使用 CursorLoader 获取所有者的电子邮件地址

Posted 2023-04-17

【中文标题】使用 CursorLoader 获取所有者的电子邮件地址

【英文标题】：Get owner's email address with CursorLoader

【发布时间】：2012-07-05 18:03:02

【问题描述】：

我正在尝试用所有者的电子邮件填充 ArrayList。我在一个片段中这样做。这是我的代码：

 public class ItemDetailFragment extends Fragment implements
        LoaderManager.LoaderCallbacks<Cursor> 

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

    @Override
    public void onActivityCreated(Bundle savedInstanceState) 
        super.onActivityCreated(savedInstanceState);
        getLoaderManager().initLoader(0, null, this);

    


        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) 
                View myFragmentView = inflater.inflate(R.layout.formal_email_layout,
                                container, false);
                return myFragmentView;
       


 public Loader<Cursor> onCreateLoader(int id, Bundle arguments) 
            return new CursorLoader(getActivity(),
                    // Retrieve data rows for the device user's 'profile' contact.
                    Uri.withAppendedPath(
                            ContactsContract.Profile.CONTENT_URI,
                            ContactsContract.Contacts.Data.CONTENT_DIRECTORY),
                    ProfileQuery.PROJECTION,

                    // Select only email addresses.
                    ContactsContract.Contacts.Data.MIMETYPE + " = ?",
                    new String[]ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE,

                    // Show primary email addresses first. Note that there won't be
                    // a primary email address if the user hasn't specified one.
                    null);
        

public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) 
            List<String> emails = new ArrayList<String>();
            cursor.moveToFirst();
            while (!cursor.isAfterLast()) 
                emails.add(cursor.getString(ProfileQuery.ADDRESS));
                // Potentially filter on ProfileQuery.IS_PRIMARY
                cursor.moveToNext();
            

               Log.d("test", cursor.getString(ProfileQuery.ADDRESS));
            


public void onLoaderReset(Loader<Cursor> cursorLoader) 
            

            private interface ProfileQuery 
                String[] PROJECTION = 
                        ContactsContract.CommonDataKinds.Email.ADDRESS,
                        ContactsContract.CommonDataKinds.Email.IS_PRIMARY,
                ;

                int ADDRESS = 0;
                int IS_PRIMARY = 1;
            

    

我基本上使用了here 给出的示例，我只是将它改编成一个片段。

当片段被午餐时，应用程序崩溃并且我得到这个错误：

07-05 12:27:55.235: W/dalvikvm(23217): threadid=1: thread exiting with uncaught exception (group=0x40c2f1f8)
07-05 12:27:55.235: E/androidRuntime(23217): FATAL EXCEPTION: main
07-05 12:27:55.235: E/AndroidRuntime(23217): android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0

（我的设备上有一个 Gmail 帐户）

【参考方案1】：

这是一个获取所有者电子邮件的小类。

您只能使用获取帐户名称（谷歌同步电子邮件地址）的代码的第一部分。

https://github.com/jehy/Android-GetOwnerInfo