[Android] 카카오 로그인 시 에러

Android 에서 카카오 로그인 연동 시 하기와 같이 에러 발생하면서 로그인이 불가능한 상태가 발생한다.

 

2021-09-23 11:00:36.327 4851-4851/? E/AndroidRuntime: FATAL EXCEPTION: main

    Process: kr.co.test, PID: 4851

    java.lang.RuntimeException: Unable to create application kr.co.test.utils.GlobalApplication: java.lang.NullPointerException: Argument 'cacheName' cannot be null

        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7540)

        at android.app.ActivityThread.access$1500(ActivityThread.java:301)

        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2158)

        at android.os.Handler.dispatchMessage(Handler.java:106)

        at android.os.Looper.loop(Looper.java:246)

        at android.app.ActivityThread.main(ActivityThread.java:8595)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

     Caused by: java.lang.NullPointerException: Argument 'cacheName' cannot be null

        at com.kakao.util.helper.Utility.notNull(Utility.java:97)

        at com.kakao.util.helper.SharedPreferencesCache.<init>(SharedPreferencesCache.java:82)

        at com.kakao.auth.Session.<init>(Session.java:145)

        at com.kakao.auth.Session.initialize(Session.java:101)

        at com.kakao.auth.KakaoSDK.init(KakaoSDK.java:101)

        at kr.co.test.utils.GlobalApplication.onCreate(GlobalApplication.java:30)

        at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1192)

        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7535)

        at android.app.ActivityThread.access$1500(ActivityThread.java:301) 

        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2158) 

        at android.os.Handler.dispatchMessage(Handler.java:106) 

        at android.os.Looper.loop(Looper.java:246) 

        at android.app.ActivityThread.main(ActivityThread.java:8595) 

        at java.lang.reflect.Method.invoke(Native Method) 

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) 

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130) 

 

해당 현상은 AppKey가 등록이 안되서 발생하는 것입니다.

 

AndroidManifest.xml 에 하기와 같이 네이티브 앱키 등록

<?xml version="1.0" encoding="utf-8"?>
<manifest>

    <uses-permission android:name="android.permission.INTERNET" />
    
	<application
    	...
        <meta-data android:name="com.kakao.sdk.AppKey" android:value="8986a97c6664ef9f2c..."/>
    </application>
</manifest>