{"id":1736,"date":"2013-04-28T20:20:47","date_gmt":"2013-04-28T12:20:47","guid":{"rendered":"http:\/\/leybreeze.com\/blog\/?p=1736"},"modified":"2013-04-28T20:20:47","modified_gmt":"2013-04-28T12:20:47","slug":"android-%e4%b8%ad-activity%ef%bc%8ctask%ef%bc%8cstack-%e4%bb%a5%e5%8f%8a-launch-mode-%e7%9a%84%e4%b8%80%e4%ba%9b%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"http:\/\/leybreeze.com\/blog\/?p=1736","title":{"rendered":"Android \u4e2d Activity\uff0cTask\uff0cStack \u4ee5\u53ca Launch Mode \u7684\u4e00\u4e9b\u8bf4\u660e"},"content":{"rendered":"<p>Acitivty \u662f Android \u5e94\u7528\u6846\u67b6\u4e2d\u6700\u4e3b\u8981\u7684\u7ec4\u4ef6\u4e4b\u4e00\u3002\u53ef\u4ee5 Task\/ Stack \u7684\u673a\u5236\u6765\u7ba1\u7406 Activity \u7684\u884c\u4e3a\u6a21\u5f0f\u3002\u5728 Android \u7684\u5b98\u65b9\u6587\u6863\u91cc\u5df2\u7ecf\u5bf9 <a title=\"Manifest \u6587\u4ef6\u4e2d\u53ef\u4ee5\u8bbe\u5b9a\u7684 Activity \u7684\u5143\u7d20\" href=\"http:\/\/developer.android.com\/guide\/topics\/manifest\/activity-element.html\" target=\"_blank\">Activity \u7684\u5c5e\u6027<\/a>\u4ee5\u53ca <a title=\"Tasks and Back Stack\" href=\"http:\/\/developer.android.com\/guide\/components\/tasks-and-back-stack.html\" target=\"_blank\">Task\/Stack<\/a> \u7684\u6982\u5ff5\u8fdb\u884c\u4e86\u8bf4\u660e\u3002\u5728\u300a<a title=\"\u5e94\u7528\u7a0b\u5e8f\u57fa\u7840\" href=\"http:\/\/leybreeze.com\/blog\/?p=86\">\u5e94\u7528\u7a0b\u5e8f\u57fa\u7840<\/a>\u300b\u4e00\u6587\u4e2d\u4e5f\u6709\u5bf9\u8fd9\u4e00\u4e3b\u9898\u7684\u76f8\u5173\u8bf4\u660e\u3002\u8fd9\u91cc\u4e13\u95e8\u5bf9\u6b64\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u8bf4\u660e\u3002<\/p>\n<p>Stack \u4fdd\u5b58\u4e86\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u6240\u6709\u6ca1\u6709\u88ab\u9500\u6bc1\uff08destroy\uff09\u7684 Activity\u3002\u4f8b\u5982\u4f9d\u6b21\u542f\u52a8\u4e86 A\u3001B\u3001C \u4e09\u4e2a Activity \u4e4b\u540e\uff0c\u8be5 stack \u7684\u72b6\u6001\u5373\u4e3a |A-B-C\u3002\u5f53 C \u6267\u884c\u4e86 finish() \u65b9\u6cd5\u6216\u662f\u7528\u6237\u70b9\u51fb\u4e86\u8fd4\u56de\u952e\u4e4b\u540e\uff0cstack \u7684\u72b6\u6001\u53d8\u4e3a\u4e86 |A-B\u3002<\/p>\n<p>\u800c task \u5219\u53ef\u4ee5\u7406\u89e3\u4e3a\u662f\u5728 stack \u4e2d\u5bf9 activity \u8fdb\u884c\u4e86\u4e00\u79cd\u5206\u7ec4\u3002\u4f8b\u5982\uff1a|1A-1B- 2A-2B-2C- 3A \u4e2d\u6839\u636e\u540e\u7f00\u53ef\u4ee5\u5206\u4e3a\u4e09\u4e2a\u4e0d\u540c\u7684 task\u3002\u8fd9\u65f6\u6240\u663e\u793a\u7684\u662f 3A\uff0c\u4e09\u4e2a task \u7684\u6839 Activty \u5206\u522b\u662f 1A\u30012A\u30013A\u3002\u901a\u5e38\uff0c\u4e00\u4e2a task \u4e2d\u7684 activity \u662f\u6210\u7ec4\u79fb\u52a8\u7684\u3002\u4f8b\u5982\u901a\u8fc7\u957f\u6309 HOME \u952e\u9009\u62e9\u4e86 2C \u4e4b\u540e\uff0cstack \u5c06\u53d8\u4e3a |1A-1B- 3A- 2A-2B-2C\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u7684 activity \u5c06\u4f1a\u5c5e\u4e8e\u540c\u4e00\u4e2a task\u3002\u4e0d\u8fc7\u5404\u4e2a activity \u4e4b\u95f4\u7684\u4ece\u5c5e\u5173\u7cfb\u4e5f\u80fd\u591f\u901a\u8fc7 taskAffinity\u00a0\u88ab\u91cd\u65b0\u5b9a\u4e49\u3002\u800c\u5982\u679c Intent \u5bf9\u8c61\u542b\u6709 FLAG_ACTIVITY_NEW_TASK \u65d7\u6807\uff0c\u5219\u5c06\u4f1a\u9009\u62e9\u4e00\u4e2a\u65b0\u7684 task\u3002<\/p>\n<p>\u4e0d\u540c\u7684\u542f\u52a8\u6a21\u5f0f\u4e5f\u4f1a\u5f71\u54cd task \u7684\u5206\u914d\uff1a<\/p>\n<p><a href=\"http:\/\/leybreeze.com\/blog\/?attachment_id=1737\" rel=\"attachment wp-att-1737\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1737\" title=\"launch mode\" alt=\"\" src=\"http:\/\/leybreeze.com\/blog\/wp-content\/uploads\/2013\/04\/launch-mode-640x142.png\" width=\"640\" height=\"142\" srcset=\"http:\/\/leybreeze.com\/blog\/wp-content\/uploads\/2013\/04\/launch-mode-640x142.png 640w, http:\/\/leybreeze.com\/blog\/wp-content\/uploads\/2013\/04\/launch-mode.png 927w\" sizes=\"(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px\" \/><\/a><\/p>\n<p>\u5982\u679c\u7528\u6237\u957f\u65f6\u95f4\u4e0d\u4f7f\u7528\u4e00\u4e2a task\uff0c\u8be5 task \u5c31\u4f1a\u88ab\u6e05\u9664\u4ee5\u91ca\u653e\u5185\u5b58\u3002\u4e0d\u8fc7\u6839 Activity \u5c06\u4f1a\u88ab\u4fdd\u7559\u3002\u4f8b\u5982\uff1a|1A-1B- 2A-2B-2C- 3A \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c06\u53d8\u4e3a |1A- 2A- 3A\u3002\u5982\u679c\u5c06\u6839 Activity \u7684\u00a0alwaysRetainTaskState \u5c5e\u6027\u8bbe\u4e3a true\uff0c\u5219\u8be5 task \u4e2d\u7684\u6240\u6709\u6d3b\u52a8\u90fd\u5c06\u88ab\u59cb\u7ec8\u4fdd\u7559\u3002\u5982\u679c\u5c06\u6839 Activity \u7684\u00a0clearTaskOnLaunch \u5c5e\u6027\u8bbe\u4e3a true\uff0c\u5219\u5728\u7528\u6237\u79bb\u5f00\u8be5 task \u65f6\u5305\u62ec\u6839 Activity \u5728\u5185\u7684\u8fd9\u4e00 task \u5c06\u88ab\u5b8c\u6574\u6e05\u9664\u3002\u5982\u679c\u5c06 task \u4e2d\u7684\u67d0\u4e2a Activity \u7684\u00a0finishOnTaskLaunch \u5c5e\u6027\u8bbe\u4e3a true\uff0c\u5219\u5728\u79bb\u5f00\u8be5 task \u5e76\u8fd4\u56de\u4e4b\u540e\uff0c\u8fd9\u4e00 Activity \u5c06\u88ab\u6e05\u9664\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Acitivty \u662f Android \u5e94\u7528\u6846\u67b6\u4e2d\u6700\u4e3b\u8981\u7684\u7ec4\u4ef6\u4e4b\u4e00\u3002\u53ef\u4ee5 Task\/ Stack \u7684\u673a\u5236\u6765\u7ba1\u7406  &hellip; <a href=\"http:\/\/leybreeze.com\/blog\/?p=1736\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cAndroid \u4e2d Activity\uff0cTask\uff0cStack \u4ee5\u53ca Launch Mode \u7684\u4e00\u4e9b\u8bf4\u660e\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[101,19],"_links":{"self":[{"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1736"}],"collection":[{"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1736"}],"version-history":[{"count":3,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1736\/revisions"}],"predecessor-version":[{"id":1744,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1736\/revisions\/1744"}],"wp:attachment":[{"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1736"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/leybreeze.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}