1.说明

• 下拉刷新控件SmartRefreshLayout
• 下拉刷新自定义头布局ClassicsHeader
• 空白页控件EmptyLayout
• 自定义EmptyLayoutManager（统一处理空白布局图片、文字）

2.使用方法

布局文件：

<com.scwang.smartrefresh.layout.SmartRefreshLayout
            android:id="@+id/refreshLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="visible"
            app:srlEnablePreviewInEditMode="true">

            <com.chailijun.example.EmptyLayout
                android:id="@+id/empty_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/white">

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/detail_recyclerView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:nestedScrollingEnabled="false"
                    android:scrollbars="none"
                    android:visibility="visible" />

            </com.chailijun.example.EmptyLayout>
</com.scwang.smartrefresh.layout.SmartRefreshLayout>

java 代码：

        mRefreshLayout.setEnableRefresh(true);
        mRefreshLayout.setEnableLoadMore(true);
        //设置上次更新时间的key
        String lastUpdateTimeKey = "lastUpdateTimeKey";//每个页面该字符串不能相同
        mClassicsHeader = new ClassicsHeader(mContext, lastUpdateTimeKey);
        mRefreshLayout.setRefreshHeader(mClassicsHeader);
        mRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh(RefreshLayout refreshLayout) {
                refreshNewData();
            }
        });
        mRefreshLayout.setOnLoadMoreListener(new OnLoadMoreListener() {
            @Override
            public void onLoadMore(RefreshLayout refreshLayout) {
                loadMoreData();
            }
        });

在获取数据后：

//显示没有网络布局
EmptyLayoutManager.getInstance().showEmptyView(mEmptyLayout, EmptyType.NO_NET);

//显示没有数据布局,其他类似布局可以依次扩展
EmptyLayoutManager.getInstance().showEmptyView(mEmptyLayout, EmptyType.NO_DATA);

//显示内容布局
EmptyLayoutManager.getInstance().showContent(mEmptyLayout);

3.其他代码

EmptyType

@IntDef({
        EmptyType.NO_NET,
        EmptyType.NO_DATA,
        EmptyType.NO_NEWS
})
@Retention(RetentionPolicy.SOURCE)
public @interface EmptyType {

    /**
     * 没有网络
     */
    int NO_NET = 0;

    /**
     * 暂无相关数据
     */
    int NO_DATA = 1;

    /**
     * 暂无相关资讯
     */
    int NO_NEWS = 2;

}

EmptyLayoutManager

public class EmptyLayoutManager {

    private static EmptyLayoutManager instance;

    private EmptyLayoutManager(){

    }

    public static EmptyLayoutManager getInstance(){
        if (instance == null){
            synchronized (EmptyLayoutManager.class){
                if (instance == null){
                    instance = new EmptyLayoutManager();
                }
            }
        }
        return instance;
    }

    private String emptyText = null;

    public void setEmptyText(String emptyTips) {
        this.emptyText = emptyTips;
    }

    public void showEmptyView(EmptyLayout emptyLayout, @EmptyType int type) {
        if (emptyLayout == null) {
            throw new NullPointerException("emptyLayout is null");
        }
        switch (type) {
            case EmptyType.NO_NET://没有网络
                emptyLayout.setEmptyText("网络已断开").setEmptyImage(R.drawable.blank_no_net).showEmpty();
                break;

            case EmptyType.NO_DATA:
                String tips = "暂无相关数据";
                if (!TextUtils.isEmpty(emptyText)){
                    tips = emptyText;
                }
                emptyLayout.setEmptyText(tips).setEmptyImage(R.drawable.blank_wuxiangguan).showEmpty();
                break;

            case EmptyType.NO_NEWS:
                emptyLayout.setEmptyText("暂无相关资讯").setEmptyImage(R.drawable.blank_wuxiangguan).showEmpty();
                break;

            default:
                break;
        }
    }

   public void showContent(EmptyLayout emptyLayout){
        if (emptyLayout == null) {
            throw new NullPointerException("emptyLayout is null");
        }
        emptyLayout.showContent();
    }
}

ClassicsHeader
自定义下拉刷新头部局代码略，可参考这里

public class ClassicsHeader extends LinearLayout implements RefreshHeader {
}