1.使用的是BaseQuickAdapter+RecyclerView+SmartRefreshLayout
//BaseQuickAdapter
api 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.49'
//SmartRefreshLayout
implementation 'com.scwang.smart:refresh-layout-kernel:2.0.3' //核心必须依赖
implementation 'com.scwang.smart:refresh-header-classics:2.0.3' //经典刷新头
implementation 'com.scwang.smart:refresh-header-material:2.0.0-alpha-1' //谷歌刷新头
2.布局
<?xml version="1.0" encoding="utf-8"?>
<com.scwang.smart.refresh.layout.SmartRefreshLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:id="@+id/smartRefreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:id="@+id/recyclerView"
android:overScrollMode="never"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</com.scwang.smart.refresh.layout.SmartRefreshLayout>
3.初始化和处理逻辑
public abstract class BaseListActivity<T,K extends BaseQuickAdapter> extends BaseActivity{
protected K adapter;
protected List<T> list=new ArrayList<>();
protected int pageNum = 1;//页码
protected int pageSize=10;//每页的个数
protected RecyclerView.LayoutManager layoutManager;
protected View emptyView;//空数据布局
protected abstract void loadMore();
protected abstract void refresh();
protected RecyclerView recyclerView;
protected SmartRefreshLayout smartRefreshLayout;
protected View headView;//头部布局
protected void initRecyclerViewsWithEmptyView(){
if(adapter==null){
//请先初始化adapter
//throw new NullPointerException("请先初始化adapter");
return;
}
recyclerView=findViewById(R.id.recyclerView);
smartRefreshLayout=findViewById(R.id.smartRefreshLayout);
//smartRefreshLayout.setHasFixedSize(true);
smartRefreshLayout.setNestedScrollingEnabled(false);
//默认LinearLayoutManager
if(layoutManager==null){
layoutManager=new LinearLayoutManager(mContext);
}
recyclerView.setLayoutManager(layoutManager);
if(headView!=null){
adapter.addHeaderView(headView);
}
if(emptyView==null){
// ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
View defaultEmptyView = LayoutInflater.from(this).inflate(R.layout.common_layout_cart_empty_error, null);
//defaultEmptyView.setLayoutParams(layoutParams);
TextView emptyText = defaultEmptyView.findViewById(R.id.tv_empty_msg);
emptyText.setText(emptyStr);
adapter.bindToRecyclerView(recyclerView);
adapter.setEmptyView(defaultEmptyView);
//adapter.setEmptyView(R.layout.common_layout_cart_empty_error,recyclerView);
}else{
adapter.bindToRecyclerView(recyclerView);
adapter.setEmptyView(emptyView);
}
recyclerView.setAdapter(adapter);
smartRefreshLayout.setRefreshHeader(new ClassicsHeader(mContext));
smartRefreshLayout.setRefreshFooter(new ClassicsFooter(mContext));
smartRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh(RefreshLayout refreshlayout) {
//refreshlayout.finishRefresh(2000/*,false*/);//传入false表示刷新失败
refresh();
}
});
smartRefreshLayout.setOnLoadMoreListener(new OnLoadMoreListener() {
@Override
public void onLoadMore(RefreshLayout refreshlayout) {
//refreshlayout.finishLoadMore(2000/*,false*/);//传入false表示加载失败
//当第一页充满时才加载第二页
if(list.size()>=pageSize){
loadMore();
}else{
smartRefreshLayout.finishLoadMoreWithNoMoreData();
}
}
});
//smartRefreshLayout.setOnRefreshListener(refreshlayout -> refresh());
//smartRefreshLayout.setOnLoadMoreListener(refreshlayout -> loadMore());
//与上面一个二选一，
adapter.setOnLoadMoreListener(() -> {
loadMore();
// adapter.loadMoreFail();
// adapter.loadMoreEnd();
// adapter.loadMoreComplete();
});
}
/**
* 回调失败的处理,针对有上拉加载，下拉刷新的情况
*/
protected void showErrorView(boolean isRefresh){
if(isRefresh){//pageNum == 1
smartRefreshLayout.finishRefresh();
}else{
smartRefreshLayout.finishLoadMoreWithNoMoreData();
}
}
/**
* 成功回调的处理
* @param isRefresh
* @param result
*/
protected void showSuccessView(boolean isRefresh,List<T> result){
//第一种写法
if(isRefresh){
//smartRefreshLayout.resetNoMoreData();
smartRefreshLayout.setNoMoreData(false);
smartRefreshLayout.finishRefresh();
list.clear();
if (null != result && result.size() != 0) {
//smartRefreshLayout.setVisibility(View.VISIBLE);
if (result.size() < pageSize){
smartRefreshLayout.setEnableLoadMore(true);
}else {
smartRefreshLayout.setEnableLoadMore(false);
}
list.addAll(result);
}
adapter.notifyDataSetChanged();
}else{//加载更多
//smartRefreshLayout.setVisibility(View.VISIBLE);
if (null != result && result.size() != 0) {
if (result.size() < pageSize){
smartRefreshLayout.finishLoadMoreWithNoMoreData();
}else {
smartRefreshLayout.finishLoadMore();
}
list.addAll(result);
adapter.notifyDataSetChanged();
}else{
//smartRefreshLayout.finishLoadMoreWithNoMoreData();
smartRefreshLayout.finishLoadMore(100,true,true);
}
}
//第二种写法
if (pageNum == 1){
list.clear();
smartRefreshLayout.finishRefresh();
smartRefreshLayout.setEnableLoadMore(true);
}else{
smartRefreshLayout.finishLoadMore();
}
if(result!=null){
if (result.size() <pageSize) {
smartRefreshLayout.setEnableLoadMore(false);
smartRefreshLayout.finishLoadMoreWithNoMoreData();
}
list.addAll(result);
}else {
if(pageNum>1){
smartRefreshLayout.finishLoadMoreWithNoMoreData();
}
}
adapter.notifyDataSetChanged();
}
}
4.调用示例 kotlin：
//初始化
adapter = FactoryListAdapter(list)
initRecyclerViewsWithEmptyView()
//模拟网络请求
private fun getList(isRefresh: Boolean) {
onSuccess(data){
showSuccessView(isRefresh, data)
}
onError(){
showErrorView(isRefresh)
}
}
override fun loadMore() {
pageNum++
getList(false)
}
override fun refresh() {
pageNum = 1
getList(true)
}
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