Java 超类型Kotlin的直接参数不允许使用投影

我将一个Java类转换为kotlin，并得到了上面提到的错误预测，对于超类型的直接参数是不允许的

Java类是

public class RecipeViewHolder extends ParentViewHolder {

    private static final float INITIAL_POSITION = 0.0f;
    private static final float ROTATED_POSITION = 180f;

    @NonNull
    private final ImageView mArrowExpandImageView;
    private TextView mRecipeTextView;
    private TextView position;
    private TextView total;

    public RecipeViewHolder(@NonNull View itemView) {
        super(itemView);
        mRecipeTextView = (TextView) itemView.findViewById(R.id.recipe_textview);
        position = (TextView) itemView.findViewById(R.id.textViewPosition);
        total = (TextView) itemView.findViewById(R.id.textViewTotal);

        mArrowExpandImageView = (ImageView) itemView.findViewById(R.id.arrow_expand_imageview);
    }

    public void bind(@NonNull Recipe recipe) {
        mRecipeTextView.setText(recipe.getName());

        try {

            position.setText("Position: " + recipe.getJson().getString("position"));
            total.setText("Total Bid Amount: " + recipe.getJson().getString("type"));

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

}

转换后的Kotlin类为

//Error occurs here in Parentvireholder<*,*>

class RecipeViewHolder(itemView: View) : ParentViewHolder<*, *>(itemView) {

    private val mArrowExpandImageView: ImageView
    private val mRecipeTextView: TextView
    private val position: TextView
    private val total: TextView

    init {

        mRecipeTextView = itemView.findViewById<View>(R.id.recipe_textview) as TextView
        position = itemView.findViewById<View>(R.id.textViewPosition) as TextView
        total = itemView.findViewById<View>(R.id.textViewTotal) as TextView

        mArrowExpandImageView = itemView.findViewById<View>(R.id.arrow_expand_imageview) as ImageView

    }

    fun bind(recipe: Recipe) {

        mRecipeTextView.text = recipe.name

        try {

            position.text = "Position: " + recipe.json!!.getString("position")
            total.text = "Total Bid Amount: " + recipe.json!!.getString("type")

        } catch (e: JSONException) {
            e.printStackTrace()
        }

    }

}

//Parentvireholder中出现错误
类RecipeViewHolder（itemView:View）：ParentViewHolder（itemView）{
private val mArrowExpandImageView:ImageView
private val mRecipeTextView:TextView
私有val位置：TextView
私有val总计：TextView
初始化{
mRecipeTextView=itemView.findViewById（R.id.recipe\u textview）作为textview
position=itemView.findViewById（R.id.textViewPosition）作为TextView
total=itemView.findViewById（R.id.textViewTotal）作为TextView
mArrowExpandImageView=itemView.findviewbyd（R.id.arrow\u expand\u imageview）作为imageview
}
趣味绑定（配方：配方）{
mRecipeTextView.text=recipe.name
试一试{
position.text=“position:”+recipe.json！！.getString（“position”）
total.text=“总投标金额：”+recipe.json！！.getString（“类型”）
}捕获（e:JSONException）{
e、 printStackTrace（）
}
}
}

---

显示的注释中出现错误。我尝试了Any修复程序，但显示类型参数不在其范围内

Kotlin要求您指定超类的泛型参数

您需要用显式类型替换超类泛型类型中的

*

，或者为子类指定泛型类型

如果超类泛型类型被限制为特定类型，则不能使用

Any

。查看ParentViewHolder的类定义，并声明与之相同的类型：

RecipeViewHolder（itemView:View）：ParentViewHolder

或

---

RecipeViewHolder（itemView:View）：ParentViewHolder

请提供一个

ParentViewHolder

的定义。最常用的方法是以相同的方式使类泛型：RecipeViewHolder或者，如果知道父类型和子类型，则可以在扩展超类时显式指定它们，例如：RecipeViewHolder:ParentViewHolder