Legacy Android(java) 카카오 로그인 예제

developers.kakao.com/docs/latest/ko/getting-started/sdk-android-v1

Kakao Developers

buld.gradle(Project)

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.2"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven{
            url "https://maven.google.com"
        }
        /*카카오*/
        maven { url 'https://devrepo.kakao.com/nexus/content/groups/public/' }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

build.gradle(Module)

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.3.0'
    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'

    // 카카오 로그인
    implementation group: 'com.kakao.sdk', name: 'usermgmt', version: '1.30.6'
    // 카카오톡
    implementation group: 'com.kakao.sdk', name: 'kakaotalk', version: '1.30.6'
    // 카카오스토리
    implementation group: 'com.kakao.sdk', name: 'kakaostory', version: '1.30.6'
    // 카카오링크
    implementation group: 'com.kakao.sdk', name: 'kakaolink', version: '1.30.6'
    // 카카오내비
    implementation group: 'com.kakao.sdk', name: 'kakaonavi', version: '1.30.6'
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <com.kakao.usermgmt.LoginButton
        android:id="@+id/login_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginBottom="30dp" />
</LinearLayout>

MainActivity.java

package com.example.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import com.kakao.auth.ISessionCallback;
import com.kakao.auth.Session;
import com.kakao.util.exception.KakaoException;

public class MainActivity extends AppCompatActivity {

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

        // 세션 콜백 등록
        Session.getCurrentSession().addCallback(sessionCallback);
    }

    // 세션 콜백 구현
    private ISessionCallback sessionCallback = new ISessionCallback() {
        @Override
        public void onSessionOpened() {
            Log.i("KAKAO_SESSION", "로그인 성공");
        }

        @Override
        public void onSessionOpenFailed(KakaoException exception) {
            Log.e("KAKAO_SESSION", "로그인 실패", exception);
        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();

        // 세션 콜백 삭제
        Session.getCurrentSession().removeCallback(sessionCallback);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        // 카카오톡|스토리 간편로그인 실행 결과를 받아서 SDK로 전달
        if (Session.getCurrentSession().handleActivityResult(requestCode, resultCode, data)) {
            return;
        }

        super.onActivityResult(requestCode, resultCode, data);
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:name=".GlobalApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyApplication">

        <meta-data
            android:name="com.kakao.sdk.AppKey"
            android:value="@string/kakao_app_key" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>