自己封装的工具类，使用原生SwipeRefreshLayout+RecycleView实现下拉刷新和加载更多
实现SwipeRefreshLayout+RecycleView实现刷新
在你的xml文件里写上如下代码：
<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:cacheColorHint="#00000000"
android:overScrollMode="never"
android:scrollbars="none"/>
</android.support.v4.widget.SwipeRefreshLayout>在你的Activity或Fragment实现RecyclerViewLoadMoreUtil.RefreshDataListener刷新接口并调用以下代码初始化：
这里的init()方法中的
参数一：content
参数二：SwipeRefreshLayout控件
参数三：RecyclerView控件
参数四：继承RecyclerView.Adapter的adapter，这里可以使用我另外写的一篇关于adapter的封装
参数五：刷新接口，这里如果在Activity或Fragment实现RecyclerViewLoadMoreUtil.RefreshDataListener就可以在此处填this了
recyclerViewLoadMoreUtil = new RecyclerViewLoadMoreUtil();
recyclerViewLoadMoreUtil.init(mContext, mSwipeRefreshLayout, mRecyclerView, mAdapter, this);
recyclerViewLoadMoreUtil.setColorSchemeResources(R.color.yellow_press, R.color.green, R.color.red);
recyclerViewLoadMoreUtil.autoRefreshing();//第一次自动加载一次
....
@Override
public void onRefresh() {
recyclerViewLoadMoreUtil.endRefreshing();
//Do the things you want to do
}
@Override
public boolean loadMore() {
recyclerViewLoadMoreUtil.endLoading();
//Do the things you want to do
return true;
}下面介绍该工具类中的几个方法
- autoRefreshing(); // 自动加载上拉刷新
- endRefreshing();// 关闭SwipeRefreshLayout的小圆圈
- endLoading();// 关闭加载更多
- setPullDownRefreshEnable(boolean isRefresh);// 设置列表是否禁止下拉刷新，是否显示下拉刷新动画只能通过该方法设置
- setPullUpRefreshEnable(boolean isLoadMore);// 设置列表是否禁止上拉刷新
以下是该刷新工具类的全部代码
/**
* Created by xiongxuesong-pc on 2016/6/17.
* 配合原生RecyclerVew和SwipeRefreshLayout加载更多
*/
public class RecyclerViewLoadMoreUtil {
protected Context mContext;
protected SwipeRefreshLayout mSwipeRefreshLayout;
protected RecyclerView mRecyclerView;
protected RecyclerView.Adapter mAdapter;
protected RefreshDataListener mRefreshDataListener;
private boolean mIsRefresh = true;//是否禁止下拉刷新，默认是不禁止下拉刷新
private boolean mIsLoadMore = true;//是否禁止上拉刷新，默认是不禁止上拉刷新
private boolean isSlidingToScreenBottom = false;//用来标记是否正在向最后一个滑动，既是否向右滑动或向下滑动
public RecyclerViewLoadMoreUtil() {
}
public void init(final Context context, final SwipeRefreshLayout swipeRefreshLayout, RecyclerView recyclerView, final RecyclerView.Adapter adapter, final RefreshDataListener refreshDataListener) {
initConfig(context, swipeRefreshLayout, recyclerView, adapter, refreshDataListener);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
boolean isRefreshing = swipeRefreshLayout.isRefreshing();
if (isRefreshing) {
refreshDataListener.onRefresh();
}
}
});
final LinearLayoutManager layoutManager = new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager();
// 当不滚动时
boolean idleFlag = newState == RecyclerView.SCROLL_STATE_IDLE;
if (idleFlag) {
//获取最后一个完全显示的ItemPosition
int lastVisibleItem = manager.findLastCompletelyVisibleItemPosition();
int totalItemCount = mAdapter.getItemCount();
// 判断是否滚动到屏幕底部，并且是向右滚动
if (lastVisibleItem == (totalItemCount - 1) && isSlidingToScreenBottom) {
if (mScrolledBottomListener != null) {
mScrolledBottomListener.ScrolledBottom(recyclerView);
}
if (mIsLoadMore) {//可以加载更多
mSwipeRefreshLayout.setEnabled(false);//禁止使用下拉刷新
mRefreshDataListener.loadMore();
Log.d("TAG", "howes right=" + manager.findLastCompletelyVisibleItemPosition());
// Toast.makeText(mContext, "加载更多", Toast.LENGTH_SHORT).show();
} else {
// Toast.makeText(mContext, "不能加载更多", Toast.LENGTH_SHORT).show();
}
}
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
Log.d("TAG", "dy=" + dy);
//dx用来判断横向滑动方向，dy用来判断纵向滑动方向
//当列表项的总高度小于屏幕，即不会滚动列表时，dx、dy都等于0
if (dy > 0) {
//大于0表示，正在向右滚动，向上滚动
isSlidingToScreenBottom = true;
} else {
//小于等于0 表示停止或向左滚动，向下滚动
isSlidingToScreenBottom = false;
}
if (mScrollingListener != null) {
mScrollingListener.scroll(isSlidingToScreenBottom);
}
}
});
}
private void initConfig(Context context, SwipeRefreshLayout swipeRefreshLayout, RecyclerView recyclerView, RecyclerView.Adapter adapter, RefreshDataListener refreshDataListener) {
this.mContext = context;
this.mSwipeRefreshLayout = swipeRefreshLayout;
this.mRecyclerView = recyclerView;
this.mAdapter = adapter;
this.mRefreshDataListener = refreshDataListener;
}
/**
* 首次进入页面可以自动加载，要使用必须在{@link #init(Context, SwipeRefreshLayout, RecyclerView, RecyclerView.Adapter, RefreshDataListener)}
* 之后调用
*/
public void autoRefreshing() {
mSwipeRefreshLayout.post(new Runnable() {
@Override
public void run() {
mSwipeRefreshLayout.setRefreshing(true);
mRefreshDataListener.onRefresh();
}
});
}
/**
* 要使用必须在{@link #init(Context, SwipeRefreshLayout, RecyclerView, RecyclerView.Adapter, RefreshDataListener)}
* 之后调用
*
* @param colorResIds
*/
public void setColorSchemeResources(@ColorRes int... colorResIds) {
mSwipeRefreshLayout.setColorSchemeResources(colorResIds);
}
public void endRefreshing() {
mSwipeRefreshLayout.setRefreshing(false);
}
public void endLoading() {
if (mIsRefresh) {//如果之前已经设置过禁止下拉刷新，此时不应该在设置成可下拉刷新
setPullDownRefreshEnable(true);//可以使用下拉刷新
} else {//如果之前已经设置过禁止下拉刷新，此时不应该在设置成可下拉刷新
setPullDownRefreshEnable(false);//不可以使用下拉刷新
}
}
/**
* 设置列表是否禁止下拉刷新，是否显示下拉刷新动画只能通过该方法设置
*
* @param isRefresh true 可以使用下拉刷新；false 不可以使用下拉刷新
*/
public void setPullDownRefreshEnable(boolean isRefresh) {
mIsRefresh = isRefresh;
mSwipeRefreshLayout.setEnabled(isRefresh);
}
/**
* 设置列表是否禁止上拉刷新
*
* @param isLoadMore true 可以使用上拉刷新；false 不可以使用上拉刷新
*/
public void setPullUpRefreshEnable(boolean isLoadMore) {
mIsLoadMore = isLoadMore;
}
public interface RefreshDataListener {
void onRefresh();
boolean loadMore();
}
private ScrollingListener mScrollingListener;
public interface ScrollingListener {
/**
* true 向上滚动；false 向下滚动
*
* @param scrollState
*/
void scroll(boolean scrollState);
}
public void setScrollingListener(ScrollingListener listener) {
mScrollingListener = listener;
}
private ScrolledBottomListener mScrolledBottomListener;
public interface ScrolledBottomListener {
/**
* 列表滚动到屏幕底部时调用
*
* @param recyclerView
*/
void ScrolledBottom(RecyclerView recyclerView);
}
public void setScrollingListener(ScrolledBottomListener listener) {
mScrolledBottomListener = listener;
}
}这是本人从项目中抽取出来的，暂时没在项目中出现问题，希望能帮助到你。
转载请注明出处，谢谢！
