場(chǎng)景1

一種是SwipeRefreshLayout+RecyclerView在同一個(gè)界面的，
可以通過(guò)重寫(xiě)swipe盒使、或者重寫(xiě)recycler控件捣作，來(lái)解決衣摩。
這也是比較容易的

• 方案1：在監(jiān)聽(tīng)方法里判斷卜录，當(dāng)RecyclerView可見(jiàn)的item位于第一個(gè)的時(shí)候戈擒，使swipeRefresh獲取焦點(diǎn)

recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener(){  
        @Override  
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {  
            int topRowVerticalPosition =  
                    (recyclerView == null || recyclerView.getChildCount() == 0) ? 0 : recyclerView.getChildAt(0).getTop();  
            swipeRefreshLayout.setEnabled(topRowVerticalPosition >= 0);  
  
        }  
  
        @Override  
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {  
            super.onScrollStateChanged(recyclerView, newState);  
        }  
    }); 

• 方案2: 重寫(xiě)RecyclerView，

public class FixedRecyclerView extends RecyclerView {
    public FixedRecyclerView(Context context) {
        super(context);
    }

    public FixedRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FixedRecyclerView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean canScrollVertically(int direction) {
        // check if scrolling up
        if (direction < 1) {
            boolean original = super.canScrollVertically(direction);
            return !original && getChildAt(0) != null && getChildAt(0).getTop() < 0 || original;
        }
        return super.canScrollVertically(direction);

    }
}

• 方案3: 重寫(xiě)swipeRefreshlayout

ublic class SwipeRefreshLayout extends android.support.v4.widget.SwipeRefreshLayout
  {
  public SwipeRefreshLayout(Context context)
    {
    super(context);
    }

  public SwipeRefreshLayout(Context context,AttributeSet attrs)
    {
    super(context,attrs);
    }

  @Override
  public boolean canChildScrollUp()
    {
    View target=getChildAt(0);
    if(target instanceof AbsListView)
      {
      final AbsListView absListView=(AbsListView)target;
      return absListView.getChildCount()>0
              &&(absListView.getFirstVisiblePosition()>0||absListView.getChildAt(0)
              .getTop()<absListView.getPaddingTop());
      }
    else
      return ViewCompat.canScrollVertically(target,-1);
    }
  }

場(chǎng)景2

還有一種是存在ViewPager的頁(yè)面艰毒，
比如像這種筐高，不單存在ViewPage，而且外層還加了一個(gè)滾動(dòng)視圖ScrollView丑瞧。
需求是柑土，當(dāng)item處于頂端，再刷新嗦篱。
也就是需要從Activity里監(jiān)聽(tīng)Fragment中item的狀態(tài)冰单。

• 方案：
  Activity中定義方法來(lái)獲取Fragment滾動(dòng)距離

    /*通過(guò)Fragmenbt的滾動(dòng)距離回調(diào)
    * 注意：這里只能處理當(dāng)ScrollLayout完全隱藏后幌缝，F(xiàn)ragment的ScrollView才能開(kāi)始滾動(dòng)事件灸促，
    * 上滑的時(shí)候卻優(yōu)先執(zhí)行ScrollLayout的方法
     */
    public void getonScroll(int i) {
        srl.setEnabled(i<450)
    }

Fragment中回調(diào)
如果RecyclerView外層還有ScrollView，還要處理滑動(dòng)沖突
方法是給RecyclerView設(shè)置android:nestedScrollingEnabled="false"屬性涵卵，將滾動(dòng)事件交給父滾動(dòng)控件浴栽，并且在監(jiān)聽(tīng)的時(shí)候監(jiān)聽(tīng)scrollView的滾動(dòng)事件

        scrollView.setOnScrollChangeListener(new View.OnScrollChangeListener() {
            @Override
            public void onScrollChange(View view, int i, int i1, int i2, int i3) {
                Log.e("i======", "i:" + i + ",i1:" + i1 + ",i2:" + i2 + ",i3:" + i3);
                if (i1>300) {
                    activity.getonScroll(i1);
                }
            }
        });

或者監(jiān)聽(tīng)RecyclerView

        //這里獲取不到recycler的監(jiān)聽(tīng)事件，因?yàn)镾crollView沖突問(wèn)題轿偎，在布局將滾動(dòng)焦點(diǎn)交給了ScrollView處理
        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                activity.getonScroll(dy);
            }
        });

想看詳細(xì)源碼可以參考：https://github.com/wapchief/imitationLOL
是一個(gè)仿掌上英雄聯(lián)盟的練手項(xiàng)目典鸡，歡迎star。