Android光標錯誤 - 確保光標已正確初始化

我已經設置了一個光標，我想要返回具有電話號碼的聯繫人的列表視圖。因此，在每個單元格中，我都會有聯繫人姓名和電話號碼。此代碼主要是做這項工作：Android光標錯誤 - 確保光標已正確初始化

// this query only return contacts with phone number and is not duplicated 
     phones = getContentResolver().query(
       ContactsContract.Contacts.CONTENT_URI, 
       null, 
//    we only want contacts that have a name and a phone number. If they have a phone number, the value is 1 (if not, it is 0) 
       ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" + ("1") + "'" + " AND " + ContactsContract.Contacts.HAS_PHONE_NUMBER + "=1", 
       null, 
       ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC");

然後當它涉及到提取信息，並把它在每個單元：

 while (phones.moveToNext()) { 

      String name = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); 
      String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

我發現了一個錯誤，這是部分代碼：

04-07 10:43:46.489 17742-17760/com.example.chris.contactlistcustomlistview E/CursorWindow﹕ Failed to read row 0, column -1 from a CursorWindow which has 134 rows, 34 columns. 
04-07 10:43:46.489 17742-17760/com.example.chris.contactlistcustomlistview W/dalvikvm﹕ threadid=11: thread exiting with uncaught exception (group=0x416168e0) 
04-07 10:43:46.489 17742-17760/com.example.chris.contactlistcustomlistview E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1 
    java.lang.RuntimeException: An error occured while executing doInBackground() 
      at android.os.AsyncTask$3.done(AsyncTask.java:299) 
      at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352) 
      at java.util.concurrent.FutureTask.setException(FutureTask.java:219) 
      at java.util.concurrent.FutureTask.run(FutureTask.java:239) 
      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 
      at java.lang.Thread.run(Thread.java:841) 
    Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it. 
      at android.database.CursorWindow.nativeGetString(Native Method)

因此，光標從Contacts.Contracts跳躍到ContactsContract.CommonDataKinds.Phone，它不喜歡它。但是，我還能如何獲得用戶的電話號碼？據我所知，它不在ContactsContracts.Contacts。在進入CommonDataKinds之前，我應該重新初始化光標還是其他東西？我該怎麼做？

來源

2016-04-07 CHarris

if (phones != null) { 
    phones.moveToFirst(); 
}

來源

2016-04-17 22:58:24 CHarris

您是否試過在phones.moveToNext（）之前調用phones.moveToFirst（）？它移動到第一行。這是因爲您當前的查詢返回位於第一個條目之前的Cursor對象。

您可以嘗試寫：

if (phones.moveToFirst()) { 

     while (phones.moveToNext()) { 
        // etc

來源

2016-04-07 10:33:43

感謝PlanetAstro，但是這並沒有解決它。同樣的錯誤。無論如何，我認爲movetonext和movetofirst總是從表中的第一個位置開始。 – CHarris

Android光標錯誤 - 確保光標已正確初始化

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