我使用ListView和addFooterView在FrameLayout中插入Fragment，这是可行的！
但是现在我想使用RecyclerView并在FrameLayout的{{1}}的页脚中添加RecyclerView。
但是当列表数据显示时，Fragment没有显示！
我该如何解决，谢谢！
这是我的ListView代码（可以显示FrameLayout）：
FrameLayout这是我的RecyclerView代码：
public class NewFragment extends Fragment {
private ListView mListView;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.new_layout,container,false);
mListView = (ListView) view.findViewById(R.id.listView);
// AD FrameLayout.
FrameLayout footerLayout = (FrameLayout) getLayoutInflater().inflate(R.layout.footerview, null);
// ListView.
ArrayList<Card> list = new ArrayList<>();
list.add(new Card("drawable://" + R.drawable.icon1, "Batman","1 min","drawable://" + R.drawable.img_pic1, "list1 post1.", "10000 likes", "10000 message"));
list.add(new Card("drawable://" + R.drawable.icon2, "Superman","10 min","drawable://" + R.drawable.img_pic2, "list1 post2.", "1234 likes", "123 message"));
list.add(new Card("drawable://" + R.drawable.icon3, "Ironman","30 min","drawable://" + R.drawable.img_pic3, "list1 post3.", "10 likes", "10 message"));
CustomListAdapter adapter = new CustomListAdapter(getActivity(), R.layout.card_layout_main, list);
mListView.addFooterView(footerLayout); // add FrameLayout in the footer of listview.
mListView.setAdapter(adapter);
return view;
}
}
这是我的适应者：
public class HotFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
private RecyclerView postcardRecycler;
private ArrayList<PostCard> post_data = new ArrayList<>();
private ArrayList<PostCard> refresh_data = new ArrayList<>();
private PostCardImageAdapter adapter;
private Handler handler = new Handler();
private SwipeRefreshLayout swipeRefreshLayout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.hot_layout, container, false);
postcardRecycler = view.findViewById(R.id.postcard_recycler);
swipeRefreshLayout = view.findViewById(R.id.postcard_swipe_refresh);
swipeRefreshLayout.setOnRefreshListener(this);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
postcardRecycler.setLayoutManager(layoutManager);
adapter = new PostCardImageAdapter(getActivity(), post_data);
postcardRecycler.setAdapter(adapter);
init();
return postcardRecycler;
}
private void init() {
initPostData();
initRefreshData();
}
private void initPostData() {
post_data.add(new PostCard("http://clipart-library.com/images/8T65akk8c.png", "Batman", "1min", "Original RecyclerView.", "https://pmcvariety.files.wordpress.com/2013/07/dark_knight_rises.jpg", "100 likes", "100 messages"));
post_data.add(new PostCard("https://cdn.iconscout.com/icon/free/png-256/superman-6-282336.png", "Superman", "10min", "Original RecyclerView.", "https://ichef.bbci.co.uk/news/660/cpsprodpb/FA79/production/_102512146_d8e385de-4e0c-45c0-b265-e105d0b47294.jpg", "66likes", "66messages"));
}
private void initRefreshData() {
refresh_data.add(new PostCard("http://clipart-library.com/images/8T65akk8c.png", "Batman", "1min", "Refresh RecyclerView.", "https://pmcvariety.files.wordpress.com/2013/07/dark_knight_rises.jpg", "100 likes", "100 messages"));
refresh_data.add(new PostCard("https://cdn.iconscout.com/icon/free/png-256/superman-6-282336.png", "Superman", "10min", "Refresh RecyclerView.", "https://ichef.bbci.co.uk/news/660/cpsprodpb/FA79/production/_102512146_d8e385de-4e0c-45c0-b265-e105d0b47294.jpg", "66likes", "66messages"));
}
@Override
public void onRefresh() {
handler.postDelayed(new Runnable() {
@Override
public void run() {
Log.e("refresh", "Enter Refresh function!");
post_data.addAll(0, refresh_data);
adapter.notifyDataSetChanged();
swipeRefreshLayout.setRefreshing(false);
}
}, 1000);
}
这是我的footerview.xml：
package playground.com.pgapp;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import java.util.ArrayList;
public class PostCardImageAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final int Post_Layout = 0;
public static final int AD_Layout = 1;
private Context mContext;
private ArrayList<PostCard> mData;
private LayoutInflater mLayoutInflater;
private int mBottomCount = 1;
public PostCardImageAdapter(Context context, ArrayList<PostCard> data) {
this.mContext = context;
this.mData = data;
mLayoutInflater = LayoutInflater.from(context);
}
public int getContentItemCount(){
return mData.size();
}
public boolean isBootomView(int position){
return mBottomCount != 0 && position >= getContentItemCount();
}
@Override
public int getItemViewType(int position) {
int dataItemCount = getContentItemCount();
if(mBottomCount != 0 && position >= dataItemCount){
return AD_Layout;
}
else{
return Post_Layout;
}
}
// post ViewHolder.
public static class ItemViewHolder extends RecyclerView.ViewHolder {
private ImageView postcard_userIcon;
private TextView postcard_name;
private TextView postcard_time;
private TextView postcard_postText;
private ImageView postcard_postPic;
private TextView postcard_likes;
private TextView postcard_comments;
public ItemViewHolder(View itemView) {
super(itemView);
postcard_userIcon = (ImageView) itemView.findViewById(R.id.postcard_userIcon);
postcard_name = (TextView) itemView.findViewById(R.id.postcard_name);
postcard_time = (TextView) itemView.findViewById(R.id.postcard_time);
postcard_postText = (TextView) itemView.findViewById(R.id.postcard_postText);
postcard_postPic = (ImageView) itemView.findViewById(R.id.postcard_postPic);
postcard_likes = (TextView) itemView.findViewById(R.id.postcard_likes);
postcard_comments = (TextView) itemView.findViewById(R.id.postcard_comments);
}
}
// ad ViewHolder.
public static class FooterViewHolder extends RecyclerView.ViewHolder {
public FooterViewHolder(View itemView) {
super(itemView);
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == Post_Layout){
return new ItemViewHolder(mLayoutInflater.inflate(R.layout.postcard_layout, parent, false));
}
else if(viewType == AD_Layout){
return new FooterViewHolder(mLayoutInflater.inflate(R.layout.footerview, parent, false));
}
return null;
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
if(holder instanceof ItemViewHolder){
PostCard post = mData.get(position);
((ItemViewHolder) holder).postcard_name.setText(post.name);
((ItemViewHolder) holder).postcard_time.setText(post.time);
((ItemViewHolder) holder).postcard_postText.setText(post.postText);
((ItemViewHolder) holder).postcard_likes.setText(post.likes);
((ItemViewHolder) holder).postcard_comments.setText(post.comments);
Glide.with(mContext)
.load(post.userIconUrl)
.into(((ItemViewHolder) holder).postcard_userIcon);
Glide.with(mContext)
.load(post.postPicUrl)
.into(((ItemViewHolder) holder).postcard_postPic);
}
else if(holder instanceof FooterViewHolder){
}
}
@Override
public int getItemCount() {
return getContentItemCount() + mBottomCount;
}
}
答案 0 :(得分：1)
您需要创建两个视图持有人类。您已经在PostCardImageAdapter内部创建了其中之一。
然后在PostCardImageAdapter中创建FooterViewHolder
class FooterViewHolder extends RecyclerView.ViewHolder {
FooterViewHolder(View itemView) {
super(itemView);
}
}
在PostCardImageAdapter中重写getItemViewType并准备最后一个项目是FooterViewHolder。
@Override
public int getItemViewType(int position) {
if(position < data.size())
return ITEM;
else
return FOOTER;
}
使用方法的viewType参数在onCreateViewHolder中创建您的观察器
if (viewType == ITEM)
return new ItemViewHolder();
else
return new FooterViewHolder();
简而言之，RecyclerView不存在任何页脚或页眉视图，您可以将每个不同的视图与Viewholder分开，然后与位置或数据状态一起使用。