在ListView Android Studio中显示表格内容

Question

我在listview中显示表内容时遇到了一些问题。

我有这个方法：

public ArrayList<category> getAllCategories()
{
    ArrayList<category> categories = new ArrayList<category>();

    String selectQuery = "SELECT * FROM " + category.TABLE;

    Log.e("DBHelper",selectQuery);

    SQLiteDatabase db = dbHelper.getReadableDatabase();

    Cursor c = db.rawQuery(selectQuery,null);


    if(c.moveToFirst())
    {
        do{
            category cat = new category();
            cat.set_id(c.getInt(c.getColumnIndex(category.KEY_ID)));
            cat.set_category_name(c.getString(c.getColumnIndex(category.KEY_CATEGORY_NAME)));
            categories.add(cat);
        } while(c.moveToNext());
    }

    return categories;

}

我想在mainactivity.java中调用此方法并在listview中查看结果，但我不知道为什么此代码不起作用：

    categoryRepo categoryRepo = new categoryRepo(this);
    ArrayAdapter<String> adapter;
    ListView list;
    list = (ListView) findViewById(R.id.listView1);

    ArrayList<category> categories = categoryRepo.getAllCategories();

    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice,categories); // --here I get an error, cannot resolve constructor

    list.setAdapter(adapter);