错误代码:
ListItem2Adapter adapter = new ListItem2Adapter(ListItem2Activity.this,R.layout.list_item_pic,data);
ListItem2Adapter.java :
public class ListItem2Adapter extends ArrayAdapter<ListItemPic> {
private int resourceId;
public ListItem2Adapter(Context context, int resourceId, List<ListItemPic> data){
super(context,resourceId,data);
this.resourceId = resourceId;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
ListItemPic item = getItem(position);
View view = LayoutInflater.from(getContext()).inflate(resourceId,parent,false);
ImageView ivItem = view.findViewById(R.id.iv_list_item_left_icon);
TextView tvItem = view.findViewById(R.id.tv_list_item_pic_text);
ivItem.setImageResource(item.getImageId());
tvItem.setText(item.getText());
return view;
}
}
R.layout.list_item_pic:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" android:layout_margin="10dp">
<ImageView
android:id="@+id/iv_list_item_left_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/tv_list_item_pic_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_gravity="center_vertical"
/>
</LinearLayout>
错误原因:ArrayAdapter的第二个参数,该资源必须是个TextView
解决方案:把上面的xml中的根节点换成TextView