android - 无法通过活页夹创建光标窗口

1 Cursor cursor = contentResolver.query(MY_URI, new String[] { "first" }, null, null, null);
2 if (cursor != null) {
3   if (cursor.moveToFirst()) {
4       first = cursor.getString(cursor.getColumnIndex("first"));
5       cursor.close();
6   }
7 }

然后在第3行(根据日志)，我时不时地遇到此异常(以下摘录):

android.database.CursorWindowAllocationException: Cursor window could not be created from binder.
    at android.database.CursorWindow.<init>(CursorWindow.java:134)
    at android.database.CursorWindow.<init>(CursorWindow.java:41)
    at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:709)
    at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:707)
    at android.database.CursorWindow.newFromParcel(CursorWindow.java:718)
    at android.database.BulkCursorProxy.getWindow(BulkCursorNative.java:196)

...

任何想法为什么会引发此异常？谢谢!

最佳答案

我怀疑该错误可能与您一直没有正确关闭游标有关。尝试:

Cursor cursor = contentResolver.query(MY_URI, new String[] { "first" }, null, null, null);
if (cursor != null) {
  if (cursor.moveToFirst()) {
      first = cursor.getString(cursor.getColumnIndex("first"));
  }
  cursor.close(); ///// Changed here
}

游标应始终处于关闭状态(无论其是否为空)。确保您的应用程序的其余部分也正在执行此操作。

关于android - 无法通过活页夹创建光标窗口，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/14316082/