Muting the microphone android -

I'm trying to toggle on the Android mobile microphone. Application Freezes if I run the mute and unmute in the loop, 500ms say that with a delay. Is there a specific reason why mobile behaves like this? (Motorola Droid is also not able to mute the phone) though all other mobile phones are capable of doing it.

It runs in a loop for 20 times

  Audio service .SetfoneMoot (true); Try {Thread.sleep (500, 40); } Grip (Interrupted ejection) {// TODO Auto-Generated Catch Block e.printStackTrace (); } AudioService .setfile module (wrong);