Android RecyclerView - 当我更改第一个项目时，最后更改

Question

我为我的英语道歉，我是法国人。

我在RecyclerView列表有问题。实际上，我想动态地更改项目的TextView。但是，当我改变第一个项目的textView时，最后一个也改变了。我使用CardView来表示我的物品。

我不认为这是我的代码，而是RecyclerView的特殊性。

预先感谢您

我的适配器

public class CardAgendaAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements TimePickerDialog.OnTimeSetListener { 

    private static final int LENGTH = 7; 
    static private final int test[] = {1, 1, 1, 1, 1, 1, 1}; 
    private int[][] dispo = new int[7][4]; 
    private Context context; 
    private int startHour = -1; 
    private int finishHour = -1; 
    private int startMinute = -1; 
    private int finishMinute = -1; 
    private int pos = 0; 
    private RecyclerView.ViewHolder holderr; 

    public CardAgendaAdapter(Context context) { 
     this.context = context; 
     for (int i = 0; i < LENGTH; i++) { 
      dispo[i][0] = -1; 
      dispo[i][1] = -1; 
      dispo[i][2] = -1; 
      dispo[i][3] = -1; 
     } 
    } 

    @Override 
    public int getItemViewType(int position) { 
     // Just as an example, return 0 or 2 depending on position 
     // Note that unlike in ListView adapters, types don't have to be contiguous 
     return test[position]; 
    } 

    @Override 
    public int getItemCount() { 
     return LENGTH; 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     LayoutInflater inflater = LayoutInflater.from(parent.getContext()); 
     View view1 = inflater.inflate(R.layout.agenda_modify_card, parent, false); 
     View view2 = inflater.inflate(R.layout.agenda_card, parent, false); 

     switch (viewType) { 
      case 0: return new ViewHolder0(view1); 
      case 1: return new ViewHolder2(view2); 
     } 
     return null; 
    } 

    static final String days[] = {"Lundi", "Mardi","Mercredi","Jeudi","Vendredi","Samedi","Dimanche"}; 

    @Override 
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) { 
     switch (getItemViewType(position)) { 
      case 1 : 
       ViewHolder2 v2 = (ViewHolder2) holder; 
       v2.setDay(days[position]); 
       v2.setImage(position); 
       Log.d("item : ", String.valueOf(position)); 
       v2.add.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         pos = position; 
         holderr = holder; 
         TimePickerDialog timePickerDialog = new TimePickerDialog(context, listener, 0, 0, true); 
         timePickerDialog.show(); 
        } 
       }); 
       break; 
      case 0: 
       ViewHolder0 v0 = (ViewHolder0) holder; 
       v0.setTextCard(); 
       v0.setDay(days[position]); 
       v0.setImage(position); 
       break; 
     } 
    } 

    public String testText(int startHour, int startMinute, int finishHour, int finishMinute) { 
     return String.valueOf(Html.fromHtml("Vous êtes disponnible de <b>" + String.valueOf(startHour) + "h" + String.valueOf(startMinute) +"</b> à <b> "+ String.valueOf(finishHour)+"h" +String.valueOf(finishMinute)+"</b>")); 
    } 

    public void setHour(int poistion, int startHour, int startMinute, int finishHour, int finishMinute, final RecyclerView.ViewHolder holder) { 
     dispo[poistion][0] = startHour; 
     dispo[poistion][1] = startMinute; 
     dispo[poistion][2] = finishHour; 
     dispo[poistion][3] = finishMinute; 

     switch (getItemViewType(poistion)) { 
      case 1: 
       ViewHolder2 v2 = (ViewHolder2) holder; 
       v2.setTextCard(startHour,startMinute,finishHour,finishMinute); 
       //view.findViewById(R.id.button_add).setVisibility(View.INVISIBLE); 
       //view.findViewById(R.id.button_modify).setVisibility(View.VISIBLE); 
     } 

     Log.d("Jour : " + poistion, String.valueOf(dispo[poistion][0])); 
     Log.d("Jour : " + poistion, String.valueOf(dispo[poistion][1])); 
     Log.d("Jour : " + poistion, String.valueOf(dispo[poistion][2])); 
     Log.d("Jour : " + poistion, String.valueOf(dispo[poistion][3])); 
    } 

    private void reinitHour() { 
     startHour = -1; 
     startMinute = -1; 
    } 

    @Override 
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
     TimePickerDialog timePickerDialog2; 
     Log.d("Picker la", "AVANT"); 
     timePickerDialog2 = new TimePickerDialog(context, listener, 0, 0, true); 
     Log.d("Picker la", "APRÈS"); 
     timePickerDialog2.show(); 
    } 

    protected TimePickerDialog.OnTimeSetListener listener = 
      new TimePickerDialog.OnTimeSetListener() { 

       @Override 
       public void onTimeSet(TimePicker view, int hourOfDay, int minuteOfDay) { 
        if (startHour == -1 && startMinute == -1) { 
         startHour = hourOfDay; 
         startMinute = minuteOfDay; 

         TimePickerDialog timePickerDialog2; 
         timePickerDialog2 = new TimePickerDialog(context, listener, 0, 0, true); 

         timePickerDialog2.show(); 
         Toast.makeText(view.getContext(), "Heure de depart : " + startHour + " minutes de départ : " + startMinute, Toast.LENGTH_LONG).show(); 
        } else { 
         finishHour = hourOfDay; 
         finishMinute = minuteOfDay; 
         Log.d("ça passe la", "FINNNNNNNN"); 
         Toast.makeText(view.getContext(), "Heure de fin : " + finishHour + " minutes de fin : " + finishMinute, Toast.LENGTH_LONG).show(); 

         setHour(pos,startHour,startMinute,finishHour,finishMinute, holderr); 
         reinitHour(); 
        } 
       } 
      }; 

    class ViewHolder2 extends RecyclerView.ViewHolder { 
     TextView title; 
     TextView disponibility; 
     ImageView imageView; 
     Button add; 
     Button modify; 

     public ViewHolder2(View itemView) { 
      super(itemView); 
      title = (TextView) itemView.findViewById(R.id.card_title); 
      disponibility = (TextView) itemView.findViewById(R.id.card_text); 
      imageView = (ImageView) itemView.findViewById(R.id.card_image); 
      add = (Button) itemView.findViewById(R.id.button_add); 
      modify = (Button) itemView.findViewById(R.id.button_modify); 
     } 

     public void setTextCard(int startHour, int startMinute, int finishHour, int finishMinute) { 
      disponibility.setText(Html.fromHtml("Vous êtes disponnible de  <b>" + String.valueOf(startHour) + "h" + String.valueOf(startMinute) +"</b>  à <b> "+ String.valueOf(finishHour)+"h" +String.valueOf(finishMinute)+" </b>")); 
     } 

     public void setDay(String str) { 
      if (title != null) { 
       title.setText(str); 
      } 
     } 

     public void setImage(int position) { 
      if (imageView != null) { 
       imageView.setImageResource(getId(position+1)); 
      } 
     } 

     private int getId(int position) { 
      Context context = imageView.getContext(); 
      int id =  context.getResources().getIdentifier("tennis"+position, "drawable",  context.getPackageName()); 
      return id; 
     } 
    } 

    class ViewHolder0 extends RecyclerView.ViewHolder { 
     TextView textCard; 
     TextView textTitle; 
     ImageView imageView; 
     public ViewHolder0(View itemView){ 
      super(itemView); 
      textCard = (TextView) itemView.findViewById(R.id.card_text); 
      textTitle = (TextView) itemView.findViewById(R.id.card_title); 
      imageView = (ImageView) itemView.findViewById(R.id.card_image); 
     } 

     public void setDay(String str) { 
      if (textTitle != null) { 
       textTitle.setText(str); 
      } 
     } 

     public void setTextCard() { 
      textCard.setText(Html.fromHtml("Vous êtes disponnible de  <b>17h30</b> à <b>18h30</b>")); 
     } 

     public void setImage(int position) { 
      if (imageView != null) { 
       imageView.setImageResource(getId(position + 1)); 
      } 
     } 

     private int getId(int position) { 
      Context context = imageView.getContext(); 
      int id =  context.getResources().getIdentifier("tennis"+position, "drawable",  context.getPackageName()); 
      return id; 
     } 
    }  
} 

agenda_card.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.CardView  xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/card_view" 
android:layout_width="match_parent" 
android:layout_height="@dimen/card_height" 
android:layout_gravity="center" 
android:layout_marginBottom="@dimen/md_keylines" 
android:layout_marginLeft="@dimen/md_keylines" 
android:layout_marginRight="@dimen/md_keylines" 
app:elevation="0dp" 
android:foreground="?attr/selectableItemBackground"> 

<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <ImageView 
     android:id="@+id/card_image" 
     android:layout_width="match_parent" 
     android:layout_height="@dimen/card_image_height" 
     android:scaleType="centerCrop" 
     android:src="@drawable/tennis1" /> 

    <TextView 
     android:id="@+id/card_title" 
     android:layout_width="match_parent" 
     android:layout_height="@dimen/card_title_height" 
     android:text="Lundi" 
     android:textAppearance="@style/TextAppearance.AppCompat.Title" 
     android:textColor="@color/white" 
     android:layout_above="@+id/card_text" 
     android:layout_alignLeft="@+id/card_text" 
     android:layout_alignStart="@+id/card_text" 
     android:layout_marginLeft="5dp" 
     android:gravity="center_vertical" /> 

    <TextView 
     android:id="@+id/card_text" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="16dp" 
     android:text="Vous n'avez pas ajouté de disponibilité" 
     android:ellipsize="end" 
     android:singleLine="true" 
     android:textColor="@color/dark_grey" 
     android:textSize="@dimen/article_subheading" 
     android:layout_below="@+id/card_image" 
     android:layout_centerHorizontal="true" 
     android:gravity="center_horizontal" /> 

    <Button 
     android:id="@+id/button_add" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     style="?android:attr/borderlessButtonStyle" 
     android:textColor="@color/green" 
     android:text="AJOUTER" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 
    </RelativeLayout> 
</android.support.v7.widget.CardView> 

Answer 1

它关系到你绑定和适配器是如何工作的。

就像这个名字已经告诉你的那样，如果原始位置不再显示，你的适配器的视图会被循环显示在另一个位置。但是您的ViewHolder2的代码不会更新视图持有者的所有数据。

ViewHolder2 v2 = (ViewHolder2) holder; 
v2.setDay(days[position]); 
v2.setImage(position); 
Log.d("item : ", String.valueOf(position)); 
v2.add.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     pos = position; 
     holderr = holder; 
     TimePickerDialog timePickerDialog = new TimePickerDialog(context, listener, 0, 0, true); 
     timePickerDialog.show(); 
    } 
}); 

这是缺少呼叫v2.setTextCard()。所以你需要确保设置正确，disponibility。这通常适用于任何视图持有者的所有领域。

尝试使您的适配器多一点。此外，在视图持有者处理更改时，还可以使用update()方法。

作为一个侧面节点，您的onCreateViewHolder()方法可能会更有效一些。目前你每次都在膨胀两个视图，即使你只使用一个视图。

LayoutInflater inflater = LayoutInflater.from(parent.getContext()); 
switch (viewType) { 
    case 0: return new ViewHolder0(inflater.inflate(R.layout.agenda_modify_card, parent, false)); 
    case 1: return new ViewHolder2(inflater.inflate(R.layout.agenda_card, parent, false)); 
    default: return null; 
}