ConstraintLayout2.0一篇写不完之约束到底写在哪

android:id

Id of the View

[ConstraintLayout attributes]

Any attribute that is part of ContraintLayout layout is allowed

[Standard View attributes]

A collection of view attributes supported by the system (see below)

transitionEasing

define an easing curve to be used when animating from this point (e.g. curve(1.0,0,0,1.0)) or key words {standard | accelerate | decelerate | linear }

pathMotionArc

the path will move in arc (quarter eclipses) or key words {startVertical | startHorizontal | none }

transitionPathRotate

(float) rotate object relative to path taken

drawPath

draw the path the layout will animate animate

progress

call method setProgress(float) on this view (used to talk to nested ConstraintLayouts etc.)

call a set"name" method via reflection

Attributes for the ConstraintLayout e.g. layout_constraintTop_toTopOf

currently only visibility, alpha, motionProgress,layout_constraintTag.

All the view transform API such as android:rotation.

Motion Layout control commands such as transitionEasing and pathMotionArc

[ConstraintLayout attributes]

see for attribute

visibility

set the Visibility of the view. One of Visible, invisible or gone

alpha

setAlpha value

motionProgress

using reflection call setProgress

layout_constraintTag

a tagging string to identify the type of object

android:elevation

base z depth of the view.

android:rotation

rotation of the view, in degrees.

android:rotationX

rotation of the view around the x axis, in degrees.

android:rotationY

rotation of the view around the y axis, in degrees.

android:scaleX

scale of the view in the x direction

android:scaleY

scale of the view in the y direction.

android:translationX

translation in x of the view. This value is added post-layout to the left property of the view, which is set by its layout.

android:translationY

translation in y of the view. This value is added post-layout to the top property of the view, which is set by its layout

android:translationZ

translation in z of the view. This value is added to its elevation.

app:transformPivotTarget

transform target

android:transformPivotX

transform pivot x

android:transformPivotY

transform pivot y

transitionEasing

Defines an acceleration curve.

pathMotionArc

Says the object should move in a quarter ellipse unless the motion is vertical or horizontal

motionPathRotate

set the rotation to the path of the object + this angle.

drawPath

Debugging utility to draw the motion of the path

animateCircleAngleTo

Animate with circle

animateRelativeTo

Animate relative to target

quantizeMotionSteps

quantize animation with steps

attributeName

The name of the attribute. Case sensitive. ( MyAttr will look for method setMyAttr(...)

customColorValue

The value is a color looking setMyAttr(int )

customIntegerValue

The value is an integer looking setMyAttr(int )

customFloatValue

The value is a float looking setMyAttr(float )

customStringValue

The value is a String looking setMyAttr(String )

customDimension

The value is a dimension looking setMyAttr(float )

customBoolean

The value is true or false looking setMyAttr(boolean )