package com.github.jdsjlzx.recyclerview;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import com.github.jdsjlzx.interfaces.OnItemClickListener;
import com.github.jdsjlzx.interfaces.OnItemLongClickListener;
import java.util.ArrayList;
import java.util.List;
/**
* RecyclerView.Adapter with Header and Footer
*
*/
public class LuRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_NORMAL = 0;
private static final int TYPE_FOOTER_VIEW = 10001;
private static final int HEADER_INIT_INDEX = 10002;
private static List<Integer> mHeaderTypes = new ArrayList<>();
private OnItemClickListener mOnItemClickListener;
private OnItemLongClickListener mOnItemLongClickListener;
/**
* RecyclerView使用的，真正的Adapter
*/
private RecyclerView.Adapter mInnerAdapter;
private ArrayList<View> mHeaderViews = new ArrayList<>();
private ArrayList<View> mFooterViews = new ArrayList<>();
private SpanSizeLookup mSpanSizeLookup;
public LuRecyclerViewAdapter(RecyclerView.Adapter innerAdapter) {
this.mInnerAdapter = innerAdapter;
}
public RecyclerView.Adapter getInnerAdapter() {
return mInnerAdapter;
}
public void addHeaderView(View view) {
if (view == null) {
throw new RuntimeException("header is null");
}
mHeaderTypes.add(HEADER_INIT_INDEX + mHeaderViews.size());
mHeaderViews.add(view);
}
public void addFooterView(View view) {
if (view == null) {
throw new RuntimeException("footer is null");
}
if (getFooterViewsCount() > 0) {
removeFooterView();
}
mFooterViews.add(view);
}
/**
* 根据header的ViewType判断是哪个header
* @param itemType
* @return
*/
private View getHeaderViewByType(int itemType) {
if(!isHeaderType(itemType)) {
return null;
}
return mHeaderViews.get(itemType - HEADER_INIT_INDEX);
}
/**
* 判断一个type是否为HeaderType
* @param itemViewType
* @return
*/
private boolean isHeaderType(int itemViewType) {
return mHeaderViews.size() > 0 && mHeaderTypes.contains(itemViewType);
}
/**
* 返回第一个FootView
* @return
*/
public View getFooterView() {
return getFooterViewsCount()>0 ? mFooterViews.get(0) : null;
}
/**
* 返回第一个HeaderView
* @return
*/
public View getHeaderView() {
return getHeaderViewsCount()>0 ? mHeaderViews.get(0) : null;
}
public ArrayList<View> getHeaderViews() {
return mHeaderViews;
}
public void removeHeaderView(View view) {
mHeaderViews.remove(view);
this.notifyDataSetChanged();
}
public void removeFooterView() {
if (getFooterViewsCount() > 0) {
View footerView = getFooterView();
mFooterViews.remove(footerView);
this.notifyDataSetChanged();
}
}
public int getHeaderViewsCount() {
return mHeaderViews.size();
}
public int getFooterViewsCount() {
return mFooterViews.size();
}
public boolean isHeader(int position) {
return position >= 0 && position < mHeaderViews.size() ;
}
public boolean isFooter(int position) {
int lastPosition = getItemCount() - 1;
return getFooterViewsCount() > 0 && position >= lastPosition;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (isHeaderType(viewType)) {
return new ViewHolder(getHeaderViewByType(viewType));
} else if (viewType == TYPE_FOOTER_VIEW) {
return new ViewHolder(mFooterViews.get(0));
}
return mInnerAdapter.onCreateViewHolder(parent, viewType);
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
if (isHeader(position)) {
return;
}
final int adjPosition = position - getHeaderViewsCount();
int adapterCount;
if (mInnerAdapter != null) {
adapterCount = mInnerAdapter.getItemCount();
if (adjPosition < adapterCount) {
mInnerAdapter.onBindViewHolder(holder, adjPosition);
if (mOnItemClickListener != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
mOnItemClickListener.onItemClick(holder.itemView, adjPosition);
}
});
}
if (mOnItemLongClickListener != null) {
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v)
{
mOnItemLongClickListener.onItemLongClick(holder.itemView, adjPosition);
return true;
}
});
}
}
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position, List<Object> payloads) {
if (payloads.isEmpty()) {
onBindViewHolder(holder,position);
} else {
if (isHeader(position)) {
return;
}
final int adjPosition = position - getHeaderViewsCount();
int adapterCount;
if (mInnerAdapter != null) {
adapterCount = mInnerAdapter.getItemCount();
if (adjPosition < adapterCount) {
mInnerAdapter.onBindViewHolder(holder, adjPosition, payloads);
}
}
}
}
@Override
public int getItemCount() {
if (mInnerAdapter != null) {
return getHeaderViewsCount() + getFooterViewsCount() + mInnerAdapter.getItemCount();
} else {
return getHeaderViewsCount() + getFooterViewsCount();
}
}
@Override
public int getItemViewType(int position) {
int adjPosition = position - getHeaderViewsCount();
if (isHeader(position)) {
return mHeaderTypes.get(position);
}
if (isFooter(position)) {
return TYPE_FOOTER_VIEW;
}
int adapterCount;
if (mInnerAdapter != null) {
adapterCount = mInnerAdapter.getItemCount();
if (adjPosition < adapterCount) {
return mInnerAdapter.getItemViewType(adjPosition);
}
}
return TYPE_NORMAL;
}
@Override
public long getItemId(int position) {
if (mInnerAdapter != null && position >= getHeaderViewsCount()) {
int adjPosition = position - getHeaderViewsCount();
int adapterCount = mInnerAdapter.getItemCount();
if (adjPosition < adapterCount) {
return mInnerAdapter.getItemId(adjPosition);
}
}
return -1;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
Log.e("lzx","onAttachedToRecyclerView ");
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager instanceof GridLayoutManager) {
final GridLayoutManager gridManager = ((GridLayoutManager) manager);
gridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
Log.e("lzx","position = " + position);
Log.e("lzx","isHeader(position) = " + isHeader(position));
if (mSpanSizeLookup == null) {
return (isHeader(position) || isFooter(position))
? gridManager.getSpanCount() : 1;
} else {
return (isHeader(position) || isFooter(position))
? gridManager.getSpanCount() : mSpanSizeLookup.getSpanSize(gridManager, (position - (getHeaderViewsCount() + 1)));
}
}
});
}
mInnerAdapter.onAttachedToRecyclerView(recyclerView);
}
@Override
public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
mInnerAdapter.onDetachedFromRecyclerView(recyclerView);
}
@Override
public void onViewAttachedToWindow(RecyclerView.ViewHolder holder) {
super.onViewAttachedToWindow(holder);
ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();
if (lp != null && lp instanceof StaggeredGridLayoutManager.LayoutParams) {
if(isHeader(holder.getLayoutPosition()) || isFooter(holder.getLayoutPosition())) {
StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;
p.setFullSpan(true);
}
}
mInnerAdapter.onViewAttachedToWindow(holder);
}
@Override
public void onViewDetachedFromWindow(RecyclerView.ViewHolder holder) {
mInnerAdapter.onViewDetachedFromWindow(holder);
}
@Override
public void onViewRecycled(RecyclerView.ViewHolder holder) {
mInnerAdapter.onViewRecycled(holder);
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View itemView) {
super(itemView);
}
}
/**
*
* @param isCallback whether position is from callback interface
* @param position
* @return
*/
public int getAdapterPosition(boolean isCallback, int position) {
if(isCallback) {
int adjPosition = position - getHeaderViewsCount();
int adapterCount = mInnerAdapter.getItemCount();
if (adjPosition < adapterCount) {
return adjPosition;
}
}else {
return (position + getHeaderViewsCount());
}
return -1;
}
public void setOnItemClickListener(OnItemClickListener mOnItemClickListener)
{
this.mOnItemClickListener = mOnItemClickListener;
}
public void setOnItemLongClickListener(OnItemLongClickListener itemLongClickListener)
{
this.mOnItemLongClickListener = itemLongClickListener;
}
public interface SpanSizeLookup {
int getSpanSize(GridLayoutManager gridLayoutManager, int position);
}
/**
* @param spanSizeLookup
* only used to GridLayoutManager
*/
public void setSpanSizeLookup(SpanSizeLookup spanSizeLookup) {
this.mSpanSizeLookup = spanSizeLookup;
}
}