Java Android 5.0-向RecyclerView添加页眉/页脚
我花了一点时间试图找到一种向Java Android 5.0-向RecyclerView添加页眉/页脚,java,android,android-recyclerview,android-5.0-lollipop,Java,Android,Android Recyclerview,Android 5.0 Lollipop,我花了一点时间试图找到一种向RecyclerView添加标题的方法，但没有成功 到目前为止，我得到的是： @Override protected void onCreate(Bundle savedInstanceState) { ... layouManager = new LinearLayoutManager(getActivity()); recyclerView.setLayoutManager(layouManager); LayoutInflat
RecyclerView@Override
protected void onCreate(Bundle savedInstanceState) {
...
layouManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layouManager);
LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
headerPlaceHolder = inflater.inflate(R.layout.view_header_holder_medium, null, false);
layouManager.addView(headerPlaceHolder, 0);
...
}
LayoutManagerRecyclerViewaddHeaderView（View-View）LayoutManageraddView（View-View，int-position）java.lang.NullPointerException: Attempt to read from field 'android.support.v7.widget.RecyclerView$ViewHolder android.support.v7.widget.RecyclerView$LayoutParams.mViewHolder' on a null object reference
at android.support.v7.widget.RecyclerView.getChildViewHolderInt(RecyclerView.java:2497)
at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:4807)
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:4803)
at com.mathieumaree.showz.fragments.CategoryFragment.setRecyclerView(CategoryFragment.java:231)
at com.mathieumaree.showz.fragments.CategoryFragment.access$200(CategoryFragment.java:47)
at com.mathieumaree.showz.fragments.CategoryFragment$2.success(CategoryFragment.java:201)
at com.mathieumaree.showz.fragments.CategoryFragment$2.success(CategoryFragment.java:196)
at retrofit.CallbackRunnable$1.run(CallbackRunnable.java:41)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
NullPointerExceptionsPS：另外，除了
LinearLayoutManagerGridLayoutManageri==0getItemViewTypecreateViewHoldergetItemViewType别忘了从传递给
bindViewHolderRecyclerviewnotifyDataSetChanged- 用法
newheaderRecycleServiceAdapterV1（new RegularAdapter（）） - 用法
RegularAdapter扩展HeaderRecyclServiceAdapterV2
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;
/**
* Created by sebnapi on 08.11.14.
* <p/>
* This is a Plug-and-Play Approach for adding a Header or Footer to
* a RecyclerView backed list
* <p/>
* Just wrap your regular adapter like this
* <p/>
* new HeaderRecyclerViewAdapterV1(new RegularAdapter())
* <p/>
* Let RegularAdapter implement HeaderRecyclerView, FooterRecyclerView or both
* and you are ready to go.
* <p/>
* I'm absolutely not sure how this will behave with changes in the dataset.
* You can always wrap a fresh adapter and make sure to not change the old one or
* use my other approach.
* <p/>
* With the other approach you need to let your Adapter extend HeaderRecyclerViewAdapterV2
* (and therefore change potentially more code) but possible omit these shortcomings.
* <p/>
* TOTALLY UNTESTED - USE WITH CARE - HAVE FUN :)
*/
public class HeaderRecyclerViewAdapterV1 extends RecyclerView.Adapter {
private static final int TYPE_HEADER = Integer.MIN_VALUE;
private static final int TYPE_FOOTER = Integer.MIN_VALUE + 1;
private static final int TYPE_ADAPTEE_OFFSET = 2;
private final RecyclerView.Adapter mAdaptee;
public HeaderRecyclerViewAdapterV1(RecyclerView.Adapter adaptee) {
mAdaptee = adaptee;
}
public RecyclerView.Adapter getAdaptee() {
return mAdaptee;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_HEADER && mAdaptee instanceof HeaderRecyclerView) {
return ((HeaderRecyclerView) mAdaptee).onCreateHeaderViewHolder(parent, viewType);
} else if (viewType == TYPE_FOOTER && mAdaptee instanceof FooterRecyclerView) {
return ((FooterRecyclerView) mAdaptee).onCreateFooterViewHolder(parent, viewType);
}
return mAdaptee.onCreateViewHolder(parent, viewType - TYPE_ADAPTEE_OFFSET);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (position == 0 && holder.getItemViewType() == TYPE_HEADER && useHeader()) {
((HeaderRecyclerView) mAdaptee).onBindHeaderView(holder, position);
} else if (position == mAdaptee.getItemCount() && holder.getItemViewType() == TYPE_FOOTER && useFooter()) {
((FooterRecyclerView) mAdaptee).onBindFooterView(holder, position);
} else {
mAdaptee.onBindViewHolder(holder, position - (useHeader() ? 1 : 0));
}
}
@Override
public int getItemCount() {
int itemCount = mAdaptee.getItemCount();
if (useHeader()) {
itemCount += 1;
}
if (useFooter()) {
itemCount += 1;
}
return itemCount;
}
private boolean useHeader() {
if (mAdaptee instanceof HeaderRecyclerView) {
return true;
}
return false;
}
private boolean useFooter() {
if (mAdaptee instanceof FooterRecyclerView) {
return true;
}
return false;
}
@Override
public int getItemViewType(int position) {
if (position == 0 && useHeader()) {
return TYPE_HEADER;
}
if (position == mAdaptee.getItemCount() && useFooter()) {
return TYPE_FOOTER;
}
if (mAdaptee.getItemCount() >= Integer.MAX_VALUE - TYPE_ADAPTEE_OFFSET) {
new IllegalStateException("HeaderRecyclerViewAdapter offsets your BasicItemType by " + TYPE_ADAPTEE_OFFSET + ".");
}
return mAdaptee.getItemViewType(position) + TYPE_ADAPTEE_OFFSET;
}
public static interface HeaderRecyclerView {
public RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup parent, int viewType);
public void onBindHeaderView(RecyclerView.ViewHolder holder, int position);
}
public static interface FooterRecyclerView {
public RecyclerView.ViewHolder onCreateFooterViewHolder(ViewGroup parent, int viewType);
public void onBindFooterView(RecyclerView.ViewHolder holder, int position);
}
}
导入android.support.v7.widget.RecyclerView；
导入android.view.ViewGroup；
/**
*由sebnapi于2014年11月8日创建。
*
*这是一种即插即用的方法，用于将页眉或页脚添加到
*一个RecyclerView支持的列表
*
*就像这样包装你的普通适配器
*
*新的HeaderRecyclServiceAdapterV1（新的RegularAdapter（））
*
*让RegularAdapter实现HeaderRecyclView、FooterRecyclView或两者
*你准备好出发了。
*
*我绝对不确定在数据集中发生变化时这将如何表现。
*您可以始终包装一个新的适配器，并确保不更改旧的或旧的适配器
*用我的另一种方法。
*
*使用另一种方法，您需要让适配器扩展HeaderRecyclServiceAdapterV2
*（因此可能会更改更多代码），但可能会忽略这些缺点。
*
*完全未经测试-小心使用-享受乐趣：）
*/
公共类HeaderRecycleServiceAdapterV1扩展了RecycleView.Adapter{
私有静态final int TYPE_头=Integer.MIN_值；
私有静态final int TYPE_FOOTER=Integer.MIN_值+1；
专用静态最终整数类型\适配器\偏移量=2；
专用最终回收器查看适配器mAdaptee；
public headerRecyclServiceAdapterV1（RecyclerView.Adapter适配器）{
mAdaptee=被改编者；
}
public RecyclerView.Adapter getAdaptee（）{
返回马达普提；
}
@凌驾
public RecyclerView.ViewHolder onCreateViewHolder（视图组父级，int-viewType）{
if（viewType==TYPE_HEADER&&mAdaptee HeaderRecyclerView实例）{
return（（HeaderRecyclerView）mAdaptee）；
}else if（viewType==TYPE\u FOOTER&&mAdaptee instanceof FooterRecyclerView）{
return（（FooterRecyclerView）mAdaptee.onCreateFooterViewHolder（父级，viewType）；
}
返回mAdaptee.onCreateViewHolder（父视图、viewType-TYPE_ADAPTEE_OFFSET）；
}
@凌驾
BindViewHolder上的公共无效（RecyclerView.ViewHolder，int位置）{
if（position==0&&holder.getItemViewType（）==TYPE\u HEADER&&useHeader（））{
（（HeaderRecyclerView）mAdaptee）。onBindHeaderView（支架，位置）；
}else if（position==mAdaptee.getItemCount（）&&holder.getItemViewType（）==TYPE\u FOOTER&&useFooter（））{
（（FooterRecyclerView）mAdaptee）.onBindFooterView（支架，位置）；
}否则{
onBindViewHolder（holder，位置-（useHeader（）？1:0））；
}
}
@凌驾
public int getItemCount（）{
int itemCount=mAdaptee.getItemCount（）；
if（useHeader（））{
itemCount+=1；
}
if（useFooter（））{
itemCount+=1；
}
返回项目计数；
}
私有布尔useHeader（）{
if（HeaderRecyclerView的mAdaptee实例）{
返回true；
}
返回false；
}
私有布尔useFooter（）{
if（页脚回收视图的mAdaptee实例）{
返回true；
}
返回false；
}
@凌驾
public int getItemViewType（int位置）{
if（position==0&&useHeader（））{
返回类型_头；
}
if（position==mAdaptee.getItemCount（）&&useFooter（））{
返回类型\页脚；
}
if（mAdaptee.getItemCount（）>=Integer.MAX\u值-类型\u适配器\u偏移量）{
新的IllegalStateException（“HeaderRecyclServiceAdapter”通过“+TYPE\U ADAPTEE”来抵消您的基本类型_
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;
/**
* Created by sebnapi on 08.11.14.
* <p/>
* If you extend this Adapter you are able to add a Header, a Footer or both
* by a similar ViewHolder pattern as in RecyclerView.
* <p/>
* If you want to omit changes to your class hierarchy you can try the Plug-and-Play
* approach HeaderRecyclerViewAdapterV1.
* <p/>
* Don't override (Be careful while overriding)
* - onCreateViewHolder
* - onBindViewHolder
* - getItemCount
* - getItemViewType
* <p/>
* You need to override the abstract methods introduced by this class. This class
* is not using generics as RecyclerView.Adapter make yourself sure to cast right.
* <p/>
* TOTALLY UNTESTED - USE WITH CARE - HAVE FUN :)
*/
public abstract class HeaderRecyclerViewAdapterV2 extends RecyclerView.Adapter {
private static final int TYPE_HEADER = Integer.MIN_VALUE;
private static final int TYPE_FOOTER = Integer.MIN_VALUE + 1;
private static final int TYPE_ADAPTEE_OFFSET = 2;
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_HEADER) {
return onCreateHeaderViewHolder(parent, viewType);
} else if (viewType == TYPE_FOOTER) {
return onCreateFooterViewHolder(parent, viewType);
}
return onCreateBasicItemViewHolder(parent, viewType - TYPE_ADAPTEE_OFFSET);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (position == 0 && holder.getItemViewType() == TYPE_HEADER) {
onBindHeaderView(holder, position);
} else if (position == getBasicItemCount() && holder.getItemViewType() == TYPE_FOOTER) {
onBindFooterView(holder, position);
} else {
onBindBasicItemView(holder, position - (useHeader() ? 1 : 0));
}
}
@Override
public int getItemCount() {
int itemCount = getBasicItemCount();
if (useHeader()) {
itemCount += 1;
}
if (useFooter()) {
itemCount += 1;
}
return itemCount;
}
@Override
public int getItemViewType(int position) {
if (position == 0 && useHeader()) {
return TYPE_HEADER;
}
if (position == getBasicItemCount() && useFooter()) {
return TYPE_FOOTER;
}
if (getBasicItemType(position) >= Integer.MAX_VALUE - TYPE_ADAPTEE_OFFSET) {
new IllegalStateException("HeaderRecyclerViewAdapter offsets your BasicItemType by " + TYPE_ADAPTEE_OFFSET + ".");
}
return getBasicItemType(position) + TYPE_ADAPTEE_OFFSET;
}
public abstract boolean useHeader();
public abstract RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup parent, int viewType);
public abstract void onBindHeaderView(RecyclerView.ViewHolder holder, int position);
public abstract boolean useFooter();
public abstract RecyclerView.ViewHolder onCreateFooterViewHolder(ViewGroup parent, int viewType);
public abstract void onBindFooterView(RecyclerView.ViewHolder holder, int position);
public abstract RecyclerView.ViewHolder onCreateBasicItemViewHolder(ViewGroup parent, int viewType);
public abstract void onBindBasicItemView(RecyclerView.ViewHolder holder, int position);
public abstract int getBasicItemCount();
/**
* make sure you don't use [Integer.MAX_VALUE-1, Integer.MAX_VALUE] as BasicItemViewType
*
* @param position
* @return
*/
public abstract int getBasicItemType(int position);
}
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
public class RecyclerViewWithFooterAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int FOOTER_VIEW = 1;
private ArrayList<String> data; // Take any list that matches your requirement.
private Context context;
// Define a constructor
public RecyclerViewWithFooterAdapter(Context context, ArrayList<String> data) {
this.context = context;
this.data = data;
}
// Define a ViewHolder for Footer view
public class FooterViewHolder extends ViewHolder {
public FooterViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Do whatever you want on clicking the item
}
});
}
}
// Now define the ViewHolder for Normal list item
public class NormalViewHolder extends ViewHolder {
public NormalViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Do whatever you want on clicking the normal items
}
});
}
}
// And now in onCreateViewHolder you have to pass the correct view
// while populating the list item.
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v;
if (viewType == FOOTER_VIEW) {
v = LayoutInflater.from(context).inflate(R.layout.list_item_footer, parent, false);
FooterViewHolder vh = new FooterViewHolder(v);
return vh;
}
v = LayoutInflater.from(context).inflate(R.layout.list_item_normal, parent, false);
NormalViewHolder vh = new NormalViewHolder(v);
return vh;
}
// Now bind the ViewHolder in onBindViewHolder
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
try {
if (holder instanceof NormalViewHolder) {
NormalViewHolder vh = (NormalViewHolder) holder;
vh.bindView(position);
} else if (holder instanceof FooterViewHolder) {
FooterViewHolder vh = (FooterViewHolder) holder;
}
} catch (Exception e) {
e.printStackTrace();
}
}
// Now the critical part. You have return the exact item count of your list
// I've only one footer. So I returned data.size() + 1
// If you've multiple headers and footers, you've to return total count
// like, headers.size() + data.size() + footers.size()
@Override
public int getItemCount() {
if (data == null) {
return 0;
}
if (data.size() == 0) {
//Return 1 here to show nothing
return 1;
}
// Add extra view to show the footer view
return data.size() + 1;
}
// Now define getItemViewType of your own.
@Override
public int getItemViewType(int position) {
if (position == data.size()) {
// This is where we'll add footer.
return FOOTER_VIEW;
}
return super.getItemViewType(position);
}
// So you're done with adding a footer and its action on onClick.
// Now set the default ViewHolder for NormalViewHolder
public class ViewHolder extends RecyclerView.ViewHolder {
// Define elements of a row here
public ViewHolder(View itemView) {
super(itemView);
// Find view by ID and initialize here
}
public void bindView(int position) {
// bindView() method to implement actions
}
}
}
@Override
public int getItemViewType(int position) {
if (mMode == RecyclerViewMode.MODE_LOADING) {
return RecyclerViewMode.MODE_LOADING;
}
if (mMode == RecyclerViewMode.MODE_ERROR) {
return RecyclerViewMode.MODE_ERROR;
}
if (mMode == RecyclerViewMode.MODE_EMPTY) {
return RecyclerViewMode.MODE_EMPTY;
}
//check what type our position is, based on the assumption that the order is headers > items > footers
if (position < mHeaders.size()) {
return RecyclerViewMode.MODE_HEADER_VIEW;
} else if (position >= mHeaders.size() + mData.size()) {
return RecyclerViewMode.MODE_FOOTER_VIEW;
}
return RecyclerViewMode.MODE_DATA;
}
@Override
public int getItemCount() {
if (mMode == RecyclerViewMode.MODE_DATA) {
return mData.size() + mHeaders.size() + mFooters.size();
} else {
return 1;
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == RecyclerViewMode.MODE_LOADING) {
RecyclerView.ViewHolder loadingViewHolder = onCreateLoadingViewHolder(parent);
loadingViewHolder.itemView.setLayoutParams(
new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, parent.getHeight() - mToolBarHeight)
);
return loadingViewHolder;
}
if (viewType == RecyclerViewMode.MODE_ERROR) {
RecyclerView.ViewHolder errorViewHolder = onCreateErrorViewHolder(parent);
errorViewHolder.itemView.setLayoutParams(
new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, parent.getHeight() - mToolBarHeight)
);
errorViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (null != mOnErrorViewClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnErrorViewClickListener.onErrorViewClick(v);
}
}, 200);
}
}
});
return errorViewHolder;
}
if (viewType == RecyclerViewMode.MODE_EMPTY) {
RecyclerView.ViewHolder emptyViewHolder = onCreateEmptyViewHolder(parent);
emptyViewHolder.itemView.setLayoutParams(
new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, parent.getHeight() - mToolBarHeight)
);
emptyViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (null != mOnEmptyViewClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnEmptyViewClickListener.onEmptyViewClick(v);
}
}, 200);
}
}
});
return emptyViewHolder;
}
if (viewType == RecyclerViewMode.MODE_HEADER_VIEW) {
RecyclerView.ViewHolder headerViewHolder = onCreateHeaderViewHolder(parent);
headerViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (null != mOnHeaderViewClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnHeaderViewClickListener.onHeaderViewClick(v, v.getTag());
}
}, 200);
}
}
});
return headerViewHolder;
}
if (viewType == RecyclerViewMode.MODE_FOOTER_VIEW) {
RecyclerView.ViewHolder footerViewHolder = onCreateFooterViewHolder(parent);
footerViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (null != mOnFooterViewClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnFooterViewClickListener.onFooterViewClick(v, v.getTag());
}
}, 200);
}
}
});
return footerViewHolder;
}
RecyclerView.ViewHolder dataViewHolder = onCreateDataViewHolder(parent);
dataViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (null != mOnItemClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnItemClickListener.onItemClick(v, v.getTag());
}
}, 200);
}
}
});
dataViewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(final View v) {
if (null != mOnItemLongClickListener) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mOnItemLongClickListener.onItemLongClick(v, v.getTag());
}
}, 200);
return true;
}
return false;
}
});
return dataViewHolder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (mMode == RecyclerViewMode.MODE_LOADING) {
onBindLoadingViewHolder(holder, position);
} else if (mMode == RecyclerViewMode.MODE_ERROR) {
onBindErrorViewHolder(holder, position);
} else if (mMode == RecyclerViewMode.MODE_EMPTY) {
onBindEmptyViewHolder(holder, position);
} else {
if (position < mHeaders.size()) {
if (mHeaders.size() > 0) {
onBindHeaderViewHolder(holder, position);
}
} else if (position >= mHeaders.size() + mData.size()) {
if (mFooters.size() > 0) {
onBindFooterViewHolder(holder, position - mHeaders.size() - mData.size());
}
} else {
onBindDataViewHolder(holder, position - mHeaders.size());
}
}
}
compile 'com.mikhaellopez:hfrecyclerview:1.0.0'
int offsetPx = 10;
recyclerView.addItemDecoration(new StartOffsetItemDecoration(offsetPx));
recyclerView.addItemDecoration(new EndOffsetItemDecoration(offsetPx));
class MySection extends StatelessSection {
String title;
List<String> list;
public MySection(String title, List<String> list) {
// call constructor with layout resources for this Section header, footer and items
super(R.layout.section_header, R.layout.section_item);
this.title = title;
this.list = list;
}
@Override
public int getContentItemsTotal() {
return list.size(); // number of items of this section
}
@Override
public RecyclerView.ViewHolder getItemViewHolder(View view) {
// return a custom instance of ViewHolder for the items of this section
return new MyItemViewHolder(view);
}
@Override
public void onBindItemViewHolder(RecyclerView.ViewHolder holder, int position) {
MyItemViewHolder itemHolder = (MyItemViewHolder) holder;
// bind your view here
itemHolder.tvItem.setText(list.get(position));
}
@Override
public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
return new SimpleHeaderViewHolder(view);
}
@Override
public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
MyHeaderViewHolder headerHolder = (MyHeaderViewHolder) holder;
// bind your header view here
headerHolder.tvItem.setText(title);
}
}
// Create an instance of SectionedRecyclerViewAdapter
SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();
// Create your sections with the list of data
MySection section1 = new MySection("My Section 1 title", dataList1);
MySection section2 = new MySection("My Section 2 title", dataList2);
// Add your Sections to the adapter
sectionAdapter.addSection(section1);
sectionAdapter.addSection(section2);
// Set up a GridLayoutManager to change the SpanSize of the header
GridLayoutManager glm = new GridLayoutManager(getContext(), 2);
glm.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
switch(sectionAdapter.getSectionItemViewType(position)) {
case SectionedRecyclerViewAdapter.VIEW_TYPE_HEADER:
return 2;
default:
return 1;
}
}
});
// Set up your RecyclerView with the SectionedRecyclerViewAdapter
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(glm);
recyclerView.setAdapter(sectionAdapter);
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<View
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.v7.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layoutManager="LinearLayoutManager"/>
<View
android:id="@+id/footer"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
RecyclerView v = (RecyclerView) findViewById(...);
v.setNestedScrollingEnabled(false);
AdapterGroup adapterGroup = new AdapterGroup();
adapterGroup.addAdapter(SingleAdapter.create(R.layout.header));
adapterGroup.addAdapter(new MyAdapter(...));
recyclerView.setAdapter(adapterGroup);
<LinearLayout
android:id="@+id/footer"
android:layout_width="match_parent"
android:layout_height="80dp"
android:orientation="vertical"
android:visibility="gone">
</LinearLayout>
public void onBindViewHolder(ChannelAdapter.MyViewHolder holder, int position) {
boolean last = position==data.size()-1;
//....
holder.footer.setVisibility(View.GONE);
if (last && showFooter){
holder.footer.setVisibility(View.VISIBLE);
}
}