在 GridLayout 中为所有 Adapter 项目重复相同的数据

Question

在网格布局中，我填充了 46 个数据（名称和图像），但只有前 6 个数据一次又一次地重复。

 public View getView(int position, View convertView, ViewGroup parent) {
      // TODO Auto-generated method stub
      View grid;
      LayoutInflater inflater = (LayoutInflater) mContext
          .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

      if (convertView == null) {

          grid = new View(mContext);
          grid = inflater.inflate(R.layout.grid_item, null);
          TextView textView = (TextView) grid.findViewById(R.id.txtTitle);
          ImageView imageView = (ImageView)grid.findViewById(R.id.imgGrid);
          textView.setText(web[position]);
          imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
         // imageView.setBackgroundResource(web[position]);
          Glide.with(mContext).load(Imageid[position]).into(imageView);
      } else {
          grid = (View) convertView;//setBackground(Imageid[position]);
      }

      return grid;
  }

Answer 1

使用 ViewHolder 初始化网格单元格，如下所示

 public class Viewholder {
        TextView textView;
        ImageView imageView
    }

并像这样更改 getView() 方法

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

        holder = new Viewholder();
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.grid_list_item, null);

       holder.textView = (TextView) convertView.findViewById(R.id.txtTitle);
     holder.imageView = (ImageView)convertView.findViewById(R.id.imgGrid);


        convertView.setTag(holder);

    } else {

        holder = (Viewholder) convertView.getTag();
    }

    holder.textView.setText(web[position]);
      holder.imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
           Glide.with(mContext).load(Imageid[position]).into(holder.imageView);

    return convertView;
}

Answer 2

发生这种情况是因为它在您滚动时被回收。

做这样的事情

public View getView(int position, View convertView, ViewGroup parent) {
  Holder holder;
  LayoutInflater inflater = (LayoutInflater) mContext
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

  if (convertView == null) {

      holder = new Holder();
      convertView = inflater.inflate(R.layout.grid_item, null);
      holder.textView = (TextView) convertView.findViewById(R.id.txtTitle);
      holder.imageView = (ImageView)convertView.findViewById(R.id.imgGrid);
      convertView.setTag(holder);

  } else {
      holder = (Holder) convertView.getTag();
  }
  holder.textView.setText(web[position]);
  holder.imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
  Glide.with(mContext).load(Imageid[position]).into(holder.imageView);
  return grid;
}
class Holder{
   TextView textView;
   ImageView imageView;
}

希望对您有所帮助。

在 GridLayout 中为所有 Adapter 项目重复相同的数据

Repeating same data in GridLayout for all Adapter items

android

grid-layout

android-gridlayout