asLody/VirtualApp · error · java.lang.IllegalArgumentException

account is null

Error message

account is null

What it means

getPreviousName(userId, account) throws IllegalArgumentException('account is null') as a fail-fast guard when the caller passes a null Account. VirtualApp's VAccountManagerService mirrors Android's AccountManager contract, which requires a non-null account to look up the previous name. The throw happens before any account lookup or locking.

Solutions

1. Ensure the Account passed to getPreviousName is non-null before calling (check for null and skip/return)
2. Verify the code that produced the Account (getAccounts / getAccountsByTypeAndFeatures callback) and handle empty results instead of propagating null
3. Catch IllegalArgumentException around the call as a last resort and treat it as 'no previous name'

Example fix

// before
String prev = manager.getPreviousName(userId, account);
// after
if (account != null) {
    String prev = manager.getPreviousName(userId, account);
} else {
    String prev = null; // handle missing account
}

if (account == null) { throw new IllegalStateException("Cannot getPreviousName: account is null"); }

boolean isValidAccount(Account a) { return a != null && a.type != null && a.name != null; }

When it happens

Trigger: Calling getPreviousName with a null Account object, typically because an earlier AccountManager call (e.g. getAccounts, getAccountsByTypeAndFeatures) returned an array/entry the caller assumed was non-null, or a variable holding the account was never initialized.

Common situations: App code iterating accounts from a callback that can deliver empty/null results; refactors where an Account field is assigned null on failure; testing code that calls the service directly without constructing an Account.

Related errors

• response is null
• accountType is null
• authTokenType is null
• key is null
• features is null

AI-assisted analysis of asLody/VirtualApp@666fefcb5d (2026-09-09). Data as JSON: /api/errors/a64f0e0f41298f19. Report an issue: GitHub.

Appendix: source

Thrown at VirtualApp/lib/src/main/java/com/lody/virtual/server/accounts/VAccountManagerService.java:154

            return;
        }

        if (features == null || features.length == 0) {
            Bundle bundle = new Bundle();
            bundle.putParcelableArray(AccountManager.KEY_ACCOUNTS, getAccounts(userId, type));
            try {
                response.onResult(bundle);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        } else {
            new GetAccountsByTypeAndFeatureSession(response, userId, info, features).bind();
        }
    }

    @Override
    public final String getPreviousName(int userId, Account account) {
        if (account == null) throw new IllegalArgumentException("account is null");
        synchronized (accountsByUserId) {
            String previousName = null;
            VAccount vAccount = getAccount(userId, account);
            if (vAccount != null) {
                previousName = vAccount.previousName;
            }
            return previousName;
        }
    }


    @Override
    public Account[] getAccounts(int userId, String type) {
        List<Account> accountList = getAccountList(userId, type);
        return accountList.toArray(new Account[accountList.size()]);
    }

View on GitHub (pinned to 666fefcb5d)