我尝试为RecyclerView中显示的ArrayList创建RecyclerViewHolder
但我对代码底部的公共ArrayList有疑问。我应该在其中使用public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerViewHolder> {
private static final String TAG = RecyclerViewAdapter.class.getSimpleName();
ArrayList<MovieItem> mMoviesItems;
private Context context;
public RecyclerViewAdapter(ArrayList<MovieItem> MoviesItems) {
mMoviesItems = MoviesItems;
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
context = viewGroup.getContext();
int layoutIdForListItem = R.layout.movie_list_item;
LayoutInflater inflater = LayoutInflater.from(context);
boolean shouldAttachToParentImmediately = false;
View view = inflater.inflate(layoutIdForListItem, viewGroup, shouldAttachToParentImmediately);
RecyclerViewHolder viewHolder = new RecyclerViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
holder.MoviePopularity.setText(mMoviesItems.get(position).getPopularity(popularity));
Picasso.with(this.context).load(mMoviesItems.get(position).getPhoto(poster_path)).into(holder.MoviePoster);
holder.MovieName.setText(mMoviesItems.get(position).getName(original_title));
}
@Override
public int getItemCount() {
return mMoviesItems.size();
}
class RecyclerViewHolder extends RecyclerView.ViewHolder {
TextView MoviePopularity;
ImageView MoviePoster;
TextView MovieName;
public RecyclerViewHolder(View itemView) {
super(itemView);
MoviePopularity = (TextView)itemView.findViewById(R.id.movie_popularity);
MoviePoster = (ImageView)itemView.findViewById(R.id.iv_item_movie);
MovieName = (TextView)itemView.findViewById(R.id.movie_name);
}
}
}
，还是像下面的代码一样：
onBindViewHolder()我也遇到问题public class MovieItem {
private double popularity;
private String photo;
private String name;
public MovieItem(double popularity, String poster_path, String original_title) {
this.popularity = this.popularity;
this.photo = photo;
this.name = name;
}
public double getPopularity(double popularity) { return popularity; }
public String getPhoto() { return photo; }
public String getName() {
return name;
}
}
我在poster_path，original_title和popular下遇到错误
这是我的自定义类代码：
Json public final class OpenMovieJsonUtils {
public static ArrayList<MovieItem> getSimpleMovieStringsFromJson(Context context, String moviesJsonString)
throws JSONException {
final String RESULTS = "results";
final String POPULARITY = "popularity";
final String POSTER_PATH = "poster_path";
final String ORIGINAL_TITLE = "original_title";
ArrayList<MovieItem> parsedMovieData = new ArrayList<MovieItem>();
JSONObject moviesObject = new JSONObject(moviesJsonString);
JSONArray moviesArray = moviesObject.getJSONArray(RESULTS);
for (int i = 0; i < moviesArray.length(); i++) {
double popularity;
String poster_path;
String original_title;
moviesObject = moviesArray.getJSONObject(i);
popularity = moviesObject.getDouble(POPULARITY);
poster_path = moviesObject.getString(POSTER_PATH);
original_title = moviesObject.getString(ORIGINAL_TITLE);
parsedMovieData.add(new MovieItem(popularity, poster_path, original_title));
}
return parsedMovieData;
}
}
数据类：
default []答案 0 :(得分：0)
您正在将人气字段初始化为相同的全局字段，因此默认情况下始终为null。还要更改您的getter方法。更改您的MovieItem类，如下所示：
public class MovieItem {
private double popularity;
private String photo;
private String name;
public MovieItem(double popularity, String poster_path, String original_title) {
this.popularity = popularity;
this.photo = photo;
this.name = name;
}
public double getPopularity() { return popularity; }
public String getPhoto() { return photo; }
public String getName() { return name; }
现在改变你的onBindViewHolder方法：
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
holder.MoviePopularity.setText(String.valueOf(mMoviesItems.get(position).getPopularity()));
Picasso.with(this.context).load(mMoviesItems.get(position).getPhoto()).into(holder.MoviePoster);
holder.MovieName.setText(mMoviesItems.get(position).getName());
}