感谢您抽出时间阅读我的问题。 我一直在一个项目中工作，我必须在recyclerView中加载很多布局。
详细说明，包含
的Recycler列表视图我的设计是这样的，
我使用的代码，
我的Pojo（所有三个pojo的设计都一样）
public class Movie {
String title, genre, year;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getGenre() {
return genre;
}
public void setGenre(String genre) {
this.genre = genre;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public Movie(String title, String genre, String year) {
this.title = title;
this.genre = genre;
this.year = year;
}
}
我的RecyclerView适配器
public class MoviesAdapter extends RecyclerView.Adapter<MoviesAdapter.MyViewHolder> {
private List<Movie> moviesList;
private List<Movie1> moviesList1;
final int Movie = 0, Movie1 = 1;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView title, year, genre;
public MyViewHolder(View view, int viewType) {
super(view);
title = (TextView) view.findViewById(R.id.title);
genre = (TextView) view.findViewById(R.id.genre);
year = (TextView) view.findViewById(R.id.year);
}
}
public class MyViewHolder2 extends RecyclerView.ViewHolder {
public TextView title, year, genre;
public MyViewHolder2(View view, int Viewtype) {
super(view);
title = (TextView) view.findViewById(R.id.title);
genre = (TextView) view.findViewById(R.id.genre);
year = (TextView) view.findViewById(R.id.year);
}
}
@Override
public int getItemViewType(int position) {
if (moviesList.get(position) instanceof Movie) {
return Movie;
} else if (moviesList1.get(position) instanceof Movie1) {
return Movie1;
}
return -1;
}
public MoviesAdapter(List<Movie> moviesList, List<Movie1> moviesList1) {
this.moviesList = moviesList;
this.moviesList1 = moviesList1;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v;
MyViewHolder vh = null;
// create a new view
switch (viewType) {
case Movie: //This would be the header view in my Recycler
System.out.println("This is movie");
v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.movie_list_row, parent, false);
vh = new MyViewHolder(v, viewType);
return vh;
case Movie1: //This would be the header view in my Recycler
System.out.println("This is movie1");
v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.movie_row, parent, false);
vh = new MyViewHolder(v, viewType);
return vh;
default: //This would be the normal list with the pictures of the places in the world
return vh;
}
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
/* if (position == 0) {
Movie movie = moviesList.get(position);
holder.title.setText(movie.getTitle());
holder.genre.setText(movie.getTitle());
holder.year.setText(movie.getTitle());
//this means it is beyond the headerview now as it is no longer 0. For testing purposes, I'm alternating between two pics for now
} else if (position == 1) {
Movie1 movie = moviesList1.get(position);
holder.title.setText(movie.getTitle());
holder.genre.setText(movie.getGenre());
holder.year.setText(movie.getYear());
}*/
switch (holder.getItemViewType()) {
case Movie:
MyViewHolder vh1 = (MyViewHolder) holder;
Movie movie = (Movie) moviesList.get(position);
vh1.title.setText(movie.getTitle());
vh1.genre.setText(movie.getGenre());
vh1.year.setText(movie.getYear());
break;
case Movie1:
MyViewHolder vh2 = (MyViewHolder) holder;
Movie1 movie1=(Movie1)moviesList1.get(position);
vh2.title.setText(movie1.getTitle());
vh2.year.setText(movie1.getYear());
vh2.genre.setText(movie1.getGenre());
break;
default:
break;
}
}
@Override
public int getItemCount() {
return moviesList.size();
}
我的活动代码
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mAdapter = new MoviesAdapter(movieList, movieList1);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareMovieData();
prepareMovieData1();
并且prepareMovieData（）方法代码，
private void prepareMovieData() {
Movie movie = new Movie("Mad Max: Fury Road", "Action & Adventure", "2015");
movieList.add(movie);
movie = new Movie("Inside Out", "Animation, Kids & Family", "2015");
movieList.add(movie);
movie = new Movie("Star Wars: Episode VII - The Force Awakens", "Action", "2015");
movieList.add(movie);
movie = new Movie("Shaun the Sheep", "Animation", "2015");
movieList.add(movie);}
运行程序后，仅在我的回收站视图中加载第一个布局。任何帮助对我学习这些东西都会有很大帮助！
谢谢！
答案 0 :(得分：3)
将SimpleItemRecyclerViewAdapter替换为更多ComplexRecyclerViewAdapter，以便根据项目视图类型对不同类型的布局进行充气。
例如，您的RecyclerViewActivity需要包含对象列表，如下所示：
private ArrayList<Object> getSampleArrayList() {
ArrayList<Object> items = new ArrayList<>();
items.add(new Movie ("Mad Max: Fury Road", "Action & Adventure", "2015"));
items.add(new Theatres ("Something", "something"));
items.add(new Blockbuster ("Something else", "Something else"));
return items;
}
之后你需要三个类和布局，如MovieHolder.Java和movie_layout.java，如下所示： 公共类MovieHolder扩展了RecyclerView.ViewHolder {
private TextView title, gener,year;
public MovieHolder (View v) {
super(v);
title= (TextView) v.findViewById(R.id.title);
gener= (TextView) v.findViewById(R.id.gener);
year= (TextView) v.findViewById(R.id.year);
}
public TextView getTitle() {
return title;
}
public void setTitle(TextView title) {
this.title= title;
}
public TextView getGener() {
return gener;
}
public void setGener(TextView gener) {
this.gener= gener;
}
public TextView getYear() {
return year;
}
public void setYear(TextView year) {
this.label2 = year;
}
}
依旧......
之后你需要创建 ComplexRecyclerViewAdapter
public class ComplexRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
// The items to display in your RecyclerView
private List<Object> items;
private final int MOVIE= 0,THEATERS=1 , BLOCKBUSTER = 2;
// Provide a suitable constructor (depends on the kind of dataset)
public ComplexRecyclerViewAdapter(List<Object> items) {
this.items = items;
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return this.items.size();
}
@Override
public int getItemViewType(int position) {
if (items.get(position) instanceof Movie) {
return MOVIE;
} else if (items.get(position) instanceof Theatrs ) {
return THEATERS;
}else if (items.get(position) instanceof Blockbuster ) {
return BLOCKBUSTER ;
}
return -1;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
RecyclerView.ViewHolder viewHolder;
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
switch (viewType) {
case MOVIE:
View v1 = inflater.inflate(R.layout.movie_viewholder, viewGroup, false);
viewHolder = new ViewHolder1(v1);
break;
case THEATERS:
View v2 = inflater.inflate(R.layout.theater_viewholder2, viewGroup, false);
viewHolder = new ViewHolder2(v2);
break;
case BLOCKBUSTER :
View v3 = inflater.inflate(R.layout.layout_blockbuster, viewGroup, false);
viewHolder = new ViewHolder3(v3);
break;
default:
View v = inflater.inflate(android.R.layout.simple_list_item_1, viewGroup, false);
viewHolder = new RecyclerViewSimpleTextViewHolder(v);
break;
}
return viewHolder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
switch (viewHolder.getItemViewType()) {
case MOVIE:
ViewHolder1 vh1 = (ViewHolder1) viewHolder;
configureViewHolder1(vh1, position);
break;
case THEATERS:
ViewHolder2 vh2 = (ViewHolder2) viewHolder;
configureViewHolder2(vh2, position);
break;
case BLOCKBUSTER :
ViewHolder3 vh3 = (ViewHolder3) viewHolder;
configureViewHolder3(vh3, position);
break;
default:
RecyclerViewSimpleTextViewHolder vh = (RecyclerViewSimpleTextViewHolder) viewHolder;
configureDefaultViewHolder(vh, position);
break;
}
}
}
以下方法用于配置各个RecyclerView.ViewHolder对象：
private void configureDefaultViewHolder(RecyclerViewSimpleTextViewHolder vh, int position) {
vh.getLabel().setText((CharSequence) items.get(position));
}
private void configureViewHolder1(ViewHolder1 vh1, int position) {
Movie movie= (Movie ) items.get(position);
if (movie!= null) {
vh1.getTitle().setText("Name: " + movie.title);
vh1.getGener().setText("Gener: " + movie.gener);
vh1.getYear().setText("Year: " + movie.year);
}
}
.
.
.
//and same for other 2
在您运行该计划之前，最后一个重要的变化是更改bindDataToAdapter中的RecyclerViewActivity方法以设置ComplexRecyclerViewAdapter而不是SimpleItemRecyclerViewAdapter，如下所示：
private void bindDataToAdapter() {
// Bind adapter to recycler view object
recyclerView.setAdapter(new ComplexRecyclerViewAdapter(getSampleArrayList()));
}
答案 1 :(得分：0)
首先检查正常布局并正确连接或不查看布局的xml代码。
我的主要嫌疑人是getItemCount（）方法，你只返回一个列表的计数，我在recyclerview中看到了多个布局的许多其他实现，其中大多数使用单个列表并将一些字段设置为null并在onBindviewholder检索中只有特定布局需要的字段，希望这会有所帮助。
List<CityEvent> list = new ArrayList<>();
list.add(new CityEvent("London", null, CityEvent.CITY_TYPE));
list.add(new CityEvent("Droidcon", "Droidcon in London", CityEvent.EVENT_TYPE));
list.add(new CityEvent("Some event", "Some event in London", CityEvent.EVENT_TYPE));
list.add(new CityEvent("Amsterdam", null, CityEvent.CITY_TYPE));
list.add(new CityEvent("Droidcon", "Droidcon in Amsterdam", CityEvent.EVENT_TYPE));
list.add(new CityEvent("Berlin", null, CityEvent.CITY_TYPE));
list.add(new CityEvent("Droidcon", "Droidcon in Berlin", CityEvent.EVENT_TYPE));
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
CityEvent object = mList.get(position);
if (object != null) {
switch (object.getType()) {
case CITY_TYPE:
((CityViewHolder) holder).mTitle.setText(object.getName());
break;
case EVENT_TYPE:
((EventViewHolder) holder).mTitle.setText(object.getName());
((EventViewHolder) holder).mDescription.setText(object.getDescription());
break;
}
}
}
@Override
public int getItemCount() {
if (mList == null)
return 0;
return mList.size();
}