Question

当我在recyclerview项目中点击它时，我正在更改按钮的图标，但其他按钮的图标会发生变化。并非所有的图标都有效，但有些图标会受到影响。我不知道如何检测到这一点。

公共类MainActivity扩展了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内添加一个字段以保存按钮的状态并恢复onBindViewHolder内的按钮状态。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;

                });
    }

点击一个recyclerview项目的按钮，其他的recyclerview按钮也会影响

1 个答案: