Threads in java module

class AKAudio{
	BBAndroidGame game;
	int cc=0;
	Thread t;
	int sr = 44100;
	boolean isRunning=true;
	AudioTrack audioTrack=null;

	int Play(){
		t = new Thread() {
			public void run() {
				// set process priority
//				setPriority(Thread.MAX_PRIORITY);
				// set the buffer size
				int buffsize = AudioTrack.getMinBufferSize(sr, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT);
				// create an audiotrack object
				audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sr, AudioFormat.CHANNEL_OUT_MONO,
                                  AudioFormat.ENCODING_PCM_16BIT, buffsize,
                                  AudioTrack.MODE_STREAM);

				short samples[] = new short[buffsize];
				int amp = 10000;
				double twopi = 8.*Math.atan(1.);
				double fr = 440.f;
				double ph = 0.0;

				// start audio
				audioTrack.play();

				// synthesis loop
				while(isRunning){
					fr =  440 + 440;
					for(int i=0; i < buffsize; i++){
						samples[i] = (short) (amp*Math.sin(ph));
						ph += twopi*fr/sr;
					}
					audioTrack.write(samples, 0, buffsize);
				}	
			}
		};
		return 1;
	}
	
	int getPlaybackHeadPosition(){
		return audioTrack.getPlaybackHeadPosition();
	}
	int Stop(){
		audioTrack.stop();
		audioTrack.release();
		t=null;
		return 1;
	}
	

}

Import mojo
Import AK


Class Test Extends App
	Field a:AKAudio

	Method OnCreate ()
		SetUpdateRate 10
		a=New AKAudio
		a.Play();
	End

	Method OnUpdate ()

	End

	Method OnRender ()
		Cls 32, 64, 128						
		SetColor 255,255,255
		DrawText a.getPlaybackHeadPosition(),0,0
	End

End


Function Main ()
	New Test
End

int getPlaybackHeadPosition(){
	if (audioTrack==null)
		return 0;
	else
		return audioTrack.getPlaybackHeadPosition();
}