{"id":35,"date":"2014-01-14T15:58:37","date_gmt":"2014-01-14T07:58:37","guid":{"rendered":"http:\/\/www.anthonylee.cn\/myblog\/?p=35"},"modified":"2018-03-08T16:15:30","modified_gmt":"2018-03-08T08:15:30","slug":"handlerloopermessagequeue","status":"publish","type":"post","link":"http:\/\/www.anthonylee.cn\/myblog\/?p=35","title":{"rendered":"Handler,Looper,MessageQueue"},"content":{"rendered":"<p>\u4e00\u3001Handler<br \/>\n1.\u5728\u8c03\u7528\u7ebf\u7a0b\uff0c\u4f7f\u7528<\/p>\n<pre><code>                    Message msg = handler.obtainMessage();<\/code><\/pre>\n<p>msg.obj = &#8220;ahahah&#8221;;<br \/>\nhandler.sendMessage(msg);<br \/>\n\u53d1\u9001\u6d88\u606f<\/p>\n<p>2.\u5728\u6267\u884c\u7ebf\u7a0b\uff0c\u5b9e\u4f8b\u5316Handler\u5bf9\u8c61\uff0c\u91cd\u5199handleMessage \u65b9\u6cd5\uff0c\u6267\u884c\u5177\u4f53\u64cd\u4f5c\u3002<\/p>\n<p>\u4e8cLooper<br \/>\n1.Looper.prepare\u65b9\u6cd5\u4e2d\uff0c\u5b9e\u4f8b\u5316\u4e00\u4e2alooper\uff08\u5305\u542bMseeageQueue\uff09\uff0c\u653e\u5230\u5168\u5c40\u7684sThreadLocal\u91cc\u9762\uff0c\u4e0e\u8fdb\u7a0b\u5bf9\u8c61\u5bf9\u5e94\u3002<br \/>\n2.\u5b9e\u4f8b\u5316handler\u65f6\uff0c\u83b7\u53d6\u4e0a\u9762\u7684looper\u8d4b\u503c\u7ed9\u81ea\u5df1\u7684mLooper\u5bf9\u8c61 \uff0c\u5e76\u83b7\u53d6mLooper\u4e2d\u7684MseeageQueue<br \/>\n3.Looper.loop\u65b9\u6cd5\uff0c\u4ece\u6d88\u606f\u961f\u5217\u83b7\u53d6\u6d88\u606f\uff0c\u6267\u884c\u3002<\/p>\n<p>\u4e09\u3001Message<br \/>\n1.Message msg = handler.obtainMessage();\u5c31\u662f\u751f\u6210\u4e00\u4e2amessage\uff0c\u5e76\u628ahandler\u4ed8\u7ed9message<\/p>\n<p>\u4e00\u4e2ahandler\u5bf9\u5e94\u4e00\u4e2alooper\uff0c\u4e00\u4e2alooper\u5bf9\u4e00\u4e2a\u4e00\u4e2amessageQueue\uff1b<br \/>\n\u5229\u7528handler\u751f\u6210message\uff0cmessage\u7684target\u5c5e\u6027\u5c31\u662fhandler \uff0c\u4e00\u4e2ahandler\u53ef\u4ee5\u751f\u6210\u591a\u4e2amessage<\/p>\n<p><a href=\"http:\/\/www.tuicool.com\/articles\/JFJvu2\">http:\/\/www.tuicool.com\/articles\/JFJvu2<\/a>\u00a0;<\/p>\n<p>\u56db\u3001handler.post\uff08r\uff09\u65b9\u6cd5\uff0c \u4f1a\u628ar\u653e\u5230msg\u91cc\u9762\uff0c\u7136\u540e\u901a\u8fc7\u6d88\u606f\u961f\u5217\uff0c\u76f4\u63a5\u8c03\u7528r.run()<br \/>\n\u533a\u522b\u5728\u4e8e\u4e0a\u9762\u7684\u4f1a\u5728\u6267\u884c\u7ebf\u7a0b\u5b9a\u4e49\u8fd0\u884c\u5185\u5bb9\uff0c\u8fd9\u4e2a\u4f1a\u5728\u9a71\u52a8\u7ebf\u7a0b\u5b9a\u4e49\u5185\u5bb9<\/p>\n<p>\u4e00\u4e2aactivity\u4e2d\u53ef\u4ee5\u6709\u591a\u4e2ahandler\uff0c\u4f46\u662f\u53ea\u80fd\u6709\u4e00\u4e2alooper\uff0clooper\u4e2d\u6709messageQueue\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Handler 1.\u5728\u8c03\u7528\u7ebf\u7a0b\uff0c\u4f7f\u7528 Message msg = handler.obtainM&hellip; <a href=\"http:\/\/www.anthonylee.cn\/myblog\/?p=35\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">Handler,Looper,MessageQueue<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/posts\/35"}],"collection":[{"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=35"}],"version-history":[{"count":1,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/posts\/35\/revisions"}],"predecessor-version":[{"id":36,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=\/wp\/v2\/posts\/35\/revisions\/36"}],"wp:attachment":[{"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=35"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=35"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.anthonylee.cn\/myblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=35"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}