Realm使用的相关问题 Changing Realm data can only be done from inside a transaction.

保存一个对象的时候报错

java.lang.IllegalStateException: Changing Realm data can only be done from inside a transaction.

代码：

    public static LocalData getLocalData(String id){
        Realm realm = Realm.getDefaultInstance();
        if(realm.isInTransaction()){
            realm.cancelTransaction();
        }
        realm.beginTransaction();
        LocalData loc = realm.where(LocalData.class)
                .equalTo("id", id)
                .findFirst();
        realm.commitTransaction();
        return loc;

    }

错误原因：

Realm还持有对象的引用

解决 ：return realm.copyFromRealm(loc);

    public static LocalData getLocalData(String id){
        Realm realm = Realm.getDefaultInstance();
        if(realm.isInTransaction()){
            realm.cancelTransaction();
        }
        realm.beginTransaction();
        LocalData loc = realm.where(LocalData.class)
                .equalTo("id", id)
                .findFirst();
        realm.commitTransaction();
        return realm.copyFromRealm(loc);

    }