从 android 工作室的内部存储中删除列表

Question

I have been trying to delete a list of selected items from internal storage but unable to do so.

List<ItemFiles> selectList = new ArrayList<>(); // list to delete
 case R.id.delete:
     File dir = activity.getFilesDir();
     File file = new File(dir, String.valueOf(selectList));
     file.delete();

It does not do anything. There is a warning over delete "Result of 'File.delete()' is ignored". How do I change it or is there any better way? Any help would be appreciated Thanks.

Answer 1

 File file = new File(dir, String.valueOf(selectList)); 

You are trying to convert a list to a String

You need to iterate over the list instead

List<ItemFiles> selectList = new ArrayList<>(); // list to delete
case R.id.delete:
 File dir = activity.getFilesDir();
 for (ItemFiles someFile : selectList) {
     File file = new File(dir, String.valueOf(someFile));
    file.delete(); 
 }

Also make sure that ItemFiles class overrides toString() that returns the file name.