E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.kusnadi.myapplication, PID: 23902
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.kusnadi.myapplication/com.example.kusnadi.myapplication.ActivityMaps}: java.lang.NullPointerException: Attempt to read from null array
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2342)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2404)
                      at android.app.ActivityThread.access$800(ActivityThread.java:154)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1315)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:135)
                      at android.app.ActivityThread.main(ActivityThread.java:5290)
                      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:911)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)
                   Caused by: java.lang.NullPointerException: Attempt to read from null array
                      at com.example.kusnadi.myapplication.data.DatabaseHandler.defineCategory(DatabaseHandler.java:154)
                      at com.example.kusnadi.myapplication.data.DatabaseHandler.<init>(DatabaseHandler.java:92)
                      at com.example.kusnadi.myapplication.ActivityMaps.onCreate(ActivityMaps.java:92)
                      at android.app.Activity.performCreate(Activity.java:6039)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2404)
                      at android.app.ActivityThread.access$800(ActivityThread.java:154)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1315)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:135)
                      at android.app.ActivityThread.main(ActivityThread.java:5290)
                      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:911)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)