ConstraintLayoutStatistics

Artifact: androidx.constraintlayout:constraintlayout

View Source

Added in 2.2.0-alpha13

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Kotlin |Java

class ConstraintLayoutStatistics

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This provide metrics of the complexity of the layout that is being solved. The intent is for developers using the too to track the evolution of their UI Typically the developer will monitor the computations on every callback of mConstraintLayout.addOnLayoutChangeListener(this::callback);

Summary

Constants
const Int	DURATION_OF_CHILD_MEASURES = 5
const Int	DURATION_OF_LAYOUT = 7
const Int	DURATION_OF_MEASURES = 6
const Int	NUMBER_OF_CHILD_MEASURES = 4
const Int	NUMBER_OF_CHILD_VIEWS = 3
const Int	NUMBER_OF_EQUATIONS = 9
const Int	NUMBER_OF_LAYOUTS = 1
const Int	NUMBER_OF_ON_MEASURES = 2
const Int	NUMBER_OF_SIMPLE_EQUATIONS = 10
const Int	NUMBER_OF_VARIABLES = 8

Public constructors
ConstraintLayoutStatistics(constraintLayout: ConstraintLayout!) Measure performance information about ConstraintLayout
ConstraintLayoutStatistics(copy: ConstraintLayoutStatistics!) Copy a layout Stats useful for comparing two stats

Public functions
Unit	attach(constraintLayout: ConstraintLayout!) Attach to a ConstraintLayout to gather statistics on its layout performance
ConstraintLayoutStatistics!	clone() Create a copy of the statistics
Unit	detach() Detach from a ConstraintLayout
Long	getValue(type: Int) get the value of a statistic
Unit	logSummary(tag: String!) Log a summary of the statistics
Unit	logSummary(tag: String!, prev: ConstraintLayoutStatistics!) log a summary of the stats compared to another statics
Unit	reset() Clear the current metrics

Constants

DURATION_OF_CHILD_MEASURES

Added in 2.2.0-alpha13

const val DURATION_OF_CHILD_MEASURES = 5: Int

DURATION_OF_LAYOUT

Added in 2.2.0-alpha13

const val DURATION_OF_LAYOUT = 7: Int

DURATION_OF_MEASURES

Added in 2.2.0-alpha13

const val DURATION_OF_MEASURES = 6: Int

NUMBER_OF_CHILD_MEASURES

Added in 2.2.0-alpha13

const val NUMBER_OF_CHILD_MEASURES = 4: Int

NUMBER_OF_CHILD_VIEWS

Added in 2.2.0-alpha13

const val NUMBER_OF_CHILD_VIEWS = 3: Int

NUMBER_OF_EQUATIONS

Added in 2.2.0-alpha13

const val NUMBER_OF_EQUATIONS = 9: Int

NUMBER_OF_LAYOUTS

Added in 2.2.0-alpha13

const val NUMBER_OF_LAYOUTS = 1: Int

NUMBER_OF_ON_MEASURES

Added in 2.2.0-alpha13

const val NUMBER_OF_ON_MEASURES = 2: Int

NUMBER_OF_SIMPLE_EQUATIONS

Added in 2.2.0-alpha13

const val NUMBER_OF_SIMPLE_EQUATIONS = 10: Int

NUMBER_OF_VARIABLES

Added in 2.2.0-alpha13

const val NUMBER_OF_VARIABLES = 8: Int

Public constructors

ConstraintLayoutStatistics

Added in 2.2.0-alpha13

ConstraintLayoutStatistics(constraintLayout: ConstraintLayout!)

Measure performance information about ConstraintLayout

Parameters
constraintLayout: ConstraintLayout!

ConstraintLayoutStatistics

Added in 2.2.0-alpha13

ConstraintLayoutStatistics(copy: ConstraintLayoutStatistics!)

Copy a layout Stats useful for comparing two stats

Parameters
copy: ConstraintLayoutStatistics!

Public functions

attach

Added in 2.2.0-alpha13

fun attach(constraintLayout: ConstraintLayout!): Unit

Attach to a ConstraintLayout to gather statistics on its layout performance

Parameters
constraintLayout: ConstraintLayout!

clone

Added in 2.2.0-alpha13

fun clone(): ConstraintLayoutStatistics!

Create a copy of the statistics

Returns
ConstraintLayoutStatistics!	a copy

detach

Added in 2.2.0-alpha13

fun detach(): Unit

Detach from a ConstraintLayout

getValue

Added in 2.2.0-alpha13

fun getValue(type: Int): Long

get the value of a statistic

Parameters
type: Int

Returns
Long

logSummary

Added in 2.2.0-alpha13

fun logSummary(tag: String!): Unit

Log a summary of the statistics

Parameters
tag: String!

logSummary

Added in 2.2.0-alpha13

fun logSummary(tag: String!, prev: ConstraintLayoutStatistics!): Unit

log a summary of the stats compared to another statics

Parameters
tag: String!	used in Log.v(tag, ...)
prev: ConstraintLayoutStatistics!	the previous stats to compare to

reset

Added in 2.2.0-alpha13

fun reset(): Unit

Clear the current metrics