ConstraintSet

Artifact: androidx.constraintlayout:constraintlayout

Kotlin |Java

public 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
`public class ConstraintSet.Constraint`
`public class ConstraintSet.Layout`
`public class ConstraintSet.Motion`
`public class ConstraintSet.PropertySet`
`public class ConstraintSet.Transform`

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

Public fields
`String`	`derivedState`
`String`	`mIdString`
`int`	`mRotate`

Public constructors
`ConstraintSet()`

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

Constants

BASELINE

Added in 2.2.0-rc01

public static final int BASELINE = 5

The baseline of the text in a view.

BOTTOM

Added in 2.2.0-rc01

public static final int BOTTOM = 4

The bottom side of a view.

CHAIN_PACKED

Added in 2.2.0-rc01

public static final int CHAIN_PACKED = 2

Chain packed style

CHAIN_SPREAD

Added in 2.2.0-rc01

public static final int CHAIN_SPREAD = 0

Chain spread style

CHAIN_SPREAD_INSIDE

Added in 2.2.0-rc01

public static final int CHAIN_SPREAD_INSIDE = 1

Chain spread inside style

CIRCLE_REFERENCE

Added in 2.2.0-rc01

public static final int CIRCLE_REFERENCE = 8

Circle reference from a view.

END

Added in 2.2.0-rc01

public static final int END = 7

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-rc01

public static final int GONE = 8

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-rc01

public static final int HORIZONTAL = 0

The horizontal orientation.

HORIZONTAL_GUIDELINE

Added in 2.2.0-rc01

public static final int HORIZONTAL_GUIDELINE = 0

Used to create a horizontal create guidelines.

INVISIBLE

Added in 2.2.0-rc01

public static final int INVISIBLE = 4

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-rc01

public static final int LEFT = 1

The left side of a view.

MATCH_CONSTRAINT

Added in 2.2.0-rc01

public static final int MATCH_CONSTRAINT = 0

Dimension will be controlled by constraints

MATCH_CONSTRAINT_PERCENT

Added in 2.2.0-rc01

public static final int MATCH_CONSTRAINT_PERCENT = 2

MATCH_CONSTRAINT_SPREAD

Added in 2.2.0-rc01

public static final int MATCH_CONSTRAINT_SPREAD = 0

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-rc01

public static final int MATCH_CONSTRAINT_WRAP = 1

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

PARENT_ID

Added in 2.2.0-rc01

public static final int PARENT_ID = 0

References the id of the parent. Used in:

connect
center

RIGHT

Added in 2.2.0-rc01

public static final int RIGHT = 2

The right side of a view.

ROTATE_LEFT_OF_PORTRATE

Added in 2.2.0-rc01

public static final int ROTATE_LEFT_OF_PORTRATE = 4

ROTATE_NONE

Added in 2.2.0-rc01

public static final int ROTATE_NONE = 0

ROTATE_PORTRATE_OF_LEFT

Added in 2.2.0-rc01

public static final int ROTATE_PORTRATE_OF_LEFT = 2

ROTATE_PORTRATE_OF_RIGHT

Added in 2.2.0-rc01

public static final int ROTATE_PORTRATE_OF_RIGHT = 1

ROTATE_RIGHT_OF_PORTRATE

Added in 2.2.0-rc01

public static final int ROTATE_RIGHT_OF_PORTRATE = 3

START

Added in 2.2.0-rc01

public static final int START = 6

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-rc01

public static final int TOP = 3

The top of a view.

UNSET

Added in 2.2.0-rc01

public static final int UNSET = -1

Used to indicate a parameter is cleared or not set

VERTICAL

Added in 2.2.0-rc01

public static final int VERTICAL = 1

The vertical orientation.

VERTICAL_GUIDELINE

Added in 2.2.0-rc01

public static final int VERTICAL_GUIDELINE = 1

Used to create a vertical create guidelines. see create

VISIBILITY_MODE_IGNORE

Added in 2.2.0-rc01

public static final int VISIBILITY_MODE_IGNORE = 1

VISIBILITY_MODE_NORMAL

Added in 2.2.0-rc01

public static final int VISIBILITY_MODE_NORMAL = 0

VISIBLE

Added in 2.2.0-rc01

public static final int VISIBLE = 0

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

WRAP_CONTENT

Added in 2.2.0-rc01

public static final int WRAP_CONTENT = -2

Dimension will set by the view's content

Public fields

derivedState

Added in 2.2.0-rc01

public String derivedState

mIdString

Added in 2.2.0-rc01

public String mIdString

mRotate

Added in 2.2.0-rc01

public int mRotate

Public constructors

ConstraintSet

Added in 2.2.0-rc01

public ConstraintSet()

Public methods

addColorAttributes

public void addColorAttributes(String[] attributeName)

Add attribute of type Color

Parameters
`String[] attributeName`

addFloatAttributes

public void addFloatAttributes(String[] attributeName)

Add attribute of type float

Parameters
`String[] attributeName`

addIntAttributes

public void addIntAttributes(String[] attributeName)

Add attribute of type Int

Parameters
`String[] attributeName`

addStringAttributes

public void addStringAttributes(String[] attributeName)

Add attribute of type string

Parameters
`String[] attributeName`

addToHorizontalChain

Added in 2.2.0-rc01

public void addToHorizontalChain(int viewId, int leftId, int rightId)

Adds a view to a horizontal chain.

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

addToHorizontalChainRTL

Added in 2.2.0-rc01

public void addToHorizontalChainRTL(int viewId, int leftId, int rightId)

Adds a view to a horizontal chain.

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

addToVerticalChain

Added in 2.2.0-rc01

public void addToVerticalChain(int viewId, int topId, int bottomId)

Adds a view to a vertical chain.

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

Added in 2.2.0-rc01

public void applyCustomAttributes(ConstraintLayout constraintLayout)

Apply custom attributes alone

Parameters
`ConstraintLayout constraintLayout`

Added in 2.2.0-rc01

public void applyDeltaFrom(ConstraintSet cs)

Get the delta form the ConstraintSet and aplly to this

Parameters
`ConstraintSet cs`

Added in 2.2.0-rc01

public void applyTo(ConstraintLayout constraintLayout)

Apply the constraints to a ConstraintLayout.

Parameters
`ConstraintLayout constraintLayout`	to be modified

Added in 2.2.0-rc01

public void applyToHelper(
    ConstraintHelper helper,
    ConstraintWidget child,
    ConstraintLayout.LayoutParams layoutParams,
    SparseArray<ConstraintWidget> mapIdToWidget
)

Apply Layout to Helper widget

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

Added in 2.2.0-rc01

public void applyToLayoutParams(int id, ConstraintLayout.LayoutParams layoutParams)

Fill in a ConstraintLayout LayoutParam based on the id.

Parameters
`int id`	Id of the view
`ConstraintLayout.LayoutParams layoutParams`	LayoutParams to be filled

Added in 2.2.0-rc01

public void applyToWithoutCustom(ConstraintLayout constraintLayout)

Apply the constraints to a ConstraintLayout.

Parameters
`ConstraintLayout constraintLayout`	to be modified

buildDelta

Added in 2.2.0-rc01

public static ConstraintSet.Constraint buildDelta(Context context, XmlPullParser parser)

Used to read a ConstraintDelta

Parameters
`Context context`
`XmlPullParser parser`

Returns
`ConstraintSet.Constraint`

center

Added in 2.2.0-rc01

public void center(
    int centerID,
    int firstID,
    int firstSide,
    int firstMargin,
    int secondId,
    int secondSide,
    int secondMargin,
    float bias
)

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

centerHorizontally

Added in 2.2.0-rc01

public void centerHorizontally(int viewId, int toView)

Centers the view horizontally relative to toView's position.

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

centerHorizontally

Added in 2.2.0-rc01

public void centerHorizontally(
    int centerID,
    int leftId,
    int leftSide,
    int leftMargin,
    int rightId,
    int rightSide,
    int rightMargin,
    float bias
)

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

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

centerHorizontallyRtl

Added in 2.2.0-rc01

public void centerHorizontallyRtl(int viewId, int toView)

Centers the view horizontally relative to toView's position.

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

centerHorizontallyRtl

Added in 2.2.0-rc01

public void centerHorizontallyRtl(
    int centerID,
    int startId,
    int startSide,
    int startMargin,
    int endId,
    int endSide,
    int endMargin,
    float bias
)

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

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

centerVertically

Added in 2.2.0-rc01

public void centerVertically(int viewId, int toView)

Centers the view vertically relative to toView's position.

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

centerVertically

Added in 2.2.0-rc01

public void centerVertically(
    int centerID,
    int topId,
    int topSide,
    int topMargin,
    int bottomId,
    int bottomSide,
    int bottomMargin,
    float bias
)

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

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

clear

Added in 2.2.0-rc01

public void clear(int viewId)

Remove all constraints from this view.

Parameters
`int viewId`	ID of view to remove all connections to

clear

Added in 2.2.0-rc01

public void clear(int viewId, int anchor)

Remove a constraint from this view.

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

Added in 2.2.0-rc01

public void clone(ConstraintLayout constraintLayout)

Copy the layout parameters of a ConstraintLayout.

Parameters
`ConstraintLayout constraintLayout`	The ConstraintLayout to be copied

Added in 2.2.0-rc01

public void clone(Constraints constraints)

Copy the layout parameters of a ConstraintLayout.

Parameters
`Constraints constraints`	The ConstraintLayout to be copied

Added in 2.2.0-rc01

public void clone(ConstraintSet set)

Copy the constraints from a layout.

Parameters
`ConstraintSet set`	constraint set to copy

clone

Added in 2.2.0-rc01

public void clone(Context context, int constraintLayoutId)

Copy the constraints from a layout.

Parameters
`Context context`	the context for the layout inflation
`int constraintLayoutId`	the id of the layout file

connect

Added in 2.2.0-rc01

public void connect(int startID, int startSide, int endID, int endSide)

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

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

connect

Added in 2.2.0-rc01

public void connect(int startID, int startSide, int endID, int endSide, int margin)

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

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

constrainCircle

Added in 2.2.0-rc01

public void constrainCircle(int viewId, int id, int radius, float angle)

Constrain the view on a circle constraint

Parameters
`int viewId`	ID of the view we constrain
`int id`	ID of the view we constrain relative to
`int radius`	the radius of the circle in degrees
`float angle`	the angle

constrainDefaultHeight

Added in 2.2.0-rc01

public void constrainDefaultHeight(int viewId, int height)

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

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

constrainDefaultWidth

Added in 2.2.0-rc01

public void constrainDefaultWidth(int viewId, int width)

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

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

constrainHeight

Added in 2.2.0-rc01

public void constrainHeight(int viewId, int height)

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

Parameters
`int viewId`	ID of view to adjust its height
`int height`	the height of the view

constrainMaxHeight

Added in 2.2.0-rc01

public void constrainMaxHeight(int viewId, int height)

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

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

constrainMaxWidth

Added in 2.2.0-rc01

public void constrainMaxWidth(int viewId, int width)

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

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

constrainMinHeight

Added in 2.2.0-rc01

public void constrainMinHeight(int viewId, int height)

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

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

constrainMinWidth

Added in 2.2.0-rc01

public void constrainMinWidth(int viewId, int width)

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

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

constrainPercentHeight

Added in 2.2.0-rc01

public void constrainPercentHeight(int viewId, float percent)

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

Parameters
`int viewId`
`float percent`

constrainPercentWidth

Added in 2.2.0-rc01

public void constrainPercentWidth(int viewId, float percent)

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

Parameters
`int viewId`
`float percent`

constrainWidth

Added in 2.2.0-rc01

public void constrainWidth(int viewId, int width)

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

Parameters
`int viewId`	ID of view to adjust its width
`int width`	the width of the view

constrainedHeight

Added in 2.2.0-rc01

public void constrainedHeight(int viewId, boolean constrained)

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

Parameters
`int viewId`	ID of view to adjust its matchConstraintDefaultHeight
`boolean constrained`	if true height will be constrained

constrainedWidth

Added in 2.2.0-rc01

public void constrainedWidth(int viewId, boolean constrained)

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

Parameters
`int viewId`	ID of view to adjust its matchConstraintDefaultWidth
`boolean constrained`	if true with will be constrained

create

Added in 2.2.0-rc01

public void create(int guidelineID, int orientation)

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

Parameters
`int guidelineID`	ID of guideline to create
`int orientation`	the Orientation of the guideline

createBarrier

public void createBarrier(int id, int direction, int margin, int[] referenced)

Creates a ConstraintLayout Barrier object.

Parameters
`int id`
`int direction`	Barrier.{LEFT,RIGHT,TOP,BOTTOM,START,END}
`int[] referenced`

createHorizontalChain

Added in 2.2.0-rc01

public void createHorizontalChain(
    int leftId,
    int leftSide,
    int rightId,
    int rightSide,
    int[] chainIds,
    float[] weights,
    int style
)

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
`int leftId`	The id of the widget to connect to or PARENT_ID
`int leftSide`	the side of the start to connect to
`int rightId`	The id of the widget to connect to or PARENT_ID
`int rightSide`	the side of the right to connect to
`int[] chainIds`	The widgets in the chain
`float[] weights`	The weight to assign to each element in the chain or null
`int style`	The type of chain

createHorizontalChainRtl

Added in 2.2.0-rc01

public void createHorizontalChainRtl(
    int startId,
    int startSide,
    int endId,
    int endSide,
    int[] chainIds,
    float[] weights,
    int style
)

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
`int startId`	The id of the widget to connect to or PARENT_ID
`int startSide`	the side of the start to connect to
`int endId`	The id of the widget to connect to or PARENT_ID
`int endSide`	the side of the end to connect to
`int[] chainIds`	The widgets in the chain
`float[] weights`	The weight to assign to each element in the chain or null
`int style`	The type of chain

createVerticalChain

Added in 2.2.0-rc01

public void createVerticalChain(
    int topId,
    int topSide,
    int bottomId,
    int bottomSide,
    int[] chainIds,
    float[] weights,
    int style
)

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
`int topId`	The id of the widget to connect to or PARENT_ID
`int topSide`	the side of the start to connect to
`int bottomId`	The id of the widget to connect to or PARENT_ID
`int bottomSide`	the side of the right to connect to
`int[] chainIds`	widgets to use as a chain
`float[] weights`	can be null
`int style`	set the style of the chain

public void dump(MotionScene scene, int[] ids)

Dump the contents

Parameters
`MotionScene scene`
`int[] ids`

getApplyElevation

Added in 2.2.0-rc01

public boolean getApplyElevation(int viewId)

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-rc01

public ConstraintSet.Constraint getConstraint(int id)

getCustomAttributeSet

Added in 2.2.0-rc01

public HashMap<String, ConstraintAttribute> getCustomAttributeSet()

getHeight

Added in 2.2.0-rc01

public int getHeight(int viewId)

Get the height set in the view

Parameters
`int viewId`	the id of the view

Returns
`int`	return the height constraint of the view

getKnownIds

Added in 2.2.0-rc01

public int[] getKnownIds()

getParameters

Added in 2.2.0-rc01

public ConstraintSet.Constraint getParameters(int mId)

Parameters
`int mId`

Returns
`ConstraintSet.Constraint`

getReferencedIds

Added in 2.2.0-rc01

public int[] getReferencedIds(int id)

get the reference id's of a helper.

Parameters
`int id`

Returns
`int[]`	array of id's

getStateLabels

Added in 2.2.0-rc01

public 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

Returns
`String[]`	an array of type strings

getVisibility

Added in 2.2.0-rc01

public int getVisibility(int viewId)

Get the visibility flag set in this view

Parameters
`int viewId`	the id of the view

Returns
`int`	the visibility constraint for the view

getVisibilityMode

Added in 2.2.0-rc01

public int getVisibilityMode(int viewId)

ConstraintSet will not setVisibility. VISIBILITY_MODE_IGNORE or VISIBILITY_MODE_NORMAL.

Parameters
`int viewId`	ID of view

getWidth

Added in 2.2.0-rc01

public int getWidth(int viewId)

Get the width set in the view

Parameters
`int viewId`	the id of the view

Returns
`int`	return the width constraint of the view

isForceId

Added in 2.2.0-rc01

public boolean isForceId()

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

isValidateOnParse

Added in 2.2.0-rc01

public boolean isValidateOnParse()

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-rc01

public void load(Context context, XmlPullParser parser)

Load a constraint set from a constraintSet.xml file

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

load

Added in 2.2.0-rc01

public void load(Context context, int resourceId)

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
`int resourceId`	id of xml file in res/xml/

matchesLabels

public boolean matchesLabels(String[] types)

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

Parameters
`String[] types`	list of types

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

Added in 2.2.0-rc01

public void parseColorAttributes(ConstraintSet.Constraint set, String attributes)

Parse color

Parameters
`ConstraintSet.Constraint set`
`String attributes`

Added in 2.2.0-rc01

public void parseFloatAttributes(ConstraintSet.Constraint set, String attributes)

Parse floats

Parameters
`ConstraintSet.Constraint set`
`String attributes`

Added in 2.2.0-rc01

public void parseIntAttributes(ConstraintSet.Constraint set, String attributes)

Parse int

Parameters
`ConstraintSet.Constraint set`
`String attributes`

Added in 2.2.0-rc01

public void parseStringAttributes(ConstraintSet.Constraint set, String attributes)

Parse string

Parameters
`ConstraintSet.Constraint set`
`String attributes`

Added in 2.2.0-rc01

public void readFallback(ConstraintLayout constraintLayout)

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

Parameters
`ConstraintLayout constraintLayout`

Added in 2.2.0-rc01

public void readFallback(ConstraintSet set)

This will copy Constraints from the ConstraintSet

Parameters
`ConstraintSet set`

removeAttribute

Added in 2.2.0-rc01

public void removeAttribute(String attributeName)

Remove the attribute

Parameters
`String attributeName`

removeFromHorizontalChain

Added in 2.2.0-rc01

public void removeFromHorizontalChain(int viewId)

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
`int viewId`	the view to be removed

removeFromVerticalChain

Added in 2.2.0-rc01

public void removeFromVerticalChain(int viewId)

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
`int viewId`	the view to be removed

setAlpha

Added in 2.2.0-rc01

public void setAlpha(int viewId, float alpha)

Adjust the alpha of a view.

Parameters
`int viewId`	ID of view to adjust the vertical
`float alpha`	the alpha

setApplyElevation

Added in 2.2.0-rc01

public void setApplyElevation(int viewId, boolean apply)

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
`boolean apply`	true if this constraint set applies elevation to this view

setBarrierType

Added in 2.2.0-rc01

public void setBarrierType(int id, int type)

SEt tye type of barier

Parameters
`int id`
`int type`

setColorValue

Added in 2.2.0-rc01

public void setColorValue(int viewId, String attributeName, int value)

Set the value of an attribute of type color

Parameters
`int viewId`
`String attributeName`
`int value`

setDimensionRatio

Added in 2.2.0-rc01

public void setDimensionRatio(int viewId, String ratio)

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

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

setEditorAbsoluteX

Added in 2.2.0-rc01

public void setEditorAbsoluteX(int viewId, int position)

setEditorAbsoluteY

Added in 2.2.0-rc01

public void setEditorAbsoluteY(int viewId, int position)

setElevation

Added in 2.2.0-rc01

public void setElevation(int viewId, float elevation)

Adjust the elevation of a view.

Parameters
`int viewId`	ID of view to adjust the elevation
`float elevation`	the elevation

setFloatValue

Added in 2.2.0-rc01

public void setFloatValue(int viewId, String attributeName, float value)

Set the value of an attribute of type float

Parameters
`int viewId`
`String attributeName`
`float value`

setForceId

Added in 2.2.0-rc01

public void setForceId(boolean forceId)

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

Parameters
`boolean forceId`

setGoneMargin

Added in 2.2.0-rc01

public void setGoneMargin(int viewId, int anchor, int value)

Sets the gone margin.

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

setGuidelineBegin

Added in 2.2.0-rc01

public void setGuidelineBegin(int guidelineID, int margin)

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

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

setGuidelineEnd

Added in 2.2.0-rc01

public void setGuidelineEnd(int guidelineID, int margin)

Set a guideline's distance to end.

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

setGuidelinePercent

Added in 2.2.0-rc01

public void setGuidelinePercent(int guidelineID, float ratio)

Set a Guideline's percent.

Parameters
`int guidelineID`	ID of the guideline
`float ratio`	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-rc01

public void setHorizontalBias(int viewId, float bias)

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

Parameters
`int viewId`	ID of view to adjust the horizontal
`float bias`	the new bias 0.5 is in the middle

setHorizontalChainStyle

Added in 2.2.0-rc01

public void setHorizontalChainStyle(int viewId, int chainStyle)

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

setHorizontalWeight

Added in 2.2.0-rc01

public void setHorizontalWeight(int viewId, float weight)

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
`int viewId`	ID of view to adjust its HorizontalWeight
`float weight`	the weight that we can use to distribute the horizontal space

setIntValue

Added in 2.2.0-rc01

public void setIntValue(int viewId, String attributeName, int value)

Set the value of an attribute of type int

Parameters
`int viewId`
`String attributeName`
`int value`

setLayoutWrapBehavior

Added in 2.2.0-rc01

public void setLayoutWrapBehavior(int viewId, int behavior)

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

setMargin

Added in 2.2.0-rc01

public void setMargin(int viewId, int anchor, int value)

Sets the margin.

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

setReferencedIds

public void setReferencedIds(int id, int[] referenced)

sets the reference id's of a barrier.

Parameters
`int id`
`int[] referenced`

setRotation

Added in 2.2.0-rc01

public void setRotation(int viewId, float rotation)

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

Parameters
`int viewId`	ID of view to adjust th Z rotation
`float rotation`	the rotation about the X axis

setRotationX

Added in 2.2.0-rc01

public void setRotationX(int viewId, float rotationX)

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

Parameters
`int viewId`	ID of view to adjust th X rotation
`float rotationX`	the rotation about the X axis

setRotationY

Added in 2.2.0-rc01

public void setRotationY(int viewId, float rotationY)

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

Parameters
`int viewId`	ID of view to adjust the Y rotation
`float rotationY`	the rotationY

setScaleX

Added in 2.2.0-rc01

public void setScaleX(int viewId, float scaleX)

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

Parameters
`int viewId`	ID of view to adjust the scale in X
`float scaleX`	the scale in X

setScaleY

Added in 2.2.0-rc01

public void setScaleY(int viewId, float scaleY)

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

Parameters
`int viewId`	ID of view to adjust the scale in Y
`float scaleY`	the scale in Y

setStateLabels

Added in 2.2.0-rc01

public void setStateLabels(String types)

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
`String types`	a comer separated array of strings.

setStateLabelsList

public void setStateLabelsList(String[] types)

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
`String[] types`	a comer separated array of strings.

setStringValue

Added in 2.2.0-rc01

public void setStringValue(int viewId, String attributeName, String value)

Set the value of an attribute of type string

Parameters
`int viewId`
`String attributeName`
`String value`

setTransformPivot

Added in 2.2.0-rc01

public void setTransformPivot(
    int viewId,
    float transformPivotX,
    float transformPivotY
)

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
`int viewId`	ID of view to adjust the transforms pivot point
`float transformPivotX`	X location of the pivot point.
`float transformPivotY`	Y location of the pivot point.

setTransformPivotX

Added in 2.2.0-rc01

public void setTransformPivotX(int viewId, float transformPivotX)

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
`int viewId`	ID of view to adjust the transforms pivot point about X
`float transformPivotX`	X location of the pivot point.

setTransformPivotY

Added in 2.2.0-rc01

public void setTransformPivotY(int viewId, float transformPivotY)

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
`int viewId`	ID of view to adjust the transforms pivot point about Y
`float transformPivotY`	Y location of the pivot point.

setTranslation

Added in 2.2.0-rc01

public void setTranslation(int viewId, float translationX, float translationY)

Adjust the post-layout translation of a view.

Parameters
`int viewId`	ID of view to adjust its translation in X &Y
`float translationX`	the translation in X
`float translationY`	the translation in Y

setTranslationX

Added in 2.2.0-rc01

public void setTranslationX(int viewId, float translationX)

Adjust the post-layout X translation of a view.

Parameters
`int viewId`	ID of view to translate in X
`float translationX`	the translation in X

setTranslationY

Added in 2.2.0-rc01

public void setTranslationY(int viewId, float translationY)

Adjust the post-layout Y translation of a view.

Parameters
`int viewId`	ID of view to to translate in Y
`float translationY`	the translation in Y

setTranslationZ

Added in 2.2.0-rc01

public void setTranslationZ(int viewId, float translationZ)

Adjust the translation in Z of a view.

Parameters
`int viewId`	ID of view to adjust
`float translationZ`	the translationZ

setValidateOnParse

Added in 2.2.0-rc01

public void setValidateOnParse(boolean validate)

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

Parameters
`boolean validate`

setVerticalBias

Added in 2.2.0-rc01

public void setVerticalBias(int viewId, float bias)

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

Parameters
`int viewId`	ID of view to adjust the vertical
`float bias`	the new bias 0.5 is in the middle

setVerticalChainStyle

Added in 2.2.0-rc01

public void setVerticalChainStyle(int viewId, int chainStyle)

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

setVerticalWeight

Added in 2.2.0-rc01

public void setVerticalWeight(int viewId, float weight)

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
`int viewId`	ID of view to adjust its VerticalWeight
`float weight`	the weight that we can use to distribute the vertical space

setVisibility

Added in 2.2.0-rc01

public void setVisibility(int viewId, int visibility)

Adjust the visibility of a view.

Parameters
`int viewId`	ID of view to adjust the vertical
`int visibility`	the visibility

setVisibilityMode

Added in 2.2.0-rc01

public void setVisibilityMode(int viewId, int visibilityMode)

ConstraintSet will not setVisibility. VISIBILITY_MODE_IGNORE or VISIBILITY_MODE_NORMAL.

Parameters
`int viewId`	ID of view
`int visibilityMode`

Added in 2.2.0-rc01

public void writeState(Writer writer, ConstraintLayout layout, int flags)

Write the state to a Writer

Parameters
`Writer writer`
`ConstraintLayout layout`
`int flags`

Throws
`java.io.IOException`

ConstraintSet

Summary

Nested types

Constants

Public fields

Public constructors

Public methods

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 fields

derivedState

mIdString

mRotate

Public constructors

ConstraintSet

Public methods

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