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This package is part of the Android support library which is no longer maintained. The Constraint Layout support library has been superseded by the AndroidX Constraint Layout library, which is part of Jetpack. The ConstraintsChangedListener class has been superseded by androidx.constraintlayout.widget.ConstraintsChangedListener.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

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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

Inherited methods
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait(long arg0, int arg1) final void wait(long arg0) final void wait()

Public constructors

ConstraintsChangedListener

public ConstraintsChangedListener ()

Public methods

postLayoutChange

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

preLayoutChange

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