请问这种问题如何处理

Question

java.lang.NullPointerException
at com.xonix.timecalibrator.utils.k.run(Unknown Source)
at com.xonix.timecalibrator.utils.MyDigitalClock.a(Unknown Source)
at com.xonix.timecalibrator.utils.MyDigitalClock.a(Unknown Source)
at com.xonix.timecalibrator.q.handleMessage(Unknown Source)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4028)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method

google play上的反馈结果
其中，MyDigitalClock为对应包下类文件名，找不出异常位置。