StickyHeaderRecyclerViewRecyclerView 悬浮吸顶 Header
RecyclerView 悬浮吸顶 Header，支持点击事件与状态绑定。
依赖
compile 'com.yuyang:stickyheaders:1.0.0'
用法
Header Model
Header Model 需要实现 StickyHeaderModel 接口
public class HeaderItem implements StickyHeaderModel {
public final String title;
/**
* 状态保存示例，如果header存在一些交互性行为，在onBindViewHolder里面需要绑定悬浮header的状态
*/
public int color = 0xff777777;
public HeaderItem(String title) {
this.title = title;
}
}
public class Item {
public final String title;
public final String message;
public Item(String title, String message) {
this.title = title;
this.message = message;
}
}
Adapter
RecyclerView Adapter 需要实现 StickyHeaderProvider 接口，并在 getAdapterData() 返回 model 数据，用于判断对应 position 是否为 Header
public final class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.BaseViewHolder> implements StickyHeaderProvider {
private final List<Object> dataList = new ArrayList<>();
@Override
public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == 0) {
return new ItemViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view, parent, false));
} else {
return new HeaderViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.header_view, parent, false));
}
}
@Override
public void onBindViewHolder(final BaseViewHolder holder, final int position) {
}
@Override
public int getItemCount() {
return dataList.size();
}
@Override
public int getItemViewType(int position) {
return dataList.get(position) instanceof Item ? 0 : 1;
}
@Override
public List<?> getAdapterData() {
return dataList;
}
private static final class ItemViewHolder extends BaseViewHolder {
TextView titleTextView;
TextView messageTextView;
ItemViewHolder(View itemView) {
super(itemView);
titleTextView = itemView.findViewById(R.id.tv_title);
messageTextView = itemView.findViewById(R.id.tv_message);
}
}
private static final class HeaderViewHolder extends BaseViewHolder {
TextView titleTextView;
TextView button;
HeaderViewHolder(View itemView) {
super(itemView);
titleTextView = itemView.findViewById(R.id.tv_title);
button = itemView.findViewById(R.id.button);
}
}
static class BaseViewHolder extends RecyclerView.ViewHolder {
BaseViewHolder(View itemView) {
super(itemView);
}
}
}
RecyclerView
RecyclerView recyclerView = findViewById(R.id.recycler_view);
RecyclerAdapter adapter = new RecyclerAdapter();
adapter.setDataList(genDataList(0));
// StickyLinearLayoutManager 替代 LinearLayoutManager
StickyLinearLayoutManager layoutManager = new StickyLinearLayoutManager(this, adapter);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(adapter);
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