//重寫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;}} View Code

布局引用重寫NotifyingScrollView控件

<你的項目路徑.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" > 你要顯示的內容 </LinearLayout></你的項目路徑.NotifyingScrollView> View Code

activity使用引用

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); //導航控件 linar_top.setAlpha(ratio* 255); } }; View Code

?int Height=Utility.dip2px(context, 130); 130為要滑動的高度

總結

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