Java tutorial
//package com.java2s; import android.app.Activity; import android.content.Intent; public class Main { public static void enterActivity(Activity activity, Class clz) { Intent intent = new Intent(activity, clz); activity.startActivity(intent); } public static void enterActivity(Activity activity, Intent intent) { activity.startActivity(intent); } public static void enterActivity(Activity activity, Intent intent, int requestCode) { activity.startActivityForResult(intent, requestCode); } }