{"id":62,"date":"2017-02-14T22:03:04","date_gmt":"2017-02-14T14:03:04","guid":{"rendered":"http:\/\/himmel.tech\/wp\/?p=62"},"modified":"2017-02-14T22:06:35","modified_gmt":"2017-02-14T14:06:35","slug":"%e5%bc%80%e5%8f%91%e6%97%a5%e5%bf%97-170214","status":"publish","type":"post","link":"https:\/\/himmel.tech\/wp\/?p=62","title":{"rendered":"\u5f00\u53d1\u65e5\u5fd7 170214"},"content":{"rendered":"<p>\u6069\uff0c\u7b2c\u4e00\u6b21\u5199\u5f00\u53d1\u65e5\u5fd7\u3002<\/p>\n<p>\u5b89\u5353\u7684\u9879\u76ee\uff0c\u6bd5\u8bbe\u7684\u4e00\u90e8\u5206\uff0c\u667a\u80fd\u5c0f\u8239\u9065\u63a7\u5668\u3002\u76ee\u524d\u4e24\u8fb9\u5df2\u7ecf\u53ef\u4ee5ping\u901a\u4e86\uff0c\u5ef6\u8fdf\u8ba1\u7b97\u4e5f\u53ef\u4ee5\u4e86\uff0c\u6d88\u606f\u961f\u5217\u4e5f\u5b9e\u73b0\u4e86\u3002\u76ee\u524d\u4e00\u4e2a\u6ca1\u89e3\u51b3\u7684\u95ee\u9898\u662f\uff1a\u5982\u4f55\u4f18\u96c5\u7684\u7528int\u53d8\u91cf\u6807\u8bc6\u6d88\u606f\u7c7b\u578b\u3002\u53e6\u5916\uff0cping\u6d4b\u8bd5\u7684\u4ee3\u7801\u6709\u70b9\u7b80\u5355\u3002<\/p>\n<p>\u8fd8\u6709\u5c31\u662f\u4e00\u4e2a\u6570\u636e\u6821\u9a8c\u7684\u95ee\u9898\u3002\u5b89\u5168\u6027\u5e94\u8be5\u662f\u4e0d\u592a\u9700\u8981\u62c5\u5fc3\uff0c\u56e0\u4e3aWiFI\u6709WPA2\u4fdd\u62a4\u4e86\uff0c\u56e0\u6b64\u6211\u6ca1\u7528\u52a0\u5bc6\u3002\u4e0d\u8fc7\u4fe1\u53f7\u5f88\u5dee\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u4f1aGG\uff0c\u56e0\u6b64\u53ef\u80fd\u9700\u8981\u8fdb\u884c\u5b8c\u6574\u6027\u6821\u9a8c\uff1f<\/p>\n<p>zhc\u8bf4\u4e0d\u9700\u8981\uff0c\u56e0\u4e3aWPA\u4fdd\u8bc1\u4e86\u7269\u7406\u5c42\u4f20\u8f93\u7684\u5b8c\u6574\u6027\u3002\u6b64\u4e8b\u6682\u4e14\u7559\u5f85\u4ee5\u540e\u89e3\u51b3\uff08\u5b9e\u5728\u4e0d\u884c\u5c31\u5728\u6700\u540e\u52a0\u4e0a1Byte\u7684\u7d2f\u52a0\u548c\u6821\u9a8c\uff09\u3002<\/p>\n<p><!--more--><\/p>\n<h2>\u5751<\/h2>\n<p>\u5148\u8bf4\u8bf4\u8fd9\u51e0\u5929\u8e29\u5230\u7684\u5751\uff1a<\/p>\n<h3>\u4e3b\u7ebf\u7a0b\u4e0d\u80fd\u8fdb\u884c\u7f51\u7edcIO\u7b49\u64cd\u4f5c<\/h3>\n<p>\u6700\u5f00\u59cb\u5199\u539f\u578b\u7684\u65f6\u5019\uff0c\u4e0d\u51c6\u5907\u641e\u592a\u9ebb\u70e6\uff0c\u5148\u5199\u4e2aping\u7a0b\u5e8f\u8bd5\u8bd5\u3002OK\u8bf4\u5e72\u5c31\u5e72\uff0c\u5728onCreate\u91cc\u9762\u5199\u4e86\u4e2aUDP\u53d1\u5305\uff0c\u7136\u540e\u7a0b\u5e8f\u5d29\u6e83\u4e86\uff0c\u8f93\u51fa\u4e86\u4e00\u5927\u5806\u4e1c\u897f\u3002<del> \u8fd9\u4e48\u4e00\u5927\u5806\u4e1c\u897f\u8c01\u4f1a\u4ed4\u7ec6\u770b\u554a\u5582\uff01<\/del><\/p>\n<p>\u4e8e\u662f\u5f00\u59cb\u767e\u5ea6\uff0c\u65e0\u679c\uff0c\u4ed4\u7ec6\u770b\u65e5\u5fd7\uff0c\u5ffd\u7565\u4e86\u90a3\u4e00\u5927\u5806\u641e\u4e0d\u660e\u767d\u7684at xxx balabala\uff0c\u770b\u5230android.os.NetworkOnMainThreadException\u3002OK\uff0c\u611f\u60c5Google\u76f4\u63a5\u7981\u6b62\u4e86\u5728UI\u7ebf\u7a0b\u6267\u884c\u7f51\u7edc\u64cd\u4f5c\u4e86\uff0c\u96be\u602a\u4f1aGG\uff0c\u65b0\u5f00\u4e00\u4e2a\u7ebf\u7a0b\u597d\u4e86\u2026\u2026\u3002<\/p>\n<h3>\u975e\u4e3b\u7ebf\u7a0b\u4e0d\u80fd\u8fdb\u884cUI\u66f4\u65b0\u64cd\u4f5c<\/h3>\n<p>\u7136\u540e\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\uff0c\u4e22\u4e86\u4e00\u4e2aTextView\u8fdb\u53bb\uff0c\u7f51\u7edcIO\u7ed3\u675f\u4e4b\u540e\u8ba9\u5b50\u7ebf\u7a0b\u66f4\u65b0UI\u3002\u597d\u4e86\uff0c\u8fd9\u4e0b\u53c8\u6765\u4e86\uff1a<\/p>\n<p>android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.<\/p>\n<p>Android\u5b98\u65b9\u662f\u8fd9\u4e48\u8bf4\u7684\uff1a<\/p>\n<p>\u201cThe Android UI toolkit is <strong>not thread-safe<\/strong> and the view must always be manipulated on the UI thread.\u201d<\/p>\n<p>\u6069\uff0c\u597d\u5427\u2026\u2026<\/p>\n<p>\u6b63\u7ecf\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u6d88\u606f\u961f\u5217\u3002\u4e0d\u8fc7\u5462\u4e5f\u6709\u529e\u6cd5\u5728\u975e\u4e3b\u7ebf\u7a0b\u66f4\u65b0UI\uff0cActivity.runOnUiThread\u6216View.post\uff0c\u5b89\u5168\u6027\u6211\u6682\u65f6\u8fd8\u6ca1\u7814\u7a76\u3002\u5177\u4f53\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">runOnUiThread(new Runnable()\r\n{\r\n    \/\/\u66f4\u65b0UI  \r\n    @Override\r\n    public void run() {\r\n        \/\/ TODO Auto-generated method stub\r\n        btn.setText(\"runOnUiThread\u5b50\u7ebf\u7a0b\u4e00\");\r\n    }                    \r\n});\r\nview.post(new Runnable(){\r\n    @Override\r\n    public void run() {\r\n        view.setText(\"No Reply!\");\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u5c0f\u77e5\u8bc6<\/h2>\n<h3>\u8bbe\u5b9aDatagramSocket.receive\u7684\u8d85\u65f6\u65f6\u95f4<\/h3>\n<p>\u4f7f\u7528udp2boat.setSoTimeout();\u8fd9\u4e2a\u51fd\u6570\uff0c\u5f53DatagramSocket.receive()\u8d85\u65f6\u7684\u65f6\u5019\uff0c\u4f1a\u629b\u51faSocketTimeoutException\u8fd9\u4e2a\u5f02\u5e38\u3002\u5904\u7406\u8fd9\u4e2a\u5f02\u5e38\u5c31\u884c\u4e86\u3002<\/p>\n<h3>MessageQueue\u673a\u5236\u7684\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<p>\u8981\u4f7f\u7528\u6d88\u606f\u5faa\u73af\uff0c\u9700\u8981\u4e09\u4e2a\u7c7b\uff1aMessage, Looper, Handler\u3002\u6211\u4eec\u5728\u9700\u8981\u63a5\u53d7\u6d88\u606f\u7684\u7ebf\u7a0b\u4e2d\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">Looper.prepare();\r\nmHandler = new Handler() {\r\n    public void handleMessage(Message msg) {\r\n        \/\/ process incoming messages here\r\n\r\n    }\r\n};\r\n\r\nLooper.loop();<\/pre>\n<p>\u7136\u540e\u5728\u53d1\u9001\u6d88\u606f\u7684\u7ebf\u7a0b\u4e2d\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">childThread.mHandler.sendMessage(msg);\r\n<\/pre>\n<p>\u5c31\u53ef\u4ee5\u4e86\uff0c\u5f53\u7136sendMessage\u8fd8\u6709\u4e00\u4e9b\u53d8\u79cd\uff0c\u4ee5\u540e\u518d\u7814\u7a76\u3002<\/p>\n<h2>\u7591\u95ee<\/h2>\n<p>Android.os.Message\u91cc\u9762\uff0c\u6709int arg1, arg2, what; Object obj;\u8fd9\u6837\u51e0\u4e2a\u7528\u6765\u4f20\u6d88\u606f\u7684\u5b57\u6bb5\uff0c\u6839\u636e\u5b98\u65b9\u7684\u89e3\u91ca\uff0carg1 arg2\u7528\u4e8e\u5b58\u50a8\u5c11\u91cf\u6570\u636e\uff0cobj\u7528\u4e8e\u4f20\u9001\u5927\u91cf\u6570\u636e\uff0cwhat\u7528\u6765\u6807\u8bc6\u6d88\u606f\u7c7b\u578b\u3002<\/p>\n<p>\u4f46\u662f\u4e0d\u50cfC++\u7684\u65f6\u5019\uff0cenum\u53ef\u4ee5\u81ea\u52a8\u8f6c\u6362\u4e3aint\uff0c\u6240\u4ee5\u9664\u4e86\u624b\u52a8\u7ef4\u62a4\u4e00\u4efd\u201c\u6d88\u606f-\u6d88\u606f\u542b\u4e49\u201d\u5217\u8868\uff0c\u6709\u6ca1\u6709\u4f18\u96c5\u4e00\u70b9\u7684\u65b9\u6cd5\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1f<\/p>\n<p>\u5df2\u5728\u77e5\u4e4e\u63d0\u95ee\uff1a<a href=\"https:\/\/www.zhihu.com\/question\/55813767\">https:\/\/www.zhihu.com\/question\/55813767<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6069\uff0c\u7b2c\u4e00\u6b21\u5199\u5f00\u53d1\u65e5\u5fd7\u3002 \u5b89\u5353\u7684\u9879\u76ee\uff0c\u6bd5\u8bbe\u7684\u4e00\u90e8\u5206\uff0c\u667a\u80fd\u5c0f\u8239\u9065\u63a7\u5668\u3002\u76ee\u524d\u4e24\u8fb9\u5df2\u7ecf\u53ef\u4ee5ping\u901a\u4e86\uff0c\u5ef6\u8fdf\u8ba1\u7b97\u4e5f\u53ef\u4ee5 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/himmel.tech\/wp\/?p=62\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201c\u5f00\u53d1\u65e5\u5fd7 170214\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2],"tags":[],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-development-diary"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p83CFH-10","_links":{"self":[{"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=62"}],"version-history":[{"count":6,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":68,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions\/68"}],"wp:attachment":[{"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/himmel.tech\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}