ConstraintLayout.LayoutParams

public static final int BASELINE = 5

The baseline of the text in a view.

public static final int BOTTOM = 4

The bottom side of a view.

public static final int CHAIN_PACKED = 2

Chain packed style

public static final int CHAIN_SPREAD = 0

Chain spread style

public static final int CHAIN_SPREAD_INSIDE = 1

Chain spread inside style

public static final int CIRCLE = 8

Circle reference from a view.

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

public static final int GONE_UNSET = -2147483648

Defines an id that is not set.

public static final int HORIZONTAL = 0

The horizontal orientation.

public static final int LEFT = 1

The left side of a view.

public static final int MATCH_CONSTRAINT = 0

Dimension will be controlled by constraints.

public static final int MATCH_CONSTRAINT_PERCENT = 2

Set matchConstraintDefault* percent to be based on a percent of another dimension (by default, the parent) Use to set the matchConstraintDefaultWidth and matchConstraintDefaultHeight

public static final int MATCH_CONSTRAINT_SPREAD = 0

Set matchConstraintDefault* spread as much as possible within its constraints. Use to set the matchConstraintDefaultWidth and matchConstraintDefaultHeight

public static final int MATCH_CONSTRAINT_WRAP = 1

Set matchConstraintDefault* default to the wrap content size. Use to set the matchConstraintDefaultWidth and matchConstraintDefaultHeight

public static final int PARENT_ID = 0

References the id of the parent.

public static final int RIGHT = 2

The right side of a view.

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

public static final int TOP = 3

The top of a view.

public static final int UNSET = -1

Defines an id that is not set.

public static final int VERTICAL = 1

The vertical orientation.

public int baselineMargin

The baseline margin.

public int baselineToBaseline

Constrains the baseline of a child to the baseline of a target child (contains the target child id).

public int baselineToBottom

Constrains the baseline of a child to the bottom of a target child (contains the target child id).

public int baselineToTop

Constrains the baseline of a child to the top of a target child (contains the target child id).

public int bottomToBottom

Constrains the bottom side of a child to the bottom side of a target child (contains the target child id).

public int bottomToTop

Constrains the bottom side of a child to the top side of a target child (contains the target child id).

public float circleAngle

The angle used for a circular constraint]

public int circleConstraint

Constrains the center of a child to the center of a target child (contains the target child id).

public int circleRadius

The radius used for a circular constraint

public boolean constrainedHeight

Specify if the vertical dimension is constrained in case both top &bottom constraints are set and the widget dimension is not a fixed dimension. By default, if a widget is set to WRAP_CONTENT, we will treat that dimension as a fixed dimension, meaning the dimension will not change regardless of constraints. Setting this attribute to true allows the dimension to change in order to respect constraints.

public boolean constrainedWidth

Specify if the horizontal dimension is constrained in case both left &right constraints are set and the widget dimension is not a fixed dimension. By default, if a widget is set to WRAP_CONTENT, we will treat that dimension as a fixed dimension, meaning the dimension will not change regardless of constraints. Setting this attribute to true allows the dimension to change in order to respect constraints.

public String constraintTag

Define a category of view to be used by helpers and motionLayout

public String dimensionRatio

The ratio information.

public int editorAbsoluteX

The design time location of the left side of the child. Used at design time for a horizontally unconstrained child.

public int editorAbsoluteY

The design time location of the right side of the child. Used at design time for a vertically unconstrained child.

public int endToEnd

Constrains the end side of a child to the end side of a target child (contains the target child id).

public int endToStart

Constrains the end side of a child to the start side of a target child (contains the target child id).

public int goneBaselineMargin

The baseline margin to use when the target is gone.

public int goneBottomMargin

The bottom margin to use when the target is gone.

public int goneEndMargin

The end margin to use when the target is gone.

public int goneLeftMargin

The left margin to use when the target is gone.

public int goneRightMargin

The right margin to use when the target is gone

public int goneStartMargin

The start margin to use when the target is gone.

public int goneTopMargin

The top margin to use when the target is gone.

public int guideBegin

The distance of child (guideline) to the top or left edge of its parent.

public int guideEnd

The distance of child (guideline) to the bottom or right edge of its parent.

public float guidePercent

The ratio of the distance to the parent's sides

public boolean guidelineUseRtl

The ratio of the distance to the parent's sides

public float horizontalBias

The ratio between two connections when the left and right (or start and end) sides are constrained.

public int horizontalChainStyle

If the child is the start of a horizontal chain, this attribute will drive how the elements of the chain will be positioned. 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

public float horizontalWeight

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

public int leftToLeft

Constrains the left side of a child to the left side of a target child (contains the target child id).

public int leftToRight

Constrains the left side of a child to the right side of a target child (contains the target child id).

public int matchConstraintDefaultHeight

Define how the widget vertical dimension is handled when set to MATCH_CONSTRAINT

• MATCH_CONSTRAINT_SPREAD -- the default. The dimension will expand up to the constraints, minus margins
• MATCH_CONSTRAINT_WRAP -- DEPRECATED -- use instead WRAP_CONTENT and constrainedWidth=true The dimension will be the same as WRAP_CONTENT, unless the size ends up too large for the constraints; in that case the dimension will expand up to the constraints, minus margins This attribute may not be applied if the widget is part of a chain in that dimension.
• MATCH_CONSTRAINT_PERCENT -- The dimension will be a percent of another widget (by default, the parent)

public int matchConstraintDefaultWidth

Define how the widget horizontal dimension is handled when set to MATCH_CONSTRAINT

• MATCH_CONSTRAINT_SPREAD -- the default. The dimension will expand up to the constraints, minus margins
• MATCH_CONSTRAINT_WRAP -- DEPRECATED -- use instead WRAP_CONTENT and constrainedWidth=true The dimension will be the same as WRAP_CONTENT, unless the size ends up too large for the constraints; in that case the dimension will expand up to the constraints, minus margins This attribute may not be applied if the widget is part of a chain in that dimension.
• MATCH_CONSTRAINT_PERCENT -- The dimension will be a percent of another widget (by default, the parent)

public int matchConstraintMaxHeight

Specify a maximum height size for the widget. It will only apply if the size of the widget is set to MATCH_CONSTRAINT. Don't apply if the widget is part of a vertical chain.

public int matchConstraintMaxWidth

Specify a maximum width size for the widget. It will only apply if the size of the widget is set to MATCH_CONSTRAINT. Don't apply if the widget is part of a horizontal chain.

public int matchConstraintMinHeight

Specify a minimum height size for the widget. It will only apply if the size of the widget is set to MATCH_CONSTRAINT. Don't apply if the widget is part of a vertical chain.

public int matchConstraintMinWidth

Specify a minimum width size for the widget. It will only apply if the size of the widget is set to MATCH_CONSTRAINT. Don't apply if the widget is part of a horizontal chain.

public float matchConstraintPercentHeight

Specify the percentage when using the match constraint percent mode. From 0 to 1.

public float matchConstraintPercentWidth

Specify the percentage when using the match constraint percent mode. From 0 to 1.

public int rightToLeft

Constrains the right side of a child to the left side of a target child (contains the target child id).

public int rightToRight

Constrains the right side of a child to the right side of a target child (contains the target child id).

public int startToEnd

Constrains the start side of a child to the end side of a target child (contains the target child id).

public int startToStart

Constrains the start side of a child to the start side of a target child (contains the target child id).

public int topToBottom

Constrains the top side of a child to the bottom side of a target child (contains the target child id).

public int topToTop

Constrains the top side of a child to the top side of a target child (contains the target child id).

public float verticalBias

The ratio between two connections when the top and bottom sides are constrained.

public int verticalChainStyle

If the child is the start of a vertical chain, this attribute will drive how the elements of the chain will be positioned. 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 vertical bias attribute of the child will then affect the positioning of the packed elements

public float verticalWeight

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

public int wrapBehaviorInParent

Specify how this view is taken in account during the parent's wrap computation Can be either of: WRAP_BEHAVIOR_INCLUDED the widget is taken in account for the wrap (default) WRAP_BEHAVIOR_HORIZONTAL_ONLY the widget will be included in the wrap only horizontally WRAP_BEHAVIOR_VERTICAL_ONLY the widget will be included in the wrap only vertically WRAP_BEHAVIOR_SKIPPED the widget is not part of the wrap computation

public LayoutParams(ViewGroup.LayoutParams params)

Create a LayoutParams base on an existing layout Params

public String getConstraintTag()

Tag that can be used to identify a view as being a member of a group. Which can be used for Helpers or in MotionLayout

public void reset()

Reset the ConstraintWidget

public void validate()

validate the layout