{"id":391,"date":"2023-02-25T08:46:22","date_gmt":"2023-02-25T00:46:22","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=391"},"modified":"2023-04-30T14:37:47","modified_gmt":"2023-04-30T06:37:47","slug":"rxjava2-learning-3-scheduler-thread-control","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/25\/rxjava2-learning-3-scheduler-thread-control\/","title":{"rendered":"RxJava2\u5b66\u4e60\u4e4b\u4e09\uff1aScheduler\u7ebf\u7a0b\u63a7\u5236"},"content":{"rendered":"<h2>Scheduler\u7ebf\u7a0b\u7c7b\u578b<\/h2>\n<h3>Schedulers.immediate()<\/h3>\n<p>\u76f4\u63a5\u5728\u5f53\u524d\u7ebf\u7a0b\u8fd0\u884c\uff0c\u76f8\u5f53\u4e8e\u4e0d\u6307\u5b9a\u7ebf\u7a0b\u3002\u8fd9\u662f\u9ed8\u8ba4\u7684 Scheduler\u3002<\/p>\n<p><!-- more --><\/p>\n<h3>Schedulers.newThread()<\/h3>\n<p>\u603b\u662f\u542f\u7528\u65b0\u7ebf\u7a0b\uff0c\u5e76\u5728\u65b0\u7ebf\u7a0b\u6267\u884c\u64cd\u4f5c\u3002<\/p>\n<h3>Schedulers.io()<\/h3>\n<p>I\/O \u64cd\u4f5c\uff08\u8bfb\u5199\u6587\u4ef6\u3001\u8bfb\u5199\u6570\u636e\u5e93\u3001\u7f51\u7edc\u4fe1\u606f\u4ea4\u4e92\u7b49\uff09\u6240\u4f7f\u7528\u7684 Scheduler\u3002\u884c\u4e3a\u6a21\u5f0f\u548c newThread() \u5dee\u4e0d\u591a\uff0c\u533a\u522b\u5728\u4e8e io() \u7684\u5185\u90e8\u5b9e\u73b0\u662f\u662f\u7528\u4e00\u4e2a\u65e0\u6570\u91cf\u4e0a\u9650\u7684\u7ebf\u7a0b\u6c60\uff0c\u53ef\u4ee5\u91cd\u7528\u7a7a\u95f2\u7684\u7ebf\u7a0b\uff0c\u56e0\u6b64\u591a\u6570\u60c5\u51b5\u4e0b io() \u6bd4 newThread() \u66f4\u6709\u6548\u7387\u3002\u4e0d\u8981\u628a\u8ba1\u7b97\u5de5\u4f5c\u653e\u5728 io() \u4e2d\uff0c\u53ef\u4ee5\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u7ebf\u7a0b\u3002<\/p>\n<h3>Schedulers.computation()<\/h3>\n<p>\u8ba1\u7b97\u6240\u4f7f\u7528\u7684 Scheduler\u3002\u8fd9\u4e2a\u8ba1\u7b97\u6307\u7684\u662f CPU \u5bc6\u96c6\u578b\u8ba1\u7b97\uff0c\u5373\u4e0d\u4f1a\u88ab I\/O \u7b49\u64cd\u4f5c\u9650\u5236\u6027\u80fd\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u56fe\u5f62\u7684\u8ba1\u7b97\u3002\u8fd9\u4e2a Scheduler \u4f7f\u7528\u7684\u56fa\u5b9a\u7684\u7ebf\u7a0b\u6c60\uff0c\u5927\u5c0f\u4e3a CPU \u6838\u6570\u3002\u4e0d\u8981\u628a I\/O \u64cd\u4f5c\u653e\u5728 computation() \u4e2d\uff0c\u5426\u5219 I\/O \u64cd\u4f5c\u7684\u7b49\u5f85\u65f6\u95f4\u4f1a\u6d6a\u8d39 CPU\u3002<\/p>\n<h3>AndroidSchedulers.mainThread()<\/h3>\n<p>\u5b83\u6307\u5b9a\u7684\u64cd\u4f5c\u5c06\u5728 Android \u4e3b\u7ebf\u7a0b\u8fd0\u884c\u3002<\/p>\n<h2>Scheduler\u7ebf\u7a0b\u63a7\u5236<\/h2>\n<ul>\n<li>observeOn() \u6307\u5b9a Subscriber \u7ebf\u7a0b<\/li>\n<li>subscribeOn() \u5236\u5b9a Observable \u7ebf\u7a0b<\/li>\n<\/ul>\n<p>Observable.doOnSubscribe()\u3002\u5b83\u548c Subscriber.onStart() \u540c\u6837\u662f\u5728 subscribe() \u8c03\u7528\u540e\u800c\u4e14\u5728\u4e8b\u4ef6\u53d1\u9001\u524d\u6267\u884c\uff0c\u4f46\u533a\u522b\u5728\u4e8e\u5b83\u53ef\u4ee5\u6307\u5b9a\u7ebf\u7a0b<\/p>\n<pre><code class=\"language-java\">public void scheduler(View view) {\n    Observable.create(new ObservableOnSubscribe&lt;User&gt;() {\n        \/\/\u4e3b\u7ebf\u7a0b\u91cc\u9762\u6267\u884c\n        @Override\n        public void subscribe(ObservableEmitter&lt;User&gt; e) throws Exception {\n            \/\/\u8bf7\u6c42\u7f51\u7edc\n            \/\/User user = new User(1, &quot;AndroidiOS.cc&quot;);\n            Retrofit retrofit = new Retrofit.Builder()\n                    .baseUrl(SERVER_ADDRESS)\n                    .addConverterFactory(GsonConverterFactory.create())\n                    .build();\n\n            api = retrofit.create(Api.class);\n\n            User user = api.getUserInfoWithPath(1).execute().body();\n            e.onNext(user);\n        }\n    }).subscribeOn(Schedulers.io())  \/\/\u5207\u6362\u5230IO\u7ebf\u7a0b\n    .observeOn(AndroidSchedulers.mainThread())  \/\/\u5207\u6362\u56deUI\u4e3b\u7ebf\u7a0b\n    .subscribe(new Observer&lt;User&gt;() {\n        @Override\n        public void onSubscribe(Disposable d) {\n\n        }\n\n        \/\/\u4e3b\u7ebf\u7a0b\u91cc\u9762\u6267\u884c\n        @Override\n        public void onNext(User user) {\n            Log.i(TAG, &quot;onNext: &quot; + user);\n            Toast.makeText(MainActivity.this, user.getUsername(), Toast.LENGTH_SHORT).show();\n        }\n\n        @Override\n        public void onError(Throwable e) {\n            e.printStackTrace();\n        }\n\n        @Override\n        public void onComplete() {\n            Log.i(TAG, &quot;onComplete: &quot;);\n        }\n    });\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Scheduler\u7ebf\u7a0b\u7c7b\u578b Schedulers.immediate() \u76f4\u63a5\u5728\u5f53\u524d\u7ebf\u7a0b\u8fd0\u884c\uff0c\u76f8\u5f53\u4e8e\u4e0d\u6307\u5b9a\u7ebf\u7a0b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[131],"tags":[132],"class_list":["post-391","post","type-post","status-publish","format-standard","hentry","category-rxjava","tag-rxjava"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=391"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/391\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}