了解自定义帐户身份验证

以下示例是关键概念和基本骨架设置的高级别覆盖： -

1. 从用户收集凭据（通常来自你创建的登录屏幕）
2. 使用服务器验证凭据（存储自定义身份验证）
3. 在设备上存储凭据

扩展 AbstractAccountAuthenticator （主要用于检索身份验证并重新验证它们）

public class AccountAuthenticator extends AbstractAccountAuthenticator {

  @Override
  public Bundle addAccount(AccountAuthenticatorResponse response, String accountType,
      String authTokenType, String[] requiredFeatures, Bundle options) {
    //intent to start the login activity
  }

  @Override
  public Bundle confirmCredentials(AccountAuthenticatorResponse response, Account account, Bundle options) {
  }

  @Override
  public Bundle editProperties(AccountAuthenticatorResponse response, String accountType) {
  }

  @Override
  public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType,
      Bundle options) throws NetworkErrorException {
    //retrieve authentication tokens from account manager storage or custom storage or re-authenticate old tokens and return new ones
  }

  @Override
  public String getAuthTokenLabel(String authTokenType) {
  }

  @Override
  public Bundle hasFeatures(AccountAuthenticatorResponse response, Account account, String[] features)
      throws NetworkErrorException {
    //check whether the account supports certain features
  }

  @Override
  public Bundle updateCredentials(AccountAuthenticatorResponse response, Account account, String authTokenType,
      Bundle options) {
    //when the user's session has expired or requires their previously available credentials to be updated, here is the function to do it.
  }
}

创建服务 （Account Manager 框架通过服务接口连接到扩展的 AbstractAccountAuthenticator）

public class AuthenticatorService extends Service {

    private AccountAuthenticator authenticator;

    @Override
    public void onCreate(){
        authenticator = new AccountAuthenticator(this);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return authenticator.getIBinder();
    }
}

Authenticator XML 配置 （帐户管理器框架需要。这是你在设置 - > Android 帐户中看到的内容）

<account-authenticator xmlns:android="http://schemas.android.com/apk/res/android"
    android:accountType="rename.with.your.applicationid"
    android:icon="@drawable/app_icon"
    android:label="@string/app_name"
    android:smallIcon="@drawable/app_icon" />

对 AndroidManifest.xml 的更改 （将所有上述概念放在一起，使其可通过 AccountManager 以编程方式使用）

<application
...>
    <service
        android:name=".authenticator.AccountAuthenticatorService"
        android:exported="false"
        android:process=":authentication">
        <intent-filter>
            <action android:name="android.accounts.AccountAuthenticator"/>
        </intent-filter>
        <meta-data
            android:name="android.accounts.AccountAuthenticator"
            android:resource="@xml/authenticator"/>
    </service>
</application>

下一个示例将包含如何使用此设置。