恢复我的应用程序使其因游标管理而崩溃

时间:2012-01-23 21:00:57

标签: android cursor resume

我的应用程序中有很多Cursor,我正在尝试清楚地管理它们。 我按照tutos的说法做了:最后关闭它们。 但是,在我的带有ICS的Nexus S上,当我恢复我的应用程序时,我崩溃了

01-23 21:52:32.125: E/AndroidRuntime(14037): Caused by: android.database.StaleDataException: Attempted to access a cursor after it has been closed.

我在互联网上看到一些答案,说我应该使用LoaderManager来管理它们,但我不确定它是否适合我的情况。 这是我使用游标的函数:

public static HashMap<String, Contact> getContacts(BaseActivity activity) {
    HashMap<String, Contact> contactMap = new HashMap<String, Contact>();
    ArrayList<String> allPhones =null;
    try{
        Log.d(Constants.LOGTAG,"=!=!=!=!=!=!=!=!=!=! GET CONTACTS (HashMap) =!=!=!=!=!=!=!=!=!=!=!=!=!=!");
        // Run query
        String thePhone;
        int id;
        Uri uri = ContactsContract.Contacts.CONTENT_URI;
        String[] projection = new String[] {
                ContactsContract.Contacts._ID,
                ContactsContract.Contacts.DISPLAY_NAME,
                ContactsContract.Contacts.HAS_PHONE_NUMBER };

        Cursor cursor = activity.managedQuery(uri, projection, null, null, null);
        //activity.startManagingCursor(cursor);
        if (cursor.moveToFirst()) {
            while (!cursor.isAfterLast()) {
                id = cursor.getInt(0);
                if (cursor.getInt(2) == 1) {

                    Contact c = new Contact(id, cursor.getString(1),null,getAllPhoneNumber(activity, id));
                    Contact c2 = new Contact(id, cursor.getString(1),null,getAllPhoneNumber(activity, id));
                    allPhones = c.getPhoneNumber();
                    for(String phone:allPhones){
                        thePhone = phone;
                        c2.getPhoneNumber().clear();
                        c2.setIndicatif("+33");
                        thePhone = thePhone.replaceAll(" ", "");

                        if(thePhone.startsWith("00")){//On vire le 0033
                            thePhone = thePhone.substring(4);
                        }
                        else if(thePhone.startsWith("+")){//On vire le +33
                            thePhone =thePhone.substring(3);
                        }
                        if(thePhone.startsWith("0")){
                            thePhone = thePhone.substring(1);
                        }
                        //c.getPhoneNumber().add(thePhone);
                        c2.getPhoneNumber().add(thePhone);
                        contactMap.put(thePhone,c2);
                    }
                }
                cursor.moveToNext();
            }
        }
        cursor.close();
    }catch (Exception e) {
        e.printStackTrace();
    }
    Whosupp.setAdresseBookHM(contactMap);
    return contactMap;
}

/**
 * Obtains the contact list from the Adress Book for the currently selected account SORTED BY NAME
 * 
 * @return a list of all contact.
 */
public static ArrayList<Contact> getContactsSortedByName(BaseActivity activity) {
    ArrayList<Contact> contactList = new ArrayList<Contact>();
    ArrayList<String> allPhones =null;
    try{
        Log.d(Constants.LOGTAG,"=!=!=!=!=!=!=!=!=!=! GET CONTACTS (ArrayList) =!=!=!=!=!=!=!=!=!=!=!=!=!=!");
        // Run query
        String thePhone;
        Uri uri = ContactsContract.Contacts.CONTENT_URI;
        String[] projection = new String[] {
                ContactsContract.Contacts._ID,
                ContactsContract.Contacts.DISPLAY_NAME,
                ContactsContract.Contacts.HAS_PHONE_NUMBER };

        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
                + " COLLATE LOCALIZED ASC";

        Cursor cursor = activity.managedQuery(uri, projection, null, null, sortOrder);
        //activity.startManagingCursor(cursor);
        if (cursor.moveToFirst()) {
            while (!cursor.isAfterLast()) {
                int id = cursor.getInt(0);
                if (cursor.getInt(2) == 1) {


                    Contact c = new Contact(id, cursor.getString(1),null,getAllPhoneNumber(activity, id));

                    allPhones = c.getPhoneNumber();
                    for(String phone:allPhones){
                        thePhone = phone;
                        c.getPhoneNumber().clear();
                        c.setIndicatif("+33");
                        thePhone = thePhone.replaceAll(" ", "");

                        if(thePhone.startsWith("00")){//On vire le 0033
                            thePhone = thePhone.substring(4);
                        }
                        else if(thePhone.startsWith("+")){//On vire le +33
                            thePhone =thePhone.substring(3);
                        }
                        if(thePhone.startsWith("0")){
                            thePhone = thePhone.substring(1);
                        }
                        //c.getPhoneNumber().add(thePhone);

                        contactList.add(c);
                    }
                }
                cursor.moveToNext();
            }
        }
        cursor.close();
    }catch (Exception e) {
        e.printStackTrace();
    }

    return contactList;
}

/**
 * Get the first phone number of a contact
 * 
 * @param contactId
 *            the contact's id
 * @return the first phone number of the contact ! 
 */
public static ArrayList<String> getFirstPhoneNumber(BaseActivity activity, int contactId) {
    final String[] projection = new String[] { Phone.NUMBER };
    ArrayList<String>  number=new ArrayList<String>();
    Cursor phone = activity.managedQuery(Phone.CONTENT_URI, projection,
            Data.CONTACT_ID + "=?",
            new String[] { String.valueOf(contactId) }, null);
    //activity.startManagingCursor(phone);

    if (phone.moveToFirst()) {
        number.add(phone.getString(phone.getColumnIndex(Phone.NUMBER)));
    }
    phone.close();
    return number;
}

/**
 * Get all phone number of a contact
 * 
 * @param contactId
 *            the contact's id
 * @return a list of all phone number of the contact
 */
public static ArrayList<String> getAllPhoneNumber(BaseActivity activity, int contactId) {
    final String[] projection = new String[] { Phone.NUMBER };
    String number = "";
    Cursor phone = activity.managedQuery(Phone.CONTENT_URI, projection,
            Data.CONTACT_ID + "=?",
            new String[] { String.valueOf(contactId) }, null);
    //activity.startManagingCursor(phone);
    ArrayList<String> phoneNumber = new ArrayList<String>();

    if (phone.moveToFirst()) {
        final int contactNumberColumnIndex = phone.getColumnIndex(Phone.NUMBER);

        while (!phone.isAfterLast()) {
            number = phone.getString(contactNumberColumnIndex);
            if(number.contains("305875"))               Log.d(Constants.LOGTAG,"I'm here "+number);
            phoneNumber.add(number);
            phone.moveToNext();
        }
    }
    phone.close();
    return phoneNumber;
}

正如你所看到的,我试图使用“startManagingCursor”,但它甚至更糟...... 有没有人面对这个并最终解决了它? 我应该使用LoaderManager吗?

5 个答案:

答案 0 :(得分:1)

根据android文档

  

警告:不要对使用此方法获得的游标调用close(),   因为活动会在适当的时候为你做。   但是,如果从a上的光标上调用stopManagingCursor(Cursor)   托管查询,系统不会自动关闭光标,   在这种情况下,您必须调用close()。

所以请尝试删除代码中的cursor.close();

答案 1 :(得分:0)

我正在研究代码,无法找到onResume的开头/ startmanaging /重新创建cursores。我会在这里寻找错误。

答案 2 :(得分:0)

你有两个选项可以使用activity方法startManagingCursor(...),或者你只是停止尝试使用onResume()中关闭或为空的cusor做某事。

答案 3 :(得分:0)

答案是:

manageQuery只需打开一个MANAGED游标(一个随StartManagingCursor提供的游标)。因此,游标不需要关闭。

但是,因为在我们的应用程序中我们使用了超过1个游标,所以使用托管游标很糟糕,因此我们使用“简单”游标并在完成后关闭它们。所以我们只需要做一个简单的Query而不是ManagedQuery ......

答案 4 :(得分:0)

像这样写onResume()

    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        if (!dbHelper.db.isOpen()) {
            dbHelper.open();
        }

        cursor.requery();
    }