Intent.ACTION_PICK返回一些接触空光标(Intent.ACTION_PICK ret

我有一个应用程序，其中一个方面是一种用于用户选择一个联系人，并发送文本到该联系人通的应用程序。该程序只适用于一些接触和失败别人。更确切地说：

对于我的手进入了我的通讯录联系人时， Intent.ACTION_PICK有任何麻烦找到并返回给应用程序，即cursor.moveToFirst()是正确的。

但对于被Facebook导入的联系人（我的手机设置与Facebook联系人同步），我得到以下android.database.CursorIndexOutOfBoundsException后，我点击联系人。一个明显的问题，我有是：为什么是结果大小为0后，我从字面上选择的联系？为什么cursor.moveToFirst()假的？

...Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.database.AbstractCursor.checkPosition(AbstractCursor.java:418)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.database.CursorWrapper.getString(CursorWrapper.java:114)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at com.company.Game.SendTextActivity.onActivityResult(SendTextActivity.java:118)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.app.Activity.dispatchActivityResult(Activity.java:5436)
05-15 17:57:04.741: E/AndroidRuntime(21301):    at android.app.ActivityThread.deliverResults(ActivityThread.java:3188)
05-15 17:57:04.741: E/AndroidRuntime(21301):    ... 11 more

这里是我的代码：

dispatchIntent：

Intent pickContactIntent = new Intent(Intent.ACTION_PICK,  Uri.parse("content://contacts"));
pickContactIntent.setType(Phone.CONTENT_TYPE); // Show user only contacts w/ phone numbers
    startActivityForResult(pickContactIntent, PICK_CONTACT_REQUEST);

onActivity结果：

(requestCode == PICK_CONTACT_REQUEST) {
            // Get the URI that points to the selected contact
            Uri contactUri = data.getData();
            // We only need the NUMBER column, because there will be only one row in the result
            String[] projection = { Phone.NUMBER };

            // Perform the query on the contact to get the NUMBER column
            // We don't need a selection or sort order (there's only one result for the given URI)
            // CAUTION: The query() method should be called from a separate thread to avoid blocking
            // your app's UI thread. (For simplicity of the sample, this code doesn't do that.)
            // Consider using CursorLoader to perform the query.
            Cursor cursor = getContentResolver()
                .query(contactUri, projection, null, null, null);
            cursor.moveToFirst();

            // Retrieve the phone number from the NUMBER column
            int column = cursor.getColumnIndex(Phone.NUMBER);
            String number = cursor.getString(column);

            //do work with number here ...
        }

注：我看到的联系人。但之后，我选择了Facebook导入的联系人，我得到的崩溃。

BTW：我的代码片段被从Android教程复制正是： http://developer.android.com/training/basics/intents/result.html

Answer 1:

你无法通过联系人API访问FB接触。

Answer 2:

要解决死机，你应该检查moveToFirst（）这样的结果：

String number = null;
if (cursor.moveToFirst()) {
   number = cursor.getString(0); // 0 matches the index of NUMBER in your projection.
}

为了探索提供给您的数据的性质我想传递“空”的投影，使得所有的领域回来，并转储字段名称和值。你可能会发现你正在寻找的数据，只是没有数字字段。