如何从外部存储目录输出没有扩展名的文件？

我已经在堆栈上查看了类似的问题,并且找不到我在路上遇到的特定问题的答案是不成功的.我会捐给任何可以给我解决方案的人.

我试图从没有扩展名的外部存储目录显示内容(.txt文件).我已导入(apache.commons.io).

ArrayAdapter mArrayAdapter;
ListView listView;
String fileNames[];
ArrayList<String> nameArray;



protected void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    this.setContentView(R.layout.activity_read_note_menu);

    listView = (ListView) this.findViewById(R.id.readListView);
    fileNames = new File(String.valueOf(Environment.getExternalStorageDirectory().getAbsolutePath()) + "/Notes").list();

    nameArray = new ArrayList<>();

         for (String name: fileNames){
            name = name.substring(0, name.indexOf("."));
            nameArray.add(name);
            Log.d("Files", "FileName:" + name);

    }

    mArrayAdapter = new ArrayAdapter<>(this, R.layout.list_item_1, nameArray);
    mArrayAdapter.sort(new Comparator<String>() {

        public int compare(String li1, String li2) {

            return li1.compareto(li2);
        }

    });

    listView.setAdapter(mArrayAdapter);
    listView.setonItemClickListener(new AdapterView.OnItemClickListener() {

        public void onItemClick(AdapterView adapterView, View view, int i, long l) {
            String string = (String) listView.getItemAtPosition(i);
            Intent intent = new Intent(ReadNoteMenu.this, ReadNote.class);
            intent.putExtra(EXTRA_MESSAGE, string);
            ReadNoteMenu.this.startActivity(intent);

            finish();

        }

    });

解决方法:

确保从以下代码获取所有文件列表：

String fileNames[] = new  File(String.valueOf(Environment.getExternalStorageDirectory().getAbsolutePath()) + "/Notes").list();

获得所有文件列表后,从文件名中删除扩展名并将该名称存储在数组中.

ArrayList<String> nameArray = new ArrayList<String>();

for (String name: fileNames){
   name = name.substring(0, name.indexOf("."));
   nameArray.add(name);
   Log.d("Files", "FileName:" + name);
}

请在适配器中传递nameArray以完成任务,如下所示：

mArrayAdapter = new ArrayAdapter(this, R.layout.list_item_1, nameArray);