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This package is part of the Android support library which is no longer maintained. The Constraint Layout support library has been superseded by the AndroidX Constraint Layout library, which is part of Jetpack. The Group class has been superseded by androidx.constraintlayout.widget.Group.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