<div id="readability-page-1" class="page"><div>
												<h2>안드로이드 앱에서 구글 로그인 연동하기</h2>
<p><a href="https://velog.io/@duridudu/%EC%9D%BC%EC%9D%BC%EC%9D%B4-androidkotlin-%EA%B5%AC%EA%B8%80-%EB%A1%9C%EA%B7%B8%EC%9D%B8-%EC%97%B0%EB%8F%99%ED%95%98%EA%B8%B0">참조</a></p>
<h2>Google Firebase Console</h2>
<p><a href="https://console.firebase.google.com/">https://console.firebase.google.com/</a></p>
<p>프로젝트 설정 &gt; 일반 &gt; SHA-1 설정 (내 프로젝트의 SHA-1 가져와서 저장)</p>
<p><a href="https://holika.tistory.com/entry/Android-%ED%8C%81-SHA1-SHA-256-%ED%99%95%EC%9D%B8%ED%95%98%EB%8A%94-%EB%B2%95%EA%B3%BC-signingReport-gradle%EC%9D%B4-%EC%97%86%EC%9D%84-%EB%95%8C-%ED%95%B4%EA%B2%B0-%EB%B0%A9%EB%B2%95">SHA1, SHA-256 확인하는 법과 signingReport gradle이 없을 때 해결 방법</a></p>
<p>Authentication &gt; Google 로그인 추가 설정</p>
<p><a href="https://www.skyer9.pe.kr/wordpress/wp-content/uploads/2024/12/2024-12-19-01.png"><img decoding="async" src="https://www.skyer9.pe.kr/wordpress/wp-content/uploads/2024/12/2024-12-19-01.png" alt=""></a></p>
<p>google-services.json 에 아래와 같은 내용이 있어야 한다.</p>
<pre><code>      "oauth_client": [
        {
          "client_id": "XXXXXXXXXXXXX.apps.googleusercontent.com",
          "client_type": 1,
          "android_info": {
            "package_name": "XXXXXXXXXXX",
            "certificate_hash": "XXXXXXXXXXXXXX"
          }
        },
        {
          "client_id": "XXXXXXXXXXXXXX.apps.googleusercontent.com",
          "client_type": 3
        }
      ],</code></pre>
<p>최신 버전의 google-services.json을 app 폴더에 갱신</p>
<h2>Google Cloud Console</h2>
<p><a href="https://console.cloud.google.com/apis/">https://console.cloud.google.com/apis/</a></p>
<p>OAuth 동의 화면 작성<br>
OAuth 2.0 클라이언트 ID 추가<br>
(웹 애플리케이션 O)<br>
(android X)</p>
<p>왠지… <code>Authentication &gt; Google 로그인 추가 설정</code> 부분이 이걸 한 후에 해야 할듯…</p>
<h2>앱 단위 gradle</h2>
<pre><code>plugins {
    // ......
    id("com.google.gms.google-services")
}

dependencies {
    // ......
    implementation "androidx.credentials:credentials:1.3.0"
    implementation "androidx.credentials:credentials-play-services-auth:1.3.0"
    implementation libs.googleid

    implementation 'com.google.gms:google-services:4.4.2'
    implementation 'com.google.firebase:firebase-auth:23.1.0'
    implementation platform('com.google.firebase:firebase-bom:32.0.0')
    implementation 'com.google.android.gms:play-services-auth:21.3.0'
}</code></pre>
<h2>프로젝트 단위 gradle</h2>
<pre><code>buildscript {
    repositories {
        google()
        mavenCentral()
    }
}

plugins {
    alias(libs.plugins.android.application) apply false
    id("com.google.gms.google-services") version "4.4.2" apply false
}</code></pre>
<h2>코드 작성</h2>
<pre><code>    private void setupLogin() {
        credentialManager = CredentialManager.create(this);
        findViewById(R.id.sign_in_button).setOnClickListener(v -&gt; signIn());
    }

    private void signIn() {
        GetCredentialRequest request = new GetCredentialRequest.Builder()
                .addCredentialOption(new GetGoogleIdOption.Builder()
                        .setServerClientId(getString(R.string.default_web_client_id))
                        .build())
                .build();

        credentialManager.getCredential(
                this,
                request,
                new Continuation&lt;GetCredentialResponse&gt;() {
                    @NonNull
                    @Override
                    public CoroutineContext getContext() {
                        return EmptyCoroutineContext.INSTANCE;
                    }

                    @Override
                    public void resumeWith(@NonNull Object result) {
                        try {
                            if (result instanceof GetCredentialResponse) {
                                GetCredentialResponse response = (GetCredentialResponse) result;
                                if (response.getCredential() instanceof GoogleIdTokenCredential) {
                                    GoogleIdTokenCredential credential =
                                            (GoogleIdTokenCredential) response.getCredential();
                                    String idToken = credential.getIdToken();
                                    String id = credential.getId();

                                    runOnUiThread(() -&gt; {
                                        Log.d(TAG, "ID Token: " + idToken);
                                        Log.d(TAG, "Email: " + id);
                                        Toast.makeText(MainActivity.this,
                                                "Google Sign-In Successful\nEmail: " + id,
                                                Toast.LENGTH_SHORT).show();
                                    });
                                }
                            }
                        } catch (Exception e) {
                            runOnUiThread(() -&gt; {
                                Log.e(TAG, "Google Sign-In Failed: " + e.getMessage());
                                Toast.makeText(MainActivity.this, "Google Sign-In Failed",
                                        Toast.LENGTH_SHORT).show();
                            });
                        }
                    }
                }
        );
    }</code></pre>
<p>정상적으로 설정이 된 경우, R.string.default_web_client_id 가 오류없이 인식된다.</p>
<p><span></span> <span>Post Views:</span> <span>8</span>
			</p>											</div></div>

상구리의 기술 블로그

안드로이드 앱에서 구글 로그인 연동하기
참조
Google Firebase Console
https://console.firebase.google.com/
프로젝트 설정 > 일반 > SHA-1 설정 (내 프로젝트의 SHA-1 가져와서 저장)
SHA1, SHA-256 확인하는 법과 signingReport gradle이 없을 때 해결 방법
Authentication > Google 로그인 추가 설정
google-services.json 에 아래와 같은 내용이 있어야 한다.
      "oauth_client": [
        {
          "client_id": "XXXXXXXXXXXXX.apps.googleusercontent.com",
          "client_type": 1,
          "android_info": {
            "package_name": "XXXXXXXXXXX",
            "certificate_hash": "XXXXXXXXXXXXXX"
          }
        },
        {
          "client_id": "XXXXXXXXXXXXXX.apps.googleusercontent.com",
          "client_type": 3
        }
      ],
최신 버전의 google-services.json을 app 폴더에 갱신
Google Cloud Console
https://console.cloud.google.com/apis/
OAuth 동의 화면 작성
왠지… Authentication > Google 로그인 추가 설정 부분이 이걸 한 후에 해야 할듯…
앱 단위 gradle
plugins {
    // ......
    id("com.google.gms.google-services")
}
dependencies {
    // ......
    implementation "androidx.credentials:credentials:1.3.0"
    implementation "androidx.credentials:credentials-play-services-auth:1.3.0"
    implementation libs.googleid
    implementation 'com.google.gms:google-services:4.4.2'
    implementation 'com.google.firebase:firebase-auth:23.1.0'
    implementation platform('com.google.firebase:firebase-bom:32.0.0')
    implementation 'com.google.android.gms:play-services-auth:21.3.0'
}
프로젝트 단위 gradle
buildscript {
    repositories {
        google()
        mavenCentral()
    }
}
plugins {
    alias(libs.plugins.android.application) apply false
    id("com.google.gms.google-services") version "4.4.2" apply false
}
코드 작성
    private void setupLogin() {
        credentialManager = CredentialManager.create(this);
        findViewById(R.id.sign_in_button).setOnClickListener(v -> signIn());
    }
    private void signIn() {
        GetCredentialRequest request = new GetCredentialRequest.Builder()
                .addCredentialOption(new GetGoogleIdOption.Builder()
                        .setServerClientId(getString(R.string.default_web_client_id))
                        .build())
                .build();
        credentialManager.getCredential(
                this,
                request,
                new Continuation<GetCredentialResponse>() {
                    @NonNull
                    @Override
                    public CoroutineContext getContext() {
                        return EmptyCoroutineContext.INSTANCE;
                    }
                    @Override
                    public void resumeWith(@NonNull Object result) {
                        try {
                            if (result instanceof GetCredentialResponse) {
                                GetCredentialResponse response = (GetCredentialResponse) result;
                                if (response.getCredential() instanceof GoogleIdTokenCredential) {
                                    GoogleIdTokenCredential credential =
                                            (GoogleIdTokenCredential) response.getCredential();
                                    String idToken = credential.getIdToken();
                                    String id = credential.getId();
                                    runOnUiThread(() -> {
                                        Log.d(TAG, "ID Token: " + idToken);
                                        Log.d(TAG, "Email: " + id);
                                        Toast.makeText(MainActivity.this,
                                                "Google Sign-In Successful\nEmail: " + id,
                                                Toast.LENGTH_SHORT).show();
                                    });
                                }
                            }
                        } catch (Exception e) {
                            runOnUiThread(() -> {
                                Log.e(TAG, "Google Sign-In Failed: " + e.getMessage());
                                Toast.makeText(MainActivity.this, "Google Sign-In Failed",
                                        Toast.LENGTH_SHORT).show();
                            });
                        }
                    }
                }
        );
    }
정상적으로 설정이 된 경우, R.string.default_web_client_id 가 오류없이 인식된다.

안드로이드 앱에서 구글 로그인 연동하기

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