Java tutorial
//package com.java2s; import android.support.annotation.IdRes; import android.support.annotation.NonNull; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class Main { public static void addFragmentToActivity(@NonNull FragmentManager manager, @NonNull Fragment fragment, @IdRes int id) { FragmentTransaction transaction = manager.beginTransaction(); transaction.add(id, fragment); transaction.commit(); } }