app/src/main/java/me/zhanghai/android/douya/util/RecyclerViewUtils.java
(完整代码) 830B/*
* Copyright (c) 2015 Zhang Hai <Dreaming.in.Code.ZH@Gmail.com>
* All Rights Reserved.
*/
package me.zhanghai.android.douya.util;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
public class RecyclerViewUtils {
private RecyclerViewUtils() {}
public static Context getContext(RecyclerView.ViewHolder holder) {
return holder.itemView.getContext();
}
public static boolean hasFirstChildReachedTop(RecyclerView recyclerView) {
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
View firstChild = layoutManager.findViewByPosition(0);
if (firstChild != null) {
return firstChild.getTop() <= 0;
} else {
return layoutManager.getChildCount() > 0;
}
}
}
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