{"id":1152,"date":"2017-12-09T01:22:37","date_gmt":"2017-12-08T17:22:37","guid":{"rendered":"http:\/\/blog.xiunian.wang\/?p=1152"},"modified":"2023-07-04T08:33:38","modified_gmt":"2023-07-04T00:33:38","slug":"%e8%80%81%e7%94%9f%e5%b8%b8%e8%b0%88%e4%b9%8bandroid-%e5%90%af%e5%8a%a8%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/blog.xiunian.wang\/?p=1152","title":{"rendered":"\u8001\u751f\u5e38\u8c08\u4e4bAndroid \u542f\u52a8\u6a21\u5f0f"},"content":{"rendered":"\n

<\/p>\n\n\n\n

\u5173\u4e8e\u542f\u52a8\u6a21\u5f0f\u7f51\u4e0a\u4e00\u5806\u4e00\u5806\u7684\u6587\u7ae0\u53ef\u4ee5\u53c2\u8003\uff0c\u6211\u53ea\u662f\u901a\u8fc7\u81ea\u5df1\u5b9e\u8df5\u8bb0\u5f55\u4e00\u4e0b\u5b9e\u9a8c\u8fc7\u7a0b<\/p>\n\n\n\n

Tip1. adb shell<\/p>\n\n\n\n

dumpsys | grep \"DUMP OF SERVICE\"  \/\/\u5217\u4e3e\u5f53\u524d\u624b\u673a\u6240\u6709\u652f\u6301\u7684dumpsys\u547d\u4ee4\n\u67e5\u770bactivity \u5806\u6808\ndumpsys activity \u5305\u540d<\/pre>\n\n\n\n
\u627e\u5230 Running activities (most recent first): \u8fd9\u4e00\u884c\u4e0b\u9762\u7684\u5c31\u662ftask\u4fe1\u606f<\/p>\n\n\n\n
Task<\/h4>\n\n\n\n
    \n
  1. Task \u662f\u4e00\u4e2a\u5806\u6808\u3002\u91cc\u9762\u7ef4\u62a4\u4e86\u4e00\u7cfb\u5217Activity<\/li>\n\n\n\n
  2. \u4e0d\u540c\u5e94\u7528\u7684Activity \u53ef\u4ee5\u5305\u542b\u5728\u4e00\u4e2aTask \u91cc\u8fb9\uff0c\u6bd4\u5982\u7cfb\u7edf\u53d1\u9001\u90ae\u4ef6\u7b49\u7b49
    <\/li>\n<\/ol>\n\n\n\n\n\n\n\n
    \u5b9e\u9a8c1 \u5728\u4e00\u4e2aapp\u4e2d\u5efa\u7acb\u4e24\u4e2aTask<\/h4>\n\n\n\n
      \n
    1. \u76ee\u524d\u6709\u56db\u4e2aActivity \uff0c\u8ba9Main4 \u5728\u4e00\u4e2a\u65b0\u7684Task\u4e2d\uff0c\u8bbe\u7f6e Main4 taskAffinity \u4e3a ‘.task2’<\/b>,\u542f\u52a8\u6a21\u5f0f\u8bbe\u7f6e\u4e3a singleTask\uff0c\u8fd9\u6837\u6211\u4eec\u4ecetask3 \u542f\u52a8task4 \u65f6\u81ea\u52a8\u4f1a\u628aMain4 \u653e\u5165\u65b0\u7684task(.task2)\u4e2d\u53bb\u4e86<\/li>\n<\/ol>\n\n\n
      \n
      \"\"
      \u56fe1<\/figcaption><\/figure><\/div>\n\n\n
       2. \u82e5Main2Activity \u4e0d\u8bbe\u7f6eTaskAfinity, \u542f\u52a8\u6a21\u5f0f\u4e3asingleTask\uff0c Main4Activity\u542f\u52a8Main2Activity \u4f1a\u590d\u7528Main2\u5e76\u628a main2 \u4e0a\u9762\u7684 Main3 \u5e72\u6389\u3002\u53d8\u6210\u5982\u4e0b<\/p>\n\n\n
      \n
      \"\"
      \u56fe2<\/figcaption><\/figure><\/div>\n\n\n
      \u5047\u5982\u4e0a\u4e0d\u7ba1\u8bbe\u7f6e\u4e0d\u8bbe\u7f6etaskaffinity ,Main2Activity \u542f\u52a8\u6a21\u5f0f\u4e3astandard\uff0c\u76f4\u63a5\u4f1a\u5230\u5f53\u524dtask2\u4e2d\u6dfb\u52a0Main2 \uff0c\u53d8\u6210\u5982\u4e0b<\/p>\n\n\n
      \n
      \"\"<\/figure><\/div>\n\n\n
      \u5728\u6b64\u60c5\u51b5\u4e0b\u82e5\u9700\u5c06main2 \u6dfb\u52a0\u5230\u9ed8\u8ba4\u7684task\uff0c\u5219\u9700\u8bbe\u7f6eflag=FLAG_ACTIVITY_NEW_TASK<\/em> \u6b64\u65f6\u5982\u4e0b\u663e\u793a<\/p>\n\n\n
      \n
      \"\"<\/figure><\/div>\n\n\n
      \u6211\u6307\u5b9aMain4\u7684 Affinity\u4e3a.task2\uff0c\u6211\u4eec\u957f\u6309home \u7684\u65f6\u5019\u4f1a\u51fa\u73b0\u4e24\u4e2a\u7a97\u53e3\u5206\u522b\u5bf9\u5e94\u4e0d\u540c\u7684\u4efb\u52a1\uff0c\u6211\u628atask2 \u6539\u6210\u5e94\u7528\u7a0b\u5e8f\u7684\u5305\u540d\uff0c\u5c06\u53ea\u4f1a\u51fa\u73b0\u4e00\u4e2a\u7a97\u53e3\u3002\u4f46\u662f\uff0c\u6211\u4eec\u518d\u53bb\u770btask\u4e2a\u6570\u5c45\u7136\u662f1\uff0c\u4e5f\u5c31\u662f\u6839\u672c\u6ca1\u6709\u521b\u5efa\u65b0\u7684task \uff0c\u56e0\u6b64\u9ed8\u8ba4affinity \u4e3a\u5305\u540d\uff0c\u53ea\u6709\u6539\u53d8\u4e86affinity \u624d\u4f1a\u521b\u5efa\u51fa\u4e00\u4e2a\u65b0\u7684task\uff0c \u7ed3\u8bba \u8981\u60f3\u521b\u5efatask \u4e00\u5b9a\u8981\u8bbe\u7f6e taskAffinity\u5c5e\u6027\u5e76\u4e14\u548c\u53d1\u8d77\u8005\u7684task\u540d\u79f0\u4e0d\u4e00\u81f4\u624d\u884c,\u4ee3\u7801\u4e2d\u8bbe\u7f6eFLAG_ACTIVITY_NEW_TASK<\/em>\u6216\u8005\u6216\u8005\u542f\u52a8\u6a21\u5f0fsingleTask\uff0c<\/p>\n\n\n\n
      \u8865\u5145\u5b9e\u9a8c\uff1a task1\u7684ActivityA start task2\u7684activityB \u5982\u679ctask2\u4e2d\u7684activityB \u4e4b\u4e0a\u6709ActivityC \uff0csingleTask \u6a21\u5f0f\u4f1a\u628aC \u5e72\u6389\uff08destroy\uff09\uff0c\u7136\u540eactivityB\u8c03\u7528newIntent \u3002<\/p>\n\n\n\n
      \u5176\u4ed6\u7684flag \u8bd5\u8bd5\u770b<\/h4>\n\n\n\n
        \n
      1. Intent.FLAG_ACTIVITY_CLEAR_TOP
        \u8df3\u8f6c\u5230\u7684\u76ee\u6807Activity \u4e4b\u540e\u7684activity \u5168\u90e8finish\u6389\u3002\u4f46\u662f\u53ea\u662f\u5176\u6240\u5728task\u7684\u3002
        \"\"<\/figure><\/li>\n\n\n\n
      2. \u4e0a\u9762\u63cf\u8ff0\u6709\u4e0d\u8db3\uff0c\u5982\u679c\u4e0d\u60f3\u91cd\u65b0\u521b\u5efamain2 \u53ef\u8bbe\u7f6emain2\u542f\u52a8\u6a21\u5f0f\u4e3asingleTask, \u4f1a\u81ea\u52a8\u6e05\u9664main2\u4e4b\u4e0a\u7684act\uff0c\u5e76\u590d\u7528main2,\u5e76\u4e0d\u4e00\u5b9a\u975e\u5f97\u8bbe\u7f6esingleTop<\/li>\n\n\n\n
      3. \u5982\u679cMain4\u53ea\u6dfb\u52a0\u4e86FLAG_ACTIVITY_NEW_TASK<\/em> \uff0c\u5b83\u548c\u8bbe\u7f6emain2\u4e3asingeTask\u4e0d\u4e00\u6837\uff0c\u4e0d\u4f1a\u4eb2\u7a7a\u9ed8\u8ba4\u6808\u4e2d\u540e\u9762\u7684act\u3002\u5982\u4e0a\u56fe2\u6240\u793a<\/li>\n\n\n\n
      4. Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
        \u8bbe\u7f6e\u540e\u5728\u4efb\u52a1\u5217\u8868\u4e2d\u4e0d\u663e\u793a\u8fd9\u4e2a\u7a97\u53e3\uff0c\u8fd9\u548c\u8bbe\u7f6e\u76f8\u540c\u7684taskAffinity \u4e0d\u663e\u793a\u539f\u7406\u4e0d\u4e00\u6837\u3002<\/li>\n\n\n\n
      5. FLAG_ACTIVITY_NO_ANIMATION
        \u4e0d\u7528\u7cfb\u7edf\u754c\u9762\u8df3\u8f6c\u52a8\u753b<\/li>\n\n\n\n
      6. FLAG_ACTIVITY_REORDER_TO_FRONT
        a b c d \u4eced start b \u5e76\u4e14\u5e26\u8fd9\u4e2a\u53c2\u6570\uff0cb \u4e0d\u91cd\u65b0\u521b\u5efa task\u6808\u53d8\u4e3a a c d b \u3002\u4f46\u662f\u4ece\u5176\u4ed6task\u4e2d\u542f\u52a8 b\u5219\u65e0\u6548<\/li>\n<\/ol>\n\n\n\n
        \u5b9e\u9a8c2 singleInstance<\/h4>\n\n\n\n
        \u4f1a\u53e6\u5916\u542f\u4e00\u4e2atask\uff0c\u540d\u5b57\u548c \u6700\u539f\u59cbtask\u7684\u540d\u5b57\u4e00\u81f4(\u6b64\u65f6\u518d\u4efb\u52a1\u5217\u8868\u4e2d\u53ea\u4f1a\u51fa\u73b0\u4e00\u4e2a\u7a97\u53e3\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86taskAffinity \u5c5e\u6027\uff0c\u5c31\u4f1a\u548ctask\u4e00\u6837\u51fa\u73b0\u4e24\u4e2a\u7a97\u53e3) \uff0c\u518d\u6309home \u70b9\u51fbapp\u56fe\u6807\u4f1a\u56de\u5230\u542f\u52a8app\u6839\uff08\u7b2c\u4e00\u4e2a\uff09task\u7684\u6700\u540e\u4e00\u4e2aactivity Main3\u3002 Main4 \u8fd9\u4e2aactivity \u4e00\u76f4\u5728\u81ea\u5df1\u7684Task\u4e2d\uff0c\u8fd9\u4e2atask\u53ea\u4fdd\u7559\u8fd9\u4e00\u4e2aactivity \u518d\u6b21start \u8fd9\u4e2aActivity\u7684\u65f6\u5019\u4e0d\u518d\u8c03\u7528onCreate \u800c\u662f onNewIntent \u65b9\u6cd5\u3002<\/p>\n\n\n\n
        singleTop<\/h4>\n\n\n\n
        \u8c03\u7528\u8005\u8c03\u7528\u4e4b\u540e\uff0c\u5982\u679c\u8be5 activity \u5728\u6240\u5728\u6808\u7684\u6808\u9876\uff0c\u5219\u4e0d\u521b\u5efa \uff0c\u5982\u679c\u4e0d\u518d\u6808\u9876\uff0c\u5219\u5728\u7684task\u6808\u9876\u4e2d\u65b0\u589e\u4e00\u4e2aactivity\u3002\u8be5\u503c\u548cFLAG_ACTIVITY_CLEAR_TOP<\/em> \u6709\u76f8\u540c\u4f5c\u7528\uff0c\u5982\u679ctask2\u4e2d\u542f\u52a8singleTop\u7684act\uff0c\u5219\u4f1a\u5c06\u6539act\u6dfb\u52a0\u5230task2\u4e2d,\u82e5task2\u7684act \u8981\u8ba9singleTop\u7684\u5728\u539f\u6765\u7684\u6808\u4e2d\u5904\u7406\uff0c\u5219\u8bbe\u7f6eflag\u4e3aFLAG_ACTIVITY_NEW_TASK<\/em><\/p>\n\n\n\n
        <\/p>\n","protected":false},"excerpt":{"rendered":"
        \u5173\u4e8e\u542f\u52a8\u6a21\u5f0f\u7f51\u4e0a\u4e00\u5806\u4e00\u5806\u7684\u6587\u7ae0\u53ef\u4ee5\u53c2\u8003\uff0c\u6211\u53ea\u662f\u901a\u8fc7\u81ea\u5df1\u5b9e\u8df5\u8bb0\u5f55\u4e00\u4e0b\u5b9e\u9a8c\u8fc7\u7a0b Tip1. adb shell dumpsys | grep “DUMP OF SERVICE” \/\/\u5217\u4e3e\u5f53\u524d\u624b\u673a\u6240\u6709\u652f\u6301\u7684dumpsys\u547d\u4ee4 \u67e5\u770bactivity \u5806\u6808 dumpsys activity \u5305\u540d \u627e\u5230 Running activities (most recent first): \u8fd9\u4e00\u884c\u4e0b\u9762\u7684\u5c31\u662ftask\u4fe1\u606f Task<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,8],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1152"}],"collection":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1152"}],"version-history":[{"count":28,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1152\/revisions"}],"predecessor-version":[{"id":1778,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=\/wp\/v2\/posts\/1152\/revisions\/1778"}],"wp:attachment":[{"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.xiunian.wang\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}