如何判断ScrollView到底部

纵向 ScrollView
 横向 HorizontalScrollView

判断ScrollView到底部

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        text = (TextView)findViewById(R.id.text);
//        text.setText(getResources().getString(R.string.hello_world));
        text.setText(R.string.hello_world);

        scrollView = (ScrollView)findViewById(R.id.scroll);

        scrollView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()){
                    case MotionEvent.ACTION_MOVE:
                        //滑动到底部
                        if(scrollView.getChildAt(0).getMeasuredHeight() <= scrollView.getHeight() + scrollView.getScrollY()){
                            text.append("aaaaaaaaaaaaaaaaaaaa");
                        }
                        break;
                }
                return false;
            }
        });
    }

其他  设置scrollView x y 轴  scrollTo  
 递增递减 x y 轴  scrollBy