我创建了一个产品列表，这些产品在我创建的 CustomListAdaptor 中正确填充，但在我运行应用程序时视图未呈现。
在下面的 Adaptor 中，prodList 正确地填充为 Product 实体
import android.app.Activity;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.picasso.Picasso;
import java.util.List;
public class CustomProductListAdaptor extends ArrayAdapter {
//to reference the Activity
private final Activity context;
private final List<Product> productList;
public CustomProductListAdaptor(Activity context,List<Product> prodList){
super(context,R.layout.productlist_item);
this.context=context;
this.productList = prodList;
}
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater=context.getLayoutInflater();
View rowView=inflater.inflate(R.layout.productlist_item, null,true);
Toast.makeText(getContext(),"In getView",Toast.LENGTH_LONG).show();
//this code gets references to objects in the listview_row.xml file
TextView nameTextField = (TextView) rowView.findViewById(R.id.product_name);
TextView priceTextField = (TextView) rowView.findViewById(R.id.product_description);
ImageView imageView = (ImageView) rowView.findViewById(R.id.productImage);
//this code sets the values of the objects to values from the list
try {
nameTextField.setText(productList.get(position).getName());
priceTextField.setText(productList.get(position).getPrice()+"/-");
Uri imageUri = Uri.parse(productList.get(position).getImgUrl());
Picasso.with(context).load(imageUri).placeholder(R.drawable.selectphoto).into(imageView);
} catch (Exception e) {
e.printStackTrace();
}
return rowView;
}
}