AbstractAccountAuthenticator allow only 1 account












0














I have implemented AbstractAccountAuthenticator as a requirement to use SyncAdapter hower my application is supporting only 1 account at a time.



When the user is trying to add another account via settings - Settings crash with an error that it stopped working.



I have seen some application e.g. LinkedIn, Facebook they somehow handle it differently a toast message is shown to the user with a statement that only 1 account is supported. How can I achieve this functionality?



This is my authenticator



class ApplicationAuthenticator(private val context: Context) : AbstractAccountAuthenticator(context) {

// Editing properties is not supported
@Throws(UnsupportedOperationException::class)
override fun editProperties(response: AccountAuthenticatorResponse,
accountType: String): Bundle? {

throw UnsupportedOperationException()
}

// Don't add additional accounts
override fun addAccount(response: AccountAuthenticatorResponse, accountType: String,
authTokenType: String, features: Array<String>,
options: Bundle): Bundle? {

return bundleOf(AccountManager.KEY_INTENT to null)
}

// Ignore attempts to confirm credentials
@Throws(NetworkErrorException::class)
override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account,
options: Bundle): Bundle? {

return null
}

// Getting an authentication token is not supported
@Throws(NetworkErrorException::class, UnsupportedOperationException::class)
override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account,
authTokenType: String, loginOptions: Bundle): Bundle? {

throw UnsupportedOperationException()
}

// Getting a label for the auth token is not supported
override fun getAuthTokenLabel(authTokenType: String): String {
return context.resources.getString(R.string.application_name)
}

// Updating user credentials is not supported
override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account,
authTokenType: String, loginOptions: Bundle): Bundle? {

return null
}

// Checking features for the account is not supported
@Throws(NetworkErrorException::class)
override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account,
features: Array<String>): Bundle {

return bundleOf(KEY_BOOLEAN_RESULT to false)
}

}









share|improve this question



























    0














    I have implemented AbstractAccountAuthenticator as a requirement to use SyncAdapter hower my application is supporting only 1 account at a time.



    When the user is trying to add another account via settings - Settings crash with an error that it stopped working.



    I have seen some application e.g. LinkedIn, Facebook they somehow handle it differently a toast message is shown to the user with a statement that only 1 account is supported. How can I achieve this functionality?



    This is my authenticator



    class ApplicationAuthenticator(private val context: Context) : AbstractAccountAuthenticator(context) {

    // Editing properties is not supported
    @Throws(UnsupportedOperationException::class)
    override fun editProperties(response: AccountAuthenticatorResponse,
    accountType: String): Bundle? {

    throw UnsupportedOperationException()
    }

    // Don't add additional accounts
    override fun addAccount(response: AccountAuthenticatorResponse, accountType: String,
    authTokenType: String, features: Array<String>,
    options: Bundle): Bundle? {

    return bundleOf(AccountManager.KEY_INTENT to null)
    }

    // Ignore attempts to confirm credentials
    @Throws(NetworkErrorException::class)
    override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account,
    options: Bundle): Bundle? {

    return null
    }

    // Getting an authentication token is not supported
    @Throws(NetworkErrorException::class, UnsupportedOperationException::class)
    override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account,
    authTokenType: String, loginOptions: Bundle): Bundle? {

    throw UnsupportedOperationException()
    }

    // Getting a label for the auth token is not supported
    override fun getAuthTokenLabel(authTokenType: String): String {
    return context.resources.getString(R.string.application_name)
    }

    // Updating user credentials is not supported
    override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account,
    authTokenType: String, loginOptions: Bundle): Bundle? {

    return null
    }

    // Checking features for the account is not supported
    @Throws(NetworkErrorException::class)
    override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account,
    features: Array<String>): Bundle {

    return bundleOf(KEY_BOOLEAN_RESULT to false)
    }

    }









    share|improve this question

























      0












      0








      0







      I have implemented AbstractAccountAuthenticator as a requirement to use SyncAdapter hower my application is supporting only 1 account at a time.



      When the user is trying to add another account via settings - Settings crash with an error that it stopped working.



      I have seen some application e.g. LinkedIn, Facebook they somehow handle it differently a toast message is shown to the user with a statement that only 1 account is supported. How can I achieve this functionality?



      This is my authenticator



      class ApplicationAuthenticator(private val context: Context) : AbstractAccountAuthenticator(context) {

      // Editing properties is not supported
      @Throws(UnsupportedOperationException::class)
      override fun editProperties(response: AccountAuthenticatorResponse,
      accountType: String): Bundle? {

      throw UnsupportedOperationException()
      }

      // Don't add additional accounts
      override fun addAccount(response: AccountAuthenticatorResponse, accountType: String,
      authTokenType: String, features: Array<String>,
      options: Bundle): Bundle? {

      return bundleOf(AccountManager.KEY_INTENT to null)
      }

      // Ignore attempts to confirm credentials
      @Throws(NetworkErrorException::class)
      override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account,
      options: Bundle): Bundle? {

      return null
      }

      // Getting an authentication token is not supported
      @Throws(NetworkErrorException::class, UnsupportedOperationException::class)
      override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account,
      authTokenType: String, loginOptions: Bundle): Bundle? {

      throw UnsupportedOperationException()
      }

      // Getting a label for the auth token is not supported
      override fun getAuthTokenLabel(authTokenType: String): String {
      return context.resources.getString(R.string.application_name)
      }

      // Updating user credentials is not supported
      override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account,
      authTokenType: String, loginOptions: Bundle): Bundle? {

      return null
      }

      // Checking features for the account is not supported
      @Throws(NetworkErrorException::class)
      override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account,
      features: Array<String>): Bundle {

      return bundleOf(KEY_BOOLEAN_RESULT to false)
      }

      }









      share|improve this question













      I have implemented AbstractAccountAuthenticator as a requirement to use SyncAdapter hower my application is supporting only 1 account at a time.



      When the user is trying to add another account via settings - Settings crash with an error that it stopped working.



      I have seen some application e.g. LinkedIn, Facebook they somehow handle it differently a toast message is shown to the user with a statement that only 1 account is supported. How can I achieve this functionality?



      This is my authenticator



      class ApplicationAuthenticator(private val context: Context) : AbstractAccountAuthenticator(context) {

      // Editing properties is not supported
      @Throws(UnsupportedOperationException::class)
      override fun editProperties(response: AccountAuthenticatorResponse,
      accountType: String): Bundle? {

      throw UnsupportedOperationException()
      }

      // Don't add additional accounts
      override fun addAccount(response: AccountAuthenticatorResponse, accountType: String,
      authTokenType: String, features: Array<String>,
      options: Bundle): Bundle? {

      return bundleOf(AccountManager.KEY_INTENT to null)
      }

      // Ignore attempts to confirm credentials
      @Throws(NetworkErrorException::class)
      override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account,
      options: Bundle): Bundle? {

      return null
      }

      // Getting an authentication token is not supported
      @Throws(NetworkErrorException::class, UnsupportedOperationException::class)
      override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account,
      authTokenType: String, loginOptions: Bundle): Bundle? {

      throw UnsupportedOperationException()
      }

      // Getting a label for the auth token is not supported
      override fun getAuthTokenLabel(authTokenType: String): String {
      return context.resources.getString(R.string.application_name)
      }

      // Updating user credentials is not supported
      override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account,
      authTokenType: String, loginOptions: Bundle): Bundle? {

      return null
      }

      // Checking features for the account is not supported
      @Throws(NetworkErrorException::class)
      override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account,
      features: Array<String>): Bundle {

      return bundleOf(KEY_BOOLEAN_RESULT to false)
      }

      }






      android android-syncadapter android-authenticator






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      asked Nov 19 '18 at 12:40









      antanas_sepikas

      1,73921740




      1,73921740
























          1 Answer
          1






          active

          oldest

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          0














          When the user clicks the "Add Account" button, Android just calls the addAccount method of your ApplicationAuthenticator. In return it expects either the account to be created, an Intent which launches the account setup or an error.



          If you don't allow multiple accounts you have multiple options here:




          • Return an error with code ERROR_CODE_UNSUPPORTED_OPERATION. Although I've not tried that yet.


          • Return your existing account as the result. At this point you can also show a Toast.



            To Return the existing account just let addAccount return a Bundle with the following keys and their respective values:




            AccountManager.KEY_ACCOUNT_NAME and AccountManager.KEY_ACCOUNT_TYPE of the account that was added, or





          • Return an Activity Intent which doesn't create an account but explains to the user that this is an unsupported/unnecessary operation. It's not a requirement that the Activity actually adds an account.



            This gives the best user experience IMO.








          share|improve this answer























          • But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
            – antanas_sepikas
            Nov 29 '18 at 6:23










          • I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
            – Marten
            Nov 29 '18 at 9:27











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          1 Answer
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          active

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          active

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          0














          When the user clicks the "Add Account" button, Android just calls the addAccount method of your ApplicationAuthenticator. In return it expects either the account to be created, an Intent which launches the account setup or an error.



          If you don't allow multiple accounts you have multiple options here:




          • Return an error with code ERROR_CODE_UNSUPPORTED_OPERATION. Although I've not tried that yet.


          • Return your existing account as the result. At this point you can also show a Toast.



            To Return the existing account just let addAccount return a Bundle with the following keys and their respective values:




            AccountManager.KEY_ACCOUNT_NAME and AccountManager.KEY_ACCOUNT_TYPE of the account that was added, or





          • Return an Activity Intent which doesn't create an account but explains to the user that this is an unsupported/unnecessary operation. It's not a requirement that the Activity actually adds an account.



            This gives the best user experience IMO.








          share|improve this answer























          • But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
            – antanas_sepikas
            Nov 29 '18 at 6:23










          • I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
            – Marten
            Nov 29 '18 at 9:27
















          0














          When the user clicks the "Add Account" button, Android just calls the addAccount method of your ApplicationAuthenticator. In return it expects either the account to be created, an Intent which launches the account setup or an error.



          If you don't allow multiple accounts you have multiple options here:




          • Return an error with code ERROR_CODE_UNSUPPORTED_OPERATION. Although I've not tried that yet.


          • Return your existing account as the result. At this point you can also show a Toast.



            To Return the existing account just let addAccount return a Bundle with the following keys and their respective values:




            AccountManager.KEY_ACCOUNT_NAME and AccountManager.KEY_ACCOUNT_TYPE of the account that was added, or





          • Return an Activity Intent which doesn't create an account but explains to the user that this is an unsupported/unnecessary operation. It's not a requirement that the Activity actually adds an account.



            This gives the best user experience IMO.








          share|improve this answer























          • But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
            – antanas_sepikas
            Nov 29 '18 at 6:23










          • I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
            – Marten
            Nov 29 '18 at 9:27














          0












          0








          0






          When the user clicks the "Add Account" button, Android just calls the addAccount method of your ApplicationAuthenticator. In return it expects either the account to be created, an Intent which launches the account setup or an error.



          If you don't allow multiple accounts you have multiple options here:




          • Return an error with code ERROR_CODE_UNSUPPORTED_OPERATION. Although I've not tried that yet.


          • Return your existing account as the result. At this point you can also show a Toast.



            To Return the existing account just let addAccount return a Bundle with the following keys and their respective values:




            AccountManager.KEY_ACCOUNT_NAME and AccountManager.KEY_ACCOUNT_TYPE of the account that was added, or





          • Return an Activity Intent which doesn't create an account but explains to the user that this is an unsupported/unnecessary operation. It's not a requirement that the Activity actually adds an account.



            This gives the best user experience IMO.








          share|improve this answer














          When the user clicks the "Add Account" button, Android just calls the addAccount method of your ApplicationAuthenticator. In return it expects either the account to be created, an Intent which launches the account setup or an error.



          If you don't allow multiple accounts you have multiple options here:




          • Return an error with code ERROR_CODE_UNSUPPORTED_OPERATION. Although I've not tried that yet.


          • Return your existing account as the result. At this point you can also show a Toast.



            To Return the existing account just let addAccount return a Bundle with the following keys and their respective values:




            AccountManager.KEY_ACCOUNT_NAME and AccountManager.KEY_ACCOUNT_TYPE of the account that was added, or





          • Return an Activity Intent which doesn't create an account but explains to the user that this is an unsupported/unnecessary operation. It's not a requirement that the Activity actually adds an account.



            This gives the best user experience IMO.









          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 29 '18 at 9:26

























          answered Nov 29 '18 at 5:41









          Marten

          3,0041822




          3,0041822












          • But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
            – antanas_sepikas
            Nov 29 '18 at 6:23










          • I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
            – Marten
            Nov 29 '18 at 9:27


















          • But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
            – antanas_sepikas
            Nov 29 '18 at 6:23










          • I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
            – Marten
            Nov 29 '18 at 9:27
















          But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
          – antanas_sepikas
          Nov 29 '18 at 6:23




          But how do I return the existing account as a result, do I need to implement AccountAuthenticatorActivity or can I just simple return that results directly from Authenticator?
          – antanas_sepikas
          Nov 29 '18 at 6:23












          I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
          – Marten
          Nov 29 '18 at 9:27




          I've updated the answer. Also make sure to remove KEY_INTENT from your bundle if you return the account instead.
          – Marten
          Nov 29 '18 at 9:27


















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