{"id":1468,"date":"2017-05-21T15:39:37","date_gmt":"2017-05-21T07:39:37","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=1468"},"modified":"2017-05-21T15:39:37","modified_gmt":"2017-05-21T07:39:37","slug":"android-%e7%83%ad%e6%9b%b4%e6%96%b0%e7%83%ad%e5%8d%87%e7%ba%a7%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90%e5%92%8c%e5%8d%b3%e6%97%b6%e7%94%9f%e6%95%88%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=1468","title":{"rendered":"Android \u70ed\u66f4\u65b0\u70ed\u5347\u7ea7\u8bbf\u95ee\u6743\u9650\u548c\u5373\u65f6\u751f\u6548\u95ee\u9898"},"content":{"rendered":"

\n\t\u524d\u6bb5\u65f6\u95f4 IOS<\/a> \u53d6\u6d88\u4e86\u76f8\u5173\u6846\u67b6\u7684\u70ed\u66f4\uff0c\u5728 CSDN<\/a> \u793e\u533a\u4e13\u5bb6\u7fa4\u5f15\u8d77\u4e86\u5927\u91cf\u7684\u8ba8\u8bba\u3002\u5927\u5bb6\u7eb7\u7eb7\u53d1\u8868\u81ea\u5df1\u7684\u770b\u6cd5\u548c\u6280\u672f\u89e3\u51b3\u65b9\u6848\u3002\u672c\u6587\u4e0d\u662f IOS \u76f8\u5173\u7684\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u4e3b\u8981\u56f4\u7ed5 Android<\/a> \u7684\u70ed\u66f4\u65b0\u8fdb\u884c\u5b66\u4e60\uff01\n<\/p>\n

\n\t\u7efc\u5408\u524d\u9762\u7684\u51e0\u7bc7\u6587\u7ae0\u300aAndroid\u70ed\u4fee\u590d\u5347\u7ea7\u539f\u7406\u548c\u5b9e\u8df5<\/a>\u300b\u3001\u300aAndroid\u70ed\u4fee\u590d\u5347\u7ea7\u3001\u517c\u5bb9\u6027\u95ee\u9898\u7684\u6839\u6e90<\/a>\u300b\u3001\u300a\u8be6\u89e3 Android \u70ed\u66f4\u65b0\u5347\u7ea7\u5982\u4f55\u7a81\u7834\u5e95\u5c42\u7ed3\u6784\u5dee\u5f02\uff1f<\/a>\u300b\u3002\n<\/p>\n

\n\t\u770b\u4e86\u524d\u9762\u7684\u51e0\u7bc7\u6587\u7ae0\uff0c\u4f60\u53ef\u80fd\u4f1a\u6709\u7591\u60d1\uff1a\u6211\u4eec\u53ea\u662f\u66ff\u6362\u4e86ArtMethod\u7684\u5185\u5bb9\uff0c\u4f46\u65b0\u66ff\u6362\u7684\u65b9\u6cd5\u7684\u6240\u5c5e\u7c7b\uff0c\u548c\u539f\u5148\u65b9\u6cd5\u7684\u6240\u5c5e\u7c7b\uff0c\u662f\u4e0d\u540c\u7684\u7c7b\uff0c\u88ab\u66ff\u6362\u7684\u65b9\u6cd5\u6709\u6743\u9650\u8bbf\u95ee\u8fd9\u4e2a\u7c7b\u7684\u5176\u4ed6private\u65b9\u6cd5\u5417\uff1f\n<\/p>\n

\n\t\u4ee5\u8fd9\u6bb5\u7b80\u5355\u7684\u4ee3\u7801\u4e3a\u4f8b\n<\/p>\n

\r\npublic class Demo{\r\n\tDemo{\r\n\t\tfunc();\r\n\t}\r\n\tprivate void func(){}\r\n}<\/pre>\n
\n\tDemo\u6784\u9020\u51fd\u6570\u8c03\u7528\u79c1\u6709\u51fd\u6570func\u6240\u5bf9\u5e94\u7684Dex Code\u548cNative Code\u4e3a\n<\/p>\n
\n\t\"Dex\n<\/p>\n
\n\t\u8fd9\u4e2a\u8c03\u7528\u903b\u8f91\u548c\u4e4b\u524dActivity\u7684\u4f8b\u5b50\u5927\u540c\u5c0f\u5f02\uff0c\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\u662f\uff0c\u5728\u6784\u9020\u51fd\u6570\u8c03\u7528\u540c\u4e00\u4e2a\u7c7b\u4e0b\u7684\u79c1\u6709\u65b9\u6cd5func\u65f6\uff0c\u6ca1\u6709\u505a\u4efb\u4f55\u6743\u9650\u68c0\u67e5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8fd9\u65f6\u5373\u4f7f\u6211\u628afunc\u65b9\u6cd5\u7684\u5077\u6881\u6362\u67f1\uff0c\u4e5f\u80fd\u76f4\u63a5\u8df3\u8fc7\u53bb\u6b63\u5e38\u6267\u884c\u800c\u4e0d\u4f1a\u62a5\u9519\u3002\n<\/p>\n
\n\t\u53ef\u4ee5\u63a8\u6d4b\uff0c\u5728dex2oat\u751f\u6210AOT\u673a\u5668\u7801\u65f6\u662f\u6709\u505a\u4e00\u4e9b\u68c0\u67e5\u548c\u4f18\u5316\u7684\uff0c\u7531\u4e8e\u5728dex2oat\u7f16\u8bd1\u673a\u5668\u7801\u65f6\u786e\u8ba4\u4e86\u4e24\u4e2a\u65b9\u6cd5\u540c\u5c5e\u4e00\u4e2a\u7c7b\uff0c\u6240\u4ee5\u673a\u5668\u7801\u4e2d\u5c31\u4e0d\u5b58\u5728\u6743\u9650\u68c0\u67e5\u7684\u76f8\u5173\u4ee3\u7801\u3002\n<\/p>\n
\n\t\u540c\u5305\u540d\u4e0b\u7684\u6743\u9650\u95ee\u9898
\n<\/h2>\n
\n\t\u4f46\u662f\uff0c\u5e76\u975e\u6240\u6709\u65b9\u6cd5\u90fd\u53ef\u4ee5\u8fd9\u4e48\u987a\u5229\u5730\u8fdb\u884c\u8bbf\u95ee\u7684\u3002\u6211\u4eec\u53d1\u73b0\u8865\u4e01\u4e2d\u7684\u7c7b\u5728\u8bbf\u95ee\u540c\u5305\u540d\u4e0b\u7684\u7c7b\u65f6\uff0c\u4f1a\u62a5\u51fa\u8bbf\u95ee\u6743\u9650\u5f02\u5e38\uff1a\n<\/p>\n
\n\t\"\u8bbf\u95ee\u6743\u9650\u5f02\u5e38\"\n<\/p>\n
\n\t\u867d\u7136com.patch.demo.BaseBug\u548ccom.patch.demo.MyClass\u662f\u540c\u4e00\u4e2a\u5305com.patch.demo\u4e0b\u9762\u7684\uff0c\u4f46\u662f\u7531\u4e8e\u6211\u4eec\u66ff\u6362\u4e86com.patch.demo.BaseBug.test\uff0c\u800c\u8fd9\u4e2a\u66ff\u6362\u4e86\u7684BaseBug.test\u662f\u4ece\u8865\u4e01\u5305\u7684Classloader\u52a0\u8f7d\u7684\uff0c\u4e0e\u539f\u5148\u7684base\u5305\u5c31\u4e0d\u662f\u540c\u4e00\u4e2aClassloader\u4e86\uff0c\u8fd9\u6837\u5c31\u5bfc\u81f4\u4e24\u4e2a\u7c7b\u65e0\u6cd5\u88ab\u5224\u522b\u4e3a\u540c\u5305\u540d\u3002\u5177\u4f53\u7684\u6821\u9a8c\u903b\u8f91\u662f\u5728\u865a\u62df\u673a\u4ee3\u7801\u7684Class::IsInSamePackage\u4e2d\uff1a\n<\/p>\n
\n\t\"Classloader\"\n<\/p>\n
\n\t\u5173\u952e\u70b9\u5728\u4e8e\uff0cClass loaders must match\u8fd9\u884c\u6ce8\u91ca\u3002\n<\/p>\n
\n\t\u77e5\u9053\u4e86\u539f\u56e0\u5c31\u597d\u89e3\u51b3\u4e86\uff0c\u6211\u4eec\u53ea\u8981\u8bbe\u7f6e\u65b0\u7c7b\u7684Classloader\u4e3a\u539f\u6765\u7c7b\u5c31\u53ef\u4ee5\u4e86\u3002\u800c\u8fd9\u4e00\u6b65\u540c\u6837\u4e0d\u9700\u8981\u5728JNI\u5c42\u6784\u9020\u5e95\u5c42\u7684\u7ed3\u6784\uff0c\u53ea\u9700\u8981\u901a\u8fc7\u53cd\u5c04\u8fdb\u884c\u8bbe\u7f6e\u3002\u8fd9\u6837\u4ecd\u65e7\u80fd\u591f\u4fdd\u8bc1\u826f\u597d\u7684\u517c\u5bb9\u6027\u3002\n<\/p>\n
\n\t\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a\n<\/p>\n
\n\t\"Classloader\"\n<\/p>\n
\n\t\u8fd9\u6837\u5c31\u89e3\u51b3\u4e86\u540c\u5305\u540d\u4e0b\u7684\u8bbf\u95ee\u6743\u9650\u95ee\u9898\u3002\n<\/p>\n
\n\t\u53cd\u5c04\u8c03\u7528\u975e\u9759\u6001\u65b9\u6cd5\u4ea7\u751f\u7684\u95ee\u9898
\n<\/h2>\n
\n\t\u5f53\u4e00\u4e2a\u975e\u9759\u6001\u65b9\u6cd5\u88ab\u70ed\u66ff\u6362\u540e\uff0c\u5728\u53cd\u5c04\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0c\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\n<\/p>\n
\n\t\u6bd4\u5982\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff1a\n<\/p>\n
\r\n\/\/BaseBug.test\u65b9\u6cd5\u5df2\u7ecf\u88ab\u70ed\u66ff\u6362\u4e86\u3002\r\n... ...\r\nBaseBug bb = new BaseBug();\r\nMethod testMeth = BaseBug.class.getDeclaredMethod("test");\r\ntestMeth.invoke(bb);<\/pre>\n
\n\tinvoke\u7684\u65f6\u5019\u5c31\u4f1a\u62a5\uff1a\n<\/p>\n
\n\t\"Caused\n<\/p>\n
\n\t\u8fd9\u91cc\u9762\uff0cexpected receiver\u7684BaseBug\uff0c\u548cgot\u5230\u7684BaseBug\uff0c\u867d\u7136\u90fd\u53ebcom.patch.demo.BaseBug\uff0c\u4f46\u5374\u662f\u4e0d\u540c\u7684\u7c7b\u3002\n<\/p>\n
\n\t\u524d\u8005\u662f\u88ab\u70ed\u66ff\u6362\u7684\u65b9\u6cd5\u6240\u5c5e\u7684\u7c7b\uff0c\u7531\u4e8e\u6211\u4eec\u628a\u5b83\u7684ArtMethod\u7684declaring_class_\u66ff\u6362\u4e86\uff0c\u56e0\u6b64\u5c31\u662f\u65b0\u7684\u8865\u4e01\u7c7b\u3002\u800c\u540e\u8005\u4f5c\u4e3a\u88ab\u8c03\u7528\u7684\u5b9e\u4f8b\u5bf9\u8c61bb\u7684\u6240\u5c5e\u7c7b\uff0c\u662f\u539f\u6709\u7684BaseBug\u3002\u4e24\u8005\u662f\u4e0d\u540c\u7684\u3002\n<\/p>\n
\n\t\u5728\u53cd\u5c04invoke\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0c\u5728\u5e95\u5c42\u4f1a\u8c03\u7528\u5230InvokeMethod\uff1a\n<\/p>\n
\n\t\"InvokeMethod\"\n<\/p>\n
\n\t\u8fd9\u91cc\u9762\u4f1a\u8c03\u7528VerifyObjectIsClass\u51fd\u6570\u505a\u9a8c\u8bc1\u3002\n<\/p>\n
\n\t\"Method.invoke\"\n<\/p>\n
\n\to\u8868\u793aMethod.invoke\u4f20\u5165\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c\u4e5f\u5c31\u662f\u4f5c\u7528\u7684\u5bf9\u8c61\u3002
\n\tc\u8868\u793aArtMethod\u6240\u5c5e\u7684Class\u3002\n<\/p>\n
\n\t\u56e0\u6b64\uff0c\u53ea\u6709o\u662fc\u7684\u4e00\u4e2a\u5b9e\u4f8b\u624d\u80fd\u591f\u901a\u8fc7\u9a8c\u8bc1\uff0c\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u540e\u9762\u7684\u53cd\u5c04\u8c03\u7528\u6d41\u7a0b\u3002\n<\/p>\n
\n\t\u7531\u6b64\u53ef\u77e5\uff0c\u8fd9\u79cd\u70ed\u66ff\u6362\u65b9\u5f0f\u6240\u66ff\u6362\u7684\u975e\u9759\u6001\u65b9\u6cd5\uff0c\u5728\u8fdb\u884c\u53cd\u5c04\u8c03\u7528\u65f6\uff0c\u7531\u4e8eVerifyObjectIsClass\u65f6\u65e7\u7c7b\u548c\u65b0\u7c7b\u4e0d\u5339\u914d\uff0c\u5c31\u4f1a\u5bfc\u81f4\u6821\u9a8c\u4e0d\u901a\u8fc7\uff0c\u4ece\u800c\u629b\u51fa\u4e0a\u9762\u90a3\u4e2a\u5f02\u5e38\u3002\n<\/p>\n
\n\t\u90a3\u4e3a\u4ec0\u4e48\u65b9\u6cd5\u662f\u975e\u9759\u6001\u624d\u6709\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u56e0\u4e3a\u5982\u679c\u662f\u9759\u6001\u65b9\u6cd5\uff0c\u662f\u5728\u7c7b\u7684\u7ea7\u522b\u76f4\u63a5\u8fdb\u884c\u8c03\u7528\u7684\uff0c\u5c31\u4e0d\u9700\u8981\u63a5\u6536\u5bf9\u8c61\u5b9e\u4f8b\u4f5c\u4e3a\u53c2\u6570\u3002\u6240\u4ee5\u5c31\u6ca1\u6709\u8fd9\u65b9\u9762\u7684\u68c0\u67e5\u4e86\u3002\n<\/p>\n
\n\t\u5bf9\u4e8e\u8fd9\u79cd\u53cd\u5c04\u8c03\u7528\u975e\u9759\u6001\u65b9\u6cd5\u7684\u95ee\u9898\uff0c\u6211\u4eec\u4f1a\u91c7\u7528\u53e6\u4e00\u79cd\u51b7\u542f\u52a8\u673a\u5236\u5bf9\u4ed8\uff0c\u672c\u6587\u5728\u6700\u540e\u4f1a\u8bf4\u660e\u5982\u4f55\u89e3\u51b3\u3002\n<\/p>\n
\n\t\u5373\u65f6\u751f\u6548\u6240\u5e26\u6765\u7684\u9650\u5236
\n<\/h2>\n
\n\t\u9664\u4e86\u53cd\u5c04\u7684\u95ee\u9898\uff0c\u50cf\u672c\u65b9\u6848\u4ee5\u53caAndfix\u8fd9\u6837\u76f4\u63a5\u5728\u8fd0\u884c\u671f\u4fee\u6539\u5e95\u5c42\u7ed3\u6784\u7684\u70ed\u4fee\u590d\uff0c\u90fd\u5b58\u5728\u7740\u4e00\u4e2a\u9650\u5236\uff0c\u90a3\u5c31\u662f\u53ea\u80fd\u652f\u6301\u65b9\u6cd5\u7684\u66ff\u6362\u3002\u800c\u5bf9\u4e8e\u8865\u4e01\u7c7b\u91cc\u9762\u5b58\u5728\u65b9\u6cd5\u589e\u52a0\u548c\u51cf\u5c11\uff0c\u4ee5\u53ca\u6210\u5458\u5b57\u6bb5\u7684\u589e\u52a0\u548c\u51cf\u5c11\u7684\u60c5\u51b5\uff0c\u90fd\u662f\u4e0d\u9002\u7528\u7684\u3002\n<\/p>\n
\n\t\u539f\u56e0\u662f\u8fd9\u6837\u7684\uff0c\u4e00\u65e6\u8865\u4e01\u7c7b\u4e2d\u51fa\u73b0\u4e86\u65b9\u6cd5\u7684\u589e\u52a0\u548c\u51cf\u5c11\uff0c\u5c31\u4f1a\u5bfc\u81f4\u8fd9\u4e2a\u7c7b\u4ee5\u53ca\u6574\u4e2aDex\u7684\u65b9\u6cd5\u6570\u7684\u53d8\u5316\u3002\u65b9\u6cd5\u6570\u7684\u53d8\u5316\u4f34\u968f\u7740\u65b9\u6cd5\u7d22\u5f15\u7684\u53d8\u5316\uff0c\u8fd9\u6837\u5728\u8bbf\u95ee\u65b9\u6cd5\u65f6\u5c31\u65e0\u6cd5\u6b63\u5e38\u5730\u7d22\u5f15\u5230\u6b63\u786e\u7684\u65b9\u6cd5\u4e86\u3002\n<\/p>\n
\n\t\u800c\u5982\u679c\u5b57\u6bb5\u53d1\u751f\u4e86\u589e\u52a0\u548c\u51cf\u5c11\uff0c\u548c\u65b9\u6cd5\u53d8\u5316\u7684\u60c5\u51b5\u4e00\u6837\uff0c\u6240\u6709\u5b57\u6bb5\u7684\u7d22\u5f15\u90fd\u4f1a\u53d1\u751f\u53d8\u5316\u3002\u5e76\u4e14\u66f4\u4e25\u91cd\u7684\u95ee\u9898\u662f\uff0c\u5982\u679c\u5728\u7a0b\u5e8f\u8fd0\u884c\u4e2d\u95f4\u67d0\u4e2a\u7c7b\u7a81\u7136\u589e\u52a0\u4e86\u4e00\u4e2a\u5b57\u6bb5\uff0c\u90a3\u4e48\u5bf9\u4e8e\u539f\u5148\u5df2\u7ecf\u4ea7\u751f\u7684\u8fd9\u4e2a\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5b83\u4eec\u8fd8\u662f\u539f\u6765\u7684\u7ed3\u6784\uff0c\u8fd9\u662f\u65e0\u6cd5\u6539\u53d8\u7684\u3002\u800c\u65b0\u65b9\u6cd5\u4f7f\u7528\u5230\u8fd9\u4e9b\u8001\u7684\u5b9e\u4f8b\u5bf9\u8c61\u65f6\uff0c\u8bbf\u95ee\u65b0\u589e\u5b57\u6bb5\u5c31\u4f1a\u4ea7\u751f\u4e0d\u53ef\u9884\u671f\u7684\u7ed3\u679c\u3002\n<\/p>\n
\n\t\u4e0d\u8fc7\u65b0\u589e\u4e00\u4e2a\u5b8c\u6574\u7684\u3001\u539f\u5148\u5305\u91cc\u9762\u4e0d\u5b58\u5728\u7684\u65b0\u7c7b\u662f\u53ef\u4ee5\u7684\uff0c\u8fd9\u4e2a\u4e0d\u53d7\u9650\u5236\u3002\n<\/p>\n
\n\t\u603b\u4e4b\uff0c\u53ea\u6709\u4e24\u79cd\u60c5\u51b5\u662f\u4e0d\u9002\u7528\u7684\uff1a\n<\/p>\n
    \n
  1. \n\t\t\u5f15\u8d77\u539f\u6709\u4e86\u7c7b\u4e2d\u53d1\u751f\u7ed3\u6784\u53d8\u5316\u7684\u4fee\u6539\n\t<\/li>\n
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    \n\t\u603b\u7ed3
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    \n\t\u8bf4\u660e\uff1a\n<\/p>\n
      \n
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    4. \n\t\tHotfix 1.X\u5df2\u7ecf\u652f\u6301\u7edd\u5927\u90e8\u5206\u4e3b\u6d41\u624b\u673a\uff0c\u53ea\u662f\u5728X86\u8bbe\u5907\u4ee5\u53ca\u4fee\u6539\u4e86\u865a\u62df\u673a\u5e95\u5c42\u7ed3\u6784\u7684ROM\u4e0a\u4e0d\u652f\u6301\u3002\n\t<\/li>\n
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      \"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/<\/p>
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