具有单一活动应用程序的AccountAuthentication

Question

我尝试使用的服务器为我的应用程序创建身份验证  AbstractAccountAuthenticator和AccountManager。我也在尝试创建单一活动应用程序。 addAccount我的问题是我需要在“ AbstractAccountAuthenticator中的addAccount（）”中指定一个意图以运行AuthActivity。我该如何仅仅为了启动一个片段或类似目的来实现这些目的？在单一活动应用程序中实施这种身份验证可能还有哪些其他选择？

我的想法是创建一个旨在启动MainActivity的意图，并且已经借助Bundle start片段来管理活动结果。

具有多活动应用程序的经典实现

@Override
    public Bundle addAccount(AccountAuthenticatorResponse response, String accountType, String authTokenType, String[] requiredFeatures, Bundle options) throws NetworkErrorException {
        Log.d("udinic", TAG + "> addAccount");

        final Intent intent = new Intent(mContext, AuthenticatorActivity.class);
        intent.putExtra(AuthenticatorActivity.ARG_ACCOUNT_TYPE, accountType);
        intent.putExtra(AuthenticatorActivity.ARG_AUTH_TYPE, authTokenType);
        intent.putExtra(AuthenticatorActivity.ARG_IS_ADDING_NEW_ACCOUNT, true);
        intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);

        final Bundle bundle = new Bundle();
        bundle.putParcelable(AccountManager.KEY_INTENT, intent);
        return bundle;
    }

    @Override
    public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) throws NetworkErrorException {

        Log.d("udinic", TAG + "> getAuthToken");

        // If the caller requested an authToken type we don't support, then
        // return an error
        if (!authTokenType.equals(AccountGeneral.AUTHTOKEN_TYPE_READ_ONLY) && !authTokenType.equals(AccountGeneral.AUTHTOKEN_TYPE_FULL_ACCESS)) {
            final Bundle result = new Bundle();
            result.putString(AccountManager.KEY_ERROR_MESSAGE, "invalid authTokenType");
            return result;
        }

        // Extract the username and password from the Account Manager, and ask
        // the server for an appropriate AuthToken.
        final AccountManager am = AccountManager.get(mContext);

        String authToken = am.peekAuthToken(account, authTokenType);

        Log.d("udinic", TAG + "> peekAuthToken returned - " + authToken);

        // Lets give another try to authenticate the user
        if (TextUtils.isEmpty(authToken)) {
            final String password = am.getPassword(account);
            if (password != null) {
                try {
                    Log.d("udinic", TAG + "> re-authenticating with the existing password");
                    authToken = sServerAuthenticate.userSignIn(account.name, password, authTokenType);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

        // If we get an authToken - we return it
        if (!TextUtils.isEmpty(authToken)) {
            final Bundle result = new Bundle();
            result.putString(AccountManager.KEY_ACCOUNT_NAME, account.name);
            result.putString(AccountManager.KEY_ACCOUNT_TYPE, account.type);
            result.putString(AccountManager.KEY_AUTHTOKEN, authToken);
            return result;
        }

        // If we get here, then we couldn't access the user's password - so we
        // need to re-prompt them for their credentials. We do that by creating
        // an intent to display our AuthenticatorActivity.
        final Intent intent = new Intent(mContext, AuthenticatorActivity.class);
        intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
        intent.putExtra(AuthenticatorActivity.ARG_ACCOUNT_TYPE, account.type);
        intent.putExtra(AuthenticatorActivity.ARG_AUTH_TYPE, authTokenType);
        intent.putExtra(AuthenticatorActivity.ARG_ACCOUNT_NAME, account.name);
        final Bundle bundle = new Bundle();
        bundle.putParcelable(AccountManager.KEY_INTENT, intent);
        return bundle;
    }


    @Override
    public String getAuthTokenLabel(String authTokenType) {
        if (AUTHTOKEN_TYPE_FULL_ACCESS.equals(authTokenType))
            return AUTHTOKEN_TYPE_FULL_ACCESS_LABEL;
        else if (AUTHTOKEN_TYPE_READ_ONLY.equals(authTokenType))
            return AUTHTOKEN_TYPE_READ_ONLY_LABEL;
        else
            return authTokenType + " (Label)";
    }