Unable to resume activity : android.database.StaleDataException: Attempted to access a cursor after it has been closed. 异常
ContentResolver cr = this.getContentResolver();
Cursor actualimagecursor= cr.query(uri, proj,null, null, null);
// @SuppressWarnings("deprecation") --会导致错误
// Cursor actualimagecursor = this.managedQuery(uri, proj, null, null,
// null);