{"id":395,"date":"2017-03-27T11:53:10","date_gmt":"2017-03-27T09:53:10","guid":{"rendered":"http:\/\/union31xh.free.fr\/?p=395"},"modified":"2018-12-09T10:31:04","modified_gmt":"2018-12-09T09:31:04","slug":"android-lignes-de-codes-pratiques","status":"publish","type":"post","link":"https:\/\/blogperso.union31.fr\/?p=395","title":{"rendered":"Android\/ Java : lignes de codes pratiques"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sommaire<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Generalites\" >G\u00e9n\u00e9ralit\u00e9s<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Cycle_de_vie_dune_activite\" >Cycle de vie d&rsquo;une activit\u00e9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Multimedia\" >Multim\u00e9dia<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Jouer_un_son\" >Jouer un son<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Retourner_une_image\" >Retourner une image<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Composants_visuels\" >Composants visuels<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#ListView_Recuperer_la_position_courante_du_scroll_puis_la_remettre\" >ListView : R\u00e9cup\u00e9rer la position courante (du scroll) puis la remettre<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Empecher_la_veille_decran_sur_une_activite\" >Emp\u00eacher la veille d&rsquo;\u00e9cran sur une activit\u00e9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Base_de_donnees\" >Base de donn\u00e9es<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Mysql_exemple_de_requetage\" >Mysql : exemple de requ\u00eatage<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Gestion_fichiers\" >Gestion fichiers<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#Android_Gestion_de_fichiers\" >Android : Gestion de fichiers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#JSON_Objet_to_JSON_et_inversement_GSON\" >JSON : Objet to JSON et inversement [GSON]<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#JAVA_Technique\" >JAVA Technique<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/blogperso.union31.fr\/?p=395\/#HashMap_tri\" >HashMap : tri<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Generalites\"><\/span>G\u00e9n\u00e9ralit\u00e9s<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Cycle_de_vie_dune_activite\"><\/span>Cycle de vie d&rsquo;une activit\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-446\" src=\"http:\/\/union31xh.free.fr\/wp-content\/uploads\/2017\/03\/activity_lifecycle.png\" alt=\"\" width=\"523\" height=\"673\" srcset=\"https:\/\/blogperso.union31.fr\/wp-content\/uploads\/2017\/03\/activity_lifecycle.png 523w, https:\/\/blogperso.union31.fr\/wp-content\/uploads\/2017\/03\/activity_lifecycle-233x300.png 233w\" sizes=\"auto, (max-width: 523px) 100vw, 523px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h1><span class=\"ez-toc-section\" id=\"Multimedia\"><\/span>Multim\u00e9dia<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Jouer_un_son\"><\/span>Jouer un son<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre>MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.beep_caisse);\r\nmediaPlayer.start(); \/\/ no need to call prepare(); create() does that for you<\/pre>\n<p>Le fichier son doit se trouver dans app\/res\/raw. Cr\u00e9er le r\u00e9pertoire \u00ab\u00a0raw\u00a0\u00bb s&rsquo;il n&rsquo;existe pas<\/p>\n<p>Tout sur mediaplayer : <a href=\"https:\/\/developer.android.com\/guide\/topics\/media\/mediaplayer.html\" target=\"_blank\" rel=\"noopener\">https:\/\/developer.android.com\/guide\/topics\/media\/mediaplayer.html<\/a><\/p>\n<p>Format pris en charge : <a href=\"https:\/\/developer.android.com\/guide\/topics\/media\/media-formats.html\" target=\"_blank\" rel=\"noopener\">https:\/\/developer.android.com\/guide\/topics\/media\/media-formats.html<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Retourner_une_image\"><\/span>Retourner une image<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre>Matrix matrix = new Matrix();\r\nmatrix.postRotate(90); \/\/ anti-clockwise by 90 degrees\r\nBitmap rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);<\/pre>\n<p>&nbsp;<\/p>\n<h1><span class=\"ez-toc-section\" id=\"Composants_visuels\"><\/span>Composants visuels<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"ListView_Recuperer_la_position_courante_du_scroll_puis_la_remettre\"><\/span>ListView : R\u00e9cup\u00e9rer la position courante (du scroll) puis la remettre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ce morceau de code permet de r\u00e9cup\u00e9rer la position courante d&rsquo;un listview puis de replacer le listview dans la derni\u00e8re position.<\/p>\n<p>&nbsp;<\/p>\n<pre>\/\/ R\u00e9cup\u00e8re position\r\nint index = listview.getFirstVisiblePosition();\r\nView v = listview.getChildAt(0);\r\nint position_affichage = (v == null) ? 0 : (v.getTop() - listview.getPaddingTop());<\/pre>\n<pre>\/\/ Code interm\u00e9diaire\r\n\/\/...\r\n<\/pre>\n<pre>\/\/repositionne la position du listview\r\nlistview.setSelectionFromTop (index,position_affichage);<\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Empecher_la_veille_decran_sur_une_activite\"><\/span>Emp\u00eacher la veille d&rsquo;\u00e9cran sur une activit\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Mettre la propri\u00e9t\u00e9 <em>android:keepScreenOn=\u00a0\u00bbtrue\u00a0\u00bb<\/em><\/p>\n<pre>&lt;FrameLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:keepScreenOn=\"true\"\r\n    &gt;<\/pre>\n<p>ou en ligne de code :<\/p>\n<pre class=\"prettyprint\"><span class=\"pln\">getWindow<\/span><span class=\"pun\">().<\/span><span class=\"pln\">addFlags<\/span><span class=\"pun\">(<\/span><span class=\"typ\">WindowManager<\/span><span class=\"pun\">.<\/span><span class=\"typ\">LayoutParams<\/span><span class=\"pun\">.<\/span><span class=\"pln\">FLAG_KEEP_SCREEN_ON<\/span><span class=\"pun\">);\r\n\r\n<\/span><\/pre>\n<h1><span class=\"ez-toc-section\" id=\"Base_de_donnees\"><\/span>Base de donn\u00e9es<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Mysql_exemple_de_requetage\"><\/span>Mysql : exemple de requ\u00eatage<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pr\u00e9-requis : t\u00e9l\u00e9charger le fichier .jar MysqlConnector<\/p>\n<p>Exemple d&rsquo;une requ\u00eate :<\/p>\n<pre>        Connection conn = null;\r\n        Statement stmt = null;\r\n        \r\n        \/\/ Nom du JDBC driver + URL de la base de donn\u00e9es\r\n        String JDBC_DRIVER = \"com.mysql.jdbc.Driver\";  \r\n        String DB_URL = \"jdbc:mysql:\/\/localhost\/open_food\";\r\n        \/\/  Database credentials\r\n        String USER = \"root\";\r\n        String PASS = \"\";\r\n               \r\n        try {\r\n            Class.forName(\"com.mysql.jdbc.Driver\");\r\n            \/\/ Ouvrir une connexion\r\n            conn = DriverManager.getConnection(DB_URL,USER,PASS);\r\n            \/\/Executer une requ\u00eate\r\n            stmt = conn.createStatement();\r\n            String sql = un_doc.Get_SQL_insert();\r\n            int rs = stmt.executeUpdate(sql);\r\n            \/\/Fermer les connexions\/objets ouverts\r\n            stmt.close();\r\n            conn.close();\r\n        } catch (Exception ex) {\r\n            System.out.println(\"ERREUR --&gt; \" + ex);\r\n        }<\/pre>\n<p>&nbsp;<\/p>\n<p>Pour des requ\u00eates de type \u00ab\u00a0Select\u00a0\u00bb, il faut utiliser la m\u00e9thode \u00ab\u00a0executeQuery\u00a0\u00bb qui va renvoyer un objet de type ResultSet. Ce dernier contiendra les \u00e9l\u00e9ments trouv\u00e9s.<\/p>\n<p>Exemple :<\/p>\n<pre class=\"prettyprint notranslate prettyprinted\">      <span class=\"typ\">\/\/ Execution d'une requ\u00eate de s\u00e9lection\r\n       ResultSet<\/span><span class=\"pln\"> rs <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> stmt<\/span><span class=\"pun\">.<\/span><span class=\"pln\">executeQuery<\/span><span class=\"pun\">(<\/span><span class=\"pln\">sql<\/span><span class=\"pun\">);<\/span>\r\n      <span class=\"com\">\/\/Parcours du r\u00e9sultats<\/span>\r\n      <span class=\"kwd\">while<\/span><span class=\"pun\">(<\/span><span class=\"pln\">rs<\/span><span class=\"pun\">.<\/span><span class=\"kwd\">next<\/span><span class=\"pun\">()){<\/span>\r\n         <span class=\"com\">\/\/R\u00e9cup\u00e9ration des donn\u00e9es des colones<\/span>\r\n         <span class=\"kwd\">int<\/span><span class=\"pln\"> id  <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> rs<\/span><span class=\"pun\">.<\/span><span class=\"pln\">getInt<\/span><span class=\"pun\">(<\/span><span class=\"str\">\"id\"<\/span><span class=\"pun\">);<\/span>\r\n         <span class=\"kwd\">int<\/span><span class=\"pln\"> age <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> rs<\/span><span class=\"pun\">.<\/span><span class=\"pln\">getInt<\/span><span class=\"pun\">(<\/span><span class=\"str\">\"age\"<\/span><span class=\"pun\">);<\/span>\r\n         <span class=\"typ\">String<\/span><span class=\"pln\"> first <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> rs<\/span><span class=\"pun\">.<\/span><span class=\"pln\">getString<\/span><span class=\"pun\">(<\/span><span class=\"str\">\"first\"<\/span><span class=\"pun\">);<\/span>\r\n         <span class=\"typ\">String<\/span> <span class=\"kwd\">last<\/span> <span class=\"pun\">=<\/span><span class=\"pln\"> rs<\/span><span class=\"pun\">.<\/span><span class=\"pln\">getString<\/span><span class=\"pun\">(<\/span><span class=\"str\">\"last\"<\/span><span class=\"pun\">);<\/span>\r\n      <span class=\"pun\">}<\/span>\r\n      <span class=\"com\">\/\/fermeture du resultset<\/span><span class=\"pln\">\r\n      rs<\/span><span class=\"pun\">.<\/span><span class=\"pln\">close<\/span><span class=\"pun\">();<\/span><\/pre>\n<p>&nbsp;<\/p>\n<h1><span class=\"ez-toc-section\" id=\"Gestion_fichiers\"><\/span>Gestion fichiers<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"Android_Gestion_de_fichiers\"><\/span>Android : Gestion de fichiers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>en cours &#8230;<\/p>\n<p>Il y a deux possibilit\u00e9s qui s&rsquo;offre \u00e0 nous :<\/p>\n<ul>\n<li>\u00e9crire dans la carte SD du t\u00e9l\u00e9phone (si elle existe) :\n<ul>\n<li>il n&rsquo;y pas de limitation particuli\u00e8res concernant l&#8217;emplacement de stockage ;<\/li>\n<li>toutes les applications peuvent voir les donn\u00e9es<\/li>\n<\/ul>\n<\/li>\n<li>\u00e9crire dans la m\u00e9moire interne du t\u00e9l\u00e9phone :\n<ul>\n<li>c&rsquo;est limit\u00e9 au seul r\u00e9pertoire de l&rsquo;application<\/li>\n<li>seule l&rsquo;application peut acc\u00e9der aux donn\u00e9es.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Bref il faut faire un choix &#8230;<\/p>\n<p>Exemple de code :<\/p>\n<p>le code ci-dessous montre comment lire et \u00e9crire. Il tente d&rsquo;abord d&rsquo;\u00e9crire sur la carte SD et le cas \u00e9ch\u00e9ant sur la m\u00e9moire interne du t\u00e9l\u00e9phone.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JSON_Objet_to_JSON_et_inversement_GSON\"><\/span>JSON : Objet to JSON et inversement [GSON]<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Dans Android la biblioth\u00e8que org.json n&rsquo;est pas tout \u00e0 fait la m\u00eame que celle de JAVA.<\/p>\n<p>Notamment dans le constructeur de la classe JSONObject qui permet en param\u00e8tre de transformer un objet (complexe) en json. Ce qui n&rsquo;existe pas dans la librairie sous ANDROID (bien qu&rsquo;elle porte le m\u00eame nom).<\/p>\n<p>A savoir Google met \u00e0 disposition une libraire suppl\u00e9mentaire nomm\u00e9e GSON qui permet de faire cela tr\u00e8s simplement. Elle est donc sp\u00e9cialis\u00e9 sur la s\u00e9rialisation et s\u00e9rialisation classe vers Json<\/p>\n<p>Cette libraire est disponible sur https:\/\/github.com\/google\/gson.<\/p>\n<p>Exemple de code :<\/p>\n<pre>public String Utilisateur_to_Json(Utilisateur un_utilisateur) {\r\n    String String_JSON =\"\";\r\n    <strong>Gson gson = new Gson();<\/strong>\r\n    String_JSON = <strong>gson.toJson<\/strong>(un_utilisateur);\r\n    return String_JSON;\r\n}<\/pre>\n<p>Ce qui donne un r\u00e9sultat suivant :<\/p>\n<pre>{\"Id\":1,\"Mail\":\"union31xh@free.fr\",\"Nom\":\"UNION\",\"Prenom\":\"31xh\",\"Profils\":[{\"Id\":1,\"Libelle\":\"Maison\",\"Stocks\":[{\"Id\":1,\"Libelle\":\"StockA\",\"Produits\":[{\"Id\":2,\"Id_Stock\":1,\"CODE_EAN\":\"Code EAN Produit B\",\"date_ajout\":\"Apr 21, 2017 9:57:53 AM\",\"date_retrait\":\"Apr 21, 2017 9:57:53 AM\",\"Present_referentiel\":false}]},{\"Id\":2,\"Libelle\":\"StockB\",\"Produits\":[{\"Id\":1,\"Id_Stock\":2,\"CODE_EAN\":\"EAN produit A\",\"date_ajout\":\"Apr 21, 2017 9:57:53 AM\",\"date_retrait\":\"Apr 21, 2017 9:57:53 AM\",\"Present_referentiel\":false}]}]}]}<\/pre>\n<p>Pour une structure de classes suivante :<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-450\" src=\"http:\/\/union31xh.free.fr\/wp-content\/uploads\/2017\/03\/Ex_classes_java.png\" alt=\"\" width=\"720\" height=\"259\" srcset=\"https:\/\/blogperso.union31.fr\/wp-content\/uploads\/2017\/03\/Ex_classes_java.png 859w, https:\/\/blogperso.union31.fr\/wp-content\/uploads\/2017\/03\/Ex_classes_java-300x108.png 300w, https:\/\/blogperso.union31.fr\/wp-content\/uploads\/2017\/03\/Ex_classes_java-768x276.png 768w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>A l&rsquo;inverse le code est le suivant :<\/p>\n<pre><strong>Gson gson = new Gson();<\/strong>\r\nUtilisateur un_utilisateur = <strong>gson.fromJson<\/strong>(Texte_JSON, <strong>Utilisateur.class<\/strong>);\r\nreturn un_utilisateur;<\/pre>\n<p>&nbsp;<\/p>\n<h1><span class=\"ez-toc-section\" id=\"JAVA_Technique\"><\/span>JAVA Technique<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"HashMap_tri\"><\/span>HashMap : tri<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Un HashMap ne se trie pas en soit. N\u00e9anmoins il est possible d&rsquo;obtenir tr\u00e8s facilement un TreeMap tri\u00e9 \u00e0 partir d&rsquo;un HaspMap. Seule condition, passer par un \u00ab\u00a0comparator\u00a0\u00bb.<\/p>\n<p>Exemple de code \u00e9pur\u00e9 tir\u00e9 du site <a href=\"http:\/\/www.chicoree.fr\/w\/Programmation_imp%C3%A9rative\/Tableaux_associatifs#Java\" target=\"_blank\" rel=\"noopener\">chicor\u00e9<\/a><\/p>\n<pre style=\"padding-left: 30px;\">\r\n\r\nimport java.util.Comparator;\r\nimport java.util.HashMap;\r\nimport java.util.Map;\r\nimport java.util.TreeMap;\r\n\r\npublic class Tri {\r\n\r\npublic static void main(String[] args) {\r\n\r\n<strong>  HashMap map = new HashMap();<\/strong>\r\n<span style=\"color: #ff0000;\">  Comparateur comp = new Comparateur(map);<\/span>\r\n<span style=\"color: #ff0000;\">  TreeMap map_apres = new TreeMap(comp);<\/span>\r\n\r\n  map.put(\"A\",49);\r\n  map.put(\"B\",18);\r\n  map.put(\"C\",92);\r\n  map.put(\"D\",37);\r\n  map.put(\"E\",62);\r\n\r\n  System.out.println(\"Avant le tri: \"+map);\r\n  <span style=\"color: #ff0000;\">map_apres.putAll(map);<\/span>\r\n  System.out.println(\"Apr\u00e8s le tri: \"+map_apres);\r\n}\r\n}\r\n\r\n<span style=\"color: #ff6600;\">class Comparateur implements Comparator {<\/span>\r\n\r\n<span style=\"color: #ff6600;\">  Map tuple;<\/span>\r\n<span style=\"color: #ff6600;\">  public Comparateur(HashMap map) {<\/span>\r\n<span style=\"color: #ff6600;\">    this.tuple = map;<\/span>\r\n<span style=\"color: #ff6600;\">  }<\/span>\r\n\r\n<span style=\"color: #ff6600;\">\/\/ce comparateur ordonne les \u00e9l\u00e9ments dans l'ordre d\u00e9croissant <\/span>\r\n<span style=\"color: #ff6600;\">  @Override<\/span>\r\n<span style=\"color: #ff6600;\">  public int compare(Object o1, Object o2) {<\/span>\r\n<span style=\"color: #ff6600;\">    \/\/ TODO Auto-generated method stub<\/span>\r\n<span style=\"color: #ff6600;\">    if ((int) tuple.get(o1) &gt;= (int) tuple.get(o2)) {<\/span>\r\n<span style=\"color: #ff6600;\">      return -1;<\/span>\r\n<span style=\"color: #ff6600;\">    } else {<\/span>\r\n<span style=\"color: #ff6600;\">      return 1;<\/span>\r\n<span style=\"color: #ff6600;\">  }<\/span>\r\n<span style=\"color: #ff6600;\">}<\/span>\r\n\r\n}\r\n\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>G\u00e9n\u00e9ralit\u00e9s Cycle de vie d&rsquo;une activit\u00e9 &nbsp; Multim\u00e9dia Jouer un son MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.beep_caisse); mediaPlayer.start(); \/\/ no need to call prepare(); create() does that for you Le fichier son doit se trouver dans app\/res\/raw. Cr\u00e9er le r\u00e9pertoire \u00ab\u00a0raw\u00a0\u00bb<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-395","post","type-post","status-publish","format-standard","hentry","category-_dev"],"_links":{"self":[{"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/posts\/395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=395"}],"version-history":[{"count":20,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/posts\/395\/revisions"}],"predecessor-version":[{"id":744,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=\/wp\/v2\/posts\/395\/revisions\/744"}],"wp:attachment":[{"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogperso.union31.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}