//重写ScrollViewpublic class NotifyingScrollView extends ScrollView {/*** @author Cyril Mottier*/public interface OnScrollChangedListener {void onScrollChanged(ScrollView who, int l, int t, int oldl, int oldt);}private OnScrollChangedListener mOnScrollChangedListener;public NotifyingScrollView(Context context) {super(context);}public NotifyingScrollView(Context context, AttributeSet attrs) {super(context, attrs);}public NotifyingScrollView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@Overrideprotected void onScrollChanged(int l, int t, int oldl, int oldt) {super.onScrollChanged(l, t, oldl, oldt);if (mOnScrollChangedListener != null) {mOnScrollChangedListener.onScrollChanged(this, l, t, oldl, oldt);}}public void setOnScrollChangedListener(OnScrollChangedListener listener) {mOnScrollChangedListener = listener;}}

 <你的项目路径.NotifyingScrollViewandroid:id="@id/sv_personal"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@color/layout_bg"android:scrollbars="none" ><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:background="@color/layout_bg"android:orientation="vertical" >
你要显示的内容
</LinearLayout></你的项目路径.NotifyingScrollView>

NotifyingScrollView sv_personal=(NotifyingScrollView)findViewById(R.id.sv_personal);
sv_personal.setOnScrollChangedListener(mOnScrollChangedListener);private NotifyingScrollView.OnScrollChangedListener mOnScrollChangedListener = new NotifyingScrollView.OnScrollChangedListener() {
public void onScrollChanged(ScrollView who, int l, int t, int oldl, int oldt) {
int Height=Utility.dip2px(context, 130);
float ratio =Math.max(Math.min(1, t/Height), 0);
//导航控件
linar_top.setAlpha(ratio* 255);
}
};