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
startMethodTracing(). In particular, it enables
tracing of events that occur across multiple processes.
For information about using the Systrace tool, read Analyzing Display and Performance with Systrace.
Writes a trace message to indicate that a given section of code has begun.
Writes a trace message to indicate that a given section of code has ended.
void beginSection (String sectionName)
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.
void endSection ()
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