android-discuss, Problem in using api of AbstractAccountAuthenticator, in android.accounts

 Hi geeks!

Im new to the android.accounts apis, and now Im trying to do something
with them but a seemly dummy problem occurs...
I`ve created an Authenticator for my app but did not yet implement the
abstract methods. The icon of it successfully appears in the system
Add a Account window, and I know that when I click it, the method
addAccount in the Authenticator will be invoked.

Now I wish to do some simple thing in this method, and write codes
below:

@Override
public Bundle addAccount(AccountAuthenticatorResponse response,
        String accountType, String authTokenType, String[]
requiredFeatures,
        Bundle options) {

    String accountName = "exam...@example.com";
    Account account = new Account(accountName, accountType);
    String password = "example_password";
    AccountManager manager = AccountManager.get(context);
    manager.addAccountExplicitly(account, password, null);

    Bundle bundle = new Bundle();
    bundle.putString(AccountManager.KEY_ACCOUNT_NAME, accountName);
    bundle.putString(AccountManager.KEY_ACCOUNT_TYPE, accountType);
    bundle.putString(AccountManager.KEY_AUTHTOKEN,
"example_authtoken");
    return bundle;
}

Ive seen the demo of SampleSyncAdapter, and make moves like it. But I
practice using these APIs by directly adding an account. But system
crashed by the line manager.addAccountExplicitly(account, password,
null); Whats wrong with it?

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