ausgewählt Bild Schaltfläche ändert ihre Position in RecyclerView beim Scrollen

Question

Ich habe eine Recyclerview in meiner MainActivity und ich zeige keine der Elemente in Listenweise durch RecyclerView.Adapter. hier ist meine recyclerview_list_items.xml Datei,

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" 
    android:padding="10dp"> 

    <ImageView 
     android:id="@+id/person_photo" 
     android:layout_width="50dp" 
     android:layout_height="50dp" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentTop="true" 
     android:scaleType="centerCrop" 
     android:src="@drawable/rounded_img" /> 

    <TextView 
     android:id="@+id/person_name" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentTop="true" 
     android:layout_toLeftOf="@+id/btnfollow" 
     android:layout_toRightOf="@+id/person_photo" 
     android:ellipsize="end" 
     android:paddingLeft="10dp" 
     android:paddingRight="4dp" 
     android:singleLine="true" 
     android:text="*********" 
     android:textColor="#303030" 
     android:textSize="17sp" /> 

    <ImageButton 
     android:id="@+id/btnfollow" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentRight="true" 
     android:layout_marginRight="8dp" 
     android:layout_marginTop="4dp" 
     android:background="@drawable/follow_inactive" /> 

</RelativeLayout> 

und hier ist meine Adapter Klassendatei,

public class SuggestionListItemAdapter extends RecyclerView.Adapter<SuggestionListItemAdapter.MyViewHolder> { 
    private List<MovieData> moviesList; 
    Context context; 
    private boolean isButtonClicked = false; 
    public class MyViewHolder extends RecyclerView.ViewHolder { 
     public TextView person_name; 
     ImageView person_photo; 
     ImageButton person_follow; 
     public MyViewHolder(View view) { 
      super(view); 
      person_photo = (ImageView) view.findViewById(R.id.person_photo); 
      person_name = (TextView) view.findViewById(R.id.person_name); 
      person_follow = (ImageButton) view.findViewById(R.id.btnfollow); 
     } 
    } 
    public SuggestionListItemAdapter(Context mContext,List<MovieData> moviesList) { 
     this.moviesList = moviesList; 
     this.context=mContext; 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.recyclerview_list_items, parent, false); 

     MyViewHolder viewHolder = new MyViewHolder(v); 

     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(MyViewHolder holder, int position) { 
     MovieData movieData = moviesList.get(position); 

     holder.person_name.setText(movieData.getGenre()); 
     holder.person_photo.setImageResource(movieData.getPhoto()); 
     holder.person_follow.setOnClickListener(clickListener); 
     holder.person_follow.setTag(holder); 
    } 

     View.OnClickListener clickListener = new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 

       if (v.getId() == R.id.btnfollow) { 
        isButtonClicked = !isButtonClicked; // toggle the boolean flag 
        v.setBackgroundResource(isButtonClicked ? R.drawable.following_img : R.drawable.follow_inactive); 
       } 

      } 
     }; 


    @Override 
    public int getItemCount() { 
     return moviesList.size(); 
    } 


} 

Ein Klick auf holder.person_follow Bild-Taste, Bild ziehbar bg entsprechend verändert, was ich will, aber wenn ich die Seite verschiebe Zu dieser Zeit Bild zeichnend bg seine Position automatisch ändern. für Beispiel Wenn ich die Bildschaltfläche pos = 1 wähle, ändert sich nach dem Blättern der Seite die gewählte Knopfposition.

Answer 1

Statt isButtonClicked in adapter class Ort, um es in MovieData modal class.Then Platzierung machen folgende Änderungen in Ihrem adapter class:

public class SuggestionListItemAdapter extends RecyclerView.Adapter<SuggestionListItemAdapter.MyViewHolder> { 
private List<MovieData> moviesList; 
Context context; 

public class MyViewHolder extends RecyclerView.ViewHolder { 
    public TextView person_name; 
    ImageView person_photo; 
    ImageButton person_follow; 
    public MyViewHolder(View view) { 
     super(view); 
     person_photo = (ImageView) view.findViewById(R.id.person_photo); 
     person_name = (TextView) view.findViewById(R.id.person_name); 
     person_follow = (ImageButton) view.findViewById(R.id.btnfollow); 
    } 
} 
public SuggestionListItemAdapter(Context mContext,List<MovieData> moviesList) { 
    this.moviesList = moviesList; 
    this.context=mContext; 
} 

@Override 
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View v = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.recyclerview_list_items, parent, false); 

    MyViewHolder viewHolder = new MyViewHolder(v); 

    return viewHolder; 
} 

@Override 
public void onBindViewHolder(final MyViewHolder holder, int position) { 
    final MovieData movieData = moviesList.get(position); 

    holder.person_name.setText(movieData.getGenre()); 
    holder.person_photo.setImageResource(movieData.getPhoto()); 
    holder.person_follow.setBackgroundResource(movieData.isButtonClicked() ? R.drawable.following_img : R.drawable.follow_inactive); 
    holder.person_follow.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      movieData.setIsButtonClicked(!movieData.isButtonClicked()); 
      holder.person_follow.setBackgroundResource(movieData.isButtonClicked() ? R.drawable.following_img : R.drawable.follow_inactive); 
     } 
    }); 
    holder.person_follow.setTag(holder); 
} 

@Override 
public int getItemCount() { 
    return moviesList.size(); 
} 

}