Butterknife不适用于适配器类

Question

我创建了一个基地recyclerview，而我的其他类正在扩展基类。我已经实现了butterknife。但是当其他类扩展基类时，我将视图视为null。

下面是我的基类

public abstract class BaseAdapter<T> 
     extends RecyclerView.Adapter<BaseAdapter.MyViewHolder> { 

    private List<T> mObjects; 
    private Context context; 

    public BaseAdapter(final List<T> objects, Context context) { 
     this.mObjects = objects; 
     this.context = context; 
    } 
    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View itemView = LayoutInflater.from(parent.getContext()) 
       .inflate(getActivityLayout(), parent, false); 
     ButterKnife.bind(this,parent); 
     return new MyViewHolder(itemView); 
    } 
    /** 
    * Adds the specified object at the end of the array. 
    * 
    * @param object The object to add at the end of the array. 
    */ 
    public void add(final T object) { 
     mObjects.add(object); 
     notifyItemInserted(getItemCount() - 1); 
    } 

    /** 
    * Remove all elements from the list. 
    */ 
    public void clear() { 
     final int size = getItemCount(); 
     mObjects.clear(); 
     notifyItemRangeRemoved(0, size); 
    } 

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

    public T getItem(final int position) { 
     return mObjects.get(position); 
    } 

    public long getItemId(final int position) { 
     return position; 
    } 

    /** 
    * Returns the position of the specified item in the array. 
    * 
    * @param item The item to retrieve the position of. 
    * @return The position of the specified item. 
    */ 
    public int getPosition(final T item) { 
     return mObjects.indexOf(item); 
    } 

    /** 
    * Inserts the specified object at the specified index in the array. 
    * 
    * @param object The object to insert into the array. 
    * @param index The index at which the object must be inserted. 
    */ 
    public void insert(final T object, int index) { 
     mObjects.add(index, object); 
     notifyItemInserted(index); 

    } 

    /** 
    * Removes the specified object from the array. 
    * 
    * @param object The object to remove. 
    */ 
    public void remove(T object) { 
     final int position = getPosition(object); 
     mObjects.remove(object); 
     notifyItemRemoved(position); 
    } 

    /** 
    * Sorts the content of this adapter using the specified comparator. 
    * 
    * @param comparator The comparator used to sort the objects contained in this adapter. 
    */ 
    public void sort(Comparator<? super T> comparator) { 
     Collections.sort(mObjects, comparator); 
     notifyItemRangeChanged(0, getItemCount()); 
    } 
    public class MyViewHolder extends RecyclerView.ViewHolder { 

     public MyViewHolder(View view) { 
      super(view); 
     } 
    } 
    protected abstract int getActivityLayout(); 
} 

下面是我的子类

public class SubRecyclerAdapter extends BaseAdapter { 

     private Context context; 
     private List<LocationList> getLocationLists; 
     @Nullable 
     @BindView(R.id.branchimage) 
     ImageView branchimage; 
     public SubRecyclerAdapter(List<LocationList> getLocationLists,Context context) { 
      super(getLocationLists,context); 
      this.context=context; 
      this.getLocationLists=getLocationLists; 
     } 

     @Override 
     protected int getActivityLayout() { 
      return R.layout.locationlist; 
     } 

     @Override 
     public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
      Picasso.with(context) .load(getLocationLists.get(position).getBranch_image()) .placeholder(R.drawable.dummy_image) 
        .error(R.drawable.dummy_image) .into(branchimage); 
//branchimage is null here 
     } 

Butterknife版本： -

compile 'com.jakewharton:butterknife:8.2.1' 
apt 'com.jakewharton:butterknife-compiler:8.2.1' 

Answer 1

如果你想在你的适配器，您需要使用ButterKnife在您的视图持有者和onCreateViewHolder中以这种方式执行此操作：

//View Holder for performance optimizations of the recycler view display 
    static class AddProductsViewHolder extends RecyclerView.ViewHolder{ 

     @InjectView(R.id.product_image) 
     ImageView productImage; 
     @InjectView(R.id.product_name) 
     TextView productName; 
     @InjectView(R.id.product_brand) 
     TextView productBrand; 

     public final View mView; 

     public AddProductsViewHolder(View itemView) { 
      super(itemView); 
      mView = itemView; 
      ButterKnife.inject(this, itemView); 
     } 
    } 

@Override 
    public AddProductsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View productView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_row_products, parent, false); 
     return new AddProductsViewHolder(productView); 
    } 

用法：

@Override 
    public void onBindViewHolder(AddProductsViewHolder holder, int position) { 

     try{ 
      AddProductInfo addProductInfo = addProductInfoList.get(position); 

      if(!addProductInfo.getProductImage().isEmpty()){ 
      holder.productName.setText(addProductInfo.getProductName()); 
      holder.productBrand.setText(addProductInfo.getProductBrand()); 


     } 
     catch (Exception e){ 

     } 
    } 

评论下面，如果您有任何疑问。

随着butterknife的最新版本，你只需要与@Bind
这是我的旧代码替换@InjectView，但我认为它成为你的目的。