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AtraceLogger

public class AtraceLogger
extends Object

java.lang.Object
   ↳ android.support.test.rule.logging.AtraceLogger


Class contains helper methods to dump atrace info asynchronously while running the test case.

This API is currently in beta.

Summary

Public methods

void atraceStart(Set<String> traceCategoriesSet, int atraceBufferSize, int dumpIntervalSecs, File destDirectory, String traceFileName)

Method to start atrace and dump the data at regular interval.

void atraceStop()

Method to stop the atrace and write the atrace data cached in byte array list to file.

static AtraceLogger getAtraceLoggerInstance(Instrumentation instrumentation)

To make sure only one instance of atrace logger is created.

Inherited methods

From class java.lang.Object

Public methods

atraceStart

void atraceStart (Set<String> traceCategoriesSet, 
                int atraceBufferSize, 
                int dumpIntervalSecs, 
                File destDirectory, 
                String traceFileName)

Method to start atrace and dump the data at regular interval. Note : Trace info will not be captured during the dumping if there are multiple dumps between the atraceStart and atraceStop

Parameters
traceCategoriesSet Set: Set of atrace categories (i.e atrace --list_categories)

atraceBufferSize int: Size of the circular buffer in kb

dumpIntervalSecs int: Periodic interval to dump data from circular buffer

destDirectory File: Directory under which atrace logs are stored

traceFileName String: is optional parameter.Atrace files are dumped under destDirectory. traceFileName will be indexed based on number of dumps between atraceStart and atraceStop under destDirectory. If traceFileName is null or empty "atrace" name will be used for indexing the files and stored under destDirectory

Throws
IOException

atraceStop

void atraceStop ()

Method to stop the atrace and write the atrace data cached in byte array list to file.

Throws
IOException
InterruptedException
IOException

getAtraceLoggerInstance

AtraceLogger getAtraceLoggerInstance (Instrumentation instrumentation)

To make sure only one instance of atrace logger is created. Note : Supported only for minsdk version 23 and above because of UiAutomation executeShellCommand limitation.

Parameters
instrumentation Instrumentation: Used to execute atrace shell commands

Returns
AtraceLogger instance of the AtraceLogger