Question

我想使用水平数字选择器，所以我做了自定义小部件。在适配器中，当我使用自定义窗口小部件的按钮点击和设置计数时，我想更改适配器中的EditText文本。

这是我的自定义组件

HorizontalNumberPicker.java

public class HorizontalNumberPicker extends LinearLayout {

    Button plus;
    Button minus;
    EditText num;
    int count;

    OnCustomEventListener mListener;

    public HorizontalNumberPicker(Context context, AttributeSet attrs) {
        super(context, attrs);

        LayoutInflater layoutInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        layoutInflater.inflate(R.layout.horizontal_number_picker, this);

        plus = (Button) findViewById(R.id.btn_plus);
        minus = (Button) findViewById(R.id.btn_minus);
        num = (EditText) findViewById(R.id.edit_text);

        plus.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (num.getText().toString().equals("10")) {
                    if (mListener != null)
                        mListener.onEvent(count);
                    return;
                } else {
                    count = Integer.parseInt(num.getText().toString()) + 1;
                    num.setText(String.valueOf(count));
                    if (mListener != null)
                        mListener.onEvent(count);
                }
            }
        });

        minus.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (num.getText().toString().equals("0")) {
                    if (mListener != null)
                        mListener.onEvent(count);
                    return;
                } else {
                    count = Integer.parseInt(num.getText().toString()) - 1;
                    num.setText(String.valueOf(count));
                    if (mListener != null)
                        mListener.onEvent(count);

                }
            }
        });
    }

    public interface OnCustomEventListener {
        public abstract void onEvent(int count);
    }

    public void setCustomEventListener(OnCustomEventListener eventListener) {
        mListener = eventListener;
    }

}

这是我的自定义适配器

private Context context;
LayoutInflater inflater;
View itemView;

ArrayList<MenuItemData> list;

// Declare Variables
NetworkImageView iv_menu_img = null;
TextView tv_menu_name = null;
TextView tv_menu_price = null;

// Progress dialog
private ProgressDialog pDialog;
int price;

//imageloader using volley
ImageLoader mImageLoader;

HorizontalNumberPicker pick_menu_grid;


public MenuListGridAdapter(Context context, ArrayList<MenuItemData> list, ProgressDialog pDialog) {
    this.context = context;
    this.list = new ArrayList<MenuItemData>();
    this.list.addAll(list);
    this.pDialog = pDialog;
    //image loader
    mImageLoader = AppController.getInstance().getImageLoader();
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        itemView = inflater.inflate(R.layout.menulist_grid_item, parent, false);

        iv_menu_img = (NetworkImageView) itemView.findViewById(R.id.iv_menu_img);
        tv_menu_name = (TextView) itemView.findViewById(R.id.tv_menu_name);
        tv_menu_price = (TextView) itemView.findViewById(R.id.tv_menu_price);
        pick_menu_grid = (HorizontalNumberPicker)itemView.findViewById(R.id.pick_menu_grid);
    } else {
        itemView = (View) convertView;
    }

    // Set the result into ImageView
    iv_menu_img.setImageUrl(url + list.get(position).getImageFilePathIndex(), mImageLoader);

    // Set the results into TextViews
    tv_menu_name.setText(list.get(position).getMenuCHNName());
    tv_menu_price.setText(list.get(position).getMenuPrice());

    //set price to listener
    if(list.get(position).getMenuPrice().equals("")){
        price = 0;
    }
    pick_menu_grid.setCustomEventListener(new HorizontalNumberPicker.OnCustomEventListener() {
        @Override
        public void onEvent(int count) {
            list.get(position).setCount(count);
            price = Integer.parseInt(list.get(position).getMenuPrice());
            tv_menu_price.setText(String.valueOf(price*count));
            notifyDataSetChanged();
        }
    });
    pDialog.dismiss();
    return itemView;
}

点击HorizontalNumberPicker按钮后 - ＆gt;计数正在变化（ArrayList中的价格） - ＆gt; tv_menu_price.setText(String.valueOf(price*count)); - ＆gt; EditText(tv_menu_price)正在改变（在适配器中）。

我不知道在哪里可以添加或编辑此代码。只是它没有用。我该怎么办？

Answer 1

它不起作用，因为您必须在dataSet中设置要更改的所有数据，并将数据设置为text.setText（dataSet.get（i）blabla）等文本。所以在你的主要活动中，你喜欢这样：adapter.getData（）。set（i）.blabla，然后在对dataSet进行更改后调用mAdapter.notifyDataSetChanged（）。

当我点击按钮时，我想在适配器

1 个答案: