誰和什麼時候應該調用基於AbstractAccountAuthenticator的類的方法confirmCredentials？

Question

我不明白方法confirmCredentials是如何工作的。我從來沒有在Android UI中看到任何選項，比如「Confirm Credentials」等，只有「Create account」和「Remove account」。

Answer 1

如果您想要將設備上的Gmail帳戶用作驗證方法，請使用它。 NFCSecure在您打開應用程序時使用它，強制您使用Gmail登錄。

public void verifyAuth(Bundle b) throws IllegalArgumentException { 
    accountManager.confirmCredentials(getImportantAccount(importantEmail), b, (Activity) c, new OnConfirmed(), null); 
} 


public void attemptLogin() { 
    mEmailView.setError(null); 
    mPasswordView.setError(null); 

    mEmail = mEmailView.getText().toString(); 
    mPassword = mPasswordView.getText().toString(); 

    boolean cancel = false; 
    View focusView = null; 

    if (TextUtils.isEmpty(mPassword)) { 
     mPasswordView.setError(getString(R.string.error_field_required)); 
     focusView = mPasswordView; 
     cancel = true; 
    } else if (mPassword.length() < 4) { 
     mPasswordView.setError(getString(R.string.error_invalid_password)); 
     focusView = mPasswordView; 
     cancel = true; 
    } 

    if (TextUtils.isEmpty(mEmail)) { 
     mEmailView.setError(getString(R.string.error_field_required)); 
     focusView = mEmailView; 
     cancel = true; 
    } else if (!mEmail.contains("@")) { 
     mEmailView.setError(getString(R.string.error_invalid_email)); 
     focusView = mEmailView; 
     cancel = true; 
    } 

    if (cancel) { 
     focusView.requestFocus(); 
    } else { 
     mLoginStatusMessageView.setText(R.string.login_progress_signing_in); 
     showProgress(true); 
     gAuth = new GoogleAuthentication(ctx, mEmailView.getText().toString()); 
     gAuth.setUserConfirmedListener(SettingsUnlockActivity.this); 

     Bundle b = new Bundle(); 
     b.putString(AccountManager.KEY_PASSWORD, mPasswordView.getText().toString()); 
     try { 
      gAuth.verifyAuth(b); 
     } catch (IllegalArgumentException e) { 
      doUnSuccessfulLogin(); 
     } 
    } 
}