ConstraintProperties

public class ConstraintProperties
extends Object

java.lang.Object
   ↳ android.support.constraint.ConstraintProperties


Added in 2.0

ConstraintProperties provides an easy to use api to update the layout params of ConstraintLayout children

Summary

Constants

int BASELINE

The baseline of the text in a view.

int BOTTOM

The bottom side of a view.

int END

The right side of a view in right to left languages.

int LEFT

The left side of a view.

int MATCH_CONSTRAINT

Dimension will be controlled by constraints

int PARENT_ID

References the id of the parent.

int RIGHT

The right side of a view.

int START

The left side of a view in left to right languages.

int TOP

The top of a view.

int UNSET

Used to indicate a parameter is cleared or not set

int WRAP_CONTENT

Dimension will set by the view's content

Fields

public static final int MATCH_CONSTRAINT_SPREAD

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

public static final int MATCH_CONSTRAINT_WRAP

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

Public constructors

ConstraintProperties(View view)

Public methods

ConstraintProperties addToHorizontalChain(int leftId, int rightId)

Adds the view to a horizontal chain.

ConstraintProperties addToHorizontalChainRTL(int leftId, int rightId)

Adds the view to a horizontal chain using RTL attributes.

ConstraintProperties addToVerticalChain(int topId, int bottomId)

Adds a view to a vertical chain.

ConstraintProperties alpha(float alpha)

Adjust the alpha of a view.

void apply()
ConstraintProperties center(int firstID, int firstSide, int firstMargin, int secondId, int secondSide, int secondMargin, float bias)

Center view between the other two widgets.

ConstraintProperties centerHorizontally(int toView)

Centers the view horizontally relative to toView's position.

ConstraintProperties centerHorizontally(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.

ConstraintProperties centerHorizontallyRtl(int toView)

Centers the view horizontally relative to toView's position.

ConstraintProperties centerHorizontallyRtl(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.

ConstraintProperties centerVertically(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.

ConstraintProperties centerVertically(int toView)

Centers the view vertically relative to toView's position.

ConstraintProperties connect(int startSide, int endID, int endSide, int margin)

Create a constraint between two widgets.

ConstraintProperties constrainDefaultHeight(int height)

Sets how the height is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.

ConstraintProperties constrainDefaultWidth(int width)

Sets how the width is calculated ether MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD.

ConstraintProperties constrainHeight(int height)

Sets the height of the view.

ConstraintProperties constrainMaxHeight(int height)

Sets the maximum height of the view.

ConstraintProperties constrainMaxWidth(int width)

Sets the maximum width of the view.

ConstraintProperties constrainMinHeight(int height)

Sets the minimum height of the view.

ConstraintProperties constrainMinWidth(int width)

Sets the minimum width of the view.

ConstraintProperties constrainWidth(int width)

Sets the width of the view.

ConstraintProperties dimensionRatio(String ratio)

Constrains the views aspect ratio.

ConstraintProperties elevation(float elevation)

Set the elevation of a view.

ConstraintProperties goneMargin(int anchor, int value)

Sets the gone margin.

ConstraintProperties horizontalBias(float bias)

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

ConstraintProperties horizontalChainStyle(int chainStyle)

How the elements of the horizontal chain will be positioned.

ConstraintProperties horizontalWeight(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

ConstraintProperties margin(int anchor, int value)

Sets the margin.

ConstraintProperties removeConstraints(int anchor)

Remove a constraint from this view.

ConstraintProperties removeFromHorizontalChain()

Removes a view from a vertical chain.

ConstraintProperties removeFromVerticalChain()

Removes a view from a vertical chain.

ConstraintProperties rotation(float rotation)

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

ConstraintProperties rotationX(float rotationX)

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

ConstraintProperties rotationY(float rotationY)

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

ConstraintProperties scaleX(float scaleX)

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

ConstraintProperties scaleY(float scaleY)

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

ConstraintProperties transformPivot(float transformPivotX, float transformPivotY)

Set X and Y location of the pivot point around which the view will rotate and scale.

ConstraintProperties transformPivotX(float transformPivotX)

Set X location of the pivot point around which the view will rotate and scale.

ConstraintProperties transformPivotY(float transformPivotY)

Set Y location of the pivot point around which the view will rotate and scale.

ConstraintProperties translation(float translationX, float translationY)

Adjust the post-layout X and Y translation of a view.

ConstraintProperties translationX(float translationX)

Adjust the post-layout X translation of a view.

ConstraintProperties translationY(float translationY)

Adjust the post-layout Y translation of a view.

ConstraintProperties translationZ(float translationZ)

Adjust the post-layout translation in Z of a view.

ConstraintProperties verticalBias(float bias)

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

ConstraintProperties verticalChainStyle(int chainStyle)

How the elements of the vertical chain will be positioned.

ConstraintProperties verticalWeight(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

ConstraintProperties visibility(int visibility)

Adjust the visibility of a view.

Inherited methods

Constants

BASELINE

public static final int BASELINE

The baseline of the text in a view.

Constant Value: 5 (0x00000005)

BOTTOM

public static final int BOTTOM

The bottom side of a view.

Constant Value: 4 (0x00000004)

END

public static final int END

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

Constant Value: 7 (0x00000007)

LEFT

public static final int LEFT

The left side of a view.

Constant Value: 1 (0x00000001)

MATCH_CONSTRAINT

public static final int MATCH_CONSTRAINT

Dimension will be controlled by constraints

Constant Value: 0 (0x00000000)

PARENT_ID

public static final int PARENT_ID

References the id of the parent.

Constant Value: 0 (0x00000000)

RIGHT

public static final int RIGHT

The right side of a view.

Constant Value: 2 (0x00000002)

START

public static final int START

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

Constant Value: 6 (0x00000006)

TOP

public static final int TOP

The top of a view.

Constant Value: 3 (0x00000003)

UNSET

public static final int UNSET

Used to indicate a parameter is cleared or not set

Constant Value: -1 (0xffffffff)

WRAP_CONTENT

public static final int WRAP_CONTENT

Dimension will set by the view's content

Constant Value: -2 (0xfffffffe)

Fields

MATCH_CONSTRAINT_SPREAD

public static final int MATCH_CONSTRAINT_SPREAD

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

MATCH_CONSTRAINT_WRAP

public static final int MATCH_CONSTRAINT_WRAP

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

Public constructors

ConstraintProperties

public ConstraintProperties (View view)

Parameters
view View

Public methods

addToHorizontalChain

public ConstraintProperties addToHorizontalChain (int leftId, 
                int rightId)

Adds the view to a horizontal chain.

Parameters
leftId int: id of the view in chain to the left

rightId int: id of the view in chain to the right

Returns
ConstraintProperties this

addToHorizontalChainRTL

public ConstraintProperties addToHorizontalChainRTL (int leftId, 
                int rightId)

Adds the view to a horizontal chain using RTL attributes.

Parameters
leftId int: id of the view in chain to the left

rightId int: id of the view in chain to the right

Returns
ConstraintProperties this

addToVerticalChain

public ConstraintProperties addToVerticalChain (int topId, 
                int bottomId)

Adds a view to a vertical chain.

Parameters
topId int: view above.

bottomId int: view below

Returns
ConstraintProperties this

alpha

public ConstraintProperties alpha (float alpha)

Adjust the alpha of a view.

Parameters
alpha float: the alpha

Returns
ConstraintProperties this

apply

public void apply ()

center

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

Center view between the other two widgets.

Parameters
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

Returns
ConstraintProperties this

centerHorizontally

public ConstraintProperties centerHorizontally (int toView)

Centers the view horizontally relative to toView's position.

Parameters
toView int: ID of view to center on (or in)

Returns
ConstraintProperties this

centerHorizontally

public ConstraintProperties centerHorizontally (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.

Parameters
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)

Returns
ConstraintProperties this

centerHorizontallyRtl

public ConstraintProperties centerHorizontallyRtl (int toView)

Centers the view horizontally relative to toView's position.

Parameters
toView int: ID of view to center on (or in)

Returns
ConstraintProperties this

centerHorizontallyRtl

public ConstraintProperties centerHorizontallyRtl (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.

Parameters
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)

Returns
ConstraintProperties this

centerVertically

public ConstraintProperties centerVertically (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.

Parameters
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)

Returns
ConstraintProperties this

centerVertically

public ConstraintProperties centerVertically (int toView)

Centers the view vertically relative to toView's position.

Parameters
toView int: ID of view to center on (or in)

Returns
ConstraintProperties this

connect

public ConstraintProperties connect (int startSide, 
                int endID, 
                int endSide, 
                int margin)

Create a constraint between two widgets.

Parameters
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)

Returns
ConstraintProperties

constrainDefaultHeight

public ConstraintProperties constrainDefaultHeight (int height)

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

Parameters
height int: MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD

Returns
ConstraintProperties this

constrainDefaultWidth

public ConstraintProperties constrainDefaultWidth (int width)

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

Parameters
width int: MATCH_CONSTRAINT_WRAP or MATCH_CONSTRAINT_SPREAD

Returns
ConstraintProperties this

constrainHeight

public ConstraintProperties constrainHeight (int height)

Sets the height of the view.

Parameters
height int: the height of the view

Returns
ConstraintProperties this

constrainMaxHeight

public ConstraintProperties constrainMaxHeight (int height)

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

Parameters
height int: the maximum height of the view

Returns
ConstraintProperties this

constrainMaxWidth

public ConstraintProperties constrainMaxWidth (int width)

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

Parameters
width int: the maximum width of the view

Returns
ConstraintProperties this

constrainMinHeight

public ConstraintProperties constrainMinHeight (int height)

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

Parameters
height int: the minimum height of the view

Returns
ConstraintProperties this

constrainMinWidth

public ConstraintProperties constrainMinWidth (int width)

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

Parameters
width int: the minimum width of the view

Returns
ConstraintProperties this

constrainWidth

public ConstraintProperties constrainWidth (int width)

Sets the width of the view.

Parameters
width int: the width of the view

Returns
ConstraintProperties this

dimensionRatio

public ConstraintProperties dimensionRatio (String ratio)

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

Parameters
ratio String: The ratio of the width to height (width / height)

Returns
ConstraintProperties this

elevation

public ConstraintProperties elevation (float elevation)

Set the elevation of a view.

Parameters
elevation float: the elevation

Returns
ConstraintProperties this

goneMargin

public ConstraintProperties goneMargin (int anchor, 
                int value)

Sets the gone margin.

Parameters
anchor int: The side to adjust the margin on

value int: The new value for the margin

Returns
ConstraintProperties this

horizontalBias

public ConstraintProperties horizontalBias (float bias)

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

Parameters
bias float: the new bias 0.5 is in the middle

Returns
ConstraintProperties this

horizontalChainStyle

public ConstraintProperties horizontalChainStyle (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
chainStyle int: the weight that we can use to distribute the horizontal space

Returns
ConstraintProperties this

horizontalWeight

public ConstraintProperties horizontalWeight (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
weight float: the weight that we can use to distribute the horizontal space

Returns
ConstraintProperties this

margin

public ConstraintProperties margin (int anchor, 
                int value)

Sets the margin.

Parameters
anchor int: The side to adjust the margin on

value int: The new value for the margin

Returns
ConstraintProperties this

removeConstraints

public ConstraintProperties removeConstraints (int anchor)

Remove a constraint from this view.

Parameters
anchor int: the Anchor to remove constraint from

Returns
ConstraintProperties this

removeFromHorizontalChain

public ConstraintProperties removeFromHorizontalChain ()

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.

Returns
ConstraintProperties this

removeFromVerticalChain

public ConstraintProperties removeFromVerticalChain ()

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.

Returns
ConstraintProperties this

rotation

public ConstraintProperties rotation (float rotation)

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

Parameters
rotation float: the rotation about the Z axis

Returns
ConstraintProperties this

rotationX

public ConstraintProperties rotationX (float rotationX)

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

Parameters
rotationX float: the rotation about the X axis

Returns
ConstraintProperties this

rotationY

public ConstraintProperties rotationY (float rotationY)

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

Parameters
rotationY float: the rotation about the Y axis

Returns
ConstraintProperties this

scaleX

public ConstraintProperties scaleX (float scaleX)

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

Parameters
scaleX float: the scale in X

Returns
ConstraintProperties this

scaleY

public ConstraintProperties scaleY (float scaleY)

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

Parameters
scaleY float: the scale in Y

Returns
ConstraintProperties this

transformPivot

public ConstraintProperties transformPivot (float transformPivotX, 
                float transformPivotY)

Set X and Y location of the pivot point around which the view will rotate and scale.

Parameters
transformPivotX float: X location of the pivot point.

transformPivotY float: Y location of the pivot point.

Returns
ConstraintProperties this

transformPivotX

public ConstraintProperties transformPivotX (float transformPivotX)

Set X location of the pivot point around which the view will rotate and scale.

Parameters
transformPivotX float: X location of the pivot point.

Returns
ConstraintProperties this

transformPivotY

public ConstraintProperties transformPivotY (float transformPivotY)

Set Y location of the pivot point around which the view will rotate and scale.

Parameters
transformPivotY float: Y location of the pivot point.

Returns
ConstraintProperties this

translation

public ConstraintProperties translation (float translationX, 
                float translationY)

Adjust the post-layout X and Y translation of a view.

Parameters
translationX float: the translation in X

translationY float: the translation in Y

Returns
ConstraintProperties this

translationX

public ConstraintProperties translationX (float translationX)

Adjust the post-layout X translation of a view.

Parameters
translationX float: the translation in X

Returns
ConstraintProperties this

translationY

public ConstraintProperties translationY (float translationY)

Adjust the post-layout Y translation of a view.

Parameters
translationY float: the translation in Y

Returns
ConstraintProperties this

translationZ

public ConstraintProperties translationZ (float translationZ)

Adjust the post-layout translation in Z of a view. This is the preferred way to adjust the shadow.

Parameters
translationZ float: the translationZ

Returns
ConstraintProperties this

verticalBias

public ConstraintProperties verticalBias (float bias)

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

Parameters
bias float: the new bias 0.5 is in the middle

Returns
ConstraintProperties this

verticalChainStyle

public ConstraintProperties verticalChainStyle (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 horizontal bias attribute of the child will then affect the positioning of the packed elements

Parameters
chainStyle int: the weight that we can use to distribute the horizontal space

Returns
ConstraintProperties this

verticalWeight

public ConstraintProperties verticalWeight (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
weight float: the weight that we can use to distribute the vertical space

Returns
ConstraintProperties this

visibility

public ConstraintProperties visibility (int visibility)

Adjust the visibility of a view.

Parameters
visibility int: the visibility (View.VISIBLE, View.INVISIBLE, View.GONE)

Returns
ConstraintProperties this