Java tutorial
//package com.java2s; /* * Copyright (c) 2014-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ import android.util.Pair; import java.util.ArrayList; import java.util.List; import java.util.Map; public class Main { public static ArrayList<Pair<String, String>> convertHeaders(Map<String, List<String>> map) { ArrayList<Pair<String, String>> array = new ArrayList<Pair<String, String>>(); for (Map.Entry<String, List<String>> mapEntry : map.entrySet()) { for (String mapEntryValue : mapEntry.getValue()) { // HttpURLConnection puts a weird null entry in the header map that corresponds to // the HTTP response line (for instance, HTTP/1.1 200 OK). Ignore that weirdness... if (mapEntry.getKey() != null) { array.add(Pair.create(mapEntry.getKey(), mapEntryValue)); } } } return array; } }