com.facebook.litho

Class DoubleMeasureFixUtil

java.lang.Object

com.facebook.litho.DoubleMeasureFixUtil

public class DoubleMeasureFixUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
DoubleMeasureFixUtil()

Method Summary

Modifier and Type	Method and Description
static int	correctWidthSpecForAndroidDoubleMeasureBug(Resources resources, PackageManager packageManager, int widthSpec) Correction for an Android bug on some devices with "special" densities where the system will double-measure with slightly different widths in the same traversal.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DoubleMeasureFixUtil

public DoubleMeasureFixUtil()

Method Detail

correctWidthSpecForAndroidDoubleMeasureBug

public static int correctWidthSpecForAndroidDoubleMeasureBug(Resources resources,
                                                             PackageManager packageManager,
                                                             int widthSpec)

Correction for an Android bug on some devices with "special" densities where the system will double-measure with slightly different widths in the same traversal. See https://issuetracker.google.com/issues/73804230 for more details.

This hits Litho extra-hard because we create LayoutStates in measure in many places, so we try to correct for it here by replacing the widthSpec given to us from above with what we think the correct one is. Even though the double measure will still happen, the incorrect width will not propagate to any vertical RecyclerViews contained within.