Android的滚动视图onScrollChanged [英] Android scrollview onScrollChanged

问题描述

我有一个滚动视图在我的文本视图一个固定的内容。当用户滚动到某个位置，我想开始一个活动或触发吐司。

I have a fixed content in my text view inside a scroll view. When the user scrolls to a certain position, I would like to start an activity or trigger a Toast.

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent" android:layout_height="fill_parent"
 android:id="@+id/scroller">
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TextView android:layout_width="fill_parent" android:id="@+id/story"
   android:layout_height="wrap_content" android:text="@string/lorem"
   android:gravity="fill" />
 </LinearLayout>
</ScrollView>

我的问题是在实施保护的方法 onScrollChanged 找出滚动视图的位置。

My problem is in implementing the protected method onScrollChanged to find out the position of the scroll view.

我已经找到<一href="http://stackoverflow.com/questions/3948934/synchronise-scrollview-scroll-positions-android">this答案是有更简单的解决了这个，而不是宣布一个接口，在乘坐滚动型等看到我张贴的链接？

I have found this answer, is there an easier solution to this rather than declaring an interface, over ride the scrollview etc as seen on the link I posted?

推荐答案

没有。

滚动型不提供侦听滚动事件，甚至一个方法来检查多远下来的用户滚动，所以你必须做的是建议的链接。

ScrollView doesn't provide a listener for scroll events or even a way to check how far down the user has scrolled, so you have to do what is suggested by the link.

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