안드로이드 스튜디오 String array in service NullpointerExeption error

Question

브로드캐스트 리시버로 서비스를 실행시키는 동시에 Stirng 배열을 서비스액티비티로 넘겨주려고 합니다.

그런데 넘기고 실행시키고 나면 밑에 에러가 납니다ㅜㅜ 뭐가 문제인지 아무리 고쳐봐도 해결이 안됩니다 도와주세요ㅜㅜ

05-24 08:03:42.604 13659-13659/com.example.securityapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.securityapp, PID: 13659
    java.lang.RuntimeException: Unable to start service com.example.securityapp.LocationTrackerService@1f09dc66 with null: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] android.content.Intent.getStringArrayExtra(java.lang.String)' on a null object reference
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2911)
        at android.app.ActivityThread.access$2100(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] android.content.Intent.getStringArrayExtra(java.lang.String)' on a null object reference
        at com.example.securityapp.LocationTrackerService.onStartCommand(LocationTrackerService.java:71)
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
        at android.app.ActivityThread.access$2100(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)