Question

alexus@mbp:~ $ python
Python 2.7.10 (default, Oct 23 2015, 18:05:06) 
[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import json
>>> from pymongo import MongoClient
>>> client = MongoClient('mongodb://192.168.99.100:32768/')
>>> db = client['test']
>>> collection = db['c']
>>> 
>>> obj = 'adc83b19e793491b1c6ea0fd8b46cd9f32e592fc:{tag1:value1}'
>>> print obj
adc83b19e793491b1c6ea0fd8b46cd9f32e592fc:{tag1:value1}
>>> json.dumps(obj, separators=(',', ':'), sort_keys=True)
'"adc83b19e793491b1c6ea0fd8b46cd9f32e592fc:{tag1:value1}"'
>>> db.c.insert(json.dumps(obj, separators=(',', ':'), sort_keys=True))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/pymongo/collection.py", line 2199, in insert
    check_keys, manipulate, write_concern)
  File "/Library/Python/2.7/site-packages/pymongo/collection.py", line 578, in _insert
    gen(), check_keys, self.codec_options, bwc)
  File "/Library/Python/2.7/site-packages/pymongo/collection.py", line 546, in gen
    doc['_id'] = ObjectId()
TypeError: 'str' object does not support item assignment
>>>

例如我有一个public boolean updateCredential(Credentials credentials){ boolean isSuccessful = true; SQLiteDatabase db=null; String whereStatement = Constants.LOGIN_ITEM + "="; String[] bindValues = new String[] {credentials.getLoginItem().trim()}; ContentValues values = new ContentValues(); try{ db=helper.getWritableDatabase(); db.update(Constants.TABLE_NAME, values, whereStatement, bindValues); db.close(); IsSuccessful=true; }finally{ db.close(); } return isSuccessful; }方法，我在表单中称之为

addcredential()

Answer 1

使用以下方法调用

public void updateRecord(View v){
    credentials.setLoginItem(loginItemText.getText().toString());
    if(db.updateCredential(credentials))
    {
        Toast.makeText(this, "Record updated",Toast.LENGTH_SHORT).show();
        //show your toast
    }
    else
    {
        // updation failed
    }
}

如何在我的main.java（android）上调用它

1 个答案: