http://wiki.processing.org/w/Android#What_about_Multi-touch.2C_GPS.2C_SMS.2C_Compass.3F

and this this

https://forum.processing.org/topic/finger-touch-event

and this

https://code.google.com/p/ketai/

Other examples are these:

http://victorcheung.igloocommunities.com/blogs/surface/usingmultitouchinandroidwithprocessing

http://www.akeric.com/blog/?p=1411

https://forum.processing.org/topic/a-basic-multi-touch-gesture-demo-for-android

Maybe someone wants try those sketches.

I get various errors when trying to compile them.

EDIT:

 The example in the third link works if you add these lines:

2. /**
3. * This is multi-touch sketch by Victor Cheung
4. * http://victorcheung.igloocommunities.com/blogs/surface/usingmultitouchinandroidwithprocessing
5. *
6. */
7. 
   
8. import android.view.MotionEvent;
9. 
   
10. float sw, sh, touchX, touchY; 
11. int pointerCount; 
12. ArrayList points; 
13. PFont f;  
14. void setup() { 
15.   //size doesn't really matter in an Android app 
16.   size(displayWidth, displayHeight); 
17.   println(displayWidth); 
18.   println(displayHeight);
19.   sw = displayWidth; 
20.   sh = displayHeight; 
21.   points = new ArrayList();
22.   f = createFont("Arial", 16);
23. }   
24. 
    
25. void draw() { 
26. 
    
27.   background(0); 
28.   smooth();  
29.   noFill();  
30.   stroke(255, 0, 0);  
31.   strokeWeight(2);  
32.   textFont(f);
33.   PVector tempPoint;
34. 
    
35.   for (int i=0; i<points.size(); i++) { 
36.     tempPoint = (PVector) points.get(i); 
37.     ellipse(tempPoint.x, tempPoint.y, 50, 50);
38.     text(tempPoint.x+", "+tempPoint.y, tempPoint.x+10, tempPoint.y-10);
39.   }
40. } 
41. 
    
42. 
    
43. public boolean surfaceTouchEvent(MotionEvent event) { 
44.   pointerCount = event.getPointerCount(); 
45.   println("Number of pointers: "+pointerCount); 
46.   points.clear(); 
47.   for (int i=1; i<=pointerCount; i++) { 
48.     points.add(new PVector(event.getX(i-1), event.getY(i-1)));
49.   }
50.   //if the event is a pressed gesture finishing,  
51.   // it means the lifting the last touch point 
52.   if (event.getActionMasked() == MotionEvent.ACTION_UP) points.clear(); 
53.   // if you want the variables for motionX/motionY, mouseX/mouseY etc.
54.   // to work properly, you'll need to call super.surfaceTouchEvent(). 
55. 
    
56.   return super.surfaceTouchEvent(event);
57. } 
58. 
    
59. /* if single touch is all you need, this would work just fine 
60. 
    
61. void mouseDragged() 
62. { 
63.   touchX = mouseX;  
64.   touchY = mouseY; 
65. } 
66. 
    
67. */

Seems like in Processing 1.5 android mode MotionEvent was imported automatically, thus there was no need to explicitly specify it. However Processing 2 doesn't do this automatically, so you have to do it manually). Also variables screenWidth and screenHeight are deprecated and not availble in P2.0

1. // Sketch taken from http://www.akeric.com/blog/?p=1411
2. // Eric Pavey - AkEric.com - 2010-12-29
3. // Example showing simple multi-touch detection in 'Processing - Android'.
4. // My Samsung Captivate (Galaxy S) can track 5 touch-points.
5. // Updated to work with Processing's surfaceTouchEvent instead of
6. // Android's dispatchTouchEvent.
7. 
   
8. // Should point out that API Level 9 has MotionEvent.PointerCoords class that
9. // expose some cool functionality, but I'm only on Level 7.
10. import android.view.MotionEvent;
11. 
    
12. String[] fontList;
13. PFont androidFont;
14. int circleBaseSize = 512; // change this to make the touche circles bigger\smaller.
15. 
    
16. void setup() {
17.   //size(screenWidth, screenHeight, A2D);
18.   size(displayWidth, displayHeight);
19.   // Fix the orientation so the sketch won't reset when rotated.
20.   orientation(PORTRAIT);
21.   stroke(255);
22.   smooth();
23.   // Setup Fonts:
24.   fontList = PFont.list();
25.   androidFont = createFont(fontList[0], 16, true);
26.   textFont(androidFont);
27.   textAlign(LEFT);
28. }
29. 
    
30. void draw() {
31.   background(0);
32. }
33. 
    
34. void infoCircle(float x, float y, float siz, int id) {
35.   // What is drawn on sceen when touched.
36.   float diameter = circleBaseSize * siz;
37.   noFill();
38.   ellipse(x, y, diameter, diameter);
39.   fill(0,255,0);
40.   ellipse(x, y, 8, 8);
41.   text( ("ID:"+ id + " " + int(x) + ", " + int(y) ), x-128, y-64);
42. }
43. 
    
44. //-----------------------------------------------------------------------------------------
45. // Override Processing's surfaceTouchEvent, which will intercept all
46. // screen touch events.  This code only runs when the screen is touched.
47. 
    
48. public boolean surfaceTouchEvent(MotionEvent me) {
49.   // Number of places on the screen being touched:
50.   int numPointers = me.getPointerCount();
51.   for(int i=0; i < numPointers; i++) {
52.     int pointerId = me.getPointerId(i);
53.     float x = me.getX(i);
54.     float y = me.getY(i);
55.     float siz = me.getSize(i);
56.     infoCircle(x, y, siz, pointerId);
57.   }
58.   // If you want the variables for motionX/motionY, mouseX/mouseY etc.
59.   // to work properly, you'll need to call super.surfaceTouchEvent().
60.   return super.surfaceTouchEvent(me);
61. }