안드로이드 파이어베이스 구글아이디 연동

그래들

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

dependencies {
    implementation platform('com.google.firebase:firebase-bom:26.2.0')
    implementation 'com.google.android.gms:play-services-auth:19.0.0'
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-core:18.0.0'
    implementation 'com.google.firebase:firebase-auth:20.0.1'
    implementation 'com.firebaseui:firebase-ui-auth:7.1.1'
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}

여러 구글 설정을 거친 뒤, 파이어베이스 코어를 implements해준다.

 

// 메인 액티비티 xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="276dp"
        android:text="헬로우 월드"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.gms.common.SignInButton
        android:layout_width="181dp"
        android:layout_height="62dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2"
        app:layout_constraintVertical_bias="0.182" />

</androidx.constraintlayout.widget.ConstraintLayout>

// 결과 액티비티 xml



<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="276dp"
        android:text="헬로우 월드"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.gms.common.SignInButton
        android:id="@+id/google_btn"
        android:layout_width="181dp"
        android:layout_height="62dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2"
        app:layout_constraintVertical_bias="0.182" />

</androidx.constraintlayout.widget.ConstraintLayout>

//메인 엑티비티 java


package com.gohool.idontknow;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.GoogleAuthProvider;

public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {


    private SignInButton google_btn; //구글 로그인 버튼
    private FirebaseAuth firebaseAuth; //파이어베이스 인증관련 객체
    private GoogleApiClient googleApiClient;// 구글 API클라이언트 객체
    private static final int REQ_SIGN_GOOGLE = 100; //구글 로그인 결과 코드



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //구글 signIn버튼 기본 옵션 정리(세팅)
        GoogleSignInOptions googleSignInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(getString(R.string.default_web_client_id))
                .requestEmail()
                .build();

        googleApiClient = new GoogleApiClient.Builder(this) //fragment라면 getContext로
                .enableAutoManage(this,this)
                .addApi(Auth.GOOGLE_SIGN_IN_API,googleSignInOptions)
                .build();

        firebaseAuth = FirebaseAuth.getInstance(); //파이어베이스 인증 객체 초기화



        google_btn = findViewById(R.id.google_btn);
        google_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient); //구글이 제공하는 intent 메소드
                startActivityForResult(intent,REQ_SIGN_GOOGLE); //인증받고 다시 돌아옴

            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { //구글 로그인 인증 요청시, 결과값 반환
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == REQ_SIGN_GOOGLE){
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            if(result.isSuccess()){
                GoogleSignInAccount account = result.getSignInAccount();  //사용자 정보 담고 있음
                resultLogin(account); //로그인 결과값 출력 수행하라는 메소드
            }
        }
    }

    private void resultLogin(GoogleSignInAccount account) {
        AuthCredential credential = GoogleAuthProvider.getCredential(account.getIdToken(),null);
        firebaseAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        //최종적으로 로그인 성공 됐냐.
                        if(task.isSuccessful()){
                            Toast.makeText(MainActivity.this, "로그인 성공!", Toast.LENGTH_SHORT).show();
                            Intent intent = new Intent(getApplicationContext(),ResultActivity.class);
                            intent.putExtra("nickname", account.getDisplayName()); //account안에 들어있는 이름가져오기
                            intent.putExtra("photoUrl",String.valueOf(account.getPhotoUrl())); //사진은 스트링으로 변환해줘야함
                            startActivity(intent);
                        }else {
                            Toast.makeText(MainActivity.this, "로그인 실패ㅠ", Toast.LENGTH_SHORT).show();
                        }
                    }
                });
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }

}

// 결과 액티비티 . java

package com.gohool.idontknow;

import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.bumptech.glide.Glide;

public class ResultActivity extends AppCompatActivity {

    private TextView tv_result; //닉네임
    private ImageView tv_profile; //이미지

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);

        Intent intent = getIntent();
        String nickname = intent.getStringExtra("nickname"); //키값
        String photoUrl = intent.getStringExtra("photoUrl");


        tv_result = findViewById(R.id.textView);
        tv_result.setText(nickname);

        tv_profile = findViewById(R.id.ic_profile);
        Glide.with(this).load(photoUrl).into(tv_profile);// 프로필 url을 이미지 뷰에 세팅.

    }
}

1.파이어베이스에 인증은 됐지만, 결과 액티비티로 넘어가지 않았다.

문제는 textView의 id값을 넘겼어야했는데, Layout의 id를 넘겨주고있었다. 어쩐지.. .ㅠ

 

 

파이어베이스 인증과 + 로그인 회원 가입 만들기