单击按钮后从微调器中删除对象

Question

所以我的应用程序有可以动态添加的微调器，它们是从一个巨大的 Course 对象数组列表中填充的，就像这样

courseSpinner = rowView.findViewById(R.id.first_spinner);
            ArrayAdapter<Course> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, courseList);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            courseSpinner.setAdapter(adapter);
            parentLayout.addView(rowView, parentLayout.getChildCount() - 1);
            allSpinners.add(courseSpinner); //this is an ArrayList of spinners that keeps track of how many spinners exist currently since like mentioned before they can be dynamically added or removed

我想从每个新生成的微调器中删除按下按钮后选择的值。按下按钮时将值保存到单独的哈希映射并删除所有现有的微调器，但我需要实现某种将被调用的更新方法，该方法将重新填充或从 courseList 中减去值，微调器从中获取它们的值.感谢任何帮助

Answer 1

这是带有适配器和列表的微调器：

ArrayAdapter<String> arrayAdapter;
arrayAdapter= new ArrayAdapter<String>(this, R.layout.spinner_indication, yourList); 
Spinner yourSpinner;
yourSpinner.setAdapter(arrayAdapter)

从旧列表创建的新列表将其设置为适配器，如下所示：

yourList = newGeneratedList ;
arrayAdapet.notifyDataSetChanged();

单击按钮后从微调器中删除对象

Remove an object from a spinner once a button is clicked

java

android

spinner