我在SQLite(Android)中获得了数据库对象未关闭异常,但我明确关闭了我的数据库...帮助？

Question

这是错误:

02-08 16:35:00.899:错误/数据库(468):android.database.sqlite.DatabaseObjectNotClosedException:应用程序未关闭此处打开的游标或数据库对象

除此之外,我是.以下是发生此问题的方法:

    public static void getUpdates(String username, Context context) {
    HttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost = new HttpPost("http://10.0.2.2/tag/appgetfriendinfo.php");

    try {
        List<NameValuePair> nVPs = new ArrayList<NameValuePair>();
        nVPs.add(new BasicNameValuePair("username", username));

        httpPost.setEntity(new UrlEncodedFormEntity(nVPs));
        HttpResponse response = httpClient.execute(httpPost);

        ResponseHandler<String> rHandler = new BasicResponseHandler();
        String result = rHandler.handleResponse(response);

        JSONArray jArray = new JSONArray(result);
        for(int i = 0; i < jArray.length(); i++) {
            JSONObject jObj = jArray.getJSONObject(i);
            String userCheck = jObj.getString("username");
            TagDBAdapter dbHelper = new TagDBAdapter(context);
            dbHelper.open();//OPENING THE DATABASE
            Contact contact = new Contact();

            String first = jObj.getString("firstname");
            String last = jObj.getString("lastname");
            String name = first + " " + last;

            contact.setUsername(jObj.getString("username"));
            contact.setFirstName(first);
            contact.setLastName(last);
            contact.setName(name);
            contact.setPhoneNumber(jObj.getString("phonenumber"));
            contact.setEmail(jObj.getString("email"));
            contact.setHomePhone(jObj.getString("homephone"));
            contact.setWorkPhone(jObj.getString("workphone"));

            if(dbHelper.checkForExisting(userCheck) == true) {
                dbHelper.createContact(contact);
            }
            else {
                dbHelper.updateContactAuto(userCheck, contact);
            }
            dbHelper.close();//CLOSING THE DATABASE
        }

    } catch(ClientProtocolException e) {
        Log.e("GETUPDATES", "CPE", e);
        e.printStackTrace();
    } catch(IOException e) {
        Log.e("GETUPDATES", "IOE", e);
        e.printStackTrace();
    } catch(JSONException e) {
        Log.e("GETUPDATES", "JSONE", e);
        e.printStackTrace();
    }
}

正如你在//注释中注意到的那样,我正在打开并关闭数据库,但我仍然收到错误.这是奇怪的,错误的来源是在SQLite的open()方法中.

错误/数据库(468):at com.tagapp.android.TagDBAdapter.open(TagDBAdapter.java:62)

这是:

    /**THESE ARE MY DBADAPTER'S OPEN AND CLOSE METHODS*/

    public TagDBAdapter open() throws SQLException {
    mDBHelper = new DatabaseHelper(m_context);
    mDb = mDBHelper.getWritableDatabase();
    return this;
}

public void close() {
    mDBHelper.close();
}

这些都是谷歌的记事本教程,他们在不同的情况下100%为我工作.有没有人知道这里发生了什么？非常感谢.

Answer 1

问题不是数据库对象,而是光标 - 你有一个打开的光标在某处.

在关闭数据库之前,请确保关闭所有游标.(顺便说一句,如果你想要花哨,你可以创建一个ContentProvider,使用SQLiteOpenHelper而不用担心关闭它.)