自定义数组超级方法不接受该列表。

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英文:

Custom array super method not accepting the list

问题

我创建了一个自定义的列表适配器,有两个构造函数,分别传递了两个不同的列表给构造函数的super方法。一个super方法接受列表,另一个super方法不接受列表,我得到了一个红色波浪线。悬停在上面没有解释任何内容,错误图像快照已附上。

列表适配器代码:

public class ListAdapter extends ArrayAdapter<Cats> {
    
    // 列表中的值,类型为PlantTags的列表
    List<PlantTags> tags;
    List<Cats> categories;

    boolean childFragment;
    int categoryId;

    // 上下文
    Context context;

    // 列表项的布局资源文件
    int resource;

    // 初始化值的构造函数
    public ListAdapter(Context context, int resource, List<PlantTags> tags, boolean childFragment) {
        super(context, resource, tags);
        this.context = context;
        this.resource = resource;
        this.childFragment = childFragment;
        this.tags = tags;
    }

    // 初始化值的构造函数
    public ListAdapter(Context context, int resource, List<Cats> cats, boolean childFragment, int categoryId) {
        super(context, resource, cats);
        this.context = context;
        this.resource = resource;
        this.childFragment = childFragment;
        this.categories = cats;
        this.categoryId = categoryId;
    }

    // 返回ListView项作为View
    @NonNull
    @Override
    public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        // 我们需要获取列表项的xml视图
        // 为此,我们需要一个LayoutInflater
        LayoutInflater layoutInflater = LayoutInflater.from(context);

        // 获取视图
        View view = layoutInflater.inflate(resource, null, false);

        // 从视图中获取列表项的视图元素
        ImageView imageView = view.findViewById(R.id.imageView);
        TextView textViewName = view.findViewById(R.id.category_name);

        if (!childFragment) {
            // 获取指定位置的Cats对象
            Cats hero = categories.get(position);
            // 将值添加到列表项
            textViewName.setText(hero.getTitle());

        } else {
            // 获取指定位置的PlantTags对象
            PlantTags tag = tags.get(position);
            // 将值添加到列表项
            if (tag.getCategoryId() == categoryId) {
                textViewName.setText(tag.getTitle());
            }
        }

        return view;
    }
}

PlantTags的POJO模型:

public class PlantTags {

    @Expose
    @SerializedName("Title")
    private String Title;
    @Expose
    @SerializedName("CategoryId")
    private int CategoryId;
    @Expose
    @SerializedName("Id")
    private int Id;
    @Expose
    @SerializedName("$id")
    private String $id;

    public String getTitle() {
        return Title;
    }

    public void setTitle(String Title) {
        this.Title = Title;
    }

    public int getCategoryId() {
        return CategoryId;
    }

    public void setCategoryId(int CategoryId) {
        this.CategoryId = CategoryId;
    }

    public int getId() {
        return Id;
    }

    public void setId(int Id) {
        this.Id = Id;
    }

    public String get$id() {
        return $id;
    }

    public void set$id(String $id) {
        this.$id = $id;
    }
}

错误:
自定义数组超级方法不接受该列表。

有人可以解释问题出在哪里吗?
1: https://i.stack.imgur.com/B2Y4W.png

英文:

I have created a custom list adapter, i have two constructors, passing two different lists to super methods of constructor. One super method taking list, the other super method doesn't take the list, i am getting swiggly red line. Hovering on it doesn't explain anything, error image snapshot is attached.

List adapter code

public class ListAdapter extends ArrayAdapter&lt;Cats&gt; {
//the list values in the List of type hero
List&lt;PlantTags&gt; tags;
List&lt;Cats&gt; categories;
boolean childFragment;
int categoryId;
//activity context
Context context;
//the layout resource file for the list items
int resource;
//constructor initializing the values
public ListAdapter(Context context, int resource, List&lt;PlantTags&gt; tags, boolean childFragment) {
super(context, resource, tags);
this.context = context;
this.resource = resource;
this.childFragment = childFragment;
this.tags = tags;
}
//constructor initializing the values
public ListAdapter(Context context, int resource, List&lt;Cats&gt; cats, boolean childFragment, int categoryId) {
super(context, resource, cats);
this.context = context;
this.resource = resource;
this.childFragment = childFragment;
this.categories = cats;
this.categoryId = categoryId;
}
//this will return the ListView Item as a View
@NonNull
@Override
public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {
//we need to get the view of the xml for our list item
//And for this we need a layoutinflater
LayoutInflater layoutInflater = LayoutInflater.from(context);
//getting the view
View view = layoutInflater.inflate(resource, null, false);
//getting the view elements of the list from the view
ImageView imageView = view.findViewById(R.id.imageView);
TextView textViewName = view.findViewById(R.id.category_name);
if (!childFragment) {
//getting the hero of the specified position
Cats hero = categories.get(position);
//adding values to the list item
textViewName.setText(hero.getTitle());
} else {
//getting the hero of the specified position
PlantTags tag = tags.get(position);
//adding values to the list item
if (tag.getCategoryId() == categoryId) {
textViewName.setText(tag.getTitle());
}
}
return view;
}
}

** Pojo model for PlantTags **

public class PlantTags {
@Expose
@SerializedName(&quot;Title&quot;)
private String Title;
@Expose
@SerializedName(&quot;CategoryId&quot;)
private int CategoryId;
@Expose
@SerializedName(&quot;Id&quot;)
private int Id;
@Expose
@SerializedName(&quot;$id&quot;)
private String $id;
public String getTitle() {
return Title;
}
public void setTitle(String Title) {
this.Title = Title;
}
public int getCategoryId() {
return CategoryId;
}
public void setCategoryId(int CategoryId) {
this.CategoryId = CategoryId;
}
public int getId() {
return Id;
}
public void setId(int Id) {
this.Id = Id;
}
public String get$id() {
return $id;
}
public void set$id(String $id) {
this.$id = $id;
}
}

error
自定义数组超级方法不接受该列表。

can anyone explain where the problem is?

答案1

得分: 1

你的超类构造函数必须接受四个或五个参数之一:

public ListAdapter(Context context, int resource, List<PlantTags> tags, boolean childFragment)

或者

public ListAdapter(Context context, int resource, List<Cats> cats, boolean childFragment, int categoryId)

你需要填充所有四到五个参数,或者创建一个带有较少参数的新构造函数。

super(context, resource, tags)

永远不会起作用,因为你试图调用的构造函数(带有三个参数的那个)不存在。

英文:

Your superclass constructor has to take either four or five parameters being:

public ListAdapter(Context context, int resource, List&lt;PlantTags&gt; tags, boolean childFragment)

or

public ListAdapter(Context context, int resource, List&lt;Cats&gt; cats, boolean childFragment, int categoryId)

You need to fill all four-five parameters or create a new constructor with less.

super(context, resource, tags)

Will never work since the constructor that you are trying to call (one with three parameters) does not exist.

答案2

得分: 0

简单的ArrayAdapter据我所知不能接受两个列表。我选择了RecycleView适配器,并且替换了适配器,现在我可以在RecycleView的构造函数中传递任意多的列表。关于这方面有很多代码可用。因此,在这里只是提供一个备选方案。

英文:

Simple ArrayAdapter does not accept two lists as far as i know. I have opted for RecycleView adapter and replaced adapter and i can now pass as many lists as i want in the constructor of recycleview. There are many code available for that. So just suggestion an alternate solution here.

huangapple
  • 本文由 发表于 2020年9月16日 07:19:06
  • 转载请务必保留本文链接:https://go.coder-hub.com/63911072.html
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