Unsatisfactory but functioning Android synthesis hack

 An unsatisfactory Android synthesis hack I tested this morning, I know there is a less deprecated way of doing this, but for now I'm happy that I've got a sine tone working through Android for Processing in Eclispe:

//the tone is generated when you press the screen, it works on my utterly rubbish Arnova 10b G3, //which, despite umpteen resets, has crazed dysfunctional calibration on the touch screen - a total lemon.

package processing.test.ansynth;

import processing.core.*; 

import android.view.MotionEvent; 

import android.view.KeyEvent; 

import android.app.Activity;

import android.graphics.Bitmap; 

import android.media.AudioFormat;

import android.media.AudioManager;

import android.media.AudioTrack;

import android.os.Bundle;

import android.os.Handler;

import java.io.*; 

import java.util.*; 

public class AnSynth extends PApplet {

public float sf;

    // originally from http://marblemice.blogspot.com/2010/04/generate-and-play-tone-in-android.html

    // and modified by Steve Pomeroy <steve@staticfree.info>

    private final int duration = 3; // seconds

    private final int sampleRate = 8000;

    private final int numSamples = duration * sampleRate;

    private final double sample[] = new double[numSamples];

    private final double freqOfTone = 440; // hz

    private final byte generatedSnd[] = new byte[2 * numSamples];

   // Handler handler = new Handler();

   public void setup(){   genTone();   playSound();

   

   }

   

public void draw(){

background(0, 0, 255);

fill(255, 0, 0);

     ellipse(width/2, height/2,80, 80);

     if(mousePressed){

     

     genTone();   

     playSound();

     

     }

}

   

    Handler handler = new Handler();

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

  //     setContentView(R.layout.main);

    }

    @Override

    protected void onResume() {

        super.onResume();

        // Use a new tread as this can take a while

        final Thread thread = new Thread(new Runnable() {

            public void run() {

            //    genTone();

                handler.post(new Runnable() {

                    public void run() {

                    //  genTone();

                    }

                });

            }

        });

        thread.start();

    }

    void genTone(){

        // fill out the array

        for (int i = 0; i < numSamples; ++i) {

            sample[i] = Math.sin(2 * Math.PI * i / (sampleRate/freqOfTone));

       

        }

        // convert to 16 bit pcm sound array

        // assumes the sample buffer is normalised.

        int idx = 0;

        for (final double dVal : sample) {

            // scale to maximum amplitude

            final short val = (short) ((dVal * 32767));

            // in 16 bit wav PCM, first byte is the low order byte

            generatedSnd[idx++] = (byte) (val & 0x00ff);

            generatedSnd[idx++] = (byte) ((val & 0xff00) >>> 8);

       

            sf = (float)(val & 0x00ff);

        }

    }

    void playSound(){

        @SuppressWarnings("deprecation") //crap I know

final AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,

                sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO,

                AudioFormat.ENCODING_PCM_16BIT, numSamples,

                AudioTrack.MODE_STATIC);

        audioTrack.write(generatedSnd, 0, generatedSnd.length);

        audioTrack.play();

    }

}