gistfile1.txt

    private float mPreviousX;
    private float mPreviousY;
    private int mPreviousPointer;
    
    private float mOriginalX;
    private float mOriginalY;

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        // MotionEvent reports input details from the touch screen
        // and other input controls. In this case, we are only
        // interested in events where the touch position changed.
    	
    	detector.onTouchEvent(e);

    	int pId = e.getPointerId(0);
    	
        float x = e.getX();
        float y = e.getY();

        float dx = x - mPreviousX;
        float dy = y - mPreviousY;
        
        switch (e.getAction()) {
        
            case MotionEvent.ACTION_MOVE:

            	if (mPreviousPointer == pId) {
                	mRenderer.setTranslate(dx, dy);
                } else {
                	mPreviousPointer = pId;
                }
                requestRender();
                break;
                
            case MotionEvent.ACTION_DOWN:
            	mOriginalX = x;
            	mOriginalY = y;
            	break;
                
            case MotionEvent.ACTION_UP:
            	
            	if (Math.abs(mOriginalX-x)<5 && Math.abs(mOriginalY-y)<5){
	            	MyGLSurfaceView.touchedX = x;
	            	MyGLSurfaceView.touchedY = y;
	            	MyGLSurfaceView.ASK_FOR_KEY = true;
	            	requestRender();
            	}
            	break;
        }

        mPreviousX = x;
        mPreviousY = y;
        //invalidate();
        return true;
    }