十月项目小结（Recycler下拉刷新，上拉分页加载）

Recycler上拉分页加载、下拉刷新

该需求采用RecyclerView、SwipeRefreshLayout以及第三方插件BRVAH结合使用方式完成，SwipeRefreshLayout完成下拉刷新、BRVAH完成上拉分页加载

1. build.gradle 配置说明

allprojects {
repositories {
…
maven { url ‘https://jitpack.io’ }
}
}

添加依赖:compile ‘com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30’

2. Adapter 继承BaseQuickAdapter，重写父类的RecordRvAdapter、convert方法详细地址

> public class PaymentRecordRvAdapter extends BaseQuickAdapter<PaymentRecordListBean.DataBean,BaseViewHolder> {

	private Context mContext;
	/**
		* @param layoutResId      The layout resource id of each item.  //内容的布局
     	* @param data             A new list is created out of this one to avoid mutable list  //数据源
     */
    public PaymentRecordRvAdapter(int layoutResId, List<DataBean> data，Context mContext) {
        super(layoutItemResId,dataBeans);
        this.mContext = mContext;
    }
    
    @Override
    protected void convert(BaseViewHolder helper, DataBean itemData) {
    	//获取相应控件实例、设置相应属性
      ImageView imageView = helper.getView(R.id.iv_icon);
        Glide.with(mContext).load(item.getIcon()).apply(new RequestOptions().centerCrop()).into(imageView);
        helper.setText(R.id.tv_charge_type,item.getExpenseName())
                .setText(R.id.tv_time,DateUtils.formatDate(item.getBillTime(),DateUtils.DB_DATA_FORMAT))；
    }
}

3. layout.xml

 	//RecyclerView结合SwipeRefreshLayout实现下拉刷新功能
	 <android.support.v4.widget.SwipeRefreshLayout
           	 android:id="@+id/srl_refresh"
           	 android:layout_width="match_parent"
          	  android:layout_height="wrap_content">

            	<android.support.v7.widget.RecyclerView
               	 android:layout_marginTop="@dimen/y15"
               	 android:id="@+id/rv_payment_record"
               	 android:layout_width="match_parent"
               	 android:layout_height="wrap_content"/>

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

4. .Activity

/**Description:初始化SwipeRefreshLayout的下拉刷新监听，整个生命周期有效*/
    protected void initSwipeRefreshLayoutListener(){
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                ......
                adapterDataBeans.clear();//清空数据
                quickAdapter.replaceData(adapterDataBeans);//调用QuickAdapter的replaceData通知数据清空
                quickAdapter.setEnableLoadMore(true);//重新启动下拉分页加载响应
                requestRecyclerDate();//启动刷新后初次数据加载
            }
        });
    }

//初始化QuickAdapter监听
@Override 
    public void initBrvahListener() {
     	//item点击事件监听
        quickAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
           //do something
            }
        });

	//上拉请求数据监听
        quickAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override
            public void onLoadMoreRequested() {
	            //上拉请求开始前，需要停止swipeRefreshLayout的下拉刷新响应
                swipeRefreshLayout.setEnabled(false);
                requestRecyclerDate();
                //上拉刷新结束后，需要开启swipeRefreshLayout的下拉刷新响应
                swipeRefreshLayout.setEnabled(true);
            }
        }, recyclerView);
        
		//设置该方法，初次加载数据不足时，系统即会停止响应下次上拉加载数据请求
        quickAdapter.disableLoadMoreIfNotFullPage();
    }

/**Description:添加分页数据*/
    protected void addAdapterData(List<T> data){
        if (data.size() != 0) {
            pageNum++;
            adapterDataBeans.addAll(data);
            if (data.size() != PAGE_SIZE)
            /**Description:完成本次请求，关闭上拉请求监听响应*/
                quickAdapter.loadMoreEnd();
            else
            /**Description:完成本次请求*/
                quickAdapter.loadMoreComplete();
        } else {
        	/**Description:完成本次请求，关闭上拉请求监听响应*/
            quickAdapter.loadMoreEnd();
        }
    }