Question

我正在尝试扩展BaseAdapter以进行自定义listview。但它说：

在getCount（）方法中
方法调用expected`。

我知道它是一个数组，所以如何获取它？我基本上是这个领域的一个人。这是我尝试申请的代码：

public class customAdapter extends BaseAdapter implements View.OnClickListener {
  private Context context;
  private String[] restaurant;
  private String[] address;
  private String[] time;
  private static LayoutInflater layoutInflater = null;
  public Resources res;
  int image[];
  ListModel tempvalues = null;
  int i=0;
  public customAdapter(MainActivity mainActivity, String[] rest, String[] add,String[] tim,int[] img){
    restaurant = rest;
    context=mainActivity;
    address= add;
    time = tim;
    image = img;
    layoutInflater = (LayoutInflater)context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public int getCount() {
    return restaurant.length(); // Method call expected.
  }

  @Override
  public Object getItem(int position) {
    return position;
  }

  @Override
  public long getItemId(int position) {
    return position;
  }
  public class Holder{
    TextView resname;
    TextView resadd;
    TextView restim;
    ImageView imageView;
  }
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    Holder holder = new Holder();
    View rowview;
    rowview = layoutInflater.inflate(R.layout.custom_list_view_for_restaurant_names,null);
    holder.resname = (TextView)rowview.findViewById(R.id.resnameTextView);
    holder.resadd = (TextView)rowview.findViewById(R.id.address_textview);
    holder.restim = (TextView)rowview.findViewById(R.id.time_textview);
    holder.imageView = (ImageView)rowview.findViewById(R.id.imageView);
    holder.resname.setText(restaurant[position]);
    holder.resadd.setText(address[position]);
    holder.restim.setText(time[position]);
    holder.imageView.setImageResource(image[position]);
    rowview.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });

    return rowview;
  }

  @Override
  public void onClick(View v) {
  }
}

Answer 1

更改

return restaurant.length();

到

return restaurant.length;

餐厅是Array而不是List

还有一件事我想建议你，

不要单独传递这些数组，因为如果某些数组大小小于restaurant数组，那么逻辑上会破坏代码。

我建议你使用模型，

例如：

public class Event {

   private String restaurant;
   private String address;
   private String time;
   private int image;

   //getters and setters

}

并传递Event s

列表

如下所示，

     private List<Event> events;

        public customAdapter(MainActivity mainActivity, List<Event>  events){

            this.events = events;
             layoutInflater = (LayoutInflater)context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
  }


    @Override
      public int getCount() {
        return events.size(); // Method call expected.
      }

      @Override
      public Object getItem(int position) {
        return events.get(position);
      }

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

并访问，

Event event = events.get(position);
 holder.resname.setText(event.getResturant());
    holder.resadd.setText(event.getAddress());
    holder.restim.setText(event.getTime());
    holder.imageView.setImageResource(event.getImage());

而且，

在重复使用已经膨胀的元素时，不应该给ListView元素充气。

       View view = convertView;
       if (view == null) {
            // if it's not recycled, initialize some attributes
            LayoutInflater inflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.custom_list_view_for_restaurant_names,null);
        }

Android BaseAdapter中预期的方法调用

1 个答案: