{"id":33727,"date":"2024-11-25T10:33:10","date_gmt":"2024-11-25T02:33:10","guid":{"rendered":"https:\/\/fwq.ai\/blog\/33727\/"},"modified":"2024-11-25T10:33:10","modified_gmt":"2024-11-25T02:33:10","slug":"%e4%b8%80%e8%b5%b7%e7%9c%8b%e7%9c%8b-activity%e5%90%af%e5%8a%a8%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/33727\/","title":{"rendered":"\u4e00\u8d77\u770b\u770b Activity\u542f\u52a8\u6a21\u5f0f"},"content":{"rendered":"

\u4e3b\u8981\u4ecb\u7ecd\u4e86Activity\u542f\u52a8\u6a21\u5f0f\u7684\u76f8\u5173\u8d44\u6599<\/h2>\n

\"\u4e00\u8d77\u770b\u770b<\/p>\n

\u63a8\u8350\uff08\u514d\u8d39\uff09\uff1a<\/strong><\/p>\n

\u524d\u8a00
<\/h2>\n

\u5e73\u5e38\u6211\u4eec\u542f\u52a8\u6d3b\u52a8\u7684\u65f6\u5019\u5c31\u662f\u76f4\u63a5startActivity\u6216\u8bb8\u5e76\u6ca1\u6709\u6ce8\u610f\u6d3b\u52a8\u7684\u542f\u52a8\u6a21\u5f0f\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u90fd\u662f\u4ee5\u9ed8\u8ba4\u7684\u542f\u52a8\u6a21\u5f0f\u542f\u52a8\u3002\u4f46\u542f\u52a8\u6a21\u5f0f\u6709\u65f6\u5019\u662f\u6bd4\u8f83\u91cd\u8981\u7684\u3002\u4f8b\u5982\u4e00\u4e2a\u6d3b\u52a8\u4f60\u60f3\u4ed6\u53ea\u542f\u52a8\u4e00\u6b21\u4e0d\u8981\u6709\u591a\u4e2a\u5b9e\u4f8b\uff0c\u90a3\u4e48\u4f60\u53ef\u80fd\u9700\u8981\u628a\u4ed6\u8bbe\u7f6e\u4e3asingleTask\u6a21\u5f0f\u3002\u6240\u4ee5\u6709\u5fc5\u8981\u4e86\u89e3\u4e00\u4e0b\u8fd9\u4e00\u4e9b\u542f\u52a8\u6a21\u5f0f\u3002\u540c\u65f6\u8981\u6ce8\u610f\u4e00\u4e0b\uff0c\u542f\u52a8\u6a21\u5f0f\u2260\u542f\u52a8\u65b9\u5f0f\uff0c\u542f\u52a8\u65b9\u5f0f\u662f\u6307\u663e\u793a\u542f\u52a8\u548c\u9690\u5f0f\u542f\u52a8\uff0c\u4e0d\u8981\u6df7\u6dc6\uff0c\u663e\u793a\u542f\u52a8\u548c\u9690\u5f0f\u542f\u52a8\u540e\u7eed\u6211\u4f1a\u6709\u4e13\u95e8\u7684\u6587\u7ae0\u8bb2\u89e3\u3002<\/p>\n

\u5173\u4e8e\u4efb\u52a1\u6808\u7b80\u4ecb
<\/h2>\n

\u8981\u4e86\u89e3\u542f\u52a8\u6a21\u5f0f\uff0c\u9996\u5148\u8981\u4e86\u89e3\u4e00\u4e0b\u5173\u4e8e\u4efb\u52a1\u6808\u7684\u6982\u5ff5\u3002\u5173\u4e8e\u4efb\u52a1\u6808\u7684\u5b9e\u73b0\u539f\u7406\u7b49\u6211\u5728\u8fd9\u91cc\u5c31\u5148\u4e0d\u8bf4\u4e86\uff0c\u8fd9\u91cc\u4e3b\u8981\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u4ec0\u4e48\u662f\u4efb\u52a1\u6808\u3002\u6211\u4eec\u542f\u52a8\u7684\u6d3b\u52a8\u5b9e\u4f8b\u90fd\u4f1a\u653e\u5728\u4e00\u4e2a\u53eb\u505a\u4efb\u52a1\u6808\u7684\u4e1c\u897f\u91cc\u9762\u3002\u6211\u4eec\u90fd\u77e5\u9053\u6808\u662f\u201c\u540e\u8fdb\u5148\u51fa\u201d\u7684\u7279\u70b9\u3002\u6253\u4e2a\u6bd4\u65b9\uff0c\u4efb\u52a1\u6808\u5c31\u662f\u4e00\u4e2a\u7fbd\u6bdb\u7403\u7b52\uff0c\u6d3b\u52a8\u5b9e\u4f8b\u5c31\u662f\u4e00\u4e2a\u4e2a\u7fbd\u6bdb\u7403\uff0c\u540e\u653e\u8fdb\u53bb\u7684\u53ea\u80fd\u5148\u62ff\u51fa\u6765\u3002\u6240\u4ee5\u5f53\u6211\u4eec\u542f\u52a8\u4e00\u4e2aapp\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u4efb\u52a1\u6808\uff0c\u7136\u540e\u6211\u4eec\u5c31\u5f80\u91cc\u9762\u4e22\u6d3b\u52a8\u5b9e\u4f8b\u3002\u5f53\u6211\u4eec\u6309\u8fd4\u56de\u9500\u6bc1\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u8fd9\u4e9b\u6d3b\u52a8\u5c31\u4f9d\u6b21\u4ece\u4efb\u52a1\u6808\u91cc\u9762\u51fa\u6765\u3002\u5f53\u7136\uff0c\u4e00\u4e2aapp\u53ef\u4ee5\u62e5\u6709\u591a\u4e2a\u4efb\u52a1\u6808\uff0c\u4f8b\u5982\u4f7f\u7528singleInstence\u542f\u52a8\u7684\u6d3b\u52a8\u5c31\u662f\u5728\u4e00\u4e2a\u72ec\u7acb\u7684\u4efb\u52a1\u6808\u4e2d\u3002\u4e86\u89e3\u5b8c\u4efb\u52a1\u6808\u7684\u6982\u5ff5\uff0c\u63a5\u4e0b\u6765\u5c31\u53ef\u4ee5\u6765\u770b\u770b\u6d3b\u52a8\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f\u3002<\/p>\n

\u89e3\u6790Activity\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f
<\/h2>\n

standard
<\/h3>\n

\u8fd9\u79cd\u662f\u6807\u51c6\u542f\u52a8\u6a21\u5f0f\uff0c\u9ed8\u8ba4\u5c31\u662f\u8fd9\u79cd\u542f\u52a8\u6a21\u5f0f\u3002\u6bcf\u6b21\u542f\u52a8\u8fd9\u79cd\u542f\u52a8\u6a21\u5f0f\u7684\u6d3b\u52a8\u7684\u65f6\u5019\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u5165\u6808\u4e2d\uff0c\u4e0d\u7ba1\u6808\u4e2d\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\u3002\u8fd9\u4e5f\u662f\u6700\u5bb9\u6613\u7406\u89e3\u7684\u3002<\/p>\n

singleTop
<\/h3>\n

\u987e\u540d\u601d\u4e49\uff0c\u6808\u9876\u662f\u5355\u4e00\u5b9e\u4f8b\u7684\u3002\u4ec0\u4e48\u610f\u601d\u5462\u3002\u5047\u8bbe\u4f60\u73b0\u5728\u542f\u52a8\u4e00\u4e2aActivityA\uff0c\u4f46\u662f\u8fd9\u4e2a\u65f6\u5019\u5df2\u7ecf\u5b58\u5728\u4e00\u4e2aActivityA\u5b9e\u4f8b\u5728\u6808\u9876\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\uff0c\u5c31\u4e0d\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u3002\u4f46\u662f\u5982\u679c\uff0c\u5728\u975e\u6808\u9876\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u8fd8\u662f\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u7684\u3002\u4f8b\u5982\uff0c\u73b0\u5728\u6808\u4e2d\u7684\u6d3b\u52a8\u662f ABC\uff0cA\u5904\u4e8e\u6808\u9876\u3002\u7136\u540e\u6b64\u65f6\u542f\u52a8A\uff0c\u662f\u4e0d\u4f1a\u518d\u521b\u5efa\u4e00\u4e2aA\u6d3b\u52a8\u51fa\u6765\uff0c\u800c\u662f\u6267\u884cA\u7684onNewIntent\u65b9\u6cd5\uff1b\u4f46\u662f\u5982\u679c\u6b64\u65f6\u542f\u52a8C\u6d3b\u52a8\uff0c\u7531\u4e8e\u6808\u9876\u662fA\u4e0d\u662fC\uff0c\u90a3\u4e48\u8fd8\u662f\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684C\u5b9e\u4f8b\u51fa\u6765\uff0c\u6b64\u65f6\u7684\u6808\u60c5\u51b5\u5c31\u662fCABC\u3002<\/p>\n

singleTask
<\/h3>\n

\u5355\u4e00\u4efb\u52a1\u6a21\u5f0f\u3002\u8fd9\u4e2a\u6a21\u5f0f\u7684\u610f\u601d\u662f\uff0c\u5728\u8be5\u6d3b\u52a8\u7684\u542f\u52a8\u6808\u4e2d\uff0c\u53ea\u80fd\u5b58\u5728\u5355\u4e00\u5b9e\u4f8b\uff0c\u4e0d\u7ba1\u662f\u5426\u4f4d\u4e8e\u6808\u9876\u3002\u4e0e\u5176\u4ed6\u542f\u52a8\u6a21\u5f0f\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u4e2a\u542f\u52a8\u6a21\u5f0f\u53ef\u4ee5\u6307\u5b9a\u6808\u53bb\u542f\u52a8\u3002\u4f8b\u5982\u73b0\u5728\u6709\u4e00\u4e2a\u6808Main\uff0c\u4f46\u662f\u4f60\u53ef\u4ee5\u7ed9\u6d3b\u52a8A\u6307\u5b9a\u4e00\u4e2a\u6808\u540ddev\uff0c\u90a3\u4e48\u542f\u52a8A\u7684\u65f6\u5019\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6808\u53eb\u505adev\u3002\u6240\u4ee5singleTask\u7684\u610f\u601d\u5c31\u662f\uff0c\u5f53\u4f60\u542f\u52a8\u4e00\u4e2a\u542f\u52a8\u6a21\u5f0f\u4e3asingleTask\u7684\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u5982\u679c\u6808\u4e2d\u6ca1\u6709\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u90a3\u4e48\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u5165\u6808\u4e2d\uff1b\u5982\u679c\u6307\u5b9a\u6808\u4e2d\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u4f8b\u5982\u6808\u4e2d\u6709ABC\uff0c\u7136\u540e\u4f60\u542f\u52a8B\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\u4e0d\u4f1a\u53bb\u521b\u5efa\u65b0\u7684B\u5b9e\u4f8b\uff0c\u800c\u662f\u628aB\u653e\u5230\u6808\u9876\uff0c\u5e76\u628aA\u9876\u51fa\u53bb\uff0c\u518d\u6267\u884cB\u7684onNewIntent\u65b9\u6cd5\uff0c\u6b64\u65f6\u6808\u7684\u60c5\u51b5\u5c31\u662fBC\u3002
\u7ec6\u5fc3\u7684\u8bfb\u8005\u4f1a\u53d1\u73b0\u201c\u9876\u51fa\u53bb\u201d\u3002\u662f\u7684\uff0c\u6211\u4eec\u90fd\u77e5\u9053\u6808\u662f\u540e\u8fdb\u5148\u51fa\u7684\u7279\u70b9\uff0c\u4f8b\u5982\u4f60\u5f80\u7b52\u91cc\u653e\u4e863\u4e2a\u7fbd\u6bdb\u7403\uff0c\u90a3\u4f60\u60f3\u8981\u62ff\u5230\u4e2d\u95f4\u90a3\u4e2a\u7fbd\u6bdb\u7403\uff0c\u662f\u4e0d\u662f\u53ea\u80fd\u5148\u628a\u4e0a\u9762\u90a3\u4e2a\u62bd\u51fa\u6765\u5462\uff0c\u540c\u6837\u7684\u9053\u7406\uff0c\u8981\u60f3\u628aB\u63d0\u5230\u6808\u9876\uff0c\u90a3\u4e48\u5fc5\u987b\u628aA\u9876\u51fa\u6765\u3002\u53ef\u80fd\u4f1a\u6709\u5f88\u591a\u8bfb\u8005\u8bef\u4ee5\u4e3a\u542f\u52a8\u540e\u662fBAC\uff0c\u4f46\u5176\u5b9e\u662fBC\uff0c\u56e0\u4e3aA\u5f97\u5148\u51fa\u6808\uff0cB\u624d\u80fd\u51fa\u6765\u3002\u540c\u7406\uff0c\u5982\u679c\u6808\u4e2d\u662fADFBC\uff0c\u8fd9\u4e2a\u542f\u52a8B\uff0c\u4e5f\u662fBC\uff0c\u4e0a\u9762\u7684\u5168\u90e8\u88ab\u51fa\u6808\u4e86\u3002<\/p>\n

singleInstance
<\/h3>\n

\u5355\u4f8b\u6a21\u5f0f\u3002\u8fd9\u4e2a\u662fsingleTask\u7684\u5f3a\u5316\u7248\u672c\u3002\u4ed6\u4f1a\u81ea\u5df1\u65b0\u5efa\u4e00\u4e2a\u6808\u5e76\u628a\u8fd9\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u8fdb\u53bb\uff0c\u800c\u4e14\u8fd9\u4e2a\u6808\u53ea\u80fd\u653e\u8fd9\u4e2a\u6d3b\u52a8\u5b9e\u4f8b\u3002\u6240\u4ee5\u5f53\u91cd\u590d\u542f\u52a8\u8fd9\u4e2a\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u53ea\u8981\u4ed6\u5b58\u5728\uff0c\u90fd\u662f\u8c03\u7528\u8fd9\u4e2a\u6d3b\u52a8onNewIntent\u65b9\u6cd5\u5e76\u5207\u6362\u5230\u8fd9\u4e2a\u6808\u4e2d\uff0c\u5e76\u4e0d\u4f1a\u53bb\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u3002<\/p>\n

\u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u7684\u4e24\u79cd\u65b9\u6cd5
<\/h2>\n

\u4e86\u89e3\u4e86\u6d3b\u52a8\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f\uff0c\u63a5\u4e0b\u6765\u770b\u770b\u5982\u4f55\u7ed9\u4ed6\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\u3002<\/p>\n

\u9759\u6001\u8bbe\u7f6e
<\/h3>\n

\u9759\u6001\u8bbe\u7f6e\u5c31\u662f\u5728AndroidManifest\u4e2d\u7ed9\u5177\u4f53\u6d3b\u52a8\u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u3002\u901a\u8fc7\u7ed9\u6d3b\u52a8\u6307\u5b9alaunchMode\u53c2\u6570\u6765\u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n

 <activity><\/activity><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u52a8\u6001\u8bbe\u7f6e
 <\/h3>\n
\u52a8\u6001\u8bbe\u7f6e\u662f\u5728\u542f\u52a8\u6d3b\u52a8\u7684\u65f6\u5019\u518d\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u4f8b\u5982\uff1a<\/p>\n
Intent intent = new Intent();\nintent.setClass(this,SecondActivity.class);\nintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);\nstartActivity(intent);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u901a\u8fc7intent.addFlags\u8fd9\u4e2a\u65b9\u6cd5\u6765\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\u6765\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u5176\u4ed6\u7684\u53c2\u6570\u6709\uff1a<\/p>\n
    \n
  • FLAG_ACTIVITY_NEW_TASK\uff1asingleTask\u6a21\u5f0f<\/li>\n
  • FLAG_ACTIVITY_SINGLE_TOP\uff1asingleTop\u6a21\u5f0f<\/li>\n
  • FLAG_ACTIVITY_CLEAR_TOP:\u6e05\u9664\u8be5\u6d3b\u52a8\u4e0a\u65b9\u7684\u6240\u6709\u6d3b\u52a8\u3002\u4e00\u822c\u548csingleTask\u4e00\u8d77\u4f7f\u7528\u3002\u4f46\u662f\u5982\u679c\u4f60\u7684\u542f\u52a8\u6a21\u5f0f\u662fstandard\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6d3b\u52a8\u8fde\u4ed6\u4e4b\u4e0a\u7684\u6240\u6709\u6d3b\u52a8\u90fd\u4f1a\u88ab\u51fa\u6808\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u8fdb\u53bb\u3002\u4f8b\u5982\u73b0\u5728\u6808\u4e2d\u662fABCD\uff0c\u4ee5FLAG_ACTIVITY_CLEAR_TOP+standard\u6a21\u5f0f\u542f\u52a8C\u7684\u65f6\u5019\uff0c\u9996\u5148\u6e05\u7406\u6389ABC\uff0c\u662f\u7684\uff0cC\u4e5f\u4f1a\u88ab\u6e05\u7406\uff0c\u7136\u540e\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684C\u653e\u8fdb\u53bb\uff0c\u6267\u884c\u4e4b\u540e\u5c31\u662fCD\u3002 <\/li>\n<\/ul>\n
    \u7279\u522b\u6ce8\u610f\u7684\u5751
     <\/h2>\n
    singleInstance\u8fd4\u56de\u4efb\u52a1\u6808
     <\/h3>\n
    \u73b0\u5728\u6a21\u62df\u4e00\u4e2a\u573a\u666f\uff1a\u73b0\u5728\u6709\u4e09\u4e2a\u6d3b\u52a8 A,B,C\u3002A\u548cC\u7684\u542f\u52a8\u6a21\u5f0f\u90fd\u662fstandard\uff0cB\u7684\u542f\u52a8\u6a21\u5f0f\u662fsingleInstance\u3002\u5148\u542f\u52a8A\uff0c\u518d\u542f\u52a8B\uff0c\u7136\u540e\u518d\u542f\u52a8C\u3002\u8fd9\u4e2a\u65f6\u5019\u95ee\u9898\u6765\u4e86\uff0c\u5982\u679c\u6211\u8fd9\u4e2a\u65f6\u5019\u6309\u4e0b\u8fd4\u56de\u952e\uff0c\u662f\u56de\u5230B\u5417\uff1f\u7b54\u6848\u662f\u56de\u5230A\u3002\u518d\u6309\u4e00\u4e0b\u5462\uff0c\u8fd4\u56de\u684c\u9762\u5417\uff1f\u7b54\u6848\u662f\u56de\u5230B\uff0c\u518d\u6309\u4e00\u4e0b\u518d\u56de\u5230\u684c\u9762\u3002\u5176\u5b9e\u4e0d\u96be\u7406\u89e3\u3002\u6211\u4eec\u90fd\u77e5\u9053singleInstance\u4f1a\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684\u6808\uff0c\u5f53\u6211\u4eec\u542f\u52a8A\u7684\u65f6\u5019\uff0cA\u4f4d\u4e8e\u6808First\u4e2d\uff0c\u542f\u52a8B\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6808Second\u5e76\u628aB\u5b9e\u4f8b\u653e\u8fdb\u53bb\u3002\u8fd9\u4e2a\u65f6\u5019\u518d\u542f\u52a8C\uff0c\u5c31\u4f1a\u5207\u6362\u5230\u6808FIrst\uff0c\u56e0\u4e3asingleInstance\u521b\u5efa\u7684\u6808\u53ea\u80fd\u653e\u4e00\u4e2a\uff0c\u6240\u4ee5C\u4f1a\u653e\u5230\u6808First\u4e2d\uff0c\u5f53\u6309\u4e0b\u8fd4\u56de\u7684\u65f6\u5019\uff0c\u6808First\u4e2d\u7684\u6d3b\u52a8\u5c31\u4f1a\u4f9d\u6b21\u51fa\u6808\uff0c\u76f4\u5230\u5168\u90e8\u51fa\u5b8c\uff0c\u624d\u4f1a\u5207\u6362\u5230\u6808Second\u4e2d\u3002\u6240\u4ee5\u8981\u6ce8\u610f\u8fd9\u4e2a\u70b9\u3002<\/p>\n
    singleTask\u591a\u4efb\u52a1\u6808\u542f\u52a8\u95ee\u9898
     <\/h3>\n
    \u8fd9\u4e2a\u95ee\u9898\u548c\u4e0a\u9762singleTop\u7684\u672c\u8d28\u662f\u4e00\u6837\u7684\u3002\u6a21\u62df\u4e00\u4e2a\u573a\u666f\uff1a\u73b0\u5728\u6709\u4e24\u4e2a\u6808\uff1aFirst\uff1aABC\uff1bSecond\uff1aQWE\u3002\u6808First\u4f4d\u4e8e\u524d\u53f0\uff0c\u6808Second\u4f4d\u4e8e\u540e\u53f0\u3002A\u4f4d\u4e8e\u6808\u9876\u3002\u8fd9\u4e2a\u65f6\u5019\u4ee5singleTask\u7684\u6a21\u5f0f\u542f\u52a8W\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\u6837\u7684\u60c5\u51b5\u5462\uff1f\u9996\u5148\u4f1a\u5207\u6362\u5230\u6808Second\uff0c\u518d\u628aQ\u51fa\u6808\uff0cW\u63d0\u5230\u6808\u9876\uff0c\u5e76\u6267\u884cW\u7684onNewIntent\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65f6\u5019\u6309\u8fd4\u56de\u952e\u5c31\u4f1a\u628aSecond\u6808\u4e2d\u7684\u6d3b\u52a8\u4f9d\u6b21\u51fa\u6808\uff0c\u5168\u90e8\u51fa\u5b8c\u540e\u624d\u4f1a\u5207\u6362\u5230\u6808First\u3002<\/p>\n
    singleTask\u7684TaskAffinity\u4e0eallowTaskReparenting\u53c2\u6570
     <\/h3>\n
    \u524d\u9762\u6211\u4eec\u8bb2\u5230\u7ed9singleTask\u6a21\u5f0f\u6307\u5b9a\u8981\u542f\u52a8\u7684\u4efb\u52a1\u6808\u7684\u540d\u5b57\uff0c\u600e\u4e48\u6307\u5b9a\u5462\uff1f\u53ef\u4ee5\u5728AndroidManifest\u4e2d\u6307\u5b9a\u76f8\u5173\u7684\u5c5e\u6027\uff0c\u5982\u4e0b\uff1a<\/p>\n
    <activity><\/activity><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd9\u91cc\u89e3\u91ca\u4e00\u4e0b\u8fd9\u4e24\u4e2a\u53c2\u6570<\/p>\n
      \n
    • taskAffinity\uff1a\u6307\u5b9a\u4efb\u52a1\u6808\u7684\u540d\u5b57\u3002\u9ed8\u8ba4\u7684\u4efb\u52a1\u6808\u662f\u5305\u540d\uff0c\u6240\u4ee5\u4e0d\u80fd\u4ee5\u5305\u540d\u6765\u547d\u540d\u3002<\/li>\n
    • allowTaskReparenting\uff1a\u8fd9\u4e2a\u53c2\u6570\u8868\u793a\u53ef\u4e0d\u53ef\u4ee5\u5207\u6362\u5230\u65b0\u7684\u4efb\u52a1\u6808\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e3atrue\u5e76\u548c\u4e0a\u9762\u7684\u53c2\u6570\u4e00\u8d77\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
      \u6211\u524d\u9762\u8bb2\u5230\u53ef\u4ee5\u7ed9singleTask\u7684\u6d3b\u52a8\u6307\u5b9a\u4e00\u4e2a\u6808\u540d\uff0c\u7136\u540e\u542f\u52a8\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u5207\u6362\u5230\u90a3\u4e2a\u6808\uff0c\u5e76\u628a\u65b0\u7684\u6d3b\u52a8\u653e\u8fdb\u53bb\u3002\u4f46\u662f\u5982\u679c\u8bbe\u7f6eallowTaskReparenting\u53c2\u6570\u4e3afalse\u7684\u8bdd\u662f\u4e0d\u4f1a\u5207\u6362\u5230\u65b0\u7684\u6808\u7684\u3002\u8fd9\u4e2a\u53c2\u6570\u7684\u610f\u601d\u662f\u53ef\u4e0d\u53ef\u4ee5\u628a\u65b0\u7684\u6d3b\u52a8\u8f6c\u79fb\u5230\u65b0\u7684\u4efb\u52a1\u6808\u3002\u7b80\u5355\u70b9\u6765\u8bf4\uff1a\u5f53\u6211\u4eec\u542f\u52a8\u4e00\u4e2asingleTask\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u6d3b\u52a8\u8fd8\u662f\u7559\u5728\u542f\u52a8\u4ed6\u7684\u6d3b\u52a8\u7684\u6808\u4e2d\u7684\u3002\u4f46\u662f\u6211\u4eec\u6307\u5b9a\u4e86taskAffinity\u8fd9\u4e2a\u53c2\u6570\uff0c\u6216\u8005\u542f\u52a8\u7684\u6d3b\u52a8\u662f\u522b\u7684\u5e94\u7528\u4e2d\u7684\u6d3b\u52a8\uff0c\u90a3\u4e48\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u4efb\u52a1\u6808\u3002\u5982\u679callowTaskReparenting\u8fd9\u4e2a\u53c2\u6570\u662ftrue\u7684\u8bdd\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6d3b\u52a8\u5c31\u4f1a\u653e\u5230\u90a3\u4e2a\u65b0\u7684\u4efb\u52a1\u6808\u4e2d\u3002\u8fd9\u6837\u5e94\u8be5\u5c31\u53ef\u4ee5\u660e\u767d\u4e86\u3002\u6240\u4ee5\u8fd9\u4e24\u4e2a\u7ecf\u5e38\u662f\u914d\u5957\u4e00\u8d77\u4f7f\u7528\u7684\u3002<\/p>\n
      \u603b\u7ed3
       <\/h2>\n
      \u6d3b\u52a8\u7684\u542f\u52a8\u6a21\u5f0f\u6709\u56db\u79cd\uff0c\u6bcf\u79cd\u7684\u529f\u80fd\u90fd\u4e0d\u4e00\u6837\uff0c\u53ef\u4ee5\u7ed3\u5408\u5177\u4f53\u9700\u8981\u53bb\u4f7f\u7528\uff0c\u4f46\u662f\u6700\u91cd\u70b9\u8fd8\u662f\u8981\u4e86\u89e3\u4ed6\u7684\u5b9e\u73b0\u539f\u7406\uff0c\u6808\u4e2d\u662f\u600e\u4e48\u53d8\u5316\u7684\uff0c\u8fd9\u4e2a\u662f\u6bd4\u8f83\u91cd\u8981\u7684\u3002\u4e86\u89e3\u8fd9\u4e2a\u4e4b\u540e\u90a3\u4e9b\u7279\u6b8a\u60c5\u51b5\u4e5f\u5c31\u5f88\u5bb9\u6613\u7406\u89e3\u4e86\u3002
      \u4e0a\u9762\u6211\u8bb2\u7684\u53ea\u662f\u7b80\u5355\u7684\u4f7f\u7528\uff0c\u5173\u4e8e\u6d3b\u52a8\u542f\u52a8\u6a21\u5f0f\u8fd8\u6709\u5f88\u591a\u8981\u4e86\u89e3\u3002\u540e\u7eed\u53ef\u80fd\u4f1a\u89e3\u6790\u4e00\u4e0b\uff0c\u8bfb\u8005\u4e5f\u53ef\u4ee5\u81ea\u884c\u53bb\u6df1\u5ea6\u4e86\u89e3\u3002<\/p>\n
      \n  \u76f8\u5173\u514d\u8d39\u63a8\u8350\uff1a\u7f16\u7a0b\u89c6\u9891\u8bfe\u7a0b\n<\/p><\/blockquote>\n
      \u4ee5\u4e0a\u5c31\u662f\u4e00\u8d77\u770b\u770b Activity\u542f\u52a8\u6a21\u5f0f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u4e3b\u8981\u4ecb\u7ecd\u4e86Activity\u542f\u52a8\u6a21\u5f0f\u7684\u76f8\u5173\u8d44\u6599 \u63a8\u8350\uff08\u514d\u8d39\uff09\uff1a \u524d\u8a00 \u5e73\u5e38\u6211\u4eec\u542f\u52a8\u6d3b\u52a8\u7684\u65f6\u5019\u5c31\u662f\u76f4\u63a5startActivity\u6216\u8bb8\u5e76\u6ca1\u6709\u6ce8\u610f\u6d3b\u52a8\u7684\u542f\u52a8\u6a21\u5f0f\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u90fd\u662f\u4ee5\u9ed8\u8ba4\u7684\u542f\u52a8\u6a21\u5f0f\u542f\u52a8\u3002\u4f46\u542f\u52a8\u6a21\u5f0f\u6709\u65f6\u5019\u662f\u6bd4\u8f83\u91cd\u8981\u7684\u3002\u4f8b\u5982\u4e00\u4e2a\u6d3b\u52a8\u4f60\u60f3\u4ed6\u53ea\u542f\u52a8\u4e00\u6b21\u4e0d\u8981\u6709\u591a\u4e2a\u5b9e\u4f8b\uff0c\u90a3\u4e48\u4f60\u53ef\u80fd\u9700\u8981\u628a\u4ed6\u8bbe\u7f6e\u4e3asingleTask\u6a21\u5f0f\u3002\u6240\u4ee5\u6709\u5fc5\u8981\u4e86\u89e3\u4e00\u4e0b\u8fd9\u4e00\u4e9b\u542f\u52a8\u6a21\u5f0f\u3002\u540c\u65f6\u8981\u6ce8\u610f\u4e00\u4e0b\uff0c\u542f\u52a8\u6a21\u5f0f\u2260\u542f\u52a8\u65b9\u5f0f\uff0c\u542f\u52a8\u65b9\u5f0f\u662f\u6307\u663e\u793a\u542f\u52a8\u548c\u9690\u5f0f\u542f\u52a8\uff0c\u4e0d\u8981\u6df7\u6dc6\uff0c\u663e\u793a\u542f\u52a8\u548c\u9690\u5f0f\u542f\u52a8\u540e\u7eed\u6211\u4f1a\u6709\u4e13\u95e8\u7684\u6587\u7ae0\u8bb2\u89e3\u3002 \u5173\u4e8e\u4efb\u52a1\u6808\u7b80\u4ecb \u8981\u4e86\u89e3\u542f\u52a8\u6a21\u5f0f\uff0c\u9996\u5148\u8981\u4e86\u89e3\u4e00\u4e0b\u5173\u4e8e\u4efb\u52a1\u6808\u7684\u6982\u5ff5\u3002\u5173\u4e8e\u4efb\u52a1\u6808\u7684\u5b9e\u73b0\u539f\u7406\u7b49\u6211\u5728\u8fd9\u91cc\u5c31\u5148\u4e0d\u8bf4\u4e86\uff0c\u8fd9\u91cc\u4e3b\u8981\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u4ec0\u4e48\u662f\u4efb\u52a1\u6808\u3002\u6211\u4eec\u542f\u52a8\u7684\u6d3b\u52a8\u5b9e\u4f8b\u90fd\u4f1a\u653e\u5728\u4e00\u4e2a\u53eb\u505a\u4efb\u52a1\u6808\u7684\u4e1c\u897f\u91cc\u9762\u3002\u6211\u4eec\u90fd\u77e5\u9053\u6808\u662f\u201c\u540e\u8fdb\u5148\u51fa\u201d\u7684\u7279\u70b9\u3002\u6253\u4e2a\u6bd4\u65b9\uff0c\u4efb\u52a1\u6808\u5c31\u662f\u4e00\u4e2a\u7fbd\u6bdb\u7403\u7b52\uff0c\u6d3b\u52a8\u5b9e\u4f8b\u5c31\u662f\u4e00\u4e2a\u4e2a\u7fbd\u6bdb\u7403\uff0c\u540e\u653e\u8fdb\u53bb\u7684\u53ea\u80fd\u5148\u62ff\u51fa\u6765\u3002\u6240\u4ee5\u5f53\u6211\u4eec\u542f\u52a8\u4e00\u4e2aapp\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u4efb\u52a1\u6808\uff0c\u7136\u540e\u6211\u4eec\u5c31\u5f80\u91cc\u9762\u4e22\u6d3b\u52a8\u5b9e\u4f8b\u3002\u5f53\u6211\u4eec\u6309\u8fd4\u56de\u9500\u6bc1\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u8fd9\u4e9b\u6d3b\u52a8\u5c31\u4f9d\u6b21\u4ece\u4efb\u52a1\u6808\u91cc\u9762\u51fa\u6765\u3002\u5f53\u7136\uff0c\u4e00\u4e2aapp\u53ef\u4ee5\u62e5\u6709\u591a\u4e2a\u4efb\u52a1\u6808\uff0c\u4f8b\u5982\u4f7f\u7528singleInstence\u542f\u52a8\u7684\u6d3b\u52a8\u5c31\u662f\u5728\u4e00\u4e2a\u72ec\u7acb\u7684\u4efb\u52a1\u6808\u4e2d\u3002\u4e86\u89e3\u5b8c\u4efb\u52a1\u6808\u7684\u6982\u5ff5\uff0c\u63a5\u4e0b\u6765\u5c31\u53ef\u4ee5\u6765\u770b\u770b\u6d3b\u52a8\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f\u3002 \u89e3\u6790Activity\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f standard \u8fd9\u79cd\u662f\u6807\u51c6\u542f\u52a8\u6a21\u5f0f\uff0c\u9ed8\u8ba4\u5c31\u662f\u8fd9\u79cd\u542f\u52a8\u6a21\u5f0f\u3002\u6bcf\u6b21\u542f\u52a8\u8fd9\u79cd\u542f\u52a8\u6a21\u5f0f\u7684\u6d3b\u52a8\u7684\u65f6\u5019\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u5165\u6808\u4e2d\uff0c\u4e0d\u7ba1\u6808\u4e2d\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\u3002\u8fd9\u4e5f\u662f\u6700\u5bb9\u6613\u7406\u89e3\u7684\u3002 singleTop \u987e\u540d\u601d\u4e49\uff0c\u6808\u9876\u662f\u5355\u4e00\u5b9e\u4f8b\u7684\u3002\u4ec0\u4e48\u610f\u601d\u5462\u3002\u5047\u8bbe\u4f60\u73b0\u5728\u542f\u52a8\u4e00\u4e2aActivityA\uff0c\u4f46\u662f\u8fd9\u4e2a\u65f6\u5019\u5df2\u7ecf\u5b58\u5728\u4e00\u4e2aActivityA\u5b9e\u4f8b\u5728\u6808\u9876\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\uff0c\u5c31\u4e0d\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u3002\u4f46\u662f\u5982\u679c\uff0c\u5728\u975e\u6808\u9876\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u8fd8\u662f\u4f1a\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u7684\u3002\u4f8b\u5982\uff0c\u73b0\u5728\u6808\u4e2d\u7684\u6d3b\u52a8\u662f ABC\uff0cA\u5904\u4e8e\u6808\u9876\u3002\u7136\u540e\u6b64\u65f6\u542f\u52a8A\uff0c\u662f\u4e0d\u4f1a\u518d\u521b\u5efa\u4e00\u4e2aA\u6d3b\u52a8\u51fa\u6765\uff0c\u800c\u662f\u6267\u884cA\u7684onNewIntent\u65b9\u6cd5\uff1b\u4f46\u662f\u5982\u679c\u6b64\u65f6\u542f\u52a8C\u6d3b\u52a8\uff0c\u7531\u4e8e\u6808\u9876\u662fA\u4e0d\u662fC\uff0c\u90a3\u4e48\u8fd8\u662f\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684C\u5b9e\u4f8b\u51fa\u6765\uff0c\u6b64\u65f6\u7684\u6808\u60c5\u51b5\u5c31\u662fCABC\u3002 singleTask \u5355\u4e00\u4efb\u52a1\u6a21\u5f0f\u3002\u8fd9\u4e2a\u6a21\u5f0f\u7684\u610f\u601d\u662f\uff0c\u5728\u8be5\u6d3b\u52a8\u7684\u542f\u52a8\u6808\u4e2d\uff0c\u53ea\u80fd\u5b58\u5728\u5355\u4e00\u5b9e\u4f8b\uff0c\u4e0d\u7ba1\u662f\u5426\u4f4d\u4e8e\u6808\u9876\u3002\u4e0e\u5176\u4ed6\u542f\u52a8\u6a21\u5f0f\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u4e2a\u542f\u52a8\u6a21\u5f0f\u53ef\u4ee5\u6307\u5b9a\u6808\u53bb\u542f\u52a8\u3002\u4f8b\u5982\u73b0\u5728\u6709\u4e00\u4e2a\u6808Main\uff0c\u4f46\u662f\u4f60\u53ef\u4ee5\u7ed9\u6d3b\u52a8A\u6307\u5b9a\u4e00\u4e2a\u6808\u540ddev\uff0c\u90a3\u4e48\u542f\u52a8A\u7684\u65f6\u5019\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6808\u53eb\u505adev\u3002\u6240\u4ee5singleTask\u7684\u610f\u601d\u5c31\u662f\uff0c\u5f53\u4f60\u542f\u52a8\u4e00\u4e2a\u542f\u52a8\u6a21\u5f0f\u4e3asingleTask\u7684\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u5982\u679c\u6808\u4e2d\u6ca1\u6709\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u90a3\u4e48\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u5165\u6808\u4e2d\uff1b\u5982\u679c\u6307\u5b9a\u6808\u4e2d\u5b58\u5728\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u4f8b\u5982\u6808\u4e2d\u6709ABC\uff0c\u7136\u540e\u4f60\u542f\u52a8B\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\u4e0d\u4f1a\u53bb\u521b\u5efa\u65b0\u7684B\u5b9e\u4f8b\uff0c\u800c\u662f\u628aB\u653e\u5230\u6808\u9876\uff0c\u5e76\u628aA\u9876\u51fa\u53bb\uff0c\u518d\u6267\u884cB\u7684onNewIntent\u65b9\u6cd5\uff0c\u6b64\u65f6\u6808\u7684\u60c5\u51b5\u5c31\u662fBC\u3002\u7ec6\u5fc3\u7684\u8bfb\u8005\u4f1a\u53d1\u73b0\u201c\u9876\u51fa\u53bb\u201d\u3002\u662f\u7684\uff0c\u6211\u4eec\u90fd\u77e5\u9053\u6808\u662f\u540e\u8fdb\u5148\u51fa\u7684\u7279\u70b9\uff0c\u4f8b\u5982\u4f60\u5f80\u7b52\u91cc\u653e\u4e863\u4e2a\u7fbd\u6bdb\u7403\uff0c\u90a3\u4f60\u60f3\u8981\u62ff\u5230\u4e2d\u95f4\u90a3\u4e2a\u7fbd\u6bdb\u7403\uff0c\u662f\u4e0d\u662f\u53ea\u80fd\u5148\u628a\u4e0a\u9762\u90a3\u4e2a\u62bd\u51fa\u6765\u5462\uff0c\u540c\u6837\u7684\u9053\u7406\uff0c\u8981\u60f3\u628aB\u63d0\u5230\u6808\u9876\uff0c\u90a3\u4e48\u5fc5\u987b\u628aA\u9876\u51fa\u6765\u3002\u53ef\u80fd\u4f1a\u6709\u5f88\u591a\u8bfb\u8005\u8bef\u4ee5\u4e3a\u542f\u52a8\u540e\u662fBAC\uff0c\u4f46\u5176\u5b9e\u662fBC\uff0c\u56e0\u4e3aA\u5f97\u5148\u51fa\u6808\uff0cB\u624d\u80fd\u51fa\u6765\u3002\u540c\u7406\uff0c\u5982\u679c\u6808\u4e2d\u662fADFBC\uff0c\u8fd9\u4e2a\u542f\u52a8B\uff0c\u4e5f\u662fBC\uff0c\u4e0a\u9762\u7684\u5168\u90e8\u88ab\u51fa\u6808\u4e86\u3002 singleInstance \u5355\u4f8b\u6a21\u5f0f\u3002\u8fd9\u4e2a\u662fsingleTask\u7684\u5f3a\u5316\u7248\u672c\u3002\u4ed6\u4f1a\u81ea\u5df1\u65b0\u5efa\u4e00\u4e2a\u6808\u5e76\u628a\u8fd9\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u8fdb\u53bb\uff0c\u800c\u4e14\u8fd9\u4e2a\u6808\u53ea\u80fd\u653e\u8fd9\u4e2a\u6d3b\u52a8\u5b9e\u4f8b\u3002\u6240\u4ee5\u5f53\u91cd\u590d\u542f\u52a8\u8fd9\u4e2a\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u53ea\u8981\u4ed6\u5b58\u5728\uff0c\u90fd\u662f\u8c03\u7528\u8fd9\u4e2a\u6d3b\u52a8onNewIntent\u65b9\u6cd5\u5e76\u5207\u6362\u5230\u8fd9\u4e2a\u6808\u4e2d\uff0c\u5e76\u4e0d\u4f1a\u53bb\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\u3002 \u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u7684\u4e24\u79cd\u65b9\u6cd5 \u4e86\u89e3\u4e86\u6d3b\u52a8\u7684\u56db\u79cd\u542f\u52a8\u6a21\u5f0f\uff0c\u63a5\u4e0b\u6765\u770b\u770b\u5982\u4f55\u7ed9\u4ed6\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\u3002 \u9759\u6001\u8bbe\u7f6e \u9759\u6001\u8bbe\u7f6e\u5c31\u662f\u5728AndroidManifest\u4e2d\u7ed9\u5177\u4f53\u6d3b\u52a8\u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u3002\u901a\u8fc7\u7ed9\u6d3b\u52a8\u6307\u5b9alaunchMode\u53c2\u6570\u6765\u8bbe\u7f6e\u542f\u52a8\u6a21\u5f0f\u3002\u4f8b\u5982\uff1a  <activity><\/activity> \u767b\u5f55\u540e\u590d\u5236 \u52a8\u6001\u8bbe\u7f6e \u52a8\u6001\u8bbe\u7f6e\u662f\u5728\u542f\u52a8\u6d3b\u52a8\u7684\u65f6\u5019\u518d\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u4f8b\u5982\uff1a Intent intent = new Intent(); intent.setClass(this,SecondActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); \u767b\u5f55\u540e\u590d\u5236 \u53ef\u4ee5\u770b\u5230\u6211\u4eec\u901a\u8fc7intent.addFlags\u8fd9\u4e2a\u65b9\u6cd5\u6765\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\u6765\u6307\u5b9a\u542f\u52a8\u6a21\u5f0f\uff0c\u5176\u4ed6\u7684\u53c2\u6570\u6709\uff1a FLAG_ACTIVITY_NEW_TASK\uff1asingleTask\u6a21\u5f0f FLAG_ACTIVITY_SINGLE_TOP\uff1asingleTop\u6a21\u5f0f FLAG_ACTIVITY_CLEAR_TOP:\u6e05\u9664\u8be5\u6d3b\u52a8\u4e0a\u65b9\u7684\u6240\u6709\u6d3b\u52a8\u3002\u4e00\u822c\u548csingleTask\u4e00\u8d77\u4f7f\u7528\u3002\u4f46\u662f\u5982\u679c\u4f60\u7684\u542f\u52a8\u6a21\u5f0f\u662fstandard\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6d3b\u52a8\u8fde\u4ed6\u4e4b\u4e0a\u7684\u6240\u6709\u6d3b\u52a8\u90fd\u4f1a\u88ab\u51fa\u6808\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u653e\u8fdb\u53bb\u3002\u4f8b\u5982\u73b0\u5728\u6808\u4e2d\u662fABCD\uff0c\u4ee5FLAG_ACTIVITY_CLEAR_TOP+standard\u6a21\u5f0f\u542f\u52a8C\u7684\u65f6\u5019\uff0c\u9996\u5148\u6e05\u7406\u6389ABC\uff0c\u662f\u7684\uff0cC\u4e5f\u4f1a\u88ab\u6e05\u7406\uff0c\u7136\u540e\u518d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684C\u653e\u8fdb\u53bb\uff0c\u6267\u884c\u4e4b\u540e\u5c31\u662fCD\u3002 \u7279\u522b\u6ce8\u610f\u7684\u5751 singleInstance\u8fd4\u56de\u4efb\u52a1\u6808 \u73b0\u5728\u6a21\u62df\u4e00\u4e2a\u573a\u666f\uff1a\u73b0\u5728\u6709\u4e09\u4e2a\u6d3b\u52a8 A,B,C\u3002A\u548cC\u7684\u542f\u52a8\u6a21\u5f0f\u90fd\u662fstandard\uff0cB\u7684\u542f\u52a8\u6a21\u5f0f\u662fsingleInstance\u3002\u5148\u542f\u52a8A\uff0c\u518d\u542f\u52a8B\uff0c\u7136\u540e\u518d\u542f\u52a8C\u3002\u8fd9\u4e2a\u65f6\u5019\u95ee\u9898\u6765\u4e86\uff0c\u5982\u679c\u6211\u8fd9\u4e2a\u65f6\u5019\u6309\u4e0b\u8fd4\u56de\u952e\uff0c\u662f\u56de\u5230B\u5417\uff1f\u7b54\u6848\u662f\u56de\u5230A\u3002\u518d\u6309\u4e00\u4e0b\u5462\uff0c\u8fd4\u56de\u684c\u9762\u5417\uff1f\u7b54\u6848\u662f\u56de\u5230B\uff0c\u518d\u6309\u4e00\u4e0b\u518d\u56de\u5230\u684c\u9762\u3002\u5176\u5b9e\u4e0d\u96be\u7406\u89e3\u3002\u6211\u4eec\u90fd\u77e5\u9053singleInstance\u4f1a\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684\u6808\uff0c\u5f53\u6211\u4eec\u542f\u52a8A\u7684\u65f6\u5019\uff0cA\u4f4d\u4e8e\u6808First\u4e2d\uff0c\u542f\u52a8B\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6808Second\u5e76\u628aB\u5b9e\u4f8b\u653e\u8fdb\u53bb\u3002\u8fd9\u4e2a\u65f6\u5019\u518d\u542f\u52a8C\uff0c\u5c31\u4f1a\u5207\u6362\u5230\u6808FIrst\uff0c\u56e0\u4e3asingleInstance\u521b\u5efa\u7684\u6808\u53ea\u80fd\u653e\u4e00\u4e2a\uff0c\u6240\u4ee5C\u4f1a\u653e\u5230\u6808First\u4e2d\uff0c\u5f53\u6309\u4e0b\u8fd4\u56de\u7684\u65f6\u5019\uff0c\u6808First\u4e2d\u7684\u6d3b\u52a8\u5c31\u4f1a\u4f9d\u6b21\u51fa\u6808\uff0c\u76f4\u5230\u5168\u90e8\u51fa\u5b8c\uff0c\u624d\u4f1a\u5207\u6362\u5230\u6808Second\u4e2d\u3002\u6240\u4ee5\u8981\u6ce8\u610f\u8fd9\u4e2a\u70b9\u3002 singleTask\u591a\u4efb\u52a1\u6808\u542f\u52a8\u95ee\u9898 \u8fd9\u4e2a\u95ee\u9898\u548c\u4e0a\u9762singleTop\u7684\u672c\u8d28\u662f\u4e00\u6837\u7684\u3002\u6a21\u62df\u4e00\u4e2a\u573a\u666f\uff1a\u73b0\u5728\u6709\u4e24\u4e2a\u6808\uff1aFirst\uff1aABC\uff1bSecond\uff1aQWE\u3002\u6808First\u4f4d\u4e8e\u524d\u53f0\uff0c\u6808Second\u4f4d\u4e8e\u540e\u53f0\u3002A\u4f4d\u4e8e\u6808\u9876\u3002\u8fd9\u4e2a\u65f6\u5019\u4ee5singleTask\u7684\u6a21\u5f0f\u542f\u52a8W\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\u6837\u7684\u60c5\u51b5\u5462\uff1f\u9996\u5148\u4f1a\u5207\u6362\u5230\u6808Second\uff0c\u518d\u628aQ\u51fa\u6808\uff0cW\u63d0\u5230\u6808\u9876\uff0c\u5e76\u6267\u884cW\u7684onNewIntent\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65f6\u5019\u6309\u8fd4\u56de\u952e\u5c31\u4f1a\u628aSecond\u6808\u4e2d\u7684\u6d3b\u52a8\u4f9d\u6b21\u51fa\u6808\uff0c\u5168\u90e8\u51fa\u5b8c\u540e\u624d\u4f1a\u5207\u6362\u5230\u6808First\u3002 singleTask\u7684TaskAffinity\u4e0eallowTaskReparenting\u53c2\u6570 \u524d\u9762\u6211\u4eec\u8bb2\u5230\u7ed9singleTask\u6a21\u5f0f\u6307\u5b9a\u8981\u542f\u52a8\u7684\u4efb\u52a1\u6808\u7684\u540d\u5b57\uff0c\u600e\u4e48\u6307\u5b9a\u5462\uff1f\u53ef\u4ee5\u5728AndroidManifest\u4e2d\u6307\u5b9a\u76f8\u5173\u7684\u5c5e\u6027\uff0c\u5982\u4e0b\uff1a <activity><\/activity> \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u91cc\u89e3\u91ca\u4e00\u4e0b\u8fd9\u4e24\u4e2a\u53c2\u6570 taskAffinity\uff1a\u6307\u5b9a\u4efb\u52a1\u6808\u7684\u540d\u5b57\u3002\u9ed8\u8ba4\u7684\u4efb\u52a1\u6808\u662f\u5305\u540d\uff0c\u6240\u4ee5\u4e0d\u80fd\u4ee5\u5305\u540d\u6765\u547d\u540d\u3002 allowTaskReparenting\uff1a\u8fd9\u4e2a\u53c2\u6570\u8868\u793a\u53ef\u4e0d\u53ef\u4ee5\u5207\u6362\u5230\u65b0\u7684\u4efb\u52a1\u6808\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e3atrue\u5e76\u548c\u4e0a\u9762\u7684\u53c2\u6570\u4e00\u8d77\u4f7f\u7528\u3002 \u6211\u524d\u9762\u8bb2\u5230\u53ef\u4ee5\u7ed9singleTask\u7684\u6d3b\u52a8\u6307\u5b9a\u4e00\u4e2a\u6808\u540d\uff0c\u7136\u540e\u542f\u52a8\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u5207\u6362\u5230\u90a3\u4e2a\u6808\uff0c\u5e76\u628a\u65b0\u7684\u6d3b\u52a8\u653e\u8fdb\u53bb\u3002\u4f46\u662f\u5982\u679c\u8bbe\u7f6eallowTaskReparenting\u53c2\u6570\u4e3afalse\u7684\u8bdd\u662f\u4e0d\u4f1a\u5207\u6362\u5230\u65b0\u7684\u6808\u7684\u3002\u8fd9\u4e2a\u53c2\u6570\u7684\u610f\u601d\u662f\u53ef\u4e0d\u53ef\u4ee5\u628a\u65b0\u7684\u6d3b\u52a8\u8f6c\u79fb\u5230\u65b0\u7684\u4efb\u52a1\u6808\u3002\u7b80\u5355\u70b9\u6765\u8bf4\uff1a\u5f53\u6211\u4eec\u542f\u52a8\u4e00\u4e2asingleTask\u6d3b\u52a8\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u6d3b\u52a8\u8fd8\u662f\u7559\u5728\u542f\u52a8\u4ed6\u7684\u6d3b\u52a8\u7684\u6808\u4e2d\u7684\u3002\u4f46\u662f\u6211\u4eec\u6307\u5b9a\u4e86taskAffinity\u8fd9\u4e2a\u53c2\u6570\uff0c\u6216\u8005\u542f\u52a8\u7684\u6d3b\u52a8\u662f\u522b\u7684\u5e94\u7528\u4e2d\u7684\u6d3b\u52a8\uff0c\u90a3\u4e48\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u4efb\u52a1\u6808\u3002\u5982\u679callowTaskReparenting\u8fd9\u4e2a\u53c2\u6570\u662ftrue\u7684\u8bdd\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6d3b\u52a8\u5c31\u4f1a\u653e\u5230\u90a3\u4e2a\u65b0\u7684\u4efb\u52a1\u6808\u4e2d\u3002\u8fd9\u6837\u5e94\u8be5\u5c31\u53ef\u4ee5\u660e\u767d\u4e86\u3002\u6240\u4ee5\u8fd9\u4e24\u4e2a\u7ecf\u5e38\u662f\u914d\u5957\u4e00\u8d77\u4f7f\u7528\u7684\u3002 \u603b\u7ed3 \u6d3b\u52a8\u7684\u542f\u52a8\u6a21\u5f0f\u6709\u56db\u79cd\uff0c\u6bcf\u79cd\u7684\u529f\u80fd\u90fd\u4e0d\u4e00\u6837\uff0c\u53ef\u4ee5\u7ed3\u5408\u5177\u4f53\u9700\u8981\u53bb\u4f7f\u7528\uff0c\u4f46\u662f\u6700\u91cd\u70b9\u8fd8\u662f\u8981\u4e86\u89e3\u4ed6\u7684\u5b9e\u73b0\u539f\u7406\uff0c\u6808\u4e2d\u662f\u600e\u4e48\u53d8\u5316\u7684\uff0c\u8fd9\u4e2a\u662f\u6bd4\u8f83\u91cd\u8981\u7684\u3002\u4e86\u89e3\u8fd9\u4e2a\u4e4b\u540e\u90a3\u4e9b\u7279\u6b8a\u60c5\u51b5\u4e5f\u5c31\u5f88\u5bb9\u6613\u7406\u89e3\u4e86\u3002\u4e0a\u9762\u6211\u8bb2\u7684\u53ea\u662f\u7b80\u5355\u7684\u4f7f\u7528\uff0c\u5173\u4e8e\u6d3b\u52a8\u542f\u52a8\u6a21\u5f0f\u8fd8\u6709\u5f88\u591a\u8981\u4e86\u89e3\u3002\u540e\u7eed\u53ef\u80fd\u4f1a\u89e3\u6790\u4e00\u4e0b\uff0c\u8bfb\u8005\u4e5f\u53ef\u4ee5\u81ea\u884c\u53bb\u6df1\u5ea6\u4e86\u89e3\u3002 \u76f8\u5173\u514d\u8d39\u63a8\u8350\uff1a\u7f16\u7a0b\u89c6\u9891\u8bfe\u7a0b \u4ee5\u4e0a\u5c31\u662f\u4e00\u8d77\u770b\u770b Activity\u542f\u52a8\u6a21\u5f0f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-33727","post","type-post","status-publish","format-standard","hentry","category-19"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33727","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=33727"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33727\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=33727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=33727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=33727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}