState`
`String!`	`mIdString`
`Int`	`mRotate`

Constants

BASELINE

Added in 2.2.0

const val BASELINE = 5: Int

The baseline of the text in a view.

BOTTOM

Added in 2.2.0

const val BOTTOM = 4: Int

The bottom side of a view.

CHAIN_PACKED

Added in 2.2.0

const val CHAIN_PACKED = 2: Int

Chain packed style

CHAIN_SPREAD

Added in 2.2.0

const val CHAIN_SPREAD = 0: Int

Chain spread style

CHAIN_SPREAD_INSIDE

Added in 2.2.0

const val CHAIN_SPREAD_INSIDE = 1: Int

Chain spread inside style

CIRCLE_REFERENCE

Added in 2.2.0

const val CIRCLE_REFERENCE = 8: Int

Circle reference from a view.

END

Added in 2.2.0

const val END = 7: Int

The right side of a view in left to right languages. In right to left languages it corresponds to the left side of the view

GONE

Added in 2.2.0

const val GONE = 8: Int

This view is gone, and will not take any space for layout purposes. Use with setVisibility and android:visibility.

HORIZONTAL

Added in 2.2.0

const val HORIZONTAL = 0: Int

The horizontal orientation.

HORIZONTAL_GUIDELINE

Added in 2.2.0

const val HORIZONTAL_GUIDELINE = 0: Int

Used to create a horizontal create guidelines.

INVISIBLE

Added in 2.2.0

const val INVISIBLE = 4: Int

This view is invisible, but it still takes up space for layout purposes. Use with setVisibility and android:visibility.

LEFT

Added in 2.2.0

const val LEFT = 1: Int

The left side of a view.

MATCH_CONSTRAINT

Added in 2.2.0

const val MATCH_CONSTRAINT = 0: Int

Dimension will be controlled by constraints

MATCH_CONSTRAINT_PERCENT

Added in 2.2.0

const val MATCH_CONSTRAINT_PERCENT = 2: Int

MATCH_CONSTRAINT_SPREAD

Added in 2.2.0

const val MATCH_CONSTRAINT_SPREAD = 0: Int

Calculate the size of a view in 0 dp by reducing the constrains gaps as much as possible

MATCH_CONSTRAINT_WRAP

Added in 2.2.0

const val MATCH_CONSTRAINT_WRAP = 1: Int

How to calculate the size of a view in 0 dp by using its wrap_content size

PARENT_ID

Added in 2.2.0

const val PARENT_ID = 0: Int

References the id of the parent. Used in:

connect
center

RIGHT

Added in 2.2.0

const val RIGHT = 2: Int

The right side of a view.

ROTATE_LEFT_OF_PORTRATE

Added in 2.2.0

const val ROTATE_LEFT_OF_PORTRATE = 4: Int

ROTATE_NONE

Added in 2.2.0

const val ROTATE_NONE = 0: Int

ROTATE_PORTRATE_OF_LEFT

Added in 2.2.0

const val ROTATE_PORTRATE_OF_LEFT = 2: Int

ROTATE_PORTRATE_OF_RIGHT

Added in 2.2.0

const val ROTATE_PORTRATE_OF_RIGHT = 1: Int

ROTATE_RIGHT_OF_PORTRATE

Added in 2.2.0

const val ROTATE_RIGHT_OF_PORTRATE = 3: Int

START

Added in 2.2.0

const val START = 6: Int

The left side of a view in left to right languages. In right to left languages it corresponds to the right side of the view

TOP

Added in 2.2.0

const val TOP = 3: Int

The top of a view.

UNSET

Added in 2.2.0

const val UNSET = -1: Int

Used to indicate a parameter is cleared or not set

VERTICAL

Added in 2.2.0

const val VERTICAL = 1: Int

The vertical orientation.

VERTICAL_GUIDELINE

Added in 2.2.0

const val VERTICAL_GUIDELINE = 1: Int

Used to create a vertical create guidelines. see create

VISIBILITY_MODE_IGNORE

Added in 2.2.0

const val VISIBILITY_MODE_IGNORE = 1: Int

VISIBILITY_MODE_NORMAL

Added in 2.2.0

const val VISIBILITY_MODE_NORMAL = 0: Int

VISIBLE

Added in 2.2.0

const val VISIBLE = 0: Int

This view is visible. Use with setVisibility and android:visibility.

WRAP_CONTENT

Added in 2.2.0

const val WRAP_CONTENT = -2: Int

Dimension will set by the view's content

Public constructors

ConstraintSet

Added in 2.2.0

ConstraintSet()

Public functions

addColorAttributes

fun addColorAttributes(attributeName: Array<String!>!): Unit

Add attribute of type Color

Parameters
`attributeName: Array<String!>!`

addFloatAttributes

fun addFloatAttributes(attributeName: Array<String!>!): Unit

Add attribute of type float

Parameters
`attributeName: Array<String!>!`

addIntAttributes

fun addIntAttributes(attributeName: Array<String!>!): Unit

Add attribute of type Int

Parameters
`attributeName: Array<String!>!`

addStringAttributes

fun addStringAttributes(attributeName: Array<String!>!): Unit

Add attribute of type string

Parameters
`attributeName: Array<String!>!`

addToHorizontalChain

Added in 2.2.0

fun addToHorizontalChain(viewId: Int, leftId: Int, rightId: Int): Unit

Adds a view to a horizontal chain.

Parameters
`viewId: Int`	view to add
`leftId: Int`	view in chain to the left
`rightId: Int`	view in chain to the right

addToHorizontalChainRTL

Added in 2.2.0

fun addToHorizontalChainRTL(viewId: Int, leftId: Int, rightId: Int): Unit

Adds a view to a horizontal chain.

Parameters
`viewId: Int`	view to add
`leftId: Int`	view to the start side
`rightId: Int`	view to the end side

addToVerticalChain

Added in 2.2.0

fun addToVerticalChain(viewId: Int, topId: Int, bottomId: Int): Unit

Adds a view to a vertical chain.

Parameters
`viewId: Int`	view to add to a vertical chain
`topId: Int`	view above.
`bottomId: Int`	view below

Added in 2.2.0

fun applyCustomAttributes(constraintLayout: ConstraintLayout!): Unit

Apply custom attributes alone

Parameters
`constraintLayout: ConstraintLayout!`

Added in 2.2.0

fun applyDeltaFrom(cs: ConstraintSet!): Unit

Get the delta form the ConstraintSet and aplly to this

Parameters
`cs: ConstraintSet!`

Added in 2.2.0

fun applyTo(constraintLayout: ConstraintLayout!): Unit

Apply the constraints to a ConstraintLayout.

Parameters
`constraintLayout: ConstraintLayout!`	to be modified

Added in 2.2.0

fun applyToHelper(
    helper: ConstraintHelper!,
    child: ConstraintWidget!,
    layoutParams: ConstraintLayout.LayoutParams!,
    mapIdToWidget: SparseArray<ConstraintWidget!>!
): Unit

Apply Layout to Helper widget

Parameters
`helper: ConstraintHelper!`
`child: ConstraintWidget!`
`layoutParams: ConstraintLayout.LayoutParams!`
`mapIdToWidget: SparseArray<ConstraintWidget!>!`

Added in 2.2.0

fun applyToLayoutParams(id: Int, layoutParams: ConstraintLayout.LayoutParams!): Unit

Fill in a ConstraintLayout LayoutParam based on the id.

Parameters
`id: Int`	Id of the view
`layoutParams: ConstraintLayout.LayoutParams!`	LayoutParams to be filled

Added in 2.2.0

fun applyToWithoutCustom(constraintLayout: ConstraintLayout!): Unit

Apply the constraints to a ConstraintLayout.

Parameters
`constraintLayout: ConstraintLayout!`	to be modified

buildDelta

Added in 2.2.0

java-static fun buildDelta(context: Context!, parser: XmlPullParser!): ConstraintSet.Constraint!

Used to read a ConstraintDelta

Parameters
`context: Context!`
`parser: XmlPullParser!`

Returns
`ConstraintSet.Constraint!`

center

Added in 2.2.0

fun center(
    centerID: Int,
    firstID: Int,
    firstSide: Int,
    firstMargin: Int,
    secondId: Int,
    secondSide: Int,
    secondMargin: Int,
    bias: Float
): Unit

Center widget between the other two widgets. (for sides see: TOP, BOTTOM, START, END, LEFT, RIGHT) Note, sides must be all vertical or horizontal sides.

Parameters
`centerID: Int`	ID of the widget to be centered
`firstID: Int`	ID of the first widget to connect the left or top of the widget to
`firstSide: Int`	the side of the widget to connect to
`firstMargin: Int`	the connection margin
`secondId: Int`	the ID of the second widget to connect to right or top of the widget to
`secondSide: Int`	the side of the widget to connect to
`secondMargin: Int`	the connection margin
`bias: Float`	the ratio between two connections

centerHorizontally

Added in 2.2.0

fun centerHorizontally(viewId: Int, toView: Int): Unit

Centers the view horizontally relative to toView's position.

Parameters
`viewId: Int`	ID of view to center Horizontally
`toView: Int`	ID of view to center on (or in)

centerHorizontally

Added in 2.2.0

fun centerHorizontally(
    centerID: Int,
    leftId: Int,
    leftSide: Int,
    leftMargin: Int,
    rightId: Int,
    rightSide: Int,
    rightMargin: Int,
    bias: Float
): Unit

Centers the widget horizontally to the left and right side on another widgets sides. (for sides see: START, END, LEFT, RIGHT)

Parameters
`centerID: Int`	ID of widget to be centered
`leftId: Int`	The Id of the widget on the left side
`leftSide: Int`	The side of the leftId widget to connect to
`leftMargin: Int`	The margin on the left side
`rightId: Int`	The Id of the widget on the right side
`rightSide: Int`	The side of the rightId widget to connect to
`rightMargin: Int`	The margin on the right side
`bias: Float`	The ratio of the space on the left vs. right sides 0.5 is centered (default)

centerHorizontallyRtl

Added in 2.2.0

fun centerHorizontallyRtl(viewId: Int, toView: Int): Unit

Centers the view horizontally relative to toView's position.

Parameters
`viewId: Int`	ID of view to center Horizontally
`toView: Int`	ID of view to center on (or in)

centerHorizontallyRtl

Added in 2.2.0

fun centerHorizontallyRtl(
    centerID: Int,
    startId: Int,
    startSide: Int,
    startMargin: Int,
    endId: Int,
    endSide: Int,
    endMargin: Int,
    bias: Float
): Unit

Centers the widgets horizontally to the left and right side on another widgets sides. (for sides see: START, END, LEFT, RIGHT)

Parameters
`centerID: Int`	ID of widget to be centered
`startId: Int`	The Id of the widget on the start side (left in non rtl languages)
`startSide: Int`	The side of the startId widget to connect to
`startMargin: Int`	The margin on the start side
`endId: Int`	The Id of the widget on the start side (left in non rtl languages)
`endSide: Int`	The side of the endId widget to connect to
`endMargin: Int`	The margin on the end side
`bias: Float`	The ratio of the space on the start vs end side 0.5 is centered (default)

centerVertically

Added in 2.2.0

fun centerVertically(viewId: Int, toView: Int): Unit

Centers the view vertically relative to toView's position.

Parameters
`viewId: Int`	ID of view to center Horizontally
`toView: Int`	ID of view to center on (or in)

centerVertically

Added in 2.2.0

fun centerVertically(
    centerID: Int,
    topId: Int,
    topSide: Int,
    topMargin: Int,
    bottomId: Int,
    bottomSide: Int,
    bottomMargin: Int,
    bias: Float
): Unit

Centers the widgets vertically to the top and bottom side on another widgets sides. (for sides see: TOP, BOTTOM)

Parameters
`centerID: Int`	ID of widget to be centered
`topId: Int`	The Id of the widget on the top side
`topSide: Int`	The side of the leftId widget to connect to
`topMargin: Int`	The margin on the top side
`bottomId: Int`	The Id of the widget on the bottom side
`bottomSide: Int`	The side of the bottomId widget to connect to
`bottomMargin: Int`	The margin on the bottom side
`bias: Float`	The ratio of the space on the top vs. bottom sides 0.5 is centered (default)

clear

Added in 2.2.0

fun clear(viewId: Int): Unit

Remove all constraints from this view.

Parameters
`viewId: Int`	ID of view to remove all connections to

clear

Added in 2.2.0

fun clear(viewId: Int, anchor: Int): Unit

Remove a constraint from this view.

Parameters
`viewId: Int`	ID of view to center on (or in)
`anchor: Int`	the Anchor to remove constraint from

Added in 2.2.0

fun clone(constraintLayout: ConstraintLayout!): Unit

Copy the layout parameters of a ConstraintLayout.

Parameters
`constraintLayout: ConstraintLayout!`	The ConstraintLayout to be copied

Added in 2.2.0

fun clone(constraints: Constraints!): Unit

Copy the layout parameters of a ConstraintLayout.

Parameters
`constraints: Constraints!`	The ConstraintLayout to be copied

Added in 2.2.0

fun clone(set: ConstraintSet!): Unit

Copy the constraints from a layout.

Parameters
`set: ConstraintSet!`	constraint set to copy

clone

Added in 2.2.0

fun clone(context: Context!, constraintLayoutId: Int): Unit

Copy the constraints from a layout.

Parameters
`context: Context!`	the context for the layout inflation
`constraintLayoutId: Int`	the id of the layout file

connect

Added in 2.2.0

fun connect(startID: Int, startSide: Int, endID: Int, endSide: Int): Unit

Create a constraint between two widgets. (for sides see: TOP, BOTTOM, START, END, LEFT, RIGHT, BASELINE)

Parameters
`startID: Int`	the ID of the widget to be constrained
`startSide: Int`	the side of the widget to constrain
`endID: Int`	the id of the widget to constrain to
`endSide: Int`	the side of widget to constrain to

connect

Added in 2.2.0

fun connect(startID: Int, startSide: Int, endID: Int, endSide: Int, margin: Int): Unit

Create a constraint between two widgets. (for sides see: TOP, BOTTOM, START, END, LEFT, RIGHT, BASELINE)

Parameters
`startID: Int`	the ID of the widget to be constrained
`startSide: Int`	the side of the widget to constrain
`endID: Int`	the id of the widget to constrain to
`endSide: Int`	the side of widget to constrain to
`margin: Int`	the margin to constrain (margin must be positive)

constrainCircle

Added in 2.2.0

fun constrainCircle(viewId: Int, id: Int, radius: Int, angle: Float): Unit

Constrain the view on a circle constraint

Parameters
`viewId: Int`	ID of the view we constrain
`id: Int`	ID of the view we constrain relative to
`radius: Int`	the radius of the circle in degrees
`angle: Float`	the angle

constrainDefaultHeight

Added in 2.2.0

fun constrainDefaultHeight(viewId: Int, height: Int): Unit

Sets how the height is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD. Default is spread.

Parameters
`viewId: Int`	ID of view to adjust its matchConstraintDefaultHeight
`height: Int`	MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD

constrainDefaultWidth

Added in 2.2.0

fun constrainDefaultWidth(viewId: Int, width: Int): Unit

Sets how the width is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD. Default is spread.

Parameters
`viewId: Int`	ID of view to adjust its matchConstraintDefaultWidth
`width: Int`	SPREAD or WRAP

constrainHeight

Added in 2.2.0

fun constrainHeight(viewId: Int, height: Int): Unit

Sets the height of the view. It can be a dimension, WRAP_CONTENT or MATCH_CONSTRAINT.

Parameters
`viewId: Int`	ID of view to adjust its height
`height: Int`	the height of the view

constrainMaxHeight

Added in 2.2.0

fun constrainMaxHeight(viewId: Int, height: Int): Unit

Sets the maximum height of the view. It is a dimension, It is only applicable if height is #MATCH_CONSTRAINT}.

Parameters
`viewId: Int`	ID of view to adjust it height
`height: Int`	the maximum height of the constraint

constrainMaxWidth

Added in 2.2.0

fun constrainMaxWidth(viewId: Int, width: Int): Unit

Sets the maximum width of the view. It is a dimension, It is only applicable if width is #MATCH_CONSTRAINT}.

Parameters
`viewId: Int`	ID of view to adjust its max height
`width: Int`	the maximum width of the view

constrainMinHeight

Added in 2.2.0

fun constrainMinHeight(viewId: Int, height: Int): Unit

Sets the height of the view. It is a dimension, It is only applicable if height is #MATCH_CONSTRAINT}.

Parameters
`viewId: Int`	ID of view to adjust its min height
`height: Int`	the minimum height of the view

constrainMinWidth

Added in 2.2.0

fun constrainMinWidth(viewId: Int, width: Int): Unit

Sets the width of the view. It is a dimension, It is only applicable if width is #MATCH_CONSTRAINT}.

Parameters
`viewId: Int`	ID of view to adjust its min height
`width: Int`	the minimum width of the view

constrainPercentHeight

Added in 2.2.0

fun constrainPercentHeight(viewId: Int, percent: Float): Unit

Sets the height of the view as a percentage of the parent.

Parameters
`viewId: Int`
`percent: Float`

constrainPercentWidth

Added in 2.2.0

fun constrainPercentWidth(viewId: Int, percent: Float): Unit

Sets the width of the view as a percentage of the parent.

Parameters
`viewId: Int`
`percent: Float`

constrainWidth

Added in 2.2.0

fun constrainWidth(viewId: Int, width: Int): Unit

Sets the width of the view. It can be a dimension, WRAP_CONTENT or MATCH_CONSTRAINT.

Parameters
`viewId: Int`	ID of view to adjust its width
`width: Int`	the width of the view

constrainedHeight

Added in 2.2.0

fun constrainedHeight(viewId: Int, constrained: Boolean): Unit

Sets how the height is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD. Default is spread.

Parameters
`viewId: Int`	ID of view to adjust its matchConstraintDefaultHeight
`constrained: Boolean`	if true height will be constrained

constrainedWidth

Added in 2.2.0

fun constrainedWidth(viewId: Int, constrained: Boolean): Unit

Sets how the width is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD. Default is spread.

Parameters
`viewId: Int`	ID of view to adjust its matchConstraintDefaultWidth
`constrained: Boolean`	if true with will be constrained

create

Added in 2.2.0

fun create(guidelineID: Int, orientation: Int): Unit

Creates a ConstraintLayout virtual object. Currently only horizontal or vertical GuideLines.

Parameters
`guidelineID: Int`	ID of guideline to create
`orientation: Int`	the Orientation of the guideline

createBarrier

fun createBarrier(id: Int, direction: Int, margin: Int, referenced: IntArray!): Unit

Creates a ConstraintLayout Barrier object.

Parameters
`id: Int`
`direction: Int`	Barrier.{LEFT,RIGHT,TOP,BOTTOM,START,END}
`referenced: IntArray!`

createHorizontalChain

Added in 2.2.0

fun createHorizontalChain(
    leftId: Int,
    leftSide: Int,
    rightId: Int,
    rightSide: Int,
    chainIds: IntArray!,
    weights: FloatArray!,
    style: Int
): Unit

Spaces a set of widgets horizontally between the view startID and endId. Widgets can be spaced with weights. This operation sets all the related margins to 0.

(for sides see: START, END, LEFT, RIGHT)

Parameters
`leftId: Int`	The id of the widget to connect to or PARENT_ID
`leftSide: Int`	the side of the start to connect to
`rightId: Int`	The id of the widget to connect to or PARENT_ID
`rightSide: Int`	the side of the right to connect to
`chainIds: IntArray!`	The widgets in the chain
`weights: FloatArray!`	The weight to assign to each element in the chain or null
`style: Int`	The type of chain

createHorizontalChainRtl

Added in 2.2.0

fun createHorizontalChainRtl(
    startId: Int,
    startSide: Int,
    endId: Int,
    endSide: Int,
    chainIds: IntArray!,
    weights: FloatArray!,
    style: Int
): Unit

Spaces a set of widgets horizontal between the view startID and endId. Widgets can be spaced with weights. (for sides see: START, END, LEFT, RIGHT)

Parameters
`startId: Int`	The id of the widget to connect to or PARENT_ID
`startSide: Int`	the side of the start to connect to
`endId: Int`	The id of the widget to connect to or PARENT_ID
`endSide: Int`	the side of the end to connect to
`chainIds: IntArray!`	The widgets in the chain
`weights: FloatArray!`	The weight to assign to each element in the chain or null
`style: Int`	The type of chain

createVerticalChain

Added in 2.2.0

fun createVerticalChain(
    topId: Int,
    topSide: Int,
    bottomId: Int,
    bottomSide: Int,
    chainIds: IntArray!,
    weights: FloatArray!,
    style: Int
): Unit

Spaces a set of widgets vertically between the view topId and bottomId. Widgets can be spaced with weights. This operation sets all the related margins to 0.

(for sides see: TOP, BOTTOM)

Parameters
`topId: Int`	The id of the widget to connect to or PARENT_ID
`topSide: Int`	the side of the start to connect to
`bottomId: Int`	The id of the widget to connect to or PARENT_ID
`bottomSide: Int`	the side of the right to connect to
`chainIds: IntArray!`	widgets to use as a chain
`weights: FloatArray!`	can be null
`style: Int`	set the style of the chain

fun dump(scene: MotionScene!, ids: IntArray!): Unit

Dump the contents

Parameters
`scene: MotionScene!`
`ids: IntArray!`

getApplyElevation

Added in 2.2.0

fun getApplyElevation(viewId: Int): Boolean

return with the constraint set will apply elevation for the specified view.

Returns
`Boolean`	true if the elevation will be set on this view (default is false)

getConstraint

Added in 2.2.0

fun getConstraint(id: Int): ConstraintSet.Constraint!

getCustomAttributeSet

Added in 2.2.0

fun getCustomAttributeSet(): HashMap<String!, ConstraintAttribute!>!

getHeight

Added in 2.2.0

fun getHeight(viewId: Int): Int

Get the height set in the view

Parameters
`viewId: Int`	the id of the view

Returns
`Int`	return the height constraint of the view

getKnownIds

Added in 2.2.0

fun getKnownIds(): IntArray<Int>!

getParameters

Added in 2.2.0

fun getParameters(mId: Int): ConstraintSet.Constraint!

Parameters
`mId: Int`

Returns
`ConstraintSet.Constraint!`

getReferencedIds

Added in 2.2.0

fun getReferencedIds(id: Int): IntArray<Int>!

get the reference id's of a helper.

Parameters
`id: Int`

Returns
`IntArray<Int>!`	array of id's

getStateLabels

Added in 2.2.0

fun getStateLabels(): Array<String!>!

Get the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet

Returns
`Array<String!>!`	an array of type strings

getVisibility

Added in 2.2.0

fun getVisibility(viewId: Int): Int

Get the visibility flag set in this view

Parameters
`viewId: Int`	the id of the view

Returns
`Int`	the visibility constraint for the view

getVisibilityMode

Added in 2.2.0

fun getVisibilityMode(viewId: Int): Int

ConstraintSet will not setVisibility. VISIBILITY_MODE_IGNORE or VISIBILITY_MODE_NORMAL.

Parameters
`viewId: Int`	ID of view

getWidth

Added in 2.2.0

fun getWidth(viewId: Int): Int

Get the width set in the view

Parameters
`viewId: Int`	the id of the view

Returns
`Int`	return the width constraint of the view

isForceId

Added in 2.2.0

fun isForceId(): Boolean

Enforce id are required for all ConstraintLayout children to use ConstraintSet. default = true;

isValidateOnParse

Added in 2.2.0

fun isValidateOnParse(): Boolean

If true perform validation checks when parsing ConstraintSets This will slow down parsing and should only be used for debugging

Returns
`Boolean`	validate

load

Added in 2.2.0

fun load(context: Context!, parser: XmlPullParser!): Unit

Load a constraint set from a constraintSet.xml file

Parameters
`context: Context!`	the context for the inflation
`parser: XmlPullParser!`	id of xml file in res/xml/

load

Added in 2.2.0

fun load(context: Context!, resourceId: Int): Unit

Load a constraint set from a constraintSet.xml file. Note. Do NOT use this to load a layout file. It will fail silently as there is no efficient way to differentiate.

Parameters
`context: Context!`	the context for the inflation
`resourceId: Int`	id of xml file in res/xml/

matchesLabels

fun matchesLabels(types: Array<String!>!): Boolean

Test if the list of strings matches labels defined on this constraintSet

Parameters
`types: Array<String!>!`	list of types

Returns
`Boolean`	true if all types are in the labels

Added in 2.2.0

fun parseColorAttributes(set: ConstraintSet.Constraint!, attributes: String!): Unit

Parse color

Parameters
`set: ConstraintSet.Constraint!`
`attributes: String!`

Added in 2.2.0

fun parseFloatAttributes(set: ConstraintSet.Constraint!, attributes: String!): Unit

Parse floats

Parameters
`set: ConstraintSet.Constraint!`
`attributes: String!`

Added in 2.2.0

fun parseIntAttributes(set: ConstraintSet.Constraint!, attributes: String!): Unit

Parse int

Parameters
`set: ConstraintSet.Constraint!`
`attributes: String!`

Added in 2.2.0

fun parseStringAttributes(set: ConstraintSet.Constraint!, attributes: String!): Unit

Parse string

Parameters
`set: ConstraintSet.Constraint!`
`attributes: String!`

Added in 2.2.0

fun readFallback(constraintLayout: ConstraintLayout!): Unit

This will copy Constraints from the ConstraintLayout if it does not have parameters

Parameters
`constraintLayout: ConstraintLayout!`

Added in 2.2.0

fun readFallback(set: ConstraintSet!): Unit

This will copy Constraints from the ConstraintSet

Parameters
`set: ConstraintSet!`

removeAttribute

Added in 2.2.0

fun removeAttribute(attributeName: String!): Unit

Remove the attribute

Parameters
`attributeName: String!`

removeFromHorizontalChain

Added in 2.2.0

fun removeFromHorizontalChain(viewId: Int): Unit

Removes a view from a horizontal chain. This assumes the view is connected to a horizontal chain. Its behaviour is undefined if not part of a horizontal chain.

Parameters
`viewId: Int`	the view to be removed

removeFromVerticalChain

Added in 2.2.0

fun removeFromVerticalChain(viewId: Int): Unit

Removes a view from a vertical chain. This assumes the view is connected to a vertical chain. Its behaviour is undefined if not part of a vertical chain.

Parameters
`viewId: Int`	the view to be removed

setAlpha

Added in 2.2.0

fun setAlpha(viewId: Int, alpha: Float): Unit

Adjust the alpha of a view.

Parameters
`viewId: Int`	ID of view to adjust the vertical
`alpha: Float`	the alpha

setApplyElevation

Added in 2.2.0

fun setApplyElevation(viewId: Int, apply: Boolean): Unit

set if elevation will be applied to the view. Elevation logic is based on style and animation. By default it is not used because it would lead to unexpected results.

Parameters
`apply: Boolean`	true if this constraint set applies elevation to this view

setBarrierType

Added in 2.2.0

fun setBarrierType(id: Int, type: Int): Unit

SEt tye type of barier

Parameters
`id: Int`
`type: Int`

setColorValue

Added in 2.2.0

fun setColorValue(viewId: Int, attributeName: String!, value: Int): Unit

Set the value of an attribute of type color

Parameters
`viewId: Int`
`attributeName: String!`
`value: Int`

setDimensionRatio

Added in 2.2.0

fun setDimensionRatio(viewId: Int, ratio: String!): Unit

Constrains the views aspect ratio. For Example a HD screen is 16 by 9 = 16/(float)9 = 1.777f.

Parameters
`viewId: Int`	ID of view to constrain
`ratio: String!`	The ratio of the width to height (width / height)

setEditorAbsoluteX

Added in 2.2.0

fun setEditorAbsoluteX(viewId: Int, position: Int): Unit

setEditorAbsoluteY

Added in 2.2.0

fun setEditorAbsoluteY(viewId: Int, position: Int): Unit

setElevation

Added in 2.2.0

fun setElevation(viewId: Int, elevation: Float): Unit

Adjust the elevation of a view.

Parameters
`viewId: Int`	ID of view to adjust the elevation
`elevation: Float`	the elevation

setFloatValue

Added in 2.2.0

fun setFloatValue(viewId: Int, attributeName: String!, value: Float): Unit

Set the value of an attribute of type float

Parameters
`viewId: Int`
`attributeName: String!`
`value: Float`

setForceId

Added in 2.2.0

fun setForceId(forceId: Boolean): Unit

Enforce id are required for all ConstraintLayout children to use ConstraintSet. default = true;

Parameters
`forceId: Boolean`

setGoneMargin

Added in 2.2.0

fun setGoneMargin(viewId: Int, anchor: Int, value: Int): Unit

Sets the gone margin.

Parameters
`viewId: Int`	ID of view to adjust the margin on
`anchor: Int`	The side to adjust the margin on
`value: Int`	The new value for the margin

setGuidelineBegin

Added in 2.2.0

fun setGuidelineBegin(guidelineID: Int, margin: Int): Unit

Set the guideline's distance form the top or left edge.

Parameters
`guidelineID: Int`	ID of the guideline
`margin: Int`	the distance to the top or left edge

setGuidelineEnd

Added in 2.2.0

fun setGuidelineEnd(guidelineID: Int, margin: Int): Unit

Set a guideline's distance to end.

Parameters
`guidelineID: Int`	ID of the guideline
`margin: Int`	the margin to the right or bottom side of container

setGuidelinePercent

Added in 2.2.0

fun setGuidelinePercent(guidelineID: Int, ratio: Float): Unit

Set a Guideline's percent.

Parameters
`guidelineID: Int`	ID of the guideline
`ratio: Float`	the ratio between the gap on the left and right 0.0 is top/left 0.5 is middle

setHorizontalBias

Added in 2.2.0

fun setHorizontalBias(viewId: Int, bias: Float): Unit

Adjust the horizontal bias of the view (used with views constrained on left and right).

Parameters
`viewId: Int`	ID of view to adjust the horizontal
`bias: Float`	the new bias 0.5 is in the middle

setHorizontalChainStyle

Added in 2.2.0

fun setHorizontalChainStyle(viewId: Int, chainStyle: Int): Unit

How the elements of the horizontal chain will be positioned. if the dimension behaviour is set to MATCH_CONSTRAINT. The possible values are:

CHAIN_SPREAD -- the elements will be spread out
CHAIN_SPREAD_INSIDE -- similar, but the endpoints of the chain will not be spread out
CHAIN_PACKED -- the elements of the chain will be packed together. The horizontal bias attribute of the child will then affect the positioning of the packed elements

Parameters
`viewId: Int`	ID of view to adjust its HorizontalChainStyle
`chainStyle: Int`	the weight that we can use to distribute the horizontal space

setHorizontalWeight

Added in 2.2.0

fun setHorizontalWeight(viewId: Int, weight: Float): Unit

The child's weight that we can use to distribute the available horizontal space in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT

Parameters
`viewId: Int`	ID of view to adjust its HorizontalWeight
`weight: Float`	the weight that we can use to distribute the horizontal space

setIntValue

Added in 2.2.0

fun setIntValue(viewId: Int, attributeName: String!, value: Int): Unit

Set the value of an attribute of type int

Parameters
`viewId: Int`
`attributeName: String!`
`value: Int`

setLayoutWrapBehavior

Added in 2.2.0

fun setLayoutWrapBehavior(viewId: Int, behavior: Int): Unit

Sets the wrap behavior of the widget in the parent's wrap computation

setMargin

Added in 2.2.0

fun setMargin(viewId: Int, anchor: Int, value: Int): Unit

Sets the margin.

Parameters
`viewId: Int`	ID of view to adjust the margin on
`anchor: Int`	The side to adjust the margin on
`value: Int`	The new value for the margin

setReferencedIds

fun setReferencedIds(id: Int, referenced: IntArray!): Unit

sets the reference id's of a barrier.

Parameters
`id: Int`
`referenced: IntArray!`

setRotation

Added in 2.2.0

fun setRotation(viewId: Int, rotation: Float): Unit

Adjust the post-layout rotation about the Z axis of a view.

Parameters
`viewId: Int`	ID of view to adjust th Z rotation
`rotation: Float`	the rotation about the X axis

setRotationX

Added in 2.2.0

fun setRotationX(viewId: Int, rotationX: Float): Unit

Adjust the post-layout rotation about the X axis of a view.

Parameters
`viewId: Int`	ID of view to adjust th X rotation
`rotationX: Float`	the rotation about the X axis

setRotationY

Added in 2.2.0

fun setRotationY(viewId: Int, rotationY: Float): Unit

Adjust the post-layout rotation about the Y axis of a view.

Parameters
`viewId: Int`	ID of view to adjust the Y rotation
`rotationY: Float`	the rotationY

setScaleX

Added in 2.2.0

fun setScaleX(viewId: Int, scaleX: Float): Unit

Adjust the post-layout scale in X of a view.

Parameters
`viewId: Int`	ID of view to adjust the scale in X
`scaleX: Float`	the scale in X

setScaleY

Added in 2.2.0

fun setScaleY(viewId: Int, scaleY: Float): Unit

Adjust the post-layout scale in Y of a view.

Parameters
`viewId: Int`	ID of view to adjust the scale in Y
`scaleY: Float`	the scale in Y

setStateLabels

Added in 2.2.0

fun setStateLabels(types: String!): Unit

Set the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet

Parameters
`types: String!`	a comer separated array of strings.

setStateLabelsList

fun setStateLabelsList(types: Array<String!>!): Unit

Set the types associated with this ConstraintSet The types mechanism allows you to tag the constraint set with a series of string to define properties of a ConstraintSet

Parameters
`types: Array<String!>!`	a comer separated array of strings.

setStringValue

Added in 2.2.0

fun setStringValue(viewId: Int, attributeName: String!, value: String!): Unit

Set the value of an attribute of type string

Parameters
`viewId: Int`
`attributeName: String!`
`value: String!`

setTransformPivot

Added in 2.2.0

fun setTransformPivot(
    viewId: Int,
    transformPivotX: Float,
    transformPivotY: Float
): Unit

Set X,Y location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value. Note: once an actual View has had its pivot set it cannot be cleared.

Parameters
`viewId: Int`	ID of view to adjust the transforms pivot point
`transformPivotX: Float`	X location of the pivot point.
`transformPivotY: Float`	Y location of the pivot point.

setTransformPivotX

Added in 2.2.0

fun setTransformPivotX(viewId: Int, transformPivotX: Float): Unit

Set X location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value. Note: once an actual View has had its pivot set it cannot be cleared.

Parameters
`viewId: Int`	ID of view to adjust the transforms pivot point about X
`transformPivotX: Float`	X location of the pivot point.

setTransformPivotY

Added in 2.2.0

fun setTransformPivotY(viewId: Int, transformPivotY: Float): Unit

Set Y location of the pivot point around which the view will rotate and scale. use Float.NaN to clear the pivot value. Note: once an actual View has had its pivot set it cannot be cleared.

Parameters
`viewId: Int`	ID of view to adjust the transforms pivot point about Y
`transformPivotY: Float`	Y location of the pivot point.

setTranslation

Added in 2.2.0

fun setTranslation(viewId: Int, translationX: Float, translationY: Float): Unit

Adjust the post-layout translation of a view.

Parameters
`viewId: Int`	ID of view to adjust its translation in X &Y
`translationX: Float`	the translation in X
`translationY: Float`	the translation in Y

setTranslationX

Added in 2.2.0

fun setTranslationX(viewId: Int, translationX: Float): Unit

Adjust the post-layout X translation of a view.

Parameters
`viewId: Int`	ID of view to translate in X
`translationX: Float`	the translation in X

setTranslationY

Added in 2.2.0

fun setTranslationY(viewId: Int, translationY: Float): Unit

Adjust the post-layout Y translation of a view.

Parameters
`viewId: Int`	ID of view to to translate in Y
`translationY: Float`	the translation in Y

setTranslationZ

Added in 2.2.0

fun setTranslationZ(viewId: Int, translationZ: Float): Unit

Adjust the translation in Z of a view.

Parameters
`viewId: Int`	ID of view to adjust
`translationZ: Float`	the translationZ

setValidateOnParse

Added in 2.2.0

fun setValidateOnParse(validate: Boolean): Unit

If true perform validation checks when parsing ConstraintSets This will slow down parsing and should only be used for debugging

Parameters
`validate: Boolean`

setVerticalBias

Added in 2.2.0

fun setVerticalBias(viewId: Int, bias: Float): Unit

Adjust the vertical bias of the view (used with views constrained on left and right).

Parameters
`viewId: Int`	ID of view to adjust the vertical
`bias: Float`	the new bias 0.5 is in the middle

setVerticalChainStyle

Added in 2.2.0

fun setVerticalChainStyle(viewId: Int, chainStyle: Int): Unit

How the elements of the vertical chain will be positioned. in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT

CHAIN_SPREAD -- the elements will be spread out
CHAIN_SPREAD_INSIDE -- similar, but the endpoints of the chain will not be spread out
CHAIN_PACKED -- the elements of the chain will be packed together. The vertical bias attribute of the child will then affect the positioning of the packed elements

Parameters
`viewId: Int`	ID of view to adjust its VerticalChainStyle
`chainStyle: Int`	the weight that we can use to distribute the horizontal space

setVerticalWeight

Added in 2.2.0

fun setVerticalWeight(viewId: Int, weight: Float): Unit

The child's weight that we can use to distribute the available vertical space in a chain, if the dimension behaviour is set to MATCH_CONSTRAINT

Parameters
`viewId: Int`	ID of view to adjust its VerticalWeight
`weight: Float`	the weight that we can use to distribute the vertical space

setVisibility

Added in 2.2.0

fun setVisibility(viewId: Int, visibility: Int): Unit

Adjust the visibility of a view.

Parameters
`viewId: Int`	ID of view to adjust the vertical
`visibility: Int`	the visibility

setVisibilityMode

Added in 2.2.0

fun setVisibilityMode(viewId: Int, visibilityMode: Int): Unit

ConstraintSet will not setVisibility. VISIBILITY_MODE_IGNORE or VISIBILITY_MODE_NORMAL.

Parameters
`viewId: Int`	ID of view
`visibilityMode: Int`

Added in 2.2.0

fun writeState(writer: Writer!, layout: ConstraintLayout!, flags: Int): Unit

Write the state to a Writer

Parameters
`writer: Writer!`
`layout: ConstraintLayout!`
`flags: Int`

Throws
`java.io.IOException`

Public properties

derivedState

Added in 2.2.0

val derivedState: String!

mIdString

Added in 2.2.0

val mIdString: String!

mRotate

Added in 2.2.0

val mRotate: Int

ConstraintSet

Summary

Nested types

Constants

Public constructors

Public functions

Public properties

Constants

BASELINE

BOTTOM

CHAIN_PACKED

CHAIN_SPREAD

CHAIN_SPREAD_INSIDE

CIRCLE_REFERENCE

END

GONE

HORIZONTAL

HORIZONTAL_GUIDELINE

INVISIBLE

LEFT

MATCH_CONSTRAINT

MATCH_CONSTRAINT_PERCENT

MATCH_CONSTRAINT_SPREAD

MATCH_CONSTRAINT_WRAP

PARENT_ID

RIGHT

ROTATE_LEFT_OF_PORTRATE

ROTATE_NONE

ROTATE_PORTRATE_OF_LEFT

ROTATE_PORTRATE_OF_RIGHT

ROTATE_RIGHT_OF_PORTRATE

START

TOP

UNSET

VERTICAL

VERTICAL_GUIDELINE

VISIBILITY_MODE_IGNORE

VISIBILITY_MODE_NORMAL

VISIBLE

WRAP_CONTENT

Public constructors

ConstraintSet

Public functions

addColorAttributes

addFloatAttributes

addIntAttributes

addStringAttributes

addToHorizontalChain

addToHorizontalChainRTL

addToVerticalChain

applyCustomAttributes

applyDeltaFrom

applyTo

applyToHelper

applyToLayoutParams

applyToWithoutCustom

buildDelta

center

centerHorizontally

centerHorizontally

centerHorizontallyRtl

centerHorizontallyRtl

centerVertically

centerVertically

clear

clear

clone

clone

clone

clone

connect

connect

constrainCircle

constrainDefaultHeight

constrainDefaultWidth

constrainHeight

constrainMaxHeight

constrainMaxWidth

constrainMinHeight

constrainMinWidth