How to Clear Database in Realm in Android

问题

I want to clear whole database when a user press logout button and loads a new data when another user login.I tried many solutions like

try {
        Realm.deleteRealm(realmConfiguration);   
    } catch (Exception ex){
        throw ex;
    }

Also

 try {
        Realm.deleteRealmFile(getActivity());
        //Realm file has been deleted.
    } catch (Exception ex){
        ex.printStackTrace();
        //No Realm file to remove.
    }

But neither of the code works. Thanks in advance.

回答1:

When you call Realm.deleteRealm(), you have to make sure all the Realm instances are closed, otherwise an exception will be thrown without deleting anything. By calling this method, all Realm files are deleted, which means all objects & schemas are gone. Catching all exceptions is a bad practise for any general cases.

Or you can call Realm.delelteAll() in a transaction block. This doesn't require all Realm instances closed. It will just delete all the objects in the Realm without clearing the schemas. And again, don't catch all exceptions.

回答2:

If you are sure there are not any other databases you want to save, you can delete all the other data also. you can follow this answer Clear Application's Data Programmatically

来源：https://stackoverflow.com/questions/37648071/how-to-clear-database-in-realm-in-android