子項目は私のアダプタクラス拡張リサイクルビュー

Question

にこれはされて表示されない

public class GenreAdapter extends ExpandableRecyclerViewAdapter<GenreViewHolder, ArtistViewHolder> { 
    Context context ; 
    LayoutInflater inflater ; 

    public GenreAdapter(List<? extends ExpandableGroup> groups,Context context) { 
     super(groups); 
     this.context = context ; 
     inflater = LayoutInflater.from(context); 
    } 

    @Override 
    public GenreViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) { 
     //LayoutInflater inflater = LayoutInflater.from(context); 
     View view = inflater.inflate(R.layout.list_item_genre, parent, false); 
     return new GenreViewHolder(view); 
    } 

    @Override 
    public ArtistViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) { 
     View view = inflater.inflate(R.layout.list_item_artist, parent, false); 
     return new ArtistViewHolder(view); 
    } 

    @Override 
    public void onBindChildViewHolder(ArtistViewHolder holder, int flatPosition, ExpandableGroup group, 
             int childIndex) { 
     final Artist artist =(Artist) group.getItems().get(childIndex); 
     holder.setArtistName(artist.getName()); 
    } 

    @Override 
    public void onBindGroupViewHolder(GenreViewHolder holder, int flatPosition, 
             ExpandableGroup group) { 
     holder.setGenreTitle(group); 
    } 
} 

これは私のモデルクラス

package com.nmn.expandablerecycler.utils; 

import android.os.Parcel; 
import android.os.Parcelable; 

import com.thoughtbot.expandablerecyclerview.models.ExpandableGroup; 

import java.util.List; 


public class Artist implements Parcelable { 

    private String name; 
    private boolean isFavorite; 


    public Artist(String name, boolean isFavorite) { 
     this.name = name; 
     this.isFavorite = isFavorite; 
    } 

    protected Artist(Parcel in) { 
     name = in.readString(); 
    } 

    public String getName() { 
     return name; 
    } 
    /* public String getTitle() 
    { 
     return title ; 
    }*/ 
    public boolean isFavorite() { 
     return isFavorite; 
    } 

    @Override 
    public boolean equals(Object o) { 
     if (this == o) return true; 
     if (!(o instanceof Artist)) return false; 

     Artist artist = (Artist) o; 

     if (isFavorite() != artist.isFavorite()) return false; 
     return getName() != null ? getName().equals(artist.getName()) : artist.getName() == null; 

    } 

    @Override 
    public int hashCode() { 
     int result = getName() != null ? getName().hashCode() : 0; 
     result = 31 * result + (isFavorite() ? 1 : 0); 
     return result; 
    } 

    @Override 
    public void writeToParcel(Parcel dest, int flags) { 
     dest.writeString(name); 
    } 

    @Override 
    public int describeContents() { 
     return 0; 
    } 

    public static final Creator<Artist> CREATOR = new Creator<Artist>() { 
     @Override 
     public Artist createFromParcel(Parcel in) { 
      return new Artist(in); 
     } 

     @Override 
     public Artist[] newArray(int size) { 
      return new Artist[size]; 
     } 
    }; 
} 


public class Genre extends ExpandableGroup<Artist> { 

    public Genre(String title, List<Artist> items) { 
     super(title, items); 
    } 
} 

>This are my viewholder classes 
public class ArtistViewHolder extends ChildViewHolder { 

    private TextView artistName; 

    public ArtistViewHolder(View itemView) { 
     super(itemView); 
     artistName = (TextView) itemView.findViewById(R.id.artist_name); 
    } 

    public void onBind(Artist artist) { 
     artistName.setText(artist.getName()); 
    } 

    public void setArtistName (String name) 
    { 

    } 
} 


public class GenreViewHolder extends GroupViewHolder { 

     private TextView genreTitle; 

     public GenreViewHolder(View itemView) { 
      super(itemView); 
      genreTitle =(TextView) itemView.findViewById(R.id.genre_title); 
     } 

     public void setGenreTitle(ExpandableGroup group) { 
      genreTitle.setText(group.getTitle()); 
     } 
} 

>this is the main activity 

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     ArrayList<Artist>artists = new ArrayList<>(); 
     for (int i = 0 ; i<6 ;i++) 
     { 
      artists.add(new Artist("naman",true)); 
     } 

     ArrayList<Genre> genres = new ArrayList<>(); 
     for (int i = 0 ; i<6 ;i++) 
     { 
      genres.add(new Genre("Sufi",artists)); 
     } 


     RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view); 
     LinearLayoutManager layoutManager = new LinearLayoutManager(this); 

     //instantiate your adapter with the list of genres 
     GenreAdapter adapter = new GenreAdapter(genres,this); 
     recyclerView.setLayoutManager(layoutManager); 
     recyclerView.setAdapter(adapter); 
    } 
} 

上のテキストですアーティスト（子）の名前は表示されません。拡大し、同様に私は はこれが愚かに聞こえるかもしれません。この拡張recyclerview

Answer 1

男子（アーティスト）項目のテキストを表示する方法を知っている.Let崩れるが、あなたのsetArtistName方法が空の親（ジャンルテキスト）Althiugh 。このコードにartistName.setText(artist.getName());

Answer 2

を貼り付け、ライブラリのドキュメントは、ちょうどあなたが作成した空のメソッドをsetArtistNameして削除するには[OnBind]のからのメソッドの名前を変更するには、このスニペットでエラー

public void onBind(Artist artist) { 
    artistName.setText(artist.getName()); 
} 

public void setArtistName (String name) 
{ 

} 

を持っています。