Android Question ShineButton why when i use it error?

#AdditionalJar: com.android.tools:annotations

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (login) Create, isFirst = true **
** Activity (login) Resume **
** Activity (login) Pause, UserClosed = true **
** Activity (trangchu) Create, isFirst = true **

Error occurred on line: 49 (trangchu)
java.lang.NullPointerException: Attempt to invoke virtual method 'void main.java.com.sackcentury.shinebuttonlib.ShineButton.setShapeResource(int)' on a null object reference
    at shinebuttonwrapper.shinebuttonWrapper.setShapeResource(shinebuttonWrapper.java:475)
    at b4a.example.trangchu._thubuttonlike(trangchu.java:553)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:735)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:357)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:260)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at b4a.example.trangchu.afterFirstLayout(trangchu.java:104)
    at b4a.example.trangchu.access$000(trangchu.java:17)
    at b4a.example.trangchu$WaitForLayout.run(trangchu.java:82)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5254)
    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:905)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
** Activity (trangchu) Resume **