HorizontalScrollView判断是否移动到底部

 

HorizontalScrollView hs = (HorizontalScrollView)findViewById(R.id.horscro); 
        //水平滑动栏箭头的出现与消失 
        hs.setOnTouchListener(new OnTouchListener() {    
            @Override
            public boolean onTouch(View v, MotionEvent event) { 
                // TODO Auto-generated method stub 
                switch (event.getAction()){ 
                //如果触动屏幕就执行 
                    case MotionEvent.ACTION_MOVE: 
                        View view = ((HorizontalScrollView) v).getChildAt(0); 
                        //判断是否滑动栏到底了，如果是，就让iv这个图片隐藏，否则显示 
                        if (view.getMeasuredWidth() <= v.getScrollX() + v.getWidth()+2) { 
                            ImageView iv = (ImageView)findViewById(R.id.angel); 
                            iv.setVisibility(View.INVISIBLE); 
                        } else { 
                            ImageView iv = (ImageView)findViewById(R.id.angel); 
                            iv.setVisibility(View.VISIBLE); 
                        } 
                        break; 
                    default: 
                        break; 
                            
                } 
                return false;   
                    
            } 
        });