debugging - android trace file on device -

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is possible create trace file on devices or can use trace file on emulator?

cause rt-execption when use debug.startmethodtracing();

here exception:

05-11 09:34:27.687: error/androidruntime(5599): java.lang.runtimeexception:  unable open trace file '/sdcard/loop_loclistener.trace': permission denied

thanks


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