event.getAction() //获取触控动作比如ACTION_DOWN  
event.getPointerCount(); //获取触控点的数量，比如2则可能是两个手指同时按压屏幕  
event.getPointerId(nID); //对于每个触控的点的细节，我们可以通过一个循环执行getPointerId方法获取索引  
event.getX(nID); //获取第nID个触控点的x位置  
event.getY(nID); //获取第nID个点触控的y位置  
event.getPressure(nID); //LCD可以感应出用户的手指压力，当然具体的级别由驱动和物理硬件决定的  
event.getDownTime() //按下开始时间  
event.getEventTime() // 事件结束时间  
event.getEventTime()-event.getDownTime()); //总共按下时花费时间 

public class MyView extends SurfaceView implements SurfaceHolder.Callback{  
  MultitouchVisible father;  
    
  private static final int MAX_TOUCHPOINTS = 10;   
  private static final String START_TEXT = "请随便触摸屏幕进行测试";   
  private Paint textPaint = new Paint();   
  private Paint touchPaints[] = new Paint[MAX_TOUCHPOINTS];   
  private int colors[] = new int[MAX_TOUCHPOINTS];   
  private int width, height;   
// private float scale = 1.0f;   
    
  public MyView(MultitouchVisible father) {  
    super(father);  
    // TODO Auto-generated constructor stub  
    this.father=father;  
    SurfaceHolder holder = getHolder();   
    holder.addCallback(this);   
    setFocusable(true); // 确保我们的View能获得输入焦点   
    setFocusableInTouchMode(true); // 确保能接收到触屏事件   
    init();   
  }  
   private void init() {   
     // 初始化10个不同颜色的画笔   
     textPaint.setColor(Color.WHITE);   
     colors[0] = Color.BLUE;   
     colors[1] = Color.RED;   
     colors[2] = Color.GREEN;   
     colors[3] = Color.YELLOW;   
     colors[4] = Color.CYAN;   
     colors[5] = Color.MAGENTA;   
     colors[6] = Color.DKGRAY;   
     colors[7] = Color.WHITE;   
     colors[8] = Color.LTGRAY;   
     colors[9] = Color.GRAY;   
     for (int i = 0; i < MAX_TOUCHPOINTS; i++) {  
       touchPaints[i] = new Paint();   
       touchPaints[i].setColor(colors[i]);  
     }  
  }   
   /*  
  * 处理触屏事件  
   */   
   @Override   
   public boolean onTouchEvent(MotionEvent event) {  
    // 获得屏幕触点数量   
     int pointerCount = event.getPointerCount();  
     if (pointerCount > MAX_TOUCHPOINTS) {   
       pointerCount = MAX_TOUCHPOINTS;   
       }   
     // 锁定Canvas,开始进行相应的界面处理   
     Canvas c = getHolder().lockCanvas();   
    if (c != null) {   
      c.drawColor(Color.BLACK);   
      if (event.getAction() == MotionEvent.ACTION_UP) {   
         // 当手离开屏幕时，清屏   
         }  
      else {   
         // 先在屏幕上画一个十字，然后画一个圆   
         for (int i = 0; i < pointerCount; i++) {   
          // 获取一个触点的坐标，然后开始绘制   
           int id = event.getPointerId(i);   
           int x = (int) event.getX(i);   
           int y = (int) event.getY(i);   
           drawCrosshairsAndText(x, y, touchPaints[id], i, id, c);   
         }   
         for (int i = 0; i < pointerCount; i++) {   
           int id = event.getPointerId(i);   
           int x = (int) event.getX(i);   
           int y = (int) event.getY(i);   
           drawCircle(x, y, touchPaints[id], c);  
         }  
      }  
      // 画完后，unlock   
       getHolder().unlockCanvasAndPost(c);  
    }  
    return true;  
  }   
   /**  
   * 画十字及坐标信息  
   */   
   private void drawCrosshairsAndText(int x, int y, Paint paint, int ptr,int id, Canvas c) {  
     c.drawLine(0, y, width, y, paint);   
     c.drawLine(x, 0, x, height, paint);   
     int textY = (int) (5 + 20 * ptr);   
     c.drawText("x" + ptr + "=" + x, 10 , textY, textPaint);   
     c.drawText("y" + ptr + "=" + y, 70 , textY, textPaint);   
     c.drawText("id" + ptr + "=" + id, width - 55 , textY, textPaint);  
   }   
  /**  
   * 画圆  
  */   
   private void drawCircle(int x, int y, Paint paint, Canvas c) {   
     c.drawCircle(x, y, 40 , paint);   
   }   
  @Override 
  public void surfaceChanged(SurfaceHolder holder, int format, int width,  
      int height) {  
    // TODO Auto-generated method stub  
    this.width = width;   
    this.height = height;   
    textPaint.setTextSize(14);   
    Canvas c = getHolder().lockCanvas();   
    if (c != null) {  
      // 背景黑色   
      c.drawColor(Color.BLACK);   
      float tWidth = textPaint.measureText(START_TEXT);   
      c.drawText(START_TEXT, width / 2 - tWidth / 2, height / 2, textPaint);   
      getHolder().unlockCanvasAndPost(c);   
    }   
  }  
  @Override 
  public void surfaceCreated(SurfaceHolder holder) {  
    // TODO Auto-generated method stub  
      
  }  
 
  @Override 
  public void surfaceDestroyed(SurfaceHolder holder) {  
    // TODO Auto-generated method stub  
      
  }  
} 

public class MultitouchVisible extends Activity {  
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    //隐藏标题栏   
    requestWindowFeature(Window.FEATURE_NO_TITLE);   
    //设置成全屏   
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,   
    WindowManager.LayoutParams.FLAG_FULLSCREEN);   
    //设置为上面的MTView   
    setContentView(new MyView(this));   
  }  
}