{"id":725,"date":"2023-03-09T17:13:22","date_gmt":"2023-03-09T08:13:22","guid":{"rendered":"https:\/\/www.dogrow.net\/android\/?p=725"},"modified":"2023-03-10T17:34:26","modified_gmt":"2023-03-10T08:34:26","slug":"blog37","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/android\/blog37\/","title":{"rendered":"(37) Android\uff0bJava\u3067\u30b9\u30ec\u30c3\u30c9\u3092\u4f7f\u3046\u5834\u5408\u306e\u3044\u308d\u3044\u308d"},"content":{"rendered":"

1. \u3084\u308a\u305f\u3044\u3053\u3068<\/h1>\n

Android\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u5236\u7d04\u3092\u610f\u8b58\u3057\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u3044\u3053\u3068\u3092\u77e5\u3063\u305f\u3002
\n\u5236\u7d04 : UI\u63cf\u753b\u51e6\u7406\u306f\u3001\u30a2\u30d7\u30ea\u306e\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u4e0a\u3067\u306e\u307f\u5b9f\u884c\u3067\u304d\u308b\u3002<\/span><\/p>\n

\u53f3\u5f80\u5de6\u5f80\u3057\u305f\u306e\u3067\u3001\u5c11\u3057\u6574\u7406\u3057\u3066\u304a\u304f\u3002<\/p>\n

2. \u3084\u3063\u3066\u307f\u308b<\/h1>\n

\u5f8c\u3067\u3044\u308d\u3044\u308d\u3068\u6574\u7406\u3059\u308b\u3002<\/span><\/p>\n

Thread1 : Handler\u3092\u4f5c\u6210\u30021\u79d2\u3054\u3068\u306b Main thread\u306e Looper\u306b post\u3059\u308b\u3002
\nThread2 : Handler\u3092\u4f5c\u6210\u30021\u56de\u3060\u3051 Main thread\u306e Looper\u306b post\u3059\u308b\u3002run()\u5185\u90e8\u30671\u79d2\u9593 sleep\u3057\u306a\u304c\u3089\u51e6\u7406\u3092\u7e70\u308a\u8fd4\u3057\u3002
\nThread3 : Sub thread\u3092\u4f5c\u6210\u3002run()\u5185\u90e8\u30671\u79d2\u9593 sleep\u3057\u306a\u304c\u3089\u51e6\u7406\u3092\u7e70\u308a\u8fd4\u3057\u3002<\/p>\n

\u30fbThread2\u306f\u3001Handler\u3092\u4f7f\u3063\u3066 Main thread\u306e Looper\u306b Post\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u51e6\u7406\u4e2d\u306f Main thread\u3092\u5360\u6709\u3059\u308b\u3002
\n\u3000\u2192 Thread1\u306e\u51e6\u7406\u306f\u52d5\u3051\u306a\u3044\u3002<\/p>\n

\u30fbThread3\u306f\u3001Main thread\u3068\u306f\u5225\u306b Sub thread\u3092\u8d77\u52d5\u3057\u3066\u3044\u308b\u3002
\n\u3000\u2192 Thread2\u3068\u4e26\u884c\u3057\u3066\u52d5\u3051\u308b\u3002
\n\u3000\u2192 \u305f\u3060\u3057\u3001Main thread\u3067\u306f\u306a\u3044\u305f\u3081\u3001Android UI\u306e\u5236\u5fa1\u304c\u3067\u304d\u306a\u3044\u3002
\n\u3000\u3000\u2192 Thread3\u304b\u3089 Main thread\u306e Looper\u306b UI\u5236\u5fa1\u306e Runnable\u3092 Post\u3057\u3066\u3044\u308b\u3002<\/p>\n

\u30fbThread1\u3068 Thread3\u306f\u5225\u30b9\u30ec\u30c3\u30c9\u306a\u306e\u3067\u3001Semaphore\u3067\u5f85\u3061\u5408\u308f\u305b\u304c\u3067\u304d\u308b\u3002<\/p>\n

\u30fbHandler.post \u306f Handler\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u305f\u30b9\u30ec\u30c3\u30c9\u306b\u5bfe\u3057\u3066 Runnable\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u9001\u308b\u3002<\/p>\n

\u30fbHandler\u306f 1\u30b9\u30ec\u30c3\u30c9\u306b 1\u500b\u3067\u3088\u3044\u3002
\n\u3000\u2192 Main thread\u306b\u51e6\u7406\u3092 post\u3057\u305f\u3044\u5834\u5408\u3001Main thread\u7528\u306b\u4e00\u3064 Handler\u3092\u751f\u6210\u3059\u308b\u3001\u3002
\n\u3000\u3000\u2192 \u3059\u3079\u3066\u306e Runnable\u306f\u305d\u3053\u3092\u6307\u5b9a\u3057\u3066 post\u3059\u308b\u3002<\/p>\n

\r\npackage com.example.testthread;\r\n\r\nimport androidx.appcompat.app.AppCompatActivity;\r\n\r\nimport android.os.Bundle;\r\nimport android.os.Handler;\r\nimport android.widget.TextView;\r\n\r\nimport java.util.concurrent.Semaphore;\r\n\r\npublic class MainActivity extends AppCompatActivity {\r\n    private Semaphore smph = new Semaphore(1);\r\n    private final Handler hMainThread = new Handler();\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_main);\r\n\r\n        this.hMainThread.post(this.runThread1);\r\n        this.hMainThread.post(this.runThread2);\r\n        this.RunSubThread3();\r\n    }\r\n\r\n    \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n    \/\/ Thread1\r\n\r\n    private final Runnable runThread1 = new Runnable() {\r\n        private int i = 0;\r\n        @Override\r\n        public void run() {\r\n            System.out.println("Thread1.START (" + i + ")>>>================================");\r\n            try {\r\n                smph.acquire();\r\n                \/\/ Do something...\r\n                smph.release();\r\n            }catch(InterruptedException e){\r\n                e.printStackTrace();\r\n            }\r\n            hMainThread.postDelayed(this, 1000);\r\n            System.out.println("Thread1.END <<<==================================");\r\n            this.i++;\r\n        }\r\n    };\r\n\r\n    \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n    \/\/ Thread2\r\n    private final Runnable runThread2 = new Runnable() {\r\n        @Override\r\n        public void run() {\r\n\/*\r\nMain thread\u306e Looper\u306b Post\u3055\u308c\u305f\u51e6\u7406\r\n\u3000\u2192 Main thread\u306b queueing\u3055\u308c\u305f\u51e6\u7406\r\n\u3000\u3000\u2192 Main thread\u306e\u7a7a\u304d\u5f85\u3061\u5f8c\u306b\u5b9f\u884c\u3055\u308c\u308b\u3002*\/\r\n            for(int i = 0 ; i < 10 ; i++) {\r\n                System.out.println("Thread2.START >>>*******************************");\r\n                try {\r\n                    Thread.sleep(1000);\r\n                } catch (InterruptedException e) {\r\n                    e.printStackTrace();\r\n                }\r\n                System.out.println("Thread2.END <<<*********************************");\r\n            }\r\n        }\r\n    };\r\n\r\n    \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\r\n    \/\/ Thread3\r\n    private final Runnable runThread3B = new Runnable() {\r\n        \/\/ Sub thread\u304b\u3089 Main thread\u306b Post\u3055\u308c\u3066\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\r\n        @Override\r\n        public void run() {\r\n            TextView tv = findViewById(R.id.tv_1);\r\n            tv.setText("Thread3 Done!");\r\n        }\r\n    };\r\n    private final Runnable runThread3 = new Runnable() {\r\n        @Override\r\n        public void run() {\r\n            for (int i = 0; i < 10; i++) {\r\n                if(i == 3){\r\n                    try {\r\n                        smph.acquire();\r\n                    }catch(InterruptedException e){\r\n                        e.printStackTrace();\r\n                    }\r\n                }\r\n                if(i == 8){\r\n                    smph.release();\r\n                }\r\n                System.out.println("Thread3.START (" + i + ")>>>------------------------------");\r\n                try {\r\n                    Thread.sleep(1000);\r\n                } catch (InterruptedException e) {\r\n                    e.printStackTrace();\r\n                }\r\n                System.out.println("Thread3.END <<<--------------------------------");\r\n            }\r\n            \/\/ \u3053\u3053\u3067 UI\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u4f8b\u5916\u767a\u751f\uff01 \u2192 Main thread\u306b handle\u3092 post\u3059\u308b\u3002\r\n            \/\/TextView tv = findViewById(R.id.tv_1);\r\n            \/\/tv.setText("Thread3 Done!");\r\n            hMainThread.post(runThread3B);\r\n        }\r\n    };\r\n    private void RunSubThread3() {\r\n        Thread thread3 = new Thread(runThread3);\r\n        thread3.start();\r\n    }\r\n}\r\n<\/pre>\n
\n","protected":false},"excerpt":{"rendered":"
1. \u3084\u308a\u305f\u3044\u3053\u3068 Android\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u5236\u7d04\u3092\u610f\u8b58\u3057\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u3044\u3053\u3068\u3092\u77e5\u3063\u305f\u3002 \u5236\u7d04 : UI\u63cf\u753b\u51e6\u7406\u306f\u3001\u30a2\u30d7\u30ea\u306e\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u4e0a\u3067\u306e\u307f\u5b9f\u884c\u3067\u304d\u308b\u3002 \u53f3\u5f80\u5de6\u5f80\u3057\u305f\u306e\u3067\u3001\u5c11\u3057\u6574\u7406\u3057\u3066\u2026 \u7d9a\u304d\u3092\u8aad\u3080 »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,15,7],"tags":[],"class_list":["post-725","post","type-post","status-publish","format-standard","hentry","category-androidstudio","category-java","category-7"],"views":732,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/comments?post=725"}],"version-history":[{"count":18,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/725\/revisions"}],"predecessor-version":[{"id":744,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/725\/revisions\/744"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/media?parent=725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/categories?post=725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/tags?post=725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}