SwipeRefreshLayout下拉刷新

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<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_refresh_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.v7.widget.RecyclerView>
</android.support.v4.widget.SwipeRefreshLayout>

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        swipeRefreshLayout = ((SwipeRefreshLayout) inflater.inflate(R.layout.fragment_swipe_refresh_recycler, null));
        swipeRefreshLayout.setColorSchemeResources(
                android.R.color.holo_blue_bright,
                android.R.color.holo_green_light,
                android.R.color.holo_orange_light,
                android.R.color.holo_red_light
        );
        layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
        recyclerView = (RecyclerView) swipeRefreshLayout.findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(layoutManager);
        adapter = initAdapter(getActivity(), list);
        recyclerView.setAdapter(adapter);
        recyclerView.addOnScrollListener(
                new RecyclerView.OnScrollListener() {
                    @Override
                    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                        super.onScrolled(recyclerView, dx, dy);
                    }
                    /**
                     * 向下滚动的过程,自动加载
                     */
                    @Override
                    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                        super.onScrollStateChanged(recyclerView, newState);
                        int itemCount = adapter.getItemCount();
                        layoutManager.findFirstCompletelyVisibleItemPosition();
                        swipeRefreshLayout.setEnabled(layoutManager.findFirstCompletelyVisibleItemPosition() == 0);

                     if (itemCount > PAGE_SIZE && layoutManager.findLastVisibleItemPosition() > itemCount - 5) {
                             request(currentPage + 1);
                        }

}
}
);
swipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
reset();
}
}
);
return swipeRefreshLayout;
}

/**
 * 切换fragment时,如果正在刷新会干扰事件的传递
 */
public void stopRefreshing() {
    if (swipeRefreshLayout != null && swipeRefreshLayout.isRefreshing()) {
        swipeRefreshLayout.setRefreshing(false);
    }

}

    public void reset() {
        stopRefreshing();
        request(FIRST_PAGE);
    }

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_refresh_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.v7.widget.RecyclerView>
</android.support.v4.widget.SwipeRefreshLayout>

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        swipeRefreshLayout = ((SwipeRefreshLayout) inflater.inflate(R.layout.fragment_swipe_refresh_recycler, null));
        swipeRefreshLayout.setColorSchemeResources(
                android.R.color.holo_blue_bright,
                android.R.color.holo_green_light,
                android.R.color.holo_orange_light,
                android.R.color.holo_red_light
        );
        layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
        recyclerView = (RecyclerView) swipeRefreshLayout.findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(layoutManager);
        adapter = initAdapter(getActivity(), list);
        recyclerView.setAdapter(adapter);
        recyclerView.addOnScrollListener(
                new RecyclerView.OnScrollListener() {
                    @Override
                    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                        super.onScrolled(recyclerView, dx, dy);
                    }
                    /**
                     * 向下滚动的过程,自动加载
                     */
                    @Override
                    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                        super.onScrollStateChanged(recyclerView, newState);
                        int itemCount = adapter.getItemCount();
                        layoutManager.findFirstCompletelyVisibleItemPosition();
                        swipeRefreshLayout.setEnabled(layoutManager.findFirstCompletelyVisibleItemPosition() == 0);

                     if (itemCount > PAGE_SIZE && layoutManager.findLastVisibleItemPosition() > itemCount - 5) {
                             request(currentPage + 1);
                        }

}
}
);
swipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
reset();
}
}
);
return swipeRefreshLayout;
}

/**
 * 切换fragment时,如果正在刷新会干扰事件的传递
 */
public void stopRefreshing() {
    if (swipeRefreshLayout != null && swipeRefreshLayout.isRefreshing()) {
        swipeRefreshLayout.setRefreshing(false);
    }

}

    public void reset() {
        stopRefreshing();
        request(FIRST_PAGE);
    }