java.lang.IllegalStateException: ScrollView can host only one direct child
原因是在外面有一個TextView控件，將其刪除則OK。
主要是ScrollView內部只能有一個子元素，即不能並列兩個子元素，所以需要把所有的子
元素放到一個LinearLayout內部或RelativeLayout等其他布局方式。
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