/**
* 设置FooterView
*
* @param recyclerView
* @param view
*/
public static void setFooterView(RecyclerView recyclerView, View view) {
RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();
if (outerAdapter == null || !(outerAdapter instanceof HeaderAndFooterRecyclerViewAdapter)) {
return;
}
HeaderAndFooterRecyclerViewAdapter headerAndFooterAdapter =
(HeaderAndFooterRecyclerViewAdapter) outerAdapter;
if (headerAndFooterAdapter.getFooterViewsCount() == 0) {
headerAndFooterAdapter.addFooterView(view);
}
}
/**
* 移除HeaderView
*
* @param recyclerView
*/
public static void removeHeaderView(RecyclerView recyclerView) {
RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();
if (outerAdapter != null && outerAdapter instanceof HeaderAndFooterRecyclerViewAdapter) {
int headerViewCounter =
((HeaderAndFooterRecyclerViewAdapter) outerAdapter).getHeaderViewsCount();
if (headerViewCounter > 0) {
View headerView = ((HeaderAndFooterRecyclerViewAdapter) outerAdapter).getHeaderView();
((HeaderAndFooterRecyclerViewAdapter) outerAdapter).removeFooterView(headerView);
}
}
}
/**
* 设置headerAndFooterAdapter的FooterView State
*
* @param recyclerView recyclerView
* @param pageSize 分页展示时，recyclerView每一页的数量
* @param state FooterView State
* @param errorListener FooterView处于Error状态时的点击事件
*/
public static void setFooterViewState(
Context context,
RecyclerView recyclerView,
int pageSize,
LoadingFooter.State state,
View.OnClickListener errorListener) {
if (context == null) {
return;
}
RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();
if (outerAdapter == null || !(outerAdapter instanceof HeaderAndFooterRecyclerViewAdapter)) {
return;
}
HeaderAndFooterRecyclerViewAdapter headerAndFooterAdapter =
(HeaderAndFooterRecyclerViewAdapter) outerAdapter;
// 只有一页的时候，就别加什么FooterView了
if (headerAndFooterAdapter.getInnerAdapter().getItemCount() < pageSize) {
return;
}
LoadingFooter footerView;
// 已经有footerView了
if (headerAndFooterAdapter.getFooterViewsCount() > 0) {
footerView = (LoadingFooter) headerAndFooterAdapter.getFooterView();
footerView.setState(state);
if (state == LoadingFooter.State.NetWorkError) {
footerView.setOnClickListener(errorListener);
}
recyclerView.scrollToPosition(headerAndFooterAdapter.getItemCount() - 1);
} else {
footerView = new LoadingFooter(context);
footerView.setState(state);
if (state == LoadingFooter.State.NetWorkError) {
footerView.setOnClickListener(errorListener);
}
headerAndFooterAdapter.addFooterView(footerView);
recyclerView.scrollToPosition(headerAndFooterAdapter.getItemCount() - 1);
}
}