Java tutorial
//package com.java2s; import android.annotation.TargetApi; import android.app.Fragment; import android.app.FragmentManager; import android.os.Build; public class Main { @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) public static FragmentManager getChildFragmentManagerIfAvailable(Fragment fragment) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { return fragment.getChildFragmentManager(); } else { return fragment.getFragmentManager(); } } }