How to do Activity profiling in Android

I have developed one android application and now I'm trying to do the profiling of my android application. So for this I got a good link here:

http://developer.android.com/guide/developing/debugging/debugging-tracing.html#format

Using this info I'm trying to profile my activity using Debug class that is in the oncreate() method of my activity. I'm using

Debug.startMethodTracing("calc");

to start method tracing and add the traces to calc.trace

and I'm stopping the method tracing in my onDestroy().

Debug.stopMethodTracing();

My problem is when I check the calc.trace, the file is always of 0 size. No traces have been updated, and I don't know why.

In the manifest I have added the required permission for this.

I think it is just a typo. Use Debug.stopMethodTracing() in onDestroy(). (note that in you post it is Debug.startMethodTracing();) Or may be you activity just don't been destroyed, so yo can try to add Debug.stopMethodTracing() to onPause()