小编MOH*_*S3N的帖子

这是我的代码：

import os

def get_file():
    files = os.listdir('F:/Python/PAMC')
    print(files)

    for file in files:
        print(file)

get_file()

我如何只列出python目录中的文件夹？

如何time4J在Java中获取当前的波斯日期？

PersianCalendar jalali = new PersianCalendar();

这是我的代码：

transactionTypeSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(MainActivity.this, "Something changed", LENGTH_SHORT).show();
        }
    });

但不幸的是OnItemClickListener方法不起作用并显示此消息：setOnItemClickListener cannot be used with a spinner.

我该如何解决这个问题？

谢谢！

我sqlite用这种形式写了句子:

String SQL_CREATE_BACKUP  ="CREATE TABLE " +smsEntry.BACKUP +"("
            +smsEntry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
            +smsEntry.BACKUP_LAST_MODE +" INTEGER NOT NULL,"
            +smsEntry.BACKUP_CURRENT_MODE +" INTEGER NOT NULL,"
            +smsEntry.BACKUP_LAST_TYPE +" INTEGER NOT NULL,"
            +smsEntry.BACKUP_CURRENT_TYPE +" INTEGER NOT NULL,"
            +smsEntry.BACKUP_MILLI_DATE +" LONG NOT NULL,"
            +smsEntry.BACKUP_CURRENT_DATE + " TEXT NOT NULL);";

 db.execSQL(SQL_CREATE_BACKUP);

但是,当我想运行此代码时,我收到此错误消息:

<column definition name> or <table constraint>expected,got 'current_date'

我该如何修复这个错误？

Thankes.

我把这两个插入ArraysList到这个List:

    ArrayList<String> category = new ArrayList<>();
    ArrayList<Integer> number = new ArrayList<>();
    List list = new ArrayList<>();

    category.add("cat");
    category.add("dog");
    category.add("fish");
    category.add("Hamster");

    number.add(1);
    number.add(2);
    number.add(3);
    number.add(4);

    list.add(category);
    list.add(number);

现在我如何获得此列表中每个数组的大小？