NullPointerException: Attempt to invoke virtual method ‘android.os.Message 记录个AS开发bug。

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Message android.app.IntentService$ServiceHandler.obtainMessage()' on a null object reference

使用Android intentService 的实现类中 要是重写了onCreate() 而没有调用父类的 super.onCreate(); 时会报这个错。

    @Override
    public void onCreate() {

        // super.onCreate();
    }

bug中还不会出现自己写的代码的错误提示，

    java.lang.RuntimeException: Unable to start service com.***.***.Service.FloatingService@4eefcc0 with Intent { cmp=com.***.***/.Service.FloatingService }: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Message android.app.IntentService$ServiceHandler.obtainMessage()' on a null object reference
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4344)
        at android.app.ActivityThread.access$1800(ActivityThread.java:237)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1951)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Message android.app.IntentService$ServiceHandler.obtainMessage()' on a null object reference
        at android.app.IntentService.onStart(IntentService.java:128)
        at android.app.IntentService.onStartCommand(IntentService.java:142)
        at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4326)
        at android.app.ActivityThread.access$1800(ActivityThread.java:237) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1951) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:223) 
        at android.app.ActivityThread.main(ActivityThread.java:7656) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
I/Process: Sending signal. PID: 6897 SIG: 9