“w com.rezafirstapp.simplediceroller.mainactivity 2.Run (MainActivity.java:56) w Java.lang.thread.run (Thread.java:923)” Kod odpowiedzi

w com.rezafirstapp.simplediceroller.mainactivity 2.Run (MainActivity.java:56) w Java.lang.thread.run (Thread.java:923)

Error in android studio!!
  at com.rezafirstapp.simplediceroller.MainActivity$2.run(MainActivity.java:56)
        at java.lang.Thread.run(Thread.java:923)