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Kakao Sync
Auto-login from Kakao Talk
This document contains how to implement the Auto-login function using the Legacy SDK for Android and iOS. The latest SDK does not support this function.
For more details, refer to Concepts.
Legacy Android
For Auto-login, add auto_login to extraParams, and set it to true. The auto_login parameter should be Map type, and use the constants only supported by com.kakao.auth.StringSet as values.
Set AuthType to KAKAO_TALK_ONLY because Auto-login only works from the Kakao Talk in-app browser.
If a user successfully logs in, the user is redirected to a service page in a logged-in state.
import com.kakao.auth.StringSet;
public class SampleLoginActivity extends BaseActivity {
private SessionCallback callback;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sample_login);
callback = new SessionCallback();
Session.getCurrentSession().addCallback(callback); // Add callback
Map<String, String> extraParams = new HashMap<>();
extraParams.put(StringSet.auto_login, "true");
Session.getCurrentSession().open(AuthType.KAKAO_TALK_ONLY, this, extraParams); // Pass KAKAO_TALK_ONLY as a parameter. Otherwise, the webView login is executed if Kakao Talk has not installed.
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (Session.getCurrentSession().handleActivityResult(requestCode, resultCode, data)) {
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onDestroy() {
super.onDestroy();
Session.getCurrentSession().removeCallback(callback); // Remove callback
}
private class SessionCallback implements ISessionCallback {
@Override
public void onSessionOpened() {
// Login success
}
@Override
public void onSessionOpenFailed(KakaoException exception) {
// Login fail
}
}
}
Legacy iOS
To use the Auto-login feature, you need to call canOpenURL that checks if Kakao Talk has been installed, and set authType to KOAuthType.talk. After that, pass KOSessionAutoLoginParameterKey as parameters.
// Check if Kakao Talk has been installed
if UIApplication.shared.canOpenURL(URL(string: "kakaokompassauth://")!) {
// For Auto-login, add `KOSessionAutoLoginParameterKey`
let parameters = [KOSessionAutoLoginParameterKey: "true"]
// Simple login without a dialog to choose a login method
let authTypes = [NSNumber(value: KOAuthType.talk.rawValue)]
// Proceed login
KOSession.shared()?.open(completionHandler: { (error) in
if error != nil {
// Change to a logged-in state
} else {
// If login fails or other error occurs, Auto-login is not available.
}
}, parameters: parameters, authTypes: authTypes)
} else {
// If Kakao Talk has not been installed, Auto-login is not available.
}
Considering the Auto-login is only available in the Kakao Talk in-app browser, you need to handle an error exception by showing the user the service page in a logged-out state if Kakao Talk has not been installed on the user's device. There is also the error exception that a user has not yet signed up for KaKao Talk. In this situation, you need to handle the expectation as you would a logged-out state.