카카오 클래스를 찾지 못했다라는 에러가 나옵니다

Android
1

정상적으로 사용하던 소스 였고 , 수정한적이 없는 부분인데

단순히 바꾼 부분이라면 소스를 바꾼것이 아니고 테스트 단말기를 안드로이드 5.0 에서
안드로이드 7.0 으로 바꿔서 테스트를 하자 발생이 됩니다 .

로그는 아래와 같습니다

05-16 20:15:11.389 20998-20998/com.voltsoft.edu.engword E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.voltsoft.edu.engword, PID: 20998
java.lang.RuntimeException: Unable to create application com.voltsoft.edu.engword.ApplicationEngWord: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.kakao.d.a.APILevel21Compatibility
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5584)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1596)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6316)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.kakao.d.a.APILevel21Compatibility
at com.kakao.d.a.a.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.o.a(Unknown Source)
at com.voltsoft.edu.engword.ApplicationEngWord.onCreate(Unknown Source)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5581)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1596)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6316)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
Caused by: java.lang.ClassNotFoundException: com.kakao.d.a.APILevel21Compatibility
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:400)
at java.lang.Class.forName(Class.java:326)
at com.kakao.d.a.a.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.o.a(Unknown Source)
at com.voltsoft.edu.engword.ApplicationEngWord.onCreate(Unknown Source)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5581)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1596)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6316)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
Caused by: java.lang.ClassNotFoundException: Didn’t find class “com.kakao.d.a.APILevel21Compatibility” on path: DexPathList[[zip file “/data/app/com.voltsoft.edu.engword-1/base.apk”],nativeLibraryDirectories=[/data/app/com.voltsoft.edu.engword-1/lib/arm64, /system/fake-libs64, /data/app/com.voltsoft.edu.engword-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:400)
at java.lang.Class.forName(Class.java:326)
at com.kakao.d.a.a.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.t.(Unknown Source)
at com.kakao.a.t.a(Unknown Source)
at com.kakao.a.o.a(Unknown Source)
at com.voltsoft.edu.engword.ApplicationEngWord.onCreate(Unknown Source)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5581)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1596)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6316)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)

2

재현이 되지 않아서 그런데, compileSdkVersion과 targetSdkVersion이 어떻게 되나요?

3

프로가드 적용 관련 문제인 것 같네요.

https://developers.kakao.com/docs/android#시작하기-앱-생성

-keep class com.kakao.** { *; }
-keepattributes Signature
-keepclassmembers class * {
  public static <fields>;
  public *;
}
-dontwarn android.support.v4.**,org.slf4j.**,com.google.android.gms.**

위 링크에 나와있는데로 카카오 클래스들은 프로가드에서 제외해보시겠어요?