我写了一个HorizontalScrollView，是动态的添加子项，该怎么让其自动显示刚添加的子项，

Question

好像刷新UI的话  要借助Handler

Answer 1

使用 postInvalidate方法，重绘UI.

Answer 2

private void scrollToEnd() {
        new Handler().post(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(10);
                    int left = linearLayout.getMeasuredWidth() - horizontalScrollView.getWidth();
                    if(left < 0) {
                        left = 0;
                    }
                    horizontalScrollView.scrollTo(left, 0);
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
此乃正解，不过仍感谢各位！！

Answer 3

private void scrollToEnd() {
        new Handler().post(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(10);
                    int left = linearLayout.getMeasuredWidth() - horizontalScrollView.getWidth();
                    if(left < 0) {
                        left = 0;
                    }
                    horizontalScrollView.scrollTo(left, 0);
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
此乃正解，仍然感谢各位！！！