Android 无法在recyclerview中添加第二个子项

无法在

Recyclerview

中添加第二个子布局。我正在将两个不同的数组传递到

RecyclerAdapter

以显示具有不同数据和视图的两个子布局。是否有任何解决方案可以使用相同的标题布局添加不同的子布局。我在垂直

Recyclerview

中添加了水平

Recyclerview

，并且想显示我附加的图像的详细信息吗

private void setupRecyclerView(RecyclerView recyclerView) {
     recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
     RecyclerAdapter recyclerAdapter = new RecyclerAdapter();

     int[] images = new int[]{
         R.drawable.finance,
         R.drawable.business,
         R.drawable.financejob,
         R.drawable.ecomchallenges
     };

     ArrayList<ChildView> childViews = new ArrayList<>();
     childViews.add(new ChildView(images[0], "The \"Best\" Startup Pitch Deck - How To Raise Venture Capital", "$100"));
     childViews.add(new ChildView(images[1], "An Entire MBA in 1 Course:Award Winning Business School Prof", "$100"));
     childViews.add(new ChildView(images[2], "What Finance Job is for You? Explanation of 14 Finance Roles", "$100"));
     childViews.add(new ChildView(images[3], "Learn To Build Beautiful HTML5 And CSS3 Websites In 1 Month", "$100"));

     int[] courseImage = new int[] {
         R.drawable.php,
         R.drawable.development,
         R.drawable.web,
         R.drawable.java
     };

     ArrayList<CourseByType> courseByTypes = new ArrayList<>();
     courseByTypes.add(new CourseByType("Technology", courseImage[0]));
     courseByTypes.add(new CourseByType("Business", courseImage[1]));
     courseByTypes.add(new CourseByType("Photography", courseImage[2]));
     courseByTypes.add(new CourseByType("Development", courseImage[3]));
     Log.d("","Above adapter");
     recyclerAdapter.addItem(new GroupView("Business", childViews));
     Log.d("","Below Child");
     recyclerAdapter.addCourseByType(new CourseByHeader("Technology", courseByTypes));
     Log.d("","Below Course");
     recyclerView.setAdapter(recyclerAdapter);

 }

此

RecyclerAdapter

包含一个

RecyclerView

，第一行有一个图像和3个

TextView

，第二行有1个

ImageView

和1个

TextView

。在第一个位置，会显示一个图像和三个文本视图，但不会在第二个视图上显示

这是我在emulator上运行后得到的视图

这是回收新闻的两个子项

ChildView.java

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {

    ArrayList<PassValues> containerArrayList;

    ArrayList<GroupView> groupViews;
    ArrayList<CourseByHeader>courseByHeaders;
    private static final int TYPE_HEADER = 0;
    private static final int TYPE_ITEM = 1;


    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        View view = LayoutInflater.from(context).inflate(R.layout.group_title, parent, false);
        return new ViewHolder(view);
    }

    public RecyclerAdapter(){
        containerArrayList = new ArrayList<>();
        groupViews = new ArrayList<>();
        courseByHeaders = new ArrayList<>();
    }

    public void addContainer(PassValues container){
        containerArrayList.add(container);


    }
    public void addItem(GroupView groupView){
        Log.d("","Inside Group method");
        groupViews.add(groupView);
    }
    public void addCourseByType(CourseByHeader courseByHeader){
        Log.d("","Inside Course method");
        courseByHeaders.add(courseByHeader);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Log.d("", "Pass Values out of IF" + position);
        ChildViewAdapter childViewAdapter = new ChildViewAdapter();
        if(position == 0){
            GroupView groupView = groupViews.get(position);
            holder.title.setText(groupView.getTitle());
            Log.d("", "Passing Values" + groupView.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addChild(groupView.getChildViewList());
            holder.recyclerView.setAdapter(childViewAdapter);
        }
        if (position == 1) {
            CourseByHeader courseByHeader = courseByHeaders.get(position);
            holder.title.setText(courseByHeader.getTitle());
            Log.d("", "Passing Values" + courseByHeader.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addCourse(courseByHeader.getCourseByTypes());
            holder.recyclerView.setAdapter(childViewAdapter);
        }

    }

    @Override
    public int getItemCount() {
        if(getItemViewType(0) == TYPE_HEADER)
        return groupViews.size() ;
        if (getItemViewType(1) == TYPE_ITEM)
            return courseByHeaders.size();
        else return -1;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView title;
        RecyclerView recyclerView;
        public ViewHolder(View itemView) {
            super(itemView);

            title = (TextView)itemView.findViewById(R.id.course_title);
            recyclerView = (RecyclerView)itemView.findViewById(R.id.group_recycler);

        }
    }
}

public class ChildView {

    int image;
    String course, price;

    public ChildView(int image, String course, String price) {
        this.image = image;
        this.course = course;
        this.price = price;
    }


    public int getImage() {
        return image;
    }

    public String getCourse() {
        return course;
    }

    public String getPrice() {
        return price;
    }

}

public class CourseByHeader {

    String title;
    ArrayList<CourseByType> courseByTypes;

    public CourseByHeader(String title, ArrayList<CourseByType> courseByTypes) {
        this.title = title;
        this.courseByTypes = courseByTypes;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<CourseByType> getCourseByTypes() {
        return courseByTypes;
    }
}

public class GroupView {
    String title;
    ArrayList<ChildView> childViewList;

    String courseBy;
    ArrayList<CourseByType> courseByTypes;

    public GroupView(String title, ArrayList<ChildView> childViewList) {
        this.title = title;
        this.childViewList = childViewList;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<ChildView> getChildViewList() {
        return childViewList;
    }
}

CourseByType.java

public class CourseByType {

    String courseName;
    int courseImage;

    public CourseByType(String courseName, int courseImage) {
        this.courseName = courseName;
        this.courseImage = courseImage;
    }

    public String getCourseName() {
        return courseName;
    }

    public int getCourseImage() {
        return courseImage;
    }
}

CourseByHeader.java

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {

    ArrayList<PassValues> containerArrayList;

    ArrayList<GroupView> groupViews;
    ArrayList<CourseByHeader>courseByHeaders;
    private static final int TYPE_HEADER = 0;
    private static final int TYPE_ITEM = 1;


    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        View view = LayoutInflater.from(context).inflate(R.layout.group_title, parent, false);
        return new ViewHolder(view);
    }

    public RecyclerAdapter(){
        containerArrayList = new ArrayList<>();
        groupViews = new ArrayList<>();
        courseByHeaders = new ArrayList<>();
    }

    public void addContainer(PassValues container){
        containerArrayList.add(container);


    }
    public void addItem(GroupView groupView){
        Log.d("","Inside Group method");
        groupViews.add(groupView);
    }
    public void addCourseByType(CourseByHeader courseByHeader){
        Log.d("","Inside Course method");
        courseByHeaders.add(courseByHeader);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Log.d("", "Pass Values out of IF" + position);
        ChildViewAdapter childViewAdapter = new ChildViewAdapter();
        if(position == 0){
            GroupView groupView = groupViews.get(position);
            holder.title.setText(groupView.getTitle());
            Log.d("", "Passing Values" + groupView.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addChild(groupView.getChildViewList());
            holder.recyclerView.setAdapter(childViewAdapter);
        }
        if (position == 1) {
            CourseByHeader courseByHeader = courseByHeaders.get(position);
            holder.title.setText(courseByHeader.getTitle());
            Log.d("", "Passing Values" + courseByHeader.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addCourse(courseByHeader.getCourseByTypes());
            holder.recyclerView.setAdapter(childViewAdapter);
        }

    }

    @Override
    public int getItemCount() {
        if(getItemViewType(0) == TYPE_HEADER)
        return groupViews.size() ;
        if (getItemViewType(1) == TYPE_ITEM)
            return courseByHeaders.size();
        else return -1;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView title;
        RecyclerView recyclerView;
        public ViewHolder(View itemView) {
            super(itemView);

            title = (TextView)itemView.findViewById(R.id.course_title);
            recyclerView = (RecyclerView)itemView.findViewById(R.id.group_recycler);

        }
    }
}

public class ChildView {

    int image;
    String course, price;

    public ChildView(int image, String course, String price) {
        this.image = image;
        this.course = course;
        this.price = price;
    }


    public int getImage() {
        return image;
    }

    public String getCourse() {
        return course;
    }

    public String getPrice() {
        return price;
    }

}

public class CourseByHeader {

    String title;
    ArrayList<CourseByType> courseByTypes;

    public CourseByHeader(String title, ArrayList<CourseByType> courseByTypes) {
        this.title = title;
        this.courseByTypes = courseByTypes;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<CourseByType> getCourseByTypes() {
        return courseByTypes;
    }
}

public class GroupView {
    String title;
    ArrayList<ChildView> childViewList;

    String courseBy;
    ArrayList<CourseByType> courseByTypes;

    public GroupView(String title, ArrayList<ChildView> childViewList) {
        this.title = title;
        this.childViewList = childViewList;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<ChildView> getChildViewList() {
        return childViewList;
    }
}

公共类课程主持人{
字符串标题；
arraylistcoursebytypes；
公共CourseByHeader（字符串标题，ArrayList courseByTypes）{
this.title=标题；
this.courseByTypes=courseByTypes；
}
公共字符串getTitle（）{
返回标题；
}
公共阵列列表getCourseByTypes（）{
返回课程类型；
}
}

GroupView.java

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {

    ArrayList<PassValues> containerArrayList;

    ArrayList<GroupView> groupViews;
    ArrayList<CourseByHeader>courseByHeaders;
    private static final int TYPE_HEADER = 0;
    private static final int TYPE_ITEM = 1;


    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        View view = LayoutInflater.from(context).inflate(R.layout.group_title, parent, false);
        return new ViewHolder(view);
    }

    public RecyclerAdapter(){
        containerArrayList = new ArrayList<>();
        groupViews = new ArrayList<>();
        courseByHeaders = new ArrayList<>();
    }

    public void addContainer(PassValues container){
        containerArrayList.add(container);


    }
    public void addItem(GroupView groupView){
        Log.d("","Inside Group method");
        groupViews.add(groupView);
    }
    public void addCourseByType(CourseByHeader courseByHeader){
        Log.d("","Inside Course method");
        courseByHeaders.add(courseByHeader);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Log.d("", "Pass Values out of IF" + position);
        ChildViewAdapter childViewAdapter = new ChildViewAdapter();
        if(position == 0){
            GroupView groupView = groupViews.get(position);
            holder.title.setText(groupView.getTitle());
            Log.d("", "Passing Values" + groupView.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addChild(groupView.getChildViewList());
            holder.recyclerView.setAdapter(childViewAdapter);
        }
        if (position == 1) {
            CourseByHeader courseByHeader = courseByHeaders.get(position);
            holder.title.setText(courseByHeader.getTitle());
            Log.d("", "Passing Values" + courseByHeader.getTitle());
            holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            holder.recyclerView.setOnFlingListener(null);
            childViewAdapter.addCourse(courseByHeader.getCourseByTypes());
            holder.recyclerView.setAdapter(childViewAdapter);
        }

    }

    @Override
    public int getItemCount() {
        if(getItemViewType(0) == TYPE_HEADER)
        return groupViews.size() ;
        if (getItemViewType(1) == TYPE_ITEM)
            return courseByHeaders.size();
        else return -1;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView title;
        RecyclerView recyclerView;
        public ViewHolder(View itemView) {
            super(itemView);

            title = (TextView)itemView.findViewById(R.id.course_title);
            recyclerView = (RecyclerView)itemView.findViewById(R.id.group_recycler);

        }
    }
}

public class ChildView {

    int image;
    String course, price;

    public ChildView(int image, String course, String price) {
        this.image = image;
        this.course = course;
        this.price = price;
    }


    public int getImage() {
        return image;
    }

    public String getCourse() {
        return course;
    }

    public String getPrice() {
        return price;
    }

}

public class CourseByHeader {

    String title;
    ArrayList<CourseByType> courseByTypes;

    public CourseByHeader(String title, ArrayList<CourseByType> courseByTypes) {
        this.title = title;
        this.courseByTypes = courseByTypes;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<CourseByType> getCourseByTypes() {
        return courseByTypes;
    }
}

public class GroupView {
    String title;
    ArrayList<ChildView> childViewList;

    String courseBy;
    ArrayList<CourseByType> courseByTypes;

    public GroupView(String title, ArrayList<ChildView> childViewList) {
        this.title = title;
        this.childViewList = childViewList;
    }

    public String getTitle() {
        return title;
    }

    public ArrayList<ChildView> getChildViewList() {
        return childViewList;
    }
}

公共类组视图{
字符串标题；
ArrayList儿童视图列表；
弦琴；
arraylistcoursebytypes；
公共组视图（字符串标题，ArrayList子视图列表）{
this.title=标题；
this.childViewList=childViewList；
}
公共字符串getTitle（）{
返回标题；
}
公共阵列列表getChildViewList（）{
返回子视图列表；
}
}

Groupview和CouseByType类具有recycleradapter的标题和子列表

ChildViewAdapter.java

public class ChildViewAdapter extends RecyclerView.Adapter {

    ArrayList<ChildView> childViewList;
    ArrayList<CourseByType> courseByTypes;
    private static final int TYPE_HEADER = 0;
    private static final int TYPE_ITEM = 1;

    public class ViewHolder extends RecyclerView.ViewHolder{
        public ViewHolder(View itemView) {
            super(itemView);
        }
    }

    public class GroupHolder extends ViewHolder {
        public ImageView iamView;
        public TextView course, price;
        public GroupHolder(View itemView) {
            super(itemView);
            iamView = (ImageView) itemView.findViewById(R.id.course_image);
            course = (TextView) itemView.findViewById(R.id.course_by);
            price = (TextView) itemView.findViewById(R.id.price);
        }
    }

    public void addCourse(ArrayList<CourseByType> courseByType){
        courseByTypes = courseByType;
    }
    public void addChild(ArrayList<ChildView> childView){
        childViewList = childView;
    }

    public class Course extends ViewHolder {

        public ImageView courseTypeImage;
        public TextView courseType;

        public Course(View itemView) {
            super(itemView);
            courseTypeImage = (ImageView)itemView.findViewById(R.id.course_image);
            courseType = (TextView)itemView.findViewById(R.id.course_name_course);
        }
    }

    public ChildViewAdapter() {
        childViewList = new ArrayList<>();
        courseByTypes = new ArrayList<>();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        RecyclerView.ViewHolder vh = null;
        View v;
        if(viewType == TYPE_HEADER){
            v = LayoutInflater.from(context).inflate(R.layout.recycler_item, parent, false);
            return new GroupHolder(v);
        }if(viewType == TYPE_ITEM){
            v = LayoutInflater.from(context).inflate(R.layout.type_of_courses, parent, false);
            return new Course(v);
        }
        return vh;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if(holder instanceof GroupHolder){
            Log.d("","instance of Group Holder");
            ChildView childView = childViewList.get(position);
            ((GroupHolder)holder).iamView.setImageResource(childView.getImage());
            ((GroupHolder)holder).course.setText(childView.getCourse());
            ((GroupHolder)holder).price.setText(childView.getPrice());
            return;
        }
        if(holder instanceof Course){
            Log.d("","instance of Course ");
            CourseByType courseByType = courseByTypes.get(position);
            ((Course)holder).courseTypeImage.setImageResource(courseByType.getCourseImage());
            ((Course)holder).courseType.setText(courseByType.getCourseName());
            return;
        }

    }


    @Override
    public int getItemCount() {
        int size;
        if(childViewList.size()>0){
            return size = childViewList.size();
        }else return size = courseByTypes.size();
    }

    @Override
    public int getItemViewType(int position) {
        if(childViewList.size() != 0 && childViewList.size()>0){
            return TYPE_HEADER;
        }else return TYPE_ITEM;
    }


}

公共类ChildViewAdapter扩展了RecyclerView.Adapter{ ArrayList儿童视图列表； arraylistcoursebytypes； 私有静态最终int TYPE_头=0； 私有静态最终整数类型\ u项=1； 公共类ViewHolder扩展了RecyclerView.ViewHolder{ 公共视图持有者（视图项视图）{ 超级（项目视图）； } } 公共类GroupHolder扩展了ViewHolder{ 公众形象观； 公共文本查看课程、价格； 公共组持有人（查看项目视图）{ 超级（项目视图）； iamView=（ImageView）itemView.findViewById（R.id.course\u image）； course=（TextView）itemView.findViewById（R.id.course\u by）； price=（TextView）itemView.findViewById（R.id.price）； } } public void addCourse（ArrayList courseByType）{ courseByTypes=courseByType； } public void addChild（ArrayList childView）{ childViewList=childView； } 公共课程扩展了ViewHolder{ 公众形象；公众形象； 公共文本视图课程类型； 公共课程（查看项目视图）{ 超级（项目视图）； courseTypeImage=（ImageView）itemView.findViewById（R.id.course\u image）； courseType=（TextView）itemView.findViewById（R.id.course\u name\u course）； } } 公共子视图适配器（）{ childViewList=新建ArrayList（）； courseByTypes=newarraylist（）； } @凌驾 public RecyclerView.ViewHolder onCreateViewHolder（视图组父级，int-viewType）{ Context=parent.getContext（）； RecyclerView.ViewHolder vh=null； 观点五； if（viewType==类型\标题）{ v=布局展开器。从（上下文）。充气（R.layout.recycler\u项，父项，false）； 返回新的集团持有人（v）； }if（viewType==类型\项）{ v=布局更平坦。从（上下文）。充气（R.layout.type\u of_courses，parent，false）； 返回新课程（五）； } 返回vh； } @凌驾 BindViewHolder上的公共无效（RecyclerView.ViewHolder，int位置）{ if（组持有人的持有人实例）{ Log.d（“，”集团持有人实例”）； ChildView ChildView=childViewList.get（位置）； （（GroupHolder）holder.iamView.setImageResource（childView.getImage（））； （（GroupHolder）holder.course.setText（childView.getCourse（））； （（GroupHolder）holder.price.setText（childView.getPrice（））； 返回； } if（课程持有人实例）{ Log.d（“，”当然是“实例”）； CourseByType CourseByType=courseByTypes.get（位置）； （（课程）持有者）.courseTypeImage.setImageResource（courseByType.getCourseImage（））； （（课程）持有者）.courseType.setText（courseByType.getCourseName（））； 返回； } } @凌驾 public int getItemCount（）{ 整数大小； 如果（childViewList.size（）>0）{ 返回大小=childViewList.size（）； }else返回大小=courseByTypes.size（）； } @凌驾 public int getItemViewType（int位置）{ 如果（childViewList.size（）！=0&&childViewList.size（）>0）{ 返回类型_头； }else返回类型_项； } }

---

此childview适配器有两种视图类型：第一种是一个图像和3个文本，第二种视图类型包含一个图像和一个文本。当我从片段传递值时，只显示第一种视图类型，而第二种视图类型不从片段获取值。

要在recyclerview中显示多个不同的视图，必须重写

getItemViewType（）

在recyclerview适配器中

 //getItemViewType enables dynamic viewholder creation
@Override
public int getItemViewType(int position) {
    //you will need to add a integer with variable name viewTypeCode
    //for view1 set viewTypeCode = 100 and for view2 set viewTypeCode = 200
    viewTypeCode = itemList.get(position).getViewTypeCode();
    return viewTypeCode;
}

这就是为什么对于多个视图类型，

onCreateViewHolder

会有所不同。你必须像这样修改你的

@Override
public FeedViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    switch (viewType) {
        case 100: return new FeedViewHolder(layoutInflater.inflate(R.layout.v1, parent, false),100);
        case 200: return new FeedViewHolder(layoutInflater.inflate(R.layout.v2, parent, false),200);
    }
    return null;
}

OnBindViewHolder

也将进行类似修改

 @Override
public void onBindViewHolder(final FeedViewHolder holder, int position) {
     viewTypeCode = itemList.get(position).getViewTypeCode();
    switch ( viewTypeCode) {
        case 100:
           //your code for v1

        case 200:
            //your code for v2
    }
}

类似地，修改了ViewHolder类

class FeedViewHolder extends RecyclerView.ViewHolder{
   //declare variables here
  public FeedViewHolder(View v, int viewType) {
        super(v);
        switch (viewType) {
        //instead of itemView.findViewById you will have to use v.findViewById
        case 100:
           //your code for v1

        case 200:
            //your code for v2
    }
}

有关更多参考，请参阅SO答案

不要通过两个单独的列表。Mak