Pong Game, Multitech problem [closed]

Question

I am trying to implement pong Game, I have two classes as "PongGameView" and "GameState"

i implemented multitouch event implemented in "PongGameView" and passing the x cooridantes of the pads to "GameState".

i wanted to achieve that pads should move independently when user touches bottom pad, only bottom pad should move, if user touches , top pad, only top pad should move. But i am having the problem that both pads are moving if i try to move one of the pad. how would i achieve this?

public class PongGameView extends SurfaceView  implements SurfaceHolder.Callback{

    private GameThread _thread;

    public PongGameView(Context context, AttributeSet attrs) {
        super(context, attrs);

        //So we can listen for events...
        SurfaceHolder holder = getHolder();
        holder.addCallback(this);
        setFocusable(true); 

        //and instantiate the thread
        _thread = new GameThread(holder, context, new Handler());
    } 

    private float _x = 0;
    private float _y = 0;
    private int mActivePointerId;

    public boolean onTouchEvent(MotionEvent event) {

        int action = MotionEventCompat.getActionMasked(event);
        // Get the index of the pointer associated with the action.
        int index = MotionEventCompat.getActionIndex(event);
        int xPos = -1;
        int yPos = -1;
        boolean flag=false;

        if (event.getPointerCount() > 1) {

            // The coordinates of the current screen contact, relative to 
            // the responding View or Activity.  
            xPos = (int)MotionEventCompat.getX(event, index);
            yPos = (int)MotionEventCompat.getY(event, index);
            flag=true;

        } else {
            // Single touch event
            xPos = (int)MotionEventCompat.getX(event, index);
            yPos = (int)MotionEventCompat.getY(event, index);
        }

        _thread.getGameState().surfaceTouched(xPos, yPos, flag );
        return true;
    }
}

my second class is

public class GameState {

    //the draw method
    public void draw(Canvas canvas, Paint paint) {

    //Clear the screen
    canvas.drawRGB(20, 20, 20);

    //set the colour
    paint.setARGB(200, 0, 200, 0);

    //draw the ball
    canvas.drawRect(new Rect(_ballX,_ballY,_ballX + _ballSize,_ballY + _ballSize), paint);

    paint.setARGB(200, 200,0, 0);
    //draw the bats
    canvas.drawRect(new Rect(_topBatX, _topBatY, _topBatX + _batLength, _topBatY + _batHeight), paint); //top bat

    paint.setARGB(200,0,0,200);

    canvas.drawRect(new Rect(_bottomBatX, _bottomBatY, _bottomBatX + _batLength, 
                                  _bottomBatY + _batHeight), paint); //bottom bat
}

public boolean surfaceTouched(float posX, float posY, boolean flag) {

    if (flag= true)
    {
        _bottomBatX = (int) posX;
    }
    else
    {
        _topBatX = (int) posX;
    }
    return true;
}