Getting a Null pointer exception

[SaravananOffl]

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.android.zoomcar, PID: 10890
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.zoomcar/com.android.zoomcar.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.hide()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.hide()' on a null object reference
at com.sirvar.robin.RobinActivity.onCreate(RobinActivity.java:36)
at com.android.zoomcar.LoginActivity.onCreate(LoginActivity.java:14)
at android.app.Activity.performCreate(Activity.java:6662)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6077) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) 

[SaravananOffl]

This was my login activity
Public class LoginActivity extends RobinActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setLoginTitle("Sign in to Robin");
    setSignupTitle("Welcome to Robin");
    setForgotPasswordTitle("Forgot Password");
    setImage(getResources().getDrawable(R.drawable.common_signin_btn_icon_dark));
    setFont(Typeface.createFromAsset(getAssets(), "Montserrat-Medium.ttf"));
    setTheme(Theme.LIGHT);
    enableSocialLogin();
    showLoginFirst();
}

@Override
protected void onLogin(String email, String password) {

}

@Override
protected void onSignup(String name, String email, String password) {

}

@Override
protected void onForgotPassword(String email) {

}

@Override
protected void onGoogleLogin() {

}

@Override
protected void onFacebookLogin() {

}

}