App crashing when trying to invoke startLuhn method

[ramseth001]

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.###.app, PID: 9733 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.design.widget.CheckableImageButton.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at xyz.belvi.luhn.Luhn$4.run(Luhn.java:259) at android.os.Handler.handleCallback(Handler.java:790) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:198) at android.app.ActivityThread.main(ActivityThread.java:7038) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:523) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:836) E/Parcel: Reading a NULL string not supported here.

[kaushal2406]

found any solution ? i am also getting same problem .

[mahbubmukul]

i am also getting same problem .

[davidhowe]

Same, even tried using master SNAPSHOT hoping it would have the fix. Crash is occurring here: Luhn.java: 259 -> Luhn.this.cardNumber.getPasswordToggleView().setOnClickListener...