casting - 无法将图像视图添加到自定义适配器以显示到网格视图中，它在 setimageresource 上给出类转换异常

Question

                  package com.ettv.tv.forealz;

               import android.content.Context;
               import android.util.Log;
               import android.view.LayoutInflater;
                  import android.view.View;
               import android.view.ViewGroup;
               import android.widget.BaseAdapter;
               import android.widget.ImageView;
                import android.widget.TextView;
               import android.widget.Toast;

                import androidx.leanback.widget.ArrayObjectAdapter;
                 import androidx.leanback.widget.HeaderItem;
                   import androidx.leanback.widget.ListRow;

                   import com.ettv.tv.R;
                    `import com.ettv.tv.forealz.model.ModelStore;
                    `import com.ettv.tv.forealz.model.Topic;
                      import com.squareup.picasso.Picasso;

               import java.util.ArrayList;
              import java.util.List;

                  `import static com.ettv.tv.MovieList.list;

// 它是自定义适配器 `public class CustomAdapter2 extends BaseAdapter {

` @Override public int getCount() { return topics3.size(); }

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

                 @Override
                 public long getItemId(int position) {

`返回位置；}

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

    if (convertView == null) {

        convertView = thisInflater.inflate( R.layout.row_item, parent, 
   false );
        //TextView textHeading = (TextView) 
         convertView.findViewById(R.id.petnames);
        ImageView thumbnailImage = (ImageView) 
                convertView.findViewById(R.id.image);




        final List list = new ArrayList<Integer>();

        for (Topic topic : topics3) {



      thumbnailImage.setImageResource(topics3.get(position).getmDrawable());
        }

}

}




                  return convertView;
}

私人列表主题3； 私有 LayoutInflater thisInflater;

               public CustomAdapter2(Context con, List<Topic> topics2) {

` this.thisInflater = LayoutInflater.from(con);

this.topics3=topics2;

    Log.d("check7",this.topics3.toString());
 Log.d("check8", String.valueOf(topics2.size()));



}

}

}

标签： casting