android - fragment 中的 ListView 使用 ArrayAdapter 未设置

Question

我想在 Fragment 中使用 ArrayAdapter 设置 Listview。这是我的所有代码。

fragment::

public class HairstylesFragment extends Fragment {
    ListView HairStylelz;
    Integer[] imageId = {
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz,
            R.drawable.man_menu_buzz
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_hairstyles, container, false);
        HairStylelz=(ListView)view.findViewById(R.id.Listview_HairStyle);

        HairStylez_Adapter  adapter = new HairStylez_Adapter(view.getContext(),imageId);
        HairStylelz.setAdapter(adapter);

        return view;
    }
}

数组适配器::

public class HairStylez_Adapter extends ArrayAdapter<String> {

     Integer[] imageId;
    Context context;



    public HairStylez_Adapter(Context context, Integer[] imageId) {
        super(context, R.layout.listview_adapter_hairstyle);
        this.context=context;
        this.imageId=imageId;

    }


    @Override
    public View getView(int position, View view, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView= inflater.inflate(R.layout.listview_adapter_hairstyle, null, true);
        ImageView imageView = (ImageView) rowView.findViewById(R.id.Hairstyle_imageview);
        imageView.setImageResource(imageId[position]);

        Log.d("settingup","");
        return rowView;
    }
}

但 Listview 没有设置其显示空白屏幕。我的代码中有任何遗漏吗？帮助在 fragment 中设置 ListView

谢谢

Answer 1

根据您的用例，我建议您使用 BaseAdapter 并覆盖 getCount()、getItemId(int position) 和 getItem(int position) 方法并返回 imageId.length、0 和 imageId[position]。下面是 BaseAdapter 的示例实现。

public class CustomBaseAdapter extends BaseAdapter {
        Integer[] imageId;
        Context context;
         
        public CustomBaseAdapter(Context context, Integer[] imageId) {
            this.context=context;
            this.imageId=imageId;
        }

        @Override
        public View getView(int position, View view, ViewGroup parent) {

            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            View rowView= inflater.inflate(R.layout.listview_adapter_hairstyle, null, true);
            ImageView imageView = (ImageView) rowView.findViewById(R.id.Hairstyle_imageview);
            imageView.setImageResource(getItem(position));

            Log.d("settingup","");
            return rowView;
        }

        @Override
        public int getCount() {     
            return imageId.length;
        }

        @Override
        public Integer getItem(int position) {
            return imageId[position];
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }
}