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我想設置一個標題staggardGridLayoutManeger我有這個網址的代碼https://github.com/willblaschko/header-footer-recycler-view。此代碼包含所有類型的佈局的頁眉和頁腳。誰能幫助設置適配器僅staggardGridLayout這是代碼形式的樣品在我想設置一個標題staggardGridLayoutManeger
enter code here
public class RecyclerViewHeaderFooterAdapter extends RecyclerView.Adapter {
public static final int TYPE_MANAGER_OTHER = 0;
public static final int TYPE_MANAGER_LINEAR = 1;
public static final int TYPE_MANAGER_GRID = 2;
public static final int TYPE_MANAGER_STAGGERED_GRID = 3;
public static final int TYPE_HEADER = 7898;
public static final int TYPE_FOOTER = 7899;
private List<View> mHeaders = new ArrayList<>();
private List<View> mFooters = new ArrayList<>();
private int mManagerType;
private RecyclerView.LayoutManager mManager;
private IRecyclerViewIntermediary mIntermediary;
public RecyclerViewHeaderFooterAdapter(RecyclerView.LayoutManager manager, IRecyclerViewIntermediary intermediary){
setManager(manager);
this.mIntermediary = intermediary;
}
public void setLayoutManager(RecyclerView.LayoutManager manager){
setManager(manager);
}
private void setManager(RecyclerView.LayoutManager manager){
mManager = manager;
if(mManager instanceof GridLayoutManager){
mManagerType = TYPE_MANAGER_GRID;
((GridLayoutManager) mManager).setSpanSizeLookup(mSpanSizeLookup);
}else if(mManager instanceof LinearLayoutManager){
mManagerType = TYPE_MANAGER_LINEAR;
}else if(mManager instanceof StaggeredGridLayoutManager){
mManagerType = TYPE_MANAGER_STAGGERED_GRID;
((StaggeredGridLayoutManager) mManager).setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS);
}else{
mManagerType = TYPE_MANAGER_OTHER;
}
}
public int getManagerType(){
return mManagerType;
}
public int getGridSpan(int position){
if(isHeader(position) || isFooter(position)){
return getSpan();
}
position -= mHeaders.size();
if(mIntermediary.getItem(position) instanceof IGridItem){
return ((IGridItem) mIntermediary.getItem(position)).getGridSpan();
}
return 1;
}
private int getSpan(){
if(mManager instanceof GridLayoutManager){
return ((GridLayoutManager) mManager).getSpanCount();
}else if(mManager instanceof StaggeredGridLayoutManager){
return ((StaggeredGridLayoutManager) mManager).getSpanCount();
}
return 1;
}
private GridLayoutManager.SpanSizeLookup mSpanSizeLookup = new GridLayoutManager.SpanSizeLookup(){
@Override
public int getSpanSize(int position) {
return getGridSpan(position);
}
};
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int type) {
//if our position is one of our items (this comes from getItemViewType(int position) below)
if(type != TYPE_HEADER && type != TYPE_FOOTER) {
return mIntermediary.getViewHolder(viewGroup, type);
//else we have a header/footer
}else{
//create a new framelayout, or inflate from a resource
FrameLayout frameLayout = new FrameLayout(viewGroup.getContext());
//make sure it fills the space
frameLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
return new HeaderFooterViewHolder(frameLayout);
}
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder vh, int position) {
//check what type of view our position is
if(isHeader(position)){
View v = mHeaders.get(position);
//add our view to a header view and display it
prepareHeaderFooter((HeaderFooterViewHolder) vh, v);
}else if(isFooter(position)){
View v = mFooters.get(position-mIntermediary.getItemCount()-mHeaders.size());
//add our view to a footer view and display it
prepareHeaderFooter((HeaderFooterViewHolder) vh, v);
}else {
//it's one of our items, display as required
mIntermediary.populateViewHolder(vh, position-mHeaders.size());
}
}
private void prepareHeaderFooter(HeaderFooterViewHolder vh, View view){
//if it's a staggered grid, span the whole layout
if(mManagerType == TYPE_MANAGER_STAGGERED_GRID){
StaggeredGridLayoutManager.LayoutParams layoutParams = new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
layoutParams.setFullSpan(true);
vh.itemView.setLayoutParams(layoutParams);
}
//if the view already belongs to another layout, remove it
if(view.getParent() != null){
((ViewGroup)view.getParent()).removeView(view);
}
//empty out our FrameLayout and replace with our header/footer
vh.base.removeAllViews();
vh.base.addView(view);
}
private boolean isHeader(int position){
return(position < mHeaders.size());
}
private boolean isFooter(int position){
return(position >= mHeaders.size() + mIntermediary.getItemCount());
}
@Override
public int getItemCount() {
return mHeaders.size() + mIntermediary.getItemCount() + mFooters.size();
}
@Override
public int getItemViewType(int position) {
//check what type our position is, based on the assumption that the order is headers > items > footers
if(isHeader(position)){
return TYPE_HEADER;
}else if(isFooter(position)){
return TYPE_FOOTER;
}
int type = mIntermediary.getItemViewType(position);
if(type == TYPE_HEADER || type == TYPE_FOOTER){
throw new IllegalArgumentException("Item type cannot equal "+TYPE_HEADER+" or "+TYPE_FOOTER);
}
return type;
}
//add a header to the adapter
public void addHeader(View header){
if(!mHeaders.contains(header)){
mHeaders.add(header);
//animate
notifyItemInserted(mHeaders.size()-1);
}
}
//remove a header from the adapter
public void removeHeader(View header){
if(mHeaders.contains(header)){
//animate
notifyItemRemoved(mHeaders.indexOf(header));
mHeaders.remove(header);
}
}
//add a footer to the adapter
public void addFooter(View footer){
if(!mFooters.contains(footer)){
mFooters.add(footer);
//animate
notifyItemInserted(mHeaders.size()+mIntermediary.getItemCount()+mFooters.size()-1);
}
}
//remove a footer from the adapter
public void removeFooter(View footer){
if(mFooters.contains(footer)) {
//animate
notifyItemRemoved(mHeaders.size()+mIntermediary.getItemCount()+mFooters.indexOf(footer));
mFooters.remove(footer);
}
}
//our header/footer RecyclerView.ViewHolder is just a FrameLayout
public static class HeaderFooterViewHolder extends RecyclerView.ViewHolder{
FrameLayout base;
public HeaderFooterViewHolder(View itemView) {
super(itemView);
base = (FrameLayout) itemView;
}
}
}