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Asked: 2026-05-22T14:33:50+00:00

I have an OpenSL ES function call that causes no problems in one application,

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I have an OpenSL ES function call that causes no problems in one application, but causes a problem in another application, both run on the same device.

The line is:

result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);

Where result is of the type SLresult, engineObject is of the type SLObjectItf

The error I seem to get is:

05-19 11:56:27.007: ERROR/libOpenSLES(1425): slCreateEngine while another engine 0x299fa0 is active

It seems this is not logged from my code, but maybe it is caused by it? So what could cause this line to produce an error in one app, but not in the other?

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1 Answer

  1. Editorial Team

    As it happens to be, it was partly Android’s Activity life-cycle which caused the error, but mostly my own fault. It was caused by the onCreate() and onResume() methods Android provides for an Activity. I never thought of the fact that onResume() also get’s called when an Activity is started. Because of this, I never realized that I had a 2nd call to the slCreateEngine function…..

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