Summary: Ctors | Methods | Protected Methods | Inherited Methods

Group

This package is part of the Android support library which is no longer maintained. The Constraint Layout support library has been superseded by the AndroidX Constraint Layout library, which is part of Jetpack. The Group class has been superseded by androidx.constraintlayout.widget.Group.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

public class Group
extends View

java.lang.Object
↳	View
	↳	android.support.constraint.Group

---

Added in 1.1

This class controls the visibility of a set of referenced widgets. Widgets are referenced by being added to a comma separated list of ids, e.g:

     <android.support.constraint.Group
              android:id="@+id/group"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:visibility="visible"
              app:constraint_referenced_ids="button4,button9" />
     
     

The visibility of the group will be applied to the referenced widgets. It's a convenient way to easily hide/show a set of widgets without having to maintain this set programmatically.

Multiple groups

Multiple groups can reference the same widgets -- in that case, the XML declaration order will define the final visibility state (the group declared last will have the last word).

Summary

Public constructors
Group(Context context)
Group(Context context, AttributeSet attrs)
Group(Context context, AttributeSet attrs, int defStyleAttr)

Public methods
int[]	getReferencedIds() Helpers typically reference a collection of ids
void	loadParameters(ConstraintSet.Constraint constraint, HelperWidget child, ConstraintLayout.LayoutParams layoutParams, mapIdToWidget)
void	resolveRtl(ConstraintWidget widget, boolean isRtl)
void	setReferencedIds(int[] ids) Helpers typically reference a collection of ids
void	updatePostConstraints(ConstraintLayout constainer)
void	updatePreLayout(ConstraintWidgetContainer container, Helper helper, map)

Protected methods
View[]	getViews(ConstraintLayout layout)

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

Group

public Group (Context context)

Parameters
context	Context

Group

public Group (Context context, 
                AttributeSet attrs)

Parameters
context	Context
attrs	AttributeSet

Group

public Group (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

Parameters
context	Context
attrs	AttributeSet
defStyleAttr	int

Public methods

getReferencedIds

public int[] getReferencedIds ()

Helpers typically reference a collection of ids

Returns
int[]	ids referenced

loadParameters

public void loadParameters (ConstraintSet.Constraint constraint, 
                HelperWidget child, 
                ConstraintLayout.LayoutParams layoutParams, 
                 mapIdToWidget)

Parameters
constraint	ConstraintSet.Constraint
child	HelperWidget
layoutParams	ConstraintLayout.LayoutParams
mapIdToWidget

resolveRtl

public void resolveRtl (ConstraintWidget widget, 
                boolean isRtl)

Parameters
widget	ConstraintWidget
isRtl	boolean

setReferencedIds

public void setReferencedIds (int[] ids)

Helpers typically reference a collection of ids

Parameters
ids	int

Returns
void	ids referenced

updatePostConstraints

public void updatePostConstraints (ConstraintLayout constainer)

Parameters
constainer	ConstraintLayout

updatePreLayout

public void updatePreLayout (ConstraintWidgetContainer container, 
                Helper helper, 
                 map)

Parameters
container	ConstraintWidgetContainer
helper	Helper
map

Protected methods

getViews

protected View[] getViews (ConstraintLayout layout)

Parameters
layout	ConstraintLayout

Returns
View[]