Summary: Ctors | Methods | Inherited Methods

ConstraintsChangedListener

This package is part of the Android support library which is no longer maintained. The Constraint Layout support library has been superseded by the AndroidX Constraint Layout library, which is part of Jetpack. The ConstraintsChangedListener class has been superseded by androidx.constraintlayout.widget.ConstraintsChangedListener. We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX.

public abstract class ConstraintsChangedListener
extends Object

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

Added in 2.0

Callbacks on state change

Summary

Public constructors
`ConstraintsChangedListener()`

Public methods
`void`	`postLayoutChange(int stateId, int constraintId)` called after layout happens
`void`	`preLayoutChange(int stateId, int constraintId)` called before layout happens

From class


        
          java.lang.Object

public ConstraintsChangedListener ()

public void postLayoutChange (int stateId, 
                int constraintId)

called after layout happens

Parameters
`stateId`	`int`: -1 if state unknown, otherwise the current state
`constraintId`	`int`: the current constraintSet id we transitioned to

public void preLayoutChange (int stateId, 
                int constraintId)

called before layout happens

Parameters
`stateId`	`int`: -1 if state unknown, otherwise the state we will transition to
`constraintId`	`int`: the constraintSet id that we will transition to