Trace

Class Overview

Writes trace events to the system trace buffer. These trace events can be collected and visualized using the Systrace tool.

This tracing mechanism is independent of the method tracing mechanism offered by startMethodTracing(). In particular, it enables tracing of events that occur across multiple processes.

Summary

Public Methods
static void	beginSection(String sectionName) Writes a trace message to indicate that a given section of code has begun.
static void	endSection() Writes a trace message to indicate that a given section of code has ended.

Public Methods

static void

beginSection(String sectionName)

Writes a trace message to indicate that a given section of code has begun.

static void

endSection()

Writes a trace message to indicate that a given section of code has ended.

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Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Methods

public static void beginSection (String sectionName)

Added in API level 18

Writes a trace message to indicate that a given section of code has begun. This call must be followed by a corresponding call to endSection() on the same thread.

At this time the vertical bar character '|', newline character '\n', and null character '\0' are used internally by the tracing mechanism. If sectionName contains these characters they will be replaced with a space character in the trace.

Parameters

sectionName	The name of the code section to appear in the trace. This may be at most 127 Unicode code units long.

public static void endSection ()

Added in API level 18

Writes a trace message to indicate that a given section of code has ended. This call must be preceeded by a corresponding call to beginSection(String). Calling this method will mark the end of the most recently begun section of code, so care must be taken to ensure that beginSection / endSection pairs are properly nested and called from the same thread.

Results

Interfaces

Classes

Enums

Exceptions

Class Overview

Summary

Public Methods

public static void beginSection (String sectionName)

Parameters

public static void endSection ()

java.lang.Object
↳	android.os.Trace