上拉加载下拉刷新的控件大家该很熟悉了，今天介绍一款不错的上拉加载下拉刷新控件--------SmartRefreshLayout

其他人简书网址:https://www.jianshu.com/p/05ce4ab4b948

一.导入依赖

在app-module中添加RecycleView和SmartRefreshLayout的依赖

    //recyclerview
    implementation 'com.android.support:recyclerview-v7:26.1.0'
    implementation 'com.android.support:design:26.1.0'
    //SmartRefreshLayout
    implementation 'com.scwang.smartrefresh:SmartRefreshLayout:1.0.4-7'
    implementation 'com.scwang.smartrefresh:SmartRefreshHeader:1.0.4-7'

二.在mainActivity中添加xml布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.freshdemo.MainActivity"
    android:orientation="vertical">


    <com.scwang.smartrefresh.layout.SmartRefreshLayout
        android:id="@+id/refreshLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:srlAccentColor="#00000000"
        app:srlPrimaryColor="#00000000"
        app:srlEnablePreviewInEditMode="true">

            <android.support.v7.widget.RecyclerView
                android:id="@+id/rv"
                android:layout_width="match_parent"
                android:layout_height="match_parent"/>

    </com.scwang.smartrefresh.layout.SmartRefreshLayout>

</LinearLayout>

这是SmartRefreshLayout的基本布局，其中：

 app:srlAccentColor="#00000000"//设置Header主题颜色
 app:srlPrimaryColor="#00000000"//设置Footer主题颜色
 app:srlEnablePreviewInEditMode="true"//开启和关闭预览功能

三.MainActivity中初始化和刷新加载事件

  private RecyclerView mRecyclerView;
    private RefreshLayout mRefreshLayout;

    //初始化
    mRecyclerView=findViewById(R.id.rv);
    mRefreshLayout = findViewById(R.id.refreshLayout);

           //刷新
        mRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh(RefreshLayout refreshlayout) {
                mData.clear();
                mNameAdapter.notifyDataSetChanged();
                refreshlayout.finishRefresh();
            }
        });
        //加载更多
        mRefreshLayout.setOnLoadmoreListener(new OnLoadmoreListener() {
            @Override
            public void onLoadmore(RefreshLayout refreshlayout) {
                for(int i=0;i<30;i++){
                    mData.add("小明"+i);
                }
                mNameAdapter.notifyDataSetChanged();
                refreshlayout.finishLoadmore();
            }
        });

开启/关闭下拉刷新和加载更多，结束刷新和加载

开始下拉
mRefreshLayout.setEnableRefresh(true);//启用刷新
mRefreshLayout.setEnableLoadmore(true);//启用加载
关闭下拉
mRefreshLayout.finishRefresh();
mRefreshLayout.finishLoadmore();