{"id":44,"date":"2009-12-28T17:33:46","date_gmt":"2009-12-28T16:33:46","guid":{"rendered":"https:\/\/www.georgesdick.com\/?p=44"},"modified":"2009-12-28T17:33:46","modified_gmt":"2009-12-28T16:33:46","slug":"les-threads","status":"publish","type":"post","link":"https:\/\/www.georgesdick.com\/?p=44","title":{"rendered":"Les threads"},"content":{"rendered":"

Bien \u00e9videmment, Android permet l’utilisation de thread multiples (\u00e0 vrai dire, il est m\u00eame r\u00e9ellement multi-t\u00e2ches).
\nAttention : il faut garder en t\u00eate qu’un thread n’a pas acc\u00e8s \u00e0 l’\u00e9cran (ou presque : la barre d’alertes lui est ouverte). Donc, quand on lance une action pouvant prendre du temps (par exemple un long calcul, ou une r\u00e9cup\u00e9ration d’informations via Internet), une bonne solution consiste \u00e0 :<\/p>\n

    \n
  1. Lancer un thread qui va effectuer la t\u00e2che \u00ab\u00a0longue\u00a0\u00bb<\/li>\n
  2. Afficher une animation qui montre \u00e0 l’utilisateur que l’application n’est pas \u00ab\u00a0plant\u00e9e\u00a0\u00bb<\/li>\n
  3. Afficher les r\u00e9sultats<\/li>\n<\/ol>\n

    Un exemple :<\/p>\n

    \n


    \n final ProgressDialog dialog = ProgressDialog.show(this, \"Title\", \"Message\", true);
    \n final Handler handler = new Handler()
    \n public void handleMessage(Message msg)
    \n dialog.dismiss();
    \n <\/em>
    \n <\/em>;
    \n Thread checkUpdate = new Thread()
    \n public void run()
    \n \/\/
    \n \/\/ LA TACHE LONGUE VIENT ICI
    \n \/\/
    \n handler.sendEmptyMessage(0);
    \n <\/em>
    \n <\/em>;
    \n checkUpdate.start();
    \n<\/code><\/p>\n

    \n","protected":false},"excerpt":{"rendered":"

    Bien \u00e9videmment, Android permet l’utilisation de thread multiples (\u00e0 vrai dire, il est m\u00eame r\u00e9ellement multi-t\u00e2ches). Attention : il faut garder en t\u00eate qu’un thread n’a pas acc\u00e8s \u00e0 l’\u00e9cran (ou presque : la barre d’alertes lui est ouverte). Donc, quand on lance une action pouvant prendre du temps (par exemple un long calcul, ou […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-44","post","type-post","status-publish","format-standard","hentry","category-android"],"_links":{"self":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=44"}],"version-history":[{"count":0,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=\/wp\/v2\/posts\/44\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.georgesdick.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}