单击其中一个recyclerview项目的按钮时，其他recyclerview按钮也会影响

Question

当我在recyclerview项目中单击它时正在更改按钮的图标，但其他按钮的图标已更改。 并不是所有的图标都会影响，但有些会变得有效。 我不知道如何检测到这一点。

公共类MainActivity延伸AppCompatActivity {

private RecyclerView Items; 
    private ItemListAdapter ItemAdapter; 
    private ArrayList<ItemDataModel> ItemList; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     try{setContentView(R.layout.activity_main); 

     ItemList = new ArrayList<ItemDataModel>(); 
     ItemList.add(new ItemDataModel("Data1", 1.00)); 
     ItemList.add(new ItemDataModel("Data2", 2.00)); 
     ItemList.add(new ItemDataModel("Data3", 3.00)); 
     ItemList.add(new ItemDataModel("Data4", 4.00)); 
     ItemList.add(new ItemDataModel("Data5", 5.00)); 
     ItemList.add(new ItemDataModel("Data6", 6.00)); 
     ItemList.add(new ItemDataModel("Data7", 7.00)); 
     ItemList.add(new ItemDataModel("Data8", 8.00)); 
     ItemList.add(new ItemDataModel("Data9", 9.00)); 
     ItemList.add(new ItemDataModel("Data10", 10.00)); 
     ItemList.add(new ItemDataModel("Data11", 11.00)); 
     ItemList.add(new ItemDataModel("Data12", 12.00)); 
     ItemList.add(new ItemDataModel("Data13", 13.00)); 
     ItemList.add(new ItemDataModel("Data14", 14.00)); 
     ItemList.add(new ItemDataModel("Data15", 15.00)); 
     ItemList.add(new ItemDataModel("Data16", 16.00)); 
     ItemList.add(new ItemDataModel("Data17", 17.00)); 
     ItemList.add(new ItemDataModel("Data18", 18.00)); 
     ItemList.add(new ItemDataModel("Data19", 19.00)); 
     ItemList.add(new ItemDataModel("Data20", 20.00)); 

     ItemAdapter = new ItemListAdapter(ItemList); 

     Items = (RecyclerView) findViewById(R.id.Main_List); 
     Items.setLayoutManager(new LinearLayoutManager(MainActivity.this)); 
     Items.setAdapter(ItemAdapter);} 
     catch (Exception e) 
     { 
     e.printStackTrace(); 
     }} 
class ItemDataModel{ 
    public String Desc; 
    public double sPrice; 
    public ItemDataModel(String De, double sp){ 
     Desc = De; 
     sPrice = sp; 
    } 
} 
class ItemHolder extends RecyclerView.ViewHolder { 
    public TextView Desc, Update; 
    public EditText Prices; 

    public ItemHolder(View view) { 
     super(view); 
     Desc = (TextView) view.findViewById(R.id.ListRow_Desc); 
     Prices = (EditText) view.findViewById(R.id.ListRow_Price); 
     Update = (TextView) view.findViewById(R.id.ListRow_Update); 
    } 
} 
class ItemListAdapter extends RecyclerView.Adapter<ItemHolder> { 
    private ArrayList<ItemDataModel> arrayList; 

    public ItemListAdapter(ArrayList<ItemDataModel> arrayList) { 
     this.arrayList = arrayList; 
    } 

    @Override 
    public int getItemCount() { 
     return (arrayList != null ? arrayList.size() : 0); 
    } 

    @Override 
    public void onBindViewHolder(ItemHolder holder, final int position) { 
     final ItemDataModel model = arrayList.get(position); 
     final ItemHolder mainHolder = (ItemHolder) holder; 

     mainHolder.Desc.setText(model.Desc); 
     mainHolder.Prices.setText(String.format("%1$.2f", model.sPrice)); 
     mainHolder.Update.setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 
         if (mainHolder.Prices.isEnabled()) { 
          mainHolder.Prices.setEnabled(false); 
          mainHolder.Prices.clearFocus(); 
          model.sPrice = Double.valueOf(mainHolder.Prices.getText().toString()); 
          mainHolder.Prices.setText(String.format("%1$.2f", model.sPrice)); 
          mainHolder.Update.setCompoundDrawablesWithIntrinsicBounds(R.drawable.profile, 0, 0, 0); 
         } else 
         { 
          mainHolder.Prices.setEnabled(true); 
          mainHolder.Prices.requestFocus(); 
          mainHolder.Update.setCompoundDrawablesWithIntrinsicBounds(R.drawable.checked,0,0,0); 
         } 
        } 
       } 
     ); 
    } 

    @Override 
    public ItemHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) { 
     LayoutInflater mInflater = LayoutInflater.from(viewGroup.getContext()); 

     ViewGroup mainGroup = (ViewGroup) mInflater.inflate(R.layout.list_row, viewGroup, false); 
     ItemHolder mainHolder = new ItemHolder(mainGroup); 
     return mainHolder; 
    } 
} 
class ProdCatSubDataModel implements Parcelable { 
    public String Name; 
    public int ID; 

    public ProdCatSubDataModel(Parcel source){ 
     Name = source.readString(); 
     ID = source.readInt(); 
    } 

    public ProdCatSubDataModel(){} 

    public int describeContents(){ 
     return this.hashCode(); 
    } 

    public void writeToParcel(Parcel dest, int flags){ 
     dest.writeString(Name); 
     dest.writeInt(ID); 
    } 

    public final Parcelable.Creator CREATOR = new Parcelable.Creator(){ 
     public ProdCatSubDataModel createFromParcel(Parcel in){ 
      return new ProdCatSubDataModel(in); 
     } 
     public ProdCatSubDataModel[] newArray(int size){return new ProdCatSubDataModel[size];} 
    }; 
} 

}

活动

<RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginLeft = "5dp" 
    android:layout_marginRight="5dp"> 
    <android.support.v7.widget.RecyclerView android:id="@+id/Main_List" 
     android:layout_width="match_parent" android:layout_height="match_parent" 
     android:visibility="visible"/> 

</RelativeLayout> 

项目行

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.CardView android:id="@+id/List_RowLayout" 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="fill_parent" android:layout_height="wrap_content" 
    app:cardPreventCornerOverlap="false" app:cardElevation="3dp" 
    app:cardUseCompatPadding="true" > 

    <RelativeLayout android:layout_width ="fill_parent" android:layout_height="wrap_content" 
     android:padding="5dp" > 



     <TextView android:id="@+id/ListRow_Desc" 
      android:layout_width="fill_parent" android:layout_height="52dp" 
      android:textSize="12dp" 
      android:text="Sample" /> 

     <EditText android:id="@+id/ListRow_Price" android:layout_width="wrap_content" 
      android:layout_height="wrap_content" android:gravity="bottom" 
      android:textSize= "15dp" android:enabled="false" 
      android:text="9999" 
      android:layout_toLeftOf="@+id/ListRow_Update" android:layout_below="@+id/ListRow_Desc" 
      android:layout_marginRight="10dp" android:inputType="numberDecimal"/> 

     <TextView android:id="@+id/ListRow_Update" 
      android:layout_alignParentRight="true" android:layout_below="@+id/ListRow_Desc" 
      android:layout_width="wrap_content" android:layout_height="wrap_content" 
      android:drawableLeft="@drawable/profile" 
      android:layout_marginRight="10dp"/> 
    </RelativeLayout> 

</android.support.v7.widget.CardView> 

Answer 1

这是因为视图回收。您可以在ItemDataModel的内部添加一个字段以保存按钮的状态并恢复onBindViewHolder中的按钮状态。像这样：

class ItemDataModel{ 
    public String Desc; 
    public double sPrice; 
    public boolean clicked = false; 
    public ItemDataModel(String De, double sp){ 
     Desc = De; 
     sPrice = sp; 
    } 
    } 



@Override 
    public void onBindViewHolder(ItemHolder holder, final int position) { 
    final ItemDataModel model = arrayList.get(position); 
    if(model.clicked){ 
     //Set the state of the button when is clicked 
    }else{ 
     //Set initial state 
    } 
    new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 
         model.clicked = true; 

       }); 
    }