Actually it show when user touch the screen but I want to show it automatically for a few seconds so user can kNow this view is scroll-able.
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scrollbarDefaultDelayBeforeFade="2000"
android:scrollbaralwaysDrawVerticalTrack="true">
解决方法:
在ScrollView的xml中添加android:id属性,并在活动中使用Timer或countdowntimer进行2秒钟通知,并在完成时设置ScrollView的可见性
看不见.