如何在我的应用程序中实现AccountManager

Question

我尝试在我的应用程序中实现一个帐户管理器，以避免用户每次打开应用程序时都必须登录。

所以基本上，我已经有了我的身份验证活动，用户可以在其中输入登录名和密码以及我们从服务器接收令牌的地方（此时身份验证是基本的）。 现在我想添加AccountManager，但我真的不明白哪个部分会去哪里。

我需要的是非常基本的：

• 如果我之前从未登录过，请添加一个帐户
• 如果我的帐户存在，则自动记录
• 如果自动身份验证不起作用，请在服务器上获取新令牌

这是我的代码：

AuthenticationActivity.java

public class AuthenticationActivity extends Activity {

    private EditText editTextUsername;
    private EditText editTextPassword;
    private Button buttonLogin;
    private ProgressBar spinner;
    private TextView error;
    private TextView register;

    private boolean accountRegistred;

    AccountManager accountManager;

    public static final String AUTHENTICATION = "authentication"; //action

    private ConnectionSuccessReceiver connectionSuccessReceiver = new ConnectionSuccessReceiver();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.authentification);

        accountManager = AccountManager.get(this);
        Account[] accounts = accountManager.getAccountsByType("login");

        if (accounts.length > 0) {
            //If there is an account
        } else {
            accountRegistred = false;
            editTextUsername = (EditText) findViewById(R.id.editText_login);
            editTextUsername.setVisibility(View.VISIBLE);
            editTextPassword = (EditText) findViewById(R.id.editText_password);
            editTextPassword.setVisibility(View.VISIBLE);
            buttonLogin = (Button) findViewById(R.id.button_connection);
            buttonLogin.setVisibility(View.VISIBLE);
            error = (TextView) findViewById(R.id.textView_error);
            register = (TextView) findViewById(R.id.textView_register);
            register.setVisibility(View.VISIBLE);
            spinner = (ProgressBar) findViewById(R.id.progressBar);

            buttonLogin.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //Here we start the service which will reach the server 
                    Intent i = new Intent(getApplicationContext(), AuthenticationService.class);
                    i.putExtra("username", editTextUsername.getText().toString());
                    i.putExtra("password", editTextPassword.getText().toString());
                    getApplication().startService(i);
                    spinner.setVisibility(View.VISIBLE);
                    error.setVisibility(View.INVISIBLE);
                }
            });

            register.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    startActivity(new Intent(AuthenticationActivity.this, RegisterActivity.class));
                }
            });
        }
        registerReceiver(connectionSuccessReceiver, new IntentFilter(AUTHENTICATION));
    }

    private class ConnectionSuccessReceiver extends BroadcastReceiver {
        //Called when the server returns success after authentication, we get the TOKEN here
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getStringExtra("STATE").equals("CONNECTED")) {
                Intent i = new Intent(AuthenticationActivity.this, MainActivity.class);
                i.putExtra("TOKEN", intent.getStringExtra("TOKEN"));
                startActivity(i);
            } else {
                spinner.setVisibility(View.INVISIBLE);
                error.setVisibility(View.VISIBLE);
            }
            finish();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(connectionSuccessReceiver);
    }
}

AuthenticatorService.java

public class AuthenticatorService extends Service {

    /**
     * The implementation of the class |AccountAuthenticatorImpl|.
     * It is implemented as a singleton
     */
    private static AccountAuthenticator accountAuthenticator = null;

    /**
     * The main constructor.
     */
    public AuthenticatorService() {
        super();
    }

    /**
     * The bind method of the service.
     * @param intent The intent used to invoke the service
     * @return The binder of the class which has implemented |AbstractAccountAuthenticator|
     */
    @Override
    public IBinder onBind(Intent intent) {
        IBinder ret = null;
        if (intent.getAction().equals(android.accounts.AccountManager.ACTION_AUTHENTICATOR_INTENT)) {
            ret = getAuthenticator().getIBinder();
        }
        return ret;
    }

    /**
     * The method used to obtain the authenticator. It is implemented as a singleton
     * @return The implementation of the class |AbstractAccountAuthenticator|
     */
    private AccountAuthenticator getAuthenticator() {
        if (AuthenticatorService.accountAuthenticator == null) {
            AuthenticatorService.accountAuthenticator = new AccountAuthenticator(this);
        }

        return AuthenticatorService.accountAuthenticator;
    }

    public class AccountAuthenticator extends AbstractAccountAuthenticator {
        private Context context;

        public AccountAuthenticator(Context context) {
            super(context);
            this.context = context;
        }

        @Override
        public Bundle editProperties(AccountAuthenticatorResponse accountAuthenticatorResponse, String s) {
            return null;
        }

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

            Bundle reply = new Bundle();

            Intent i = new Intent(context, AuthenticationActivity.class);
            i.setAction("com.readyo.app.authentication.addnewaccount");
            i.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
            i.putExtra("AuthTokenType", authTokenType);

            reply.putParcelable(AccountManager.KEY_INTENT, i);

            return reply;
        }

        @Override
        public Bundle confirmCredentials(AccountAuthenticatorResponse accountAuthenticatorResponse, Account account, Bundle bundle) throws NetworkErrorException {
            return null;
        }

        @Override
        public Bundle getAuthToken(AccountAuthenticatorResponse accountAuthenticatorResponse, Account account, String s, Bundle bundle) throws NetworkErrorException {
            return null;
        }

        @Override
        public String getAuthTokenLabel(String s) {
            return null;
        }

        @Override
        public Bundle updateCredentials(AccountAuthenticatorResponse accountAuthenticatorResponse, Account account, String s, Bundle bundle) throws NetworkErrorException {
            return null;
        }

        @Override
        public Bundle hasFeatures(AccountAuthenticatorResponse accountAuthenticatorResponse, Account account, String[] strings) throws NetworkErrorException {
            return null;
        }
    }
}

我还有通过HTTP到达服务器的代码，但我不确定它在这里是否重要。

感谢您的时间。

Answer 1

这是一个有点晚的回应，但也许这个样本可以帮助你： https ： //github.com/dawidgdanski/AccountAuthenticatorExample

我不久前创建了它，但注册/登录的逻辑可能会有所帮助

add an account if I never logged in before:

1. 如果您的应用程序流程要求用户登录以获取对数据的访问权限，则只需将LoginActivity声明为要显示的主要LoginActivity。

验证并验证用户凭据后，请调用AccountManager.addAccountExcplicitly（）方法。

2. 另一方面，如果您为匿名用户公开某些屏幕，那么在您提供登录/注册功能的应用程序部分（设置或其他）中，请调用AccountManager.addAccount（）。 此调用会激活您的AccountAuthenticator，以便在YourAccountAuthenticator.addAccount（）中处理您的请求，并可根据您的需要显示LoginActivity / SignUpActivity。

请记住，您也可以从“系统设置”中创建特定于应用程序的帐户。

    log automatically if my account exists

好吧，我不确定我是否理解你的要求。 一旦您将Account存储在AccountManager的元数据中，一旦您调用AccountManager.getAccountsByType（“my.account.type”），它就可用。 如果您想自动登录，那么您必须在某处存储您的凭据，这显然是在敏感数据泄露的威胁下。

 if the auto authentication doesn't work get a new token on the server

有一个AccountManager.invalidateAuthToken（）方法，它删除当前存储的authToken并调用另一个。

你可以启动示例应用程序，我认为它至少可以解决你的一些问题，因为它涵盖了以下逻辑：

• 登陆注册
• 身份验证令牌失效
• 显示当前记录的帐户
• 登出

干杯