要实现RecyclerView下拉加载功能，可以使用SwipeRefreshLayout结合RecyclerView来实现

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2024-03-08 14:11:43

要实现RecyclerView下拉加载功能，可以使用SwipeRefreshLayout结合RecyclerView来实现。具体步骤如下：

在布局文件中添加SwipeRefreshLayout和RecyclerView：

<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeRefreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">

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

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

在Activity或Fragment中初始化SwipeRefreshLayout和RecyclerView，并设置下拉刷新监听器和滑动监听器：

SwipeRefreshLayoutswipeRefreshLayout=findViewById(R.id.swipeRefreshLayout);
RecyclerViewrecyclerView=findViewById(R.id.recyclerView);

swipeRefreshLayout.setOnRefreshListener(newSwipeRefreshLayout.OnRefreshListener(){
@Override
publicvoidonRefresh(){
//下拉刷新时执行的操作
//可以在这里请求数据并更新RecyclerView
swipeRefreshLayout.setRefreshing(false);//刷新完成后停止刷新动画
}
});

recyclerView.addOnScrollListener(newRecyclerView.OnScrollListener(){
@Override
publicvoidonScrolled(RecyclerViewrecyclerView,intdx,intdy){
super.onScrolled(recyclerView,dx,dy);

LinearLayoutManagerlayoutManager=(LinearLayoutManager)recyclerView.getLayoutManager();
intlastVisibleItemPosition=layoutManager.findLastVisibleItemPosition();
inttotalItemCount=layoutManager.getItemCount();

if(!swipeRefreshLayout.isRefreshing()&&totalItemCount<=(lastVisibleItemPosition+5)){
//滑动到底部时执行的操作
//可以在这里加载更多数据并更新RecyclerView
}
}
});