Android CustomAdapter-变量必须提供维度表达式或数组

我正在根据创建自定义ArrayAdapter，但在这一行中出现错误：

Drawer\u data[]=新抽屉[]{

该

变量必须提供维度表达式或数组

Drawer.java

public class Drawer {
    public int mIcon;
    public String mText;

    public Drawer() {
        super();
    }

    public Drawer(int mIcon, String mTitle) {
        super();
        this.mIcon = mIcon;
        this.mText = mTitle;
    }
}

public class DrawerAdapter extends ArrayAdapter<Drawer> {

    Context context;
    int layoutResourceId;
    Drawer data[] = null;

    public Drawer_CustomAdapter(Context context, int layoutResourceId, Drawer[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        DrawerHolder holder = null;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) ((Activity)context).getLayoutInflater();

            convertView = inflater.inflate(layoutResourceId, parent, false);
            holder = new DrawerHolder();
            holder.mIcon = (ImageView) convertView.findViewById(R.id.drawer_icon);
            holder.mText = (TextView) convertView.findViewById(R.id.drawer_text);
            convertView.setTag(holder);
        } else {
            holder = (DrawerHolder) convertView.getTag();
        }

        Drawer drawer = data[position];
        holder.mIcon.setImageResource(drawer.mIcon);
        holder.mText.setText(drawer.mText);

        return convertView;
    }

    static class DrawerHolder {
        ImageView mIcon;
        TextView mText;
    }
}

draweradopter.java

public class Drawer {
    public int mIcon;
    public String mText;

    public Drawer() {
        super();
    }

    public Drawer(int mIcon, String mTitle) {
        super();
        this.mIcon = mIcon;
        this.mText = mTitle;
    }
}

public class DrawerAdapter extends ArrayAdapter<Drawer> {

    Context context;
    int layoutResourceId;
    Drawer data[] = null;

    public Drawer_CustomAdapter(Context context, int layoutResourceId, Drawer[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        DrawerHolder holder = null;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) ((Activity)context).getLayoutInflater();

            convertView = inflater.inflate(layoutResourceId, parent, false);
            holder = new DrawerHolder();
            holder.mIcon = (ImageView) convertView.findViewById(R.id.drawer_icon);
            holder.mText = (TextView) convertView.findViewById(R.id.drawer_text);
            convertView.setTag(holder);
        } else {
            holder = (DrawerHolder) convertView.getTag();
        }

        Drawer drawer = data[position];
        holder.mIcon.setImageResource(drawer.mIcon);
        holder.mText.setText(drawer.mText);

        return convertView;
    }

    static class DrawerHolder {
        ImageView mIcon;
        TextView mText;
    }
}

编辑：第42行是-

holder.mIcon.setImageResource（drawer.mIcon）；

编辑2:

在哪里添加这些setter和getter方法？哪个.java文件

我在哪里调用

抽屉.getIcon（）

---

这样试试看

    Drawer drawer_data[] = new Drawer[] { // <<<< ERROR
            for(int i=0; i<mDrawerItems; i++) {
                new Drawer(mDrawerIcons[i],mDrawerItems[i]);
            }
    };

    DrawerAdaper adapter = new DrawerAdapter(this,R.layout.drawer_list_item,drawer_data);

    mDrawerList.setAdapter(adapter);

Drawer drawer_data[] = new Drawer[mDrawerItems.length]

             for(int i=0; i<mDrawerItems.length; i++) {
                drawer_data[]=new Drawer(mDrawerIcons[i],mDrawerItems[i]);
            }


    DrawerAdaper adapter = new DrawerAdapter(this,R.layout.drawer_list_item,drawer_data);

    mDrawerList.setAdapter(adapter);

Drawer\u data[]=新抽屉[mDrawerItems.length]
对于（inti=0；iTry

Drawer-Drawer_-data[]=新抽屉[mDrawerItems.size（）]；
对于（int i=0；i
试试这个
Drawer-Drawer\u data[]=new-Drawer[mDrawerItems.size（）]
这解决了这个错误。但是当我运行应用程序时，它在运行时崩溃了：错误：Drawer\u CustomAdapter.java行42:holder.mIcon.setImageResource（Drawer.mIcon）

有什么想法吗？发表在上面的主要帖子中。在抽屉类中使用setter和getter。然后调用

drawer.getIcon（）

我怎么做？对不起，我还是初学者…：（已尝试。错误已解决，但应用程序在运行时崩溃。错误：NullPOinter：请参阅上面问题的注释。已尝试。相同的错误。我认为需要使用

setter

和

getter

方法。尝试登录以确定holder.mIcon是否为null或drawer.mIcon是否为null。您告诉的上述答案解决了此问题。以下代码r Drawer类位于上面的主帖子中，以粗体显示为“Drawer”。您设置了mDrawerIcons的值吗？也就是说，mDrawerIcons[i]不是空的，对吗？

Drawer drawer_data[] = new Drawer[mDrawerItems.size()];
for(int i = 0; i < mDrawerItems.size(); i++){
drawer_data[i] = new Drawer(mDrawerIcons[i],mDrawerItems[i]);
}