How to use startMethodTracing APIs on Android?

Posted by Rajorshi on Stack Overflow See other posts from Stack Overflow or by Rajorshi
Published on 2010-05-20T05:21:31Z Indexed on 2010/05/20 5:40 UTC
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I have recently started working on an app which has both Java and native components. I am trying to generate trace information for both components using Debug.startMethodTracing("myapp") and Debug.startNativeTracing() alternately. However, both are behaving unexpectedly.

When I use Debug.startMethodTracing("myapp"), I can see a file /sdcard/myapp.trace being created but it is always empty no matter how long I run my app. When I use Debug.startNativeTracing() and start the emulator with the -trace <tracename> switch, I see a message saying "Trace started", but when I try to run my app, the emulator crashes.

Am I missing something obvious here? How do I debug this problem?

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