不能从静态上下文中引用非静态字段

Question

我有一个 class 是静态的，带有一些属性，class 是静态的，但我得到的错误是字段不是静态的。

我想不出解决办法，我看到的例子看起来很相似。视图持有者始终在适配器内部，如 static 或 public static

这是我的 ArrayAdapter：

public class NoteAdapter extends ArrayAdapter<Note> {

public static class ViewHolder{
    TextView noteTitle;
    TextView noteBody;
    ImageView noteIcon;
}

public NoteAdapter(Context context, ArrayList<Note> notes) {
    super(context, 0, notes);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    Note note = getItem(position);
    ViewHolder viewHolder;

    if (convertView == null) {
        viewHolder = new ViewHolder();
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_row, parent, false);

        // == Here I am getting the error == 
        ViewHolder.noteTitle = (TextView) convertView.findViewById(R.id.text_item_note_title);
        ViewHolder.noteBody = (TextView) convertView.findViewById(R.id.text_item_note_body);
        ViewHolder.noteIcon = (ImageView) convertView.findViewById(R.id.image_item_note);

        convertView.setTag(viewHolder);
    }

    return convertView;
}

}

这是我的笔记模型：

public class Note {
    private String title, message;
    private long noteId, dateCreateMilli;
    private Category category;

    public enum Category {PERSONAL, TECHNICAL, QUOTE, FINANCE}

    public Note(String title, String message, Category category) {
        this.title = title;
        this.message = message;
        this.category = category;
        this.noteId = 0;
        this.dateCreateMilli = 0;
    }

    public Note(String title, String message, Category category, long noteId, long dateCreateMilli) {
        this.title = title;
        this.message = message;
        this.category = category;
        this.noteId = noteId;
        this.dateCreateMilli = dateCreateMilli;
    }

    public String getTitle() {
        return this.title;
    }

    public String getMessage() {
        return this.message;
    }

    public long getNoteId() {
        return this.noteId;
    }

    public long getDateCreateMilli() {
        return this.dateCreateMilli;
    }

    public Category getCategory() {
        return this.category;
    }

    public TextDrawable getIconResource() {
        return TextDrawable.builder().buildRound("P", android.R.color.darker_gray);
    }
}

非常感谢您的帮助。提前致谢。

Answer 1

    ViewHolder.noteTitle = (TextView) convertView.findViewById(R.id.text_item_note_title);
    ViewHolder.noteBody = (TextView) convertView.findViewById(R.id.text_item_note_body);
    ViewHolder.noteIcon = (ImageView) convertView.findViewById(R.id.image_item_note);

ViewHolder 是 class 的名称。该实例名为 viewHolder（首字母小写）。字段 noteTitle 等是实例成员，必须通过对实例的引用来引用（即 viewHolder）。

不能从静态上下文中引用非静态字段

Non-static field cannot be referenced from a static context

java

android

android-arrayadapter

android-viewholder