How to move from one ROSactivity to Another Rosactivity on button click in ros_android?

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Hello everyone, I am creating an app that has two activity (eg:Activity1 extends RosActivity,Activity2 extends RosActivity) .So,There is one button in Activity1.When user clicks the particular button it should move to Activity2 like the concepts of Intents in android.The problem is i could not move from Activity1 to Activity2.It crashes.Is there a better way to implement such features.?