Android Code Example: ToneGenerator (from https://www.codota.com/android/scenarios/52fcbd00da0abfc92ed33c9c/android.media.ToneGenerator?tag=dragonfly)

ToneGenerator.java

toneGen1 = new ToneGenerator(AudioManager.STREAM_MUSIC, 100);
toneGen2 = new ToneGenerator(AudioManager.STREAM_MUSIC, 50);
 
if (toneGen1.startTone(ToneGenerator.TONE_DTMF_1)) {
        Thread.sleep(100);
        if (toneGen2.startTone(ToneGenerator.TONE_DTMF_2)) {
            Thread.sleep(500);
            toneGen1.stopTone();
            Thread.sleep(100);
            toneGen2.stopTone();
        } else { 
            toneGen1.stopTone();
            result = false;
        } 
    } else { 
        result = false;
    } 
 
    toneGen1.release();
    toneGen2.release();
    return result;
}