{"id":1202,"date":"2025-03-24T08:52:37","date_gmt":"2025-03-23T23:52:37","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1202"},"modified":"2025-03-24T08:52:37","modified_gmt":"2025-03-23T23:52:37","slug":"rxjava%e5%85%a5%e9%96%80%ef%bc%9a5%e3%81%a4%e3%81%ae%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5%e3%81%a87%e3%81%a4%e3%81%ae%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%81%aa%e3%83%a6%e3%83%bc%e3%82%b9%e3%82%b1%e3%83%bc","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1202","title":{"rendered":"RxJava\u5165\u9580\uff1a5\u3064\u306e\u57fa\u672c\u6982\u5ff5\u30687\u3064\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u5b66\u3076\u5b9f\u8df5\u30ac\u30a4\u30c9"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">RxJava \u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u6982\u5ff5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u306a\u305c\u4eca\u958b\u767a\u8005\u306f RxJava \u3092\u9078\u3076\u306e\u304b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\u3068\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\u63a7\u3048\u3066\u304a\u304d\u305f\u3044RxJava\u306e5\u3064\u306e\u91cd\u8981\u306a\u6982\u5ff5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">Observable\uff1a\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u57fa\u790e\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-5\">Operator\uff1a\u30c7\u30fc\u30bf\u5909\u63db\u306e\u5f37\u529b\u306a\u5473\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\uff1a\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u4e2d\u5fc3\u7684\u306a\u5f79\u5272<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\uff1a\u975e\u540c\u671f\u51e6\u7406\u306e\u5236\u5fa1\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u30c7\u30a3\u30b9\u30dd\u30fc\u30b6\u30d6\u30eb\uff1a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">RxJava\u3067\u5b9f\u73fe\u3059\u308b7\u3064\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">API\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u8907\u6570\u306eAPI\u306e\u4e26\u5217\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u7c21\u5358\u306b\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u51e6\u7406\u3068UI\u66f4\u65b0\u306e\u9023\u643a\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u975e\u540c\u671f\u3067\u52b9\u7387\u5316<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u30a4\u30d9\u30f3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306b\u3088\u308b\u5165\u529b\u691c\u8a3c\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">RxJava\u3067\u9665\u308a\u3084\u3059\u30443\u3064\u306e\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u8907\u96d1\u306a\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u30c1\u30a7\u30fc\u30f3\u306e\u8a2d\u8a08\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u624b\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-21\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076RxJava \u5c0e\u5165\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-22\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5c0e\u5165\u624b\u9806\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-23\">\u65e2\u5b58\u30b3\u30fc\u30c9\u304b\u3089\u306e\u6bb5\u968e\u7684\u306a\u79fb\u884c\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-24\">\u5b9f\u88c5\u4f8b\u304b\u3089\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3076<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-25\">\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u5b66\u3076<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">RxJava \u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u6982\u5ff5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u306a\u305c\u4eca\u958b\u767a\u8005\u306f RxJava \u3092\u9078\u3076\u306e\u304b<\/h3>\n\n\n\n<p>RxJava\u306f\u3001Reactive Extensions\uff08ReactiveX\uff09\u306eJava\u5b9f\u88c5\u3068\u3057\u3066\u3001\u975e\u540c\u671f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u9a5a\u304f\u307b\u3069\u7c21\u5358\u306b\u5b9f\u73fe\u3067\u304d\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u8fd1\u5e74\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u304cRxJava\u3092\u63a1\u7528\u3059\u308b\u7406\u7531\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u660e\u78ba\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u975e\u540c\u671f\u51e6\u7406\u306e\u7c21\u7d20\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u9023\u9396\u3092\u8aad\u307f\u3084\u3059\u3044\u5ba3\u8a00\u7684\u306a\u30b3\u30fc\u30c9\u306b\u5909\u63db<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u7ba1\u7406\u3092\u7c21\u5358\u306b\u5236\u5fa1\u53ef\u80fd<\/li>\n\n\n\n<li>\u4e26\u5217\u51e6\u7406\u306e\u5b9f\u88c5\u304c\u76f4\u611f\u7684<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9f\u73fe<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u3068\u3057\u3066\u60c5\u5831\u3092\u6271\u3046\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u51e6\u7406\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u578b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u6700\u9069<\/li>\n\n\n\n<li>\u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u306e\u5236\u5fa1\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5f37\u529b\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>try-catch\u306e\u7169\u96d1\u3055\u304b\u3089\u89e3\u653e<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u306e\u4f1d\u64ad\u3092\u5236\u5fa1\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u5fa9\u65e7\u51e6\u7406\u306e\u5b9f\u88c5\u304c\u5bb9\u6613<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\u3068\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\u3068RxJava\u3092\u6bd4\u8f03\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u9769\u65b0\u6027\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<p><strong>\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\uff08Callback\u65b9\u5f0f\uff09\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\u306e\u4f8b\npublic void fetchUserData(int userId, Callback callback) {\n    new Thread(() -&gt; {\n        try {\n            \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u53d6\u5f97\n            User user = database.getUser(userId);\n            \/\/ API\u304b\u3089\u8ffd\u52a0\u60c5\u5831\u3092\u53d6\u5f97\n            UserDetails details = api.getUserDetails(user);\n            \/\/ \u7d50\u679c\u3092\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3067\u51e6\u7406\n            new Handler(Looper.getMainLooper()).post(() -&gt; {\n                callback.onSuccess(details);\n            });\n        } catch (Exception e) {\n            new Handler(Looper.getMainLooper()).post(() -&gt; {\n                callback.onError(e);\n            });\n        }\n    }).start();\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nfetchUserData(123, new Callback() {\n    @Override\n    public void onSuccess(UserDetails details) {\n        \/\/ \u6210\u529f\u6642\u306e\u51e6\u7406\n    }\n\n    @Override\n    public void onError(Exception e) {\n        \/\/ \u30a8\u30e9\u30fc\u6642\u306e\u51e6\u7406\n    }\n});<\/pre>\n\n\n\n<p><strong>RxJava\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ RxJava\u3092\u4f7f\u7528\u3057\u305f\u975e\u540c\u671f\u51e6\u7406\u306e\u4f8b\npublic Observable&lt;UserDetails&gt; fetchUserData(int userId) {\n    return Observable.just(userId)\n        .subscribeOn(Schedulers.io())\n        .map(id -&gt; database.getUser(id))\n        .map(user -&gt; api.getUserDetails(user))\n        .observeOn(AndroidSchedulers.mainThread());\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nfetchUserData(123)\n    .subscribe(\n        details -&gt; {\/* \u6210\u529f\u6642\u306e\u51e6\u7406 *\/},\n        error -&gt; {\/* \u30a8\u30e9\u30fc\u6642\u306e\u51e6\u7406 *\/}\n    );<\/pre>\n\n\n\n<p>\u3053\u306e\u6bd4\u8f03\u304b\u3089\u3001RxJava\u306e\u4e3b\u306a\u5229\u70b9\u304c\u898b\u3048\u3066\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306b\u3088\u308b\u76f4\u611f\u7684\u306a\u51e6\u7406\u306e\u6d41\u308c<\/li>\n\n\n\n<li>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u30cd\u30b9\u30c8\u304c\u89e3\u6d88<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u7d71\u4e00\u7684\u306a\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u7ba1\u7406\u306e\u7c21\u7d20\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>subscribeOn<\/code>\u3068<code>observeOn<\/code>\u306b\u3088\u308b\u660e\u793a\u7684\u306a\u30b9\u30ec\u30c3\u30c9\u5236\u5fa1<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u306e\u5207\u308a\u66ff\u3048\u304c\u5bb9\u6613<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u52b9\u7387\u7684\u306a\u5229\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u306a\u51e6\u7406\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u5909\u63db\u3084\u7d50\u5408\u304c\u7c21\u5358<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30ea\u30c8\u30e9\u30a4\u306a\u3069\u306e\u4ed8\u52a0\u7684\u306a\u51e6\u7406\u304c\u8ffd\u52a0\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<p>RxJava\u306f\u3001\u3053\u306e\u3088\u3046\u306b\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3057\u3001\u3088\u308a\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001RxJava\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u306b\u3064\u3044\u3066\u3001\u3088\u308a\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">\u63a7\u3048\u3066\u304a\u304d\u305f\u3044RxJava\u306e5\u3064\u306e\u91cd\u8981\u306a\u6982\u5ff5<\/h2>\n\n\n\n<p>RxJava\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u30015\u3064\u306e\u6838\u3068\u306a\u308b\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u306f\u3001RxJava\u306e\u57fa\u76e4\u3068\u306a\u308a\u3001\u5b9f\u8df5\u7684\u306a\u958b\u767a\u306b\u304a\u3044\u3066\u5e38\u306b\u610f\u8b58\u3059\u3079\u304d\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">Observable\uff1a\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u57fa\u790e\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>Observable\u306f\u3001RxJava\u306e\u4e2d\u5fc3\u7684\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8868\u73fe\u3059\u308b\u57fa\u672c\u7684\u306a\u578b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306aObservable\u306e\u4f5c\u6210\u65b9\u6cd5\nObservable&lt;String&gt; simple = Observable.just(\"Hello\", \"RxJava\");\n\n\/\/ \u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u4f5c\u6210\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\nObservable&lt;Integer&gt; numbers = Observable.range(1, 10)\n    .filter(n -&gt; n % 2 == 0)  \/\/ \u5076\u6570\u306e\u307f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n    .map(n -&gt; n * 2);         \/\/ \u5404\u5024\u30922\u500d\u306b\u5909\u63db\n\n\/\/ \u30ab\u30b9\u30bf\u30e0Observable\u306e\u4f5c\u6210\nObservable&lt;Long&gt; customStream = Observable.create(emitter -&gt; {\n    try {\n        emitter.onNext(1L);\n        emitter.onNext(2L);\n        emitter.onComplete();\n    } catch (Exception e) {\n        emitter.onError(e);\n    }\n});<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">Operator\uff1a\u30c7\u30fc\u30bf\u5909\u63db\u306e\u5f37\u529b\u306a\u5473\u65b9<\/h3>\n\n\n\n<p>Operator\u306f\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u5909\u63db\u30fb\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u30bb\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4ee3\u8868\u7684\u306aOperator\u306e\u4f7f\u7528\u4f8b\nObservable.just(1, 2, 3, 4, 5)\n    .map(n -&gt; n * 10)          \/\/ \u5404\u8981\u7d20\u309210\u500d\n    .filter(n -&gt; n &gt; 20)       \/\/ 20\u3088\u308a\u5927\u304d\u3044\u5024\u3092\u30d5\u30a3\u30eb\u30bf\n    .flatMap(n -&gt; \n        Observable.just(n, n + 1)) \/\/ \u5404\u8981\u7d20\u304b\u3089\u65b0\u3057\u3044\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u751f\u6210\n    .distinct()                \/\/ \u91cd\u8907\u3092\u9664\u53bb\n    .subscribe(System.out::println);\n\n\/\/ \u3088\u304f\u4f7f\u7528\u3055\u308c\u308bOperator\u306e\u7d44\u307f\u5408\u308f\u305b\nObservable.interval(1, TimeUnit.SECONDS)  \/\/ 1\u79d2\u3054\u3068\u306b\u5024\u3092\u751f\u6210\n    .take(5)                   \/\/ \u6700\u521d\u306e5\u8981\u7d20\u306e\u307f\u3092\u53d6\u5f97\n    .debounce(500,            \/\/ 500\u30df\u30ea\u79d2\u4ee5\u5185\u306e\u9023\u7d9a\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u3092\u30b9\u30ad\u30c3\u30d7\n        TimeUnit.MILLISECONDS)\n    .subscribe(n -&gt; System.out.println(\"Received: \" + n));<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\uff1a\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u4e2d\u5fc3\u7684\u306a\u5f79\u5272<\/h3>\n\n\n\n<p>\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306f\u3001Observable\u304b\u3089\u767a\u884c\u3055\u308c\u308b\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u308c\u3089\u3092\u51e6\u7406\u3059\u308b\u5f79\u5272\u3092\u62c5\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306aSubscriber\u5b9f\u88c5\nObservable&lt;Integer&gt; source = Observable.range(1, 5);\n\nsource.subscribe(new Observer&lt;Integer&gt;() {\n    @Override\n    public void onSubscribe(Disposable d) {\n        System.out.println(\"Subscribed\");\n    }\n\n    @Override\n    public void onNext(Integer value) {\n        System.out.println(\"Received: \" + value);\n    }\n\n    @Override\n    public void onError(Throwable e) {\n        System.err.println(\"Error: \" + e.getMessage());\n    }\n\n    @Override\n    public void onComplete() {\n        System.out.println(\"Completed\");\n    }\n});\n\n\/\/ \u30e9\u30e0\u30c0\u3092\u4f7f\u7528\u3057\u305f\u7c21\u6f54\u306a\u5b9f\u88c5\nsource.subscribe(\n    value -&gt; System.out.println(\"Received: \" + value),\n    error -&gt; System.err.println(\"Error: \" + error.getMessage()),\n    () -&gt; System.out.println(\"Completed\")\n);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\uff1a\u975e\u540c\u671f\u51e6\u7406\u306e\u5236\u5fa1\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u3001\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u30b9\u30ec\u30c3\u30c9\u3092\u5236\u5fa1\u3057\u3001\u52b9\u7387\u7684\u306a\u975e\u540c\u671f\u51e6\u7406\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u7570\u306a\u308b\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u4f7f\u7528\u4f8b\nObservable.just(\"Heavy computation task\")\n    .subscribeOn(Schedulers.computation())  \/\/ \u8a08\u7b97\u51e6\u7406\u7528\u306e\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\n    .map(str -&gt; heavyComputation(str))\n    .observeOn(AndroidSchedulers.mainThread())  \/\/ UI\u30b9\u30ec\u30c3\u30c9\u3067\u7d50\u679c\u3092\u51e6\u7406\n    .subscribe(result -&gt; updateUI(result));\n\n\/\/ \u8907\u6570\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u7d44\u307f\u5408\u308f\u305b\nObservable.fromCallable(() -&gt; readFromDatabase())\n    .subscribeOn(Schedulers.io())          \/\/ I\/O\u51e6\u7406\u7528\u306e\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\n    .observeOn(Schedulers.computation())   \/\/ \u8a08\u7b97\u51e6\u7406\u7528\u306e\u30b9\u30ec\u30c3\u30c9\u3067\u5909\u63db\u51e6\u7406\n    .map(data -&gt; processData(data))\n    .observeOn(AndroidSchedulers.mainThread())  \/\/ UI\u30b9\u30ec\u30c3\u30c9\u3067\u8868\u793a\n    .subscribe(result -&gt; showResult(result));<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30c7\u30a3\u30b9\u30dd\u30fc\u30b6\u30d6\u30eb\uff1a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30c7\u30a3\u30b9\u30dd\u30fc\u30b6\u30d6\u30eb\u306f\u3001\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u3068\u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u89e3\u653e\u3092\u62c5\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ CompositeDisposable\u3092\u4f7f\u7528\u3057\u305f\u8907\u6570\u306e\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u7ba1\u7406\npublic class UserViewModel {\n    private final CompositeDisposable disposables = new CompositeDisposable();\n\n    public void loadUserData(int userId) {\n        Disposable disposable = apiService.getUserData(userId)\n            .subscribeOn(Schedulers.io())\n            .observeOn(AndroidSchedulers.mainThread())\n            .subscribe(\n                user -&gt; updateUI(user),\n                error -&gt; handleError(error)\n            );\n\n        disposables.add(disposable);\n    }\n\n    public void onCleared() {\n        \/\/ \u5168\u3066\u306e\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u89e3\u9664\n        disposables.clear();\n    }\n}\n\n\/\/ AutoDisposable\u3092\u4f7f\u7528\u3057\u305f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u9023\u52d5\u306e\u7ba1\u7406\nObservable&lt;String&gt; observable = Observable.interval(1, TimeUnit.SECONDS)\n    .map(tick -&gt; \"Tick: \" + tick);\n\nobservable\n    .as(AutoDispose.autoDisposable(AndroidLifecycleScopeProvider\n        .from(this, Lifecycle.Event.ON_DESTROY)))\n    .subscribe(tick -&gt; updateUI(tick));<\/pre>\n\n\n\n<p>\u3053\u308c\u30895\u3064\u306e\u6982\u5ff5\u306f\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u5408\u3044\u3001RxJava\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u652f\u3048\u3066\u3044\u307e\u3059\u3002\u5404\u6982\u5ff5\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u975e\u540c\u671f\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">RxJava\u3067\u5b9f\u73fe\u3059\u308b7\u3064\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067RxJava\u304c\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u30017\u3064\u306e\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">API\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>API\u3068\u306e\u901a\u4fe1\u306f\u3001\u30e2\u30c0\u30f3\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u6700\u3082\u4e00\u822c\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e1\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ApiService {\n    private final RetrofitApi api;\n\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u4f8b\n    public Observable&lt;User&gt; fetchUserData(String userId) {\n        return api.getUser(userId)\n            .subscribeOn(Schedulers.io())\n            .observeOn(AndroidSchedulers.mainThread())\n            .retry(3)  \/\/ \u5931\u6557\u6642\u306f3\u56de\u307e\u3067\u30ea\u30c8\u30e9\u30a4\n            .doOnSubscribe(disposable -&gt; showLoading())\n            .doFinally(this::hideLoading)\n            .cache();  \/\/ \u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\n    }\n\n    \/\/ \u4f7f\u7528\u4f8b\n    private void loadUserData() {\n        fetchUserData(\"user123\")\n            .subscribe(\n                user -&gt; updateUI(user),\n                error -&gt; handleError(error)\n            );\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u8907\u6570\u306eAPI\u306e\u4e26\u5217\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u7c21\u5358\u306b\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u8907\u6570\u306eAPI\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u305d\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306e\u5b9f\u88c5\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public Observable&lt;UserProfile&gt; getUserProfile(String userId) {\n    Observable&lt;UserData&gt; userData = api.getUserData(userId);\n    Observable&lt;UserPreferences&gt; userPrefs = api.getUserPreferences(userId);\n    Observable&lt;UserSettings&gt; userSettings = api.getUserSettings(userId);\n\n    return Observable.zip(\n        userData,\n        userPrefs,\n        userSettings,\n        (data, prefs, settings) -&gt; new UserProfile(data, prefs, settings)\n    )\n    .subscribeOn(Schedulers.io())\n    .observeOn(AndroidSchedulers.mainThread());\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u51e6\u7406\u3068UI\u66f4\u65b0\u306e\u9023\u643a\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u9577\u6642\u9593\u306e\u51e6\u7406\u3068UI\u66f4\u65b0\u3092\u52b9\u7387\u7684\u306b\u9023\u643a\u3055\u305b\u308b\u5b9f\u88c5\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ImageProcessor {\n    public Observable&lt;Bitmap&gt; processImage(Uri imageUri) {\n        return Observable.fromCallable(() -&gt; {\n            \/\/ \u91cd\u3044\u753b\u50cf\u51e6\u7406\n            Bitmap original = loadBitmap(imageUri);\n            return applyFilters(original);\n        })\n        .subscribeOn(Schedulers.computation())\n        .observeOn(AndroidSchedulers.mainThread())\n        .doOnNext(bitmap -&gt; updateProgressBar(100))\n        .doOnError(error -&gt; showErrorDialog(error));\n    }\n\n    \/\/ \u9032\u6357\u72b6\u6cc1\u306e\u66f4\u65b0\u3092\u542b\u3080\u5b9f\u88c5\n    public Observable&lt;ProcessingProgress&gt; processImagesWithProgress(List&lt;Uri&gt; images) {\n        return Observable.fromIterable(images)\n            .flatMap(uri -&gt; \n                processImage(uri)\n                    .map(bitmap -&gt; new ProcessingProgress(uri, bitmap))\n                    .doOnNext(progress -&gt; \n                        updateProgress(progress.getPercentComplete()))\n            );\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u975e\u540c\u671f\u3067\u52b9\u7387\u5316<\/h3>\n\n\n\n<p>Room\u7b49\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092RxJava\u3067\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Dao\npublic interface UserDao {\n    @Query(\"SELECT * FROM users\")\n    Observable&lt;List&lt;User&gt;&gt; getAllUsers();\n\n    @Insert\n    Completable insertUser(User user);\n\n    @Update\n    Completable updateUser(User user);\n}\n\npublic class UserRepository {\n    private final UserDao userDao;\n    private final CompositeDisposable disposables = new CompositeDisposable();\n\n    public void syncUsers(List&lt;User&gt; users) {\n        disposables.add(\n            Observable.fromIterable(users)\n                .flatMapCompletable(user -&gt; \n                    userDao.insertUser(user)\n                        .onErrorResumeNext(error -&gt; \n                            userDao.updateUser(user))\n                )\n                .subscribeOn(Schedulers.io())\n                .observeOn(AndroidSchedulers.mainThread())\n                .subscribe(\n                    () -&gt; Log.d(\"UserRepo\", \"Sync completed\"),\n                    error -&gt; Log.e(\"UserRepo\", \"Sync failed\", error)\n                )\n        );\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30a4\u30d9\u30f3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306b\u3088\u308b\u5165\u529b\u691c\u8a3c\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u691c\u8a3c\u3084\u30d5\u30a9\u30fc\u30e0\u51e6\u7406\u3092\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class SearchViewModel {\n    private final PublishSubject&lt;String&gt; searchSubject = PublishSubject.create();\n\n    public void setupSearch() {\n        disposables.add(\n            searchSubject\n                .debounce(300, TimeUnit.MILLISECONDS)  \/\/ \u30bf\u30a4\u30d4\u30f3\u30b0\u5b8c\u4e86\u3092\u5f85\u6a5f\n                .filter(query -&gt; query.length() &gt;= 3)   \/\/ 3\u6587\u5b57\u4ee5\u4e0a\u3067\u691c\u7d22\u958b\u59cb\n                .distinctUntilChanged()                 \/\/ \u524d\u56de\u3068\u540c\u3058\u30af\u30a8\u30ea\u306f\u7121\u8996\n                .switchMap(query -&gt; \n                    api.search(query)\n                        .subscribeOn(Schedulers.io())\n                        .onErrorResumeNext(Observable.empty())\n                )\n                .observeOn(AndroidSchedulers.mainThread())\n                .subscribe(\n                    results -&gt; updateSearchResults(results),\n                    error -&gt; handleSearchError(error)\n                )\n        );\n    }\n\n    public void onSearchTextChanged(String query) {\n        searchSubject.onNext(query);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u3092\u5b9f\u88c5\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class CacheableDataRepository {\n    private final BehaviorSubject&lt;Data&gt; dataCache = BehaviorSubject.create();\n\n    public Observable&lt;Data&gt; getData() {\n        return Observable.concatArrayEager(\n            \/\/ 1. \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\n            dataCache.take(1),\n            \/\/ 2. API\u304b\u3089\u306e\u6700\u65b0\u30c7\u30fc\u30bf\u53d6\u5f97\n            api.fetchFreshData()\n                .doOnNext(data -&gt; dataCache.onNext(data))\n        )\n        .subscribeOn(Schedulers.io())\n        .observeOn(AndroidSchedulers.mainThread());\n    }\n\n    \/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n    public Observable&lt;Data&gt; getDataWithMemoryManagement() {\n        return Observable.defer(() -&gt; {\n            if (dataCache.hasValue()) {\n                return dataCache.take(1);\n            }\n            return api.fetchFreshData()\n                .doOnNext(data -&gt; dataCache.onNext(data));\n        });\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u69d8\u3005\u306a\u30a8\u30e9\u30fc\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3059\u308b\u5b9f\u88c5\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RobustDataService {\n    public Observable&lt;Data&gt; fetchDataWithRetry(String id) {\n        return api.fetchData(id)\n            .retryWhen(errors -&gt; \n                errors.flatMap(error -&gt; {\n                    if (error instanceof NetworkException) {\n                        return Observable.timer(1, TimeUnit.SECONDS);\n                    } else if (error instanceof TimeoutException) {\n                        return Observable.timer(2, TimeUnit.SECONDS);\n                    }\n                    return Observable.error(error);\n                })\n            )\n            .timeout(10, TimeUnit.SECONDS)\n            .onErrorResumeNext(error -&gt; {\n                if (error instanceof TimeoutException) {\n                    return getFromCache(id);\n                }\n                return Observable.error(error);\n            })\n            .doOnError(error -&gt; logError(error));\n    }\n\n    private Observable&lt;Data&gt; getFromCache(String id) {\n        return Observable.defer(() -&gt; \n            cache.get(id)\n                .toObservable()\n                .onErrorResumeNext(Observable.empty())\n        );\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u983b\u7e41\u306b\u906d\u9047\u3059\u308b\u8ab2\u984c\u306b\u5bfe\u3059\u308b\u5b9f\u8df5\u7684\u306a\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001RxJava\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u6ce8\u610f\u3059\u3079\u304d\u554f\u984c\u70b9\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">RxJava\u3067\u9665\u308a\u3084\u3059\u30443\u3064\u306e\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h2>\n\n\n\n<p>RxJava\u306f\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3088\u304f\u3042\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u3001RxJava\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u306e1\u3064\u3067\u3059\u3002\u4e3b\u306a\u539f\u56e0\u3068\u89e3\u6c7a\u7b56\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserProfileActivity extends AppCompatActivity {\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\u3042\u308a\n    private void badExample() {\n        apiService.getUserProfile()\n            .subscribeOn(Schedulers.io())\n            .observeOn(AndroidSchedulers.mainThread())\n            .subscribe(\n                profile -&gt; updateUI(profile),\n                error -&gt; handleError(error)\n            );\n    }\n\n    \/\/ \u826f\u3044\u4f8b\uff1aCompositeDisposable\u3092\u4f7f\u7528\u3057\u305f\u9069\u5207\u306a\u7ba1\u7406\n    private final CompositeDisposable disposables = new CompositeDisposable();\n\n    private void goodExample() {\n        disposables.add(\n            apiService.getUserProfile()\n                .subscribeOn(Schedulers.io())\n                .observeOn(AndroidSchedulers.mainThread())\n                .subscribe(\n                    profile -&gt; updateUI(profile),\n                    error -&gt; handleError(error)\n                )\n        );\n    }\n\n    @Override\n    protected void onDestroy() {\n        super.onDestroy();\n        disposables.clear(); \/\/ \u3059\u3079\u3066\u306e\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u89e3\u9664\n    }\n}\n\n\/\/ \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u5bfe\u5fdc\u306e\u5b9f\u88c5\u4f8b\npublic class UserViewModel extends ViewModel {\n    private final CompositeDisposable disposables = new CompositeDisposable();\n    private final BehaviorSubject&lt;UserProfile&gt; profileSubject = BehaviorSubject.create();\n\n    public void loadProfile() {\n        disposables.add(\n            apiService.getUserProfile()\n                .subscribeOn(Schedulers.io())\n                .observeOn(AndroidSchedulers.mainThread())\n                .subscribe(\n                    profile -&gt; profileSubject.onNext(profile),\n                    error -&gt; handleError(error)\n                )\n        );\n    }\n\n    @Override\n    protected void onCleared() {\n        disposables.clear();\n        super.onCleared();\n    }\n}<\/pre>\n\n\n\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u9632\u6b62\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>CompositeDisposable<\/code>\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u89e3\u653e<\/li>\n\n\n\n<li>WeakReference\u306e\u6d3b\u7528\uff08\u5fc5\u8981\u306a\u5834\u5408\uff09<\/li>\n\n\n\n<li>AutoDispose\u306e\u5c0e\u5165\u691c\u8a0e<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u8907\u96d1\u306a\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u30c1\u30a7\u30fc\u30f3\u306e\u8a2d\u8a08\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u30c1\u30a7\u30fc\u30f3\u304c\u8907\u96d1\u306b\u306a\u308b\u3068\u3001\u53ef\u8aad\u6027\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u8907\u96d1\u3067\u7406\u89e3\u3057\u306b\u304f\u3044\u30c1\u30a7\u30fc\u30f3\nObservable.just(1, 2, 3, 4, 5)\n    .flatMap(n -&gt; Observable.just(n * 2))\n    .map(n -&gt; n + 1)\n    .filter(n -&gt; n % 2 == 0)\n    .flatMap(n -&gt; \n        Observable.just(n)\n            .map(v -&gt; v.toString())\n            .map(s -&gt; \"Value: \" + s)\n    )\n    .subscribe(System.out::println);\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u9069\u5207\u306b\u5206\u5272\u3055\u308c\u305f\u51e6\u7406\npublic class DataProcessor {\n    \/\/ \u5909\u63db\u30ed\u30b8\u30c3\u30af\u3092\u5206\u5272\n    private Observable&lt;Integer&gt; multiplyByTwo(Integer n) {\n        return Observable.just(n * 2);\n    }\n\n    private Observable&lt;String&gt; formatValue(Integer n) {\n        return Observable.just(n)\n            .map(v -&gt; v.toString())\n            .map(s -&gt; \"Value: \" + s);\n    }\n\n    public Observable&lt;String&gt; processData() {\n        return Observable.just(1, 2, 3, 4, 5)\n            .flatMap(this::multiplyByTwo)\n            .map(n -&gt; n + 1)\n            .filter(n -&gt; n % 2 == 0)\n            .flatMap(this::formatValue);\n    }\n}<\/pre>\n\n\n\n<p>\u8907\u96d1\u306a\u30c1\u30a7\u30fc\u30f3\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u51e6\u7406\u306e\u8ad6\u7406\u7684\u306a\u5206\u5272<\/li>\n\n\n\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u62bd\u51fa\u3068\u518d\u5229\u7528<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u547d\u540d\u306b\u3088\u308b\u610f\u56f3\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306e\u9069\u7528<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u624b\u6cd5<\/h3>\n\n\n\n<p>RxJava\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u30c6\u30b9\u30c8\u306f\u3001\u975e\u540c\u671f\u51e6\u7406\u306e\u6027\u8cea\u4e0a\u3001\u7279\u5225\u306a\u8003\u616e\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService {\n    private final ApiClient apiClient;\n    private final Scheduler ioScheduler;\n    private final Scheduler mainScheduler;\n\n    \/\/ \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u6ce8\u5165\u53ef\u80fd\u306b\u3059\u308b\n    public UserService(\n        ApiClient apiClient,\n        Scheduler ioScheduler,\n        Scheduler mainScheduler\n    ) {\n        this.apiClient = apiClient;\n        this.ioScheduler = ioScheduler;\n        this.mainScheduler = mainScheduler;\n    }\n\n    public Observable&lt;User&gt; getUser(String id) {\n        return apiClient.getUser(id)\n            .subscribeOn(ioScheduler)\n            .observeOn(mainScheduler);\n    }\n}\n\n\/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\npublic class UserServiceTest {\n    @Test\n    public void testGetUser() {\n        \/\/ \u30c6\u30b9\u30c8\u7528\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\n        TestScheduler testScheduler = new TestScheduler();\n\n        \/\/ \u30e2\u30c3\u30afAPI\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\n        ApiClient mockClient = mock(ApiClient.class);\n        User expectedUser = new User(\"1\", \"Test User\");\n        when(mockClient.getUser(\"1\"))\n            .thenReturn(Observable.just(expectedUser));\n\n        \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30b5\u30fc\u30d3\u30b9\n        UserService service = new UserService(\n            mockClient,\n            testScheduler,\n            testScheduler\n        );\n\n        \/\/ \u30c6\u30b9\u30c8\u5b9f\u884c\n        TestObserver&lt;User&gt; testObserver = service.getUser(\"1\")\n            .test();\n\n        \/\/ \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u9032\u3081\u308b\n        testScheduler.triggerActions();\n\n        \/\/ \u691c\u8a3c\n        testObserver.assertValue(expectedUser)\n            .assertComplete()\n            .assertNoErrors();\n    }\n}<\/pre>\n\n\n\n<p>\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u4f5c\u6210\u306e\u305f\u3081\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u6027\u306e\u6ce8\u5165<\/li>\n\n\n\n<li>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u5916\u90e8\u5316<\/li>\n\n\n\n<li>TestScheduler\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>TestObserver\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30e2\u30c3\u30af\u3068\u30b9\u30bf\u30d6\u306e\u9069\u5207\u306a\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u554f\u984c\u70b9\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u89e3\u6c7a\u7b56\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306aRxJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u901a\u3058\u3066RxJava\u306e\u5c0e\u5165\u624b\u9806\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-21\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076RxJava \u5c0e\u5165\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n<p>RxJava\u3092\u65e2\u5b58\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5c0e\u5165\u3059\u308b\u969b\u306f\u3001\u6bb5\u968e\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u624b\u9806\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5c0e\u5165\u624b\u9806\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u307e\u305a\u3001RxJava\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5c0e\u5165\u3059\u308b\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u624b\u9806\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f9d\u5b58\u95a2\u4fc2\u306e\u8ffd\u52a0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">dependencies {\n    \/\/ RxJava\u672c\u4f53\n    implementation 'io.reactivex.rxjava3:rxjava:3.x.x'\n\n    \/\/ Android\u30b5\u30dd\u30fc\u30c8\uff08\u5fc5\u8981\u306a\u5834\u5408\uff09\n    implementation 'io.reactivex.rxjava3:rxandroid:3.x.x'\n\n    \/\/ RxJava\u3068Retrofit\u306e\u9023\u643a\uff08API\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u5834\u5408\uff09\n    implementation 'com.squareup.retrofit2:adapter-rxjava3:2.x.x'\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u306e\u4f5c\u6210<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RxUtils {\n    private static final CompositeDisposable globalDisposables = new CompositeDisposable();\n\n    \/\/ \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u63d0\u4f9b\n    public static &lt;T&gt; ObservableTransformer&lt;T, T&gt; applySchedulers() {\n        return upstream -&gt; upstream\n            .subscribeOn(Schedulers.io())\n            .observeOn(AndroidSchedulers.mainThread());\n    }\n\n    \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5171\u901a\u5316\n    public static &lt;T&gt; ObservableTransformer&lt;T, T&gt; applyErrorHandler() {\n        return upstream -&gt; upstream\n            .doOnError(throwable -&gt; Log.e(\"RxError\", \"Error occurred\", throwable))\n            .retry(3)\n            .onErrorResumeNext(Observable.empty());\n    }\n\n    \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u306aDisposable\u7ba1\u7406\n    public static void addDisposable(Disposable disposable) {\n        globalDisposables.add(disposable);\n    }\n\n    public static void clearDisposables() {\n        globalDisposables.clear();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u65e2\u5b58\u30b3\u30fc\u30c9\u304b\u3089\u306e\u6bb5\u968e\u7684\u306a\u79fb\u884c\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092RxJava\u306b\u79fb\u884c\u3059\u308b\u969b\u306e\u5b9f\u8df5\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u79fb\u884c\u524d\uff1a\u5f93\u6765\u306e\u975e\u540c\u671f\u51e6\u7406\npublic class LegacyUserRepository {\n    public void getUser(String userId, Callback&lt;User&gt; callback) {\n        new AsyncTask&lt;String, Void, User&gt;() {\n            @Override\n            protected User doInBackground(String... params) {\n                return api.getUser(params[0]);\n            }\n\n            @Override\n            protected void onPostExecute(User user) {\n                callback.onSuccess(user);\n            }\n\n            @Override\n            protected void onError(Exception e) {\n                callback.onError(e);\n            }\n        }.execute(userId);\n    }\n}\n\n\/\/ \u79fb\u884c\u5f8c\uff1aRxJava\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\npublic class ModernUserRepository {\n    public Observable&lt;User&gt; getUser(String userId) {\n        return Observable.fromCallable(() -&gt; api.getUser(userId))\n            .compose(RxUtils.applySchedulers())\n            .compose(RxUtils.applyErrorHandler());\n    }\n}\n\n\/\/ \u6bb5\u968e\u7684\u306a\u79fb\u884c\u306e\u305f\u3081\u306e\u6a4b\u6e21\u3057\u30af\u30e9\u30b9\npublic class UserRepositoryBridge {\n    private final ModernUserRepository modernRepo;\n    private final CompositeDisposable disposables = new CompositeDisposable();\n\n    public void getUser(String userId, Callback&lt;User&gt; callback) {\n        disposables.add(\n            modernRepo.getUser(userId)\n                .subscribe(\n                    user -&gt; callback.onSuccess(user),\n                    error -&gt; callback.onError(error)\n                )\n        );\n    }\n\n    public void cleanup() {\n        disposables.clear();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u5b9f\u88c5\u4f8b\u304b\u3089\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3076<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u3001RxJava\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class BestPracticeExample {\n    \/\/ 1. \u30b7\u30f3\u30d7\u30eb\u306a\u5909\u63db\u51e6\u7406\n    public Observable&lt;UserDTO&gt; convertUser(User user) {\n        return Observable.just(user)\n            .map(this::convertToDTO)\n            .subscribeOn(Schedulers.computation());\n    }\n\n    \/\/ 2. \u8907\u6570\u306e\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u306e\u7d71\u5408\n    public Observable&lt;UserProfile&gt; createUserProfile(String userId) {\n        Observable&lt;User&gt; user = userRepository.getUser(userId);\n        Observable&lt;List&lt;Order&gt;&gt; orders = orderRepository.getUserOrders(userId);\n        Observable&lt;Settings&gt; settings = settingsRepository.getUserSettings(userId);\n\n        return Observable.zip(user, orders, settings,\n            (u, o, s) -&gt; new UserProfile(u, o, s))\n            .compose(RxUtils.applySchedulers());\n    }\n\n    \/\/ 3. \u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u306e\u5b9f\u88c5\n    private final BehaviorSubject&lt;User&gt; userCache = BehaviorSubject.create();\n\n    public Observable&lt;User&gt; getCachedUser(String userId) {\n        return Observable.defer(() -&gt; {\n            if (userCache.hasValue()) {\n                return userCache.take(1);\n            }\n            return userRepository.getUser(userId)\n                .doOnNext(user -&gt; userCache.onNext(user));\n        });\n    }\n\n    \/\/ 4. \u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u306e\u5236\u5fa1\n    public Flowable&lt;SearchResult&gt; search(Observable&lt;String&gt; searchQueries) {\n        return searchQueries\n            .toFlowable(BackpressureStrategy.LATEST)\n            .debounce(300, TimeUnit.MILLISECONDS)\n            .distinctUntilChanged()\n            .flatMap(query -&gt; performSearch(query));\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u5b66\u3076<\/h3>\n\n\n\n<p>RxJava\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u52b9\u679c\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class CodingStyleExample {\n    \/\/ 1. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u9069\u5207\u306a\u6539\u884c\n    private Observable&lt;Result&gt; processData(Data data) {\n        return Observable.just(data)\n            .map(this::validateData)\n            .flatMap(this::enrichData)\n            .filter(this::isDataValid)\n            .map(this::convertToResult)\n            .compose(RxUtils.applySchedulers());\n    }\n\n    \/\/ 2. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30d1\u30bf\u30fc\u30f3\n    private Observable&lt;Result&gt; safeProcessData(Data data) {\n        return processData(data)\n            .onErrorResumeNext(error -&gt; {\n                if (error instanceof ValidationException) {\n                    return Observable.just(Result.invalid());\n                }\n                return Observable.error(error);\n            })\n            .doOnError(this::logError)\n            .doOnComplete(this::logSuccess);\n    }\n\n    \/\/ 3. \u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u30d1\u30bf\u30fc\u30f3\n    private final CompositeDisposable disposables = new CompositeDisposable();\n\n    public void startProcessing() {\n        disposables.add(\n            Observable.interval(1, TimeUnit.MINUTES)\n                .flatMap(tick -&gt; processData(new Data()))\n                .subscribe(\n                    this::handleResult,\n                    this::handleError\n                )\n        );\n    }\n\n    public void stopProcessing() {\n        disposables.clear();\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u53c2\u8003\u306b\u3001\u6bb5\u968e\u7684\u306bRxJava\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u79fb\u884c\u3068\u52b9\u679c\u7684\u306a\u6d3b\u7528\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u30c1\u30fc\u30e0\u306e\u7406\u89e3\u5ea6\u306b\u5408\u308f\u305b\u3066\u6bb5\u968e\u7684\u306b\u5c0e\u5165\u3092\u9032\u3081\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3084\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u901a\u3058\u3066\u77e5\u8b58\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; 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