SwipeView类似桌面的滑动界面(9)

     */ 
    public OnPageChangedListener getOnPageChangedListener() 
    { 
        return mOnPageChangedListener; 
    } 
     
    @Override 
    public boolean onInterceptTouchEvent(MotionEvent ev) 
    { 
        boolean result = super.onInterceptTouchEvent(ev); 
         
        if(ev.getAction() == MotionEvent.ACTION_DOWN) 
        { 
            mMotionStartX = (int) ev.getX(); 
            mMotionStartY = (int) ev.getY(); 
            if(!mJustInterceptedAndIgnored) 
            { 
                mMostlyScrollingInX = false; 
                mMostlyScrollingInY = false; 
            } 
        } 
        else if(ev.getAction()==MotionEvent.ACTION_MOVE) 
        { 
            detectMostlyScrollingDirection(ev); 
        } 
         
        if(mMostlyScrollingInY) 
        { 
            return false; 
        } 
        if(mMostlyScrollingInX) 
        { 
            mJustInterceptedAndIgnored = true; 
            return true; 
        } 
         
        return result; 
    } 
     
    private void detectMostlyScrollingDirection(MotionEvent ev) 
    { 
        if(!mMostlyScrollingInX && !mMostlyScrollingInY) //if we dont know which direction we're going yet