我使用从示例代码谷歌的教程 。 投影是我指定我要收集的数据。 如何指定我想要的电话号码 ？ 从谷歌的样品没有得到电话号码。 但我想获得的电话号码，所以我添加字段Phone.NUMBER 。 但是，当我这样做，应用程序总是崩溃。 这是我的投影。
// The projection for the CursorLoader query. This is a list of columns that the Contacts
// Provider should return in the Cursor.
@SuppressLint("InlinedApi")
final static String[] PROJECTION = {
// The contact's row id
Contacts._ID,
// A pointer to the contact that is guaranteed to be more permanent than _ID. Given
// a contact's current _ID value and LOOKUP_KEY, the Contacts Provider can generate
// a "permanent" contact URI.
Contacts.LOOKUP_KEY,
// In platform version 3.0 and later, the Contacts table contains
// DISPLAY_NAME_PRIMARY, which either contains the contact's displayable name or
// some other useful identifier such as an email address. This column isn't
// available in earlier versions of Android, so you must use Contacts.DISPLAY_NAME
// instead.
Utils.hasHoneycomb() ? Contacts.DISPLAY_NAME_PRIMARY : Contacts.DISPLAY_NAME,
// In Android 3.0 and later, the thumbnail image is pointed to by
// PHOTO_THUMBNAIL_URI. In earlier versions, there is no direct pointer; instead,
// you generate the pointer from the contact's ID value and constants defined in
// android.provider.ContactsContract.Contacts.
Utils.hasHoneycomb() ? Contacts.PHOTO_THUMBNAIL_URI : Contacts._ID,
// The sort order column for the returned Cursor, used by the AlphabetIndexer
SORT_ORDER,
// Contacts.HAS_PHONE_NUMBER,
//
CommonDataKinds.Phone.NUMBER,
};
// The query column numbers which map to each value in the projection
final static int ID = 0;
final static int LOOKUP_KEY = 1;
final static int DISPLAY_NAME = 2;
final static int PHOTO_THUMBNAIL_DATA = 3;
final static int SORT_KEY = 4;
// final static int HAS_PHONE_NUMBER = 5;
final static int PHONE_NUMBER = 5;
}
这里是错误跟踪
12-18 10:20:54.299: E/AndroidRuntime(1909): FATAL EXCEPTION: ModernAsyncTask #1
12-18 10:20:54.299: E/AndroidRuntime(1909): java.lang.RuntimeException: An error occured while executing doInBackground()
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:137)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.lang.Thread.run(Thread.java:841)
12-18 10:20:54.299: E/AndroidRuntime(1909): Caused by: java.lang.IllegalArgumentException: Invalid column data1
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:167)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.content.ContentProviderProxy.query(ContentProviderNative.java:385)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.content.ContentResolver.query(ContentResolver.java:417)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.content.ContentResolver.query(ContentResolver.java:360)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:49)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:35)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.AsyncTaskLoader.onLoadInBackground(AsyncTaskLoader.java:242)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:51)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:40)
12-18 10:20:54.299: E/AndroidRuntime(1909): at android.support.v4.content.ModernAsyncTask$2.call(ModernAsyncTask.java:123)
12-18 10:20:54.299: E/AndroidRuntime(1909): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
12-18 10:20:54.299: E/AndroidRuntime(1909): ... 3 more
