{"id":1088,"date":"2026-07-18T15:58:15","date_gmt":"2026-07-18T07:58:15","guid":{"rendered":"http:\/\/www.longxiapro.com\/?p=1088"},"modified":"2026-07-18T15:58:15","modified_gmt":"2026-07-18T07:58:15","slug":"shangyejiyingyonganquanzhinenghuafangancong-classloader-hexinluojidaoquanlianlujiagujishuluode","status":"publish","type":"post","link":"https:\/\/www.longxiapro.com\/index.php\/1088\/","title":{"rendered":"\u5546\u4e1a\u7ea7\u5e94\u7528\u5b89\u5168\u667a\u80fd\u5316\u65b9\u6848\uff1a\u4ece ClassLoader \u6838\u5fc3\u903b\u8f91\u5230\u5168\u94fe\u8def\u52a0\u56fa\u6280\u672f\u843d\u5730"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728\u79fb\u52a8\u7aef\u5e94\u7528\u52a0\u56fa\u4e0e\u70ed\u4fee\u590d\u7684\u5de5\u7a0b\u5b9e\u8df5\u4e2d\uff0c\u5f88\u591a\u5f00\u53d1\u8005\u80fd\u591f\u901a\u8fc7\u73b0\u6210\u65b9\u6848\u5b8c\u6210\u52a0\u58f3\u3001\u8865\u4e01\u6ce8\u5165\u7b49\u64cd\u4f5c\uff0c\u4f46\u5f80\u5f80\u5bf9\u5e95\u5c42\u903b\u8f91\u5b58\u5728\u8ba4\u77e5\u65ad\u5c42 \u2014\u2014 \u77e5\u9053\u64cd\u4f5c\u6b65\u9aa4\uff0c\u5374\u4e0d\u7406\u89e3\u65b9\u6848\u751f\u6548\u7684\u6838\u5fc3\u539f\u7406\uff0c\u8fd9\u76f4\u63a5\u5bfc\u81f4\u65b9\u6848\u9002\u914d\u6027\u5dee\u3001\u7cfb\u7edf\u7248\u672c\u517c\u5bb9\u6027\u95ee\u9898\u9891\u53d1\u3001\u96be\u4ee5\u5e94\u5bf9\u590d\u6742\u7684\u4e1a\u52a1\u9632\u62a4\u9700\u6c42\u3002\u8981\u6784\u5efa\u7a33\u5b9a\u3001\u9ad8\u6548\u3001\u53ef\u6269\u5c55\u7684\u5e94\u7528\u9632\u62a4\u4f53\u7cfb\uff0c\u5fc5\u987b\u4ece ClassLoader\uff08\u7c7b\u52a0\u8f7d\u5668\uff09\u7684\u5e95\u5c42\u539f\u7406\u51fa\u53d1\uff0c\u6253\u901a \u201c\u539f\u7406 &#8211; \u5b9e\u73b0 &#8211; \u4f18\u5316\u201d \u7684\u5b8c\u6574\u903b\u8f91\u94fe\u6761\uff0c\u540c\u65f6\u7ed3\u5408 AI \u6280\u672f\u5b9e\u73b0\u52a0\u56fa\u5168\u6d41\u7a0b\u7684\u667a\u80fd\u5316\u3001\u81ea\u52a8\u5316\uff0c\u5f62\u6210\u53ef\u843d\u5730\u7684\u5168\u94fe\u8def\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4e00\u3001ClassLoader \u6838\u5fc3\u673a\u5236\u4e0e\u7c7b\u52a0\u8f7d\u5e95\u5c42\u903b\u8f91<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">ClassLoader \u662f Java\/Android \u865a\u62df\u673a\u4e2d\u8d1f\u8d23\u52a0\u8f7d\u7c7b\u7684\u6838\u5fc3\u7ec4\u4ef6\u3002\u5728 Android \u4f53\u7cfb\u4e2d\uff0cdex \u6587\u4ef6\u53ea\u662f\u5b58\u50a8\u7c7b\u5b57\u8282\u7801\u7684\u9759\u6001\u6587\u4ef6\uff0c\u5373\u4f7f\u88ab\u590d\u5236\u5230\u5e94\u7528\u79c1\u6709\u76ee\u5f55\uff0c\u7cfb\u7edf\u4e5f\u65e0\u6cd5\u81ea\u52a8\u8bc6\u522b\u5176\u4e2d\u7684\u7c7b\u5e76\u5c06\u5176\u8f6c\u5316\u4e3a\u53ef\u8fd0\u884c\u7684 Class \u5bf9\u8c61\u3002\u800c ClassLoader \u7684\u6838\u5fc3\u4f5c\u7528\uff0c\u5c31\u662f\u4e3a\u865a\u62df\u673a\u6307\u5b9a\u7c7b\u7684\u641c\u7d22\u8def\u5f84\uff0c\u8ba9\u865a\u62df\u673a\u80fd\u591f\u5728\u5bf9\u5e94\u7684 dex\/apk\/jar \u6587\u4ef6\u4e2d\u627e\u5230\u76ee\u6807\u7c7b\u7684\u5b57\u8282\u7801\uff0c\u5e76\u5b8c\u6210\u7c7b\u7684\u52a0\u8f7d\u4e0e\u5b9e\u4f8b\u5316\u3002\u4f7f\u7528 DexClassLoader \u52a0\u8f7d\u5916\u90e8 dex \u7684\u672c\u8d28\uff0c\u5c31\u662f\u4e3a\u865a\u62df\u673a\u65b0\u589e\u4e00\u6761\u7c7b\u641c\u7d22\u8def\u5f84\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u52a8\u6001\u52a0\u8f7d\u4e0e\u5e94\u7528\u52a0\u56fa\u800c\u8a00\uff0cAndroid \u7c7b\u52a0\u8f7d\u5668\u4e2d\u6709\u4e09\u4e2a\u6838\u5fc3\u6210\u5458\u81f3\u5173\u91cd\u8981\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DexFile<\/strong>\uff1a\u662f dex \u6587\u4ef6\u5728\u8fd0\u884c\u65f6\u7684\u5c01\u88c5\u4f53\uff0c\u7c7b\u52a0\u8f7d\u5668\u6700\u7ec8\u901a\u8fc7\u5b83\u4ece dex \u6587\u4ef6\u4e2d\u67e5\u627e\u5e76\u52a0\u8f7d\u76ee\u6807\u7c7b\uff1b\u5f00\u53d1\u8005\u4e5f\u53ef\u4ee5\u901a\u8fc7\u8be5\u7ed3\u6784\u83b7\u53d6 dex \u5185\u7684\u7c7b\u540d\u5217\u8868\u3001\u6587\u4ef6\u8def\u5f84\u4e0e\u5e95\u5c42\u53e5\u67c4\u3002<\/li>\n\n\n\n<li><strong>dexElements<\/strong>\uff1a\u662f Element \u7c7b\u7684\u6570\u7ec4\uff0c\u6bcf\u4e2a Element \u5b9e\u4f8b\u5305\u542b\u4e00\u4e2a DexFile \u5bf9\u8c61\u3002\u8be5\u6570\u7ec4\u76f4\u63a5\u51b3\u5b9a\u4e86\u7c7b\u52a0\u8f7d\u5668\u7684\u641c\u7d22\u8303\u56f4\u4e0e\u7c7b\u67e5\u627e\u7684\u5148\u540e\u987a\u5e8f\u3002<\/li>\n\n\n\n<li><strong>PathList<\/strong>\uff1a\u662f BaseDexClassLoader \u7684\u5185\u90e8\u6210\u5458\uff0c\u7528\u4e8e\u5b58\u50a8\u7c7b\u52a0\u8f7d\u7684\u5168\u90e8\u641c\u7d22\u8def\u5f84\uff0c\u5176\u6838\u5fc3\u5c31\u662f dexElements \u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u8005\u7684\u5c42\u7ea7\u5305\u542b\u5173\u7cfb\u4e3a\uff1a<code>BaseDexClassLoader \u2192 PathList \u2192 dexElements\u6570\u7ec4 \u2192 Element \u2192 DexFile<\/code>\u3002\u901a\u8fc7\u53cd\u5c04\u8c03\u7528 DexFile \u7684 getClassNameList \u65b9\u6cd5\uff0c\u5373\u53ef\u904d\u5386\u6253\u5370\u51fa\u7c7b\u52a0\u8f7d\u5668\u641c\u7d22\u8def\u5f84\u4e0b\u7684\u6240\u6709\u7c7b\uff0c\u76f4\u89c2\u9a8c\u8bc1\u7c7b\u52a0\u8f7d\u5668\u7684\u641c\u7d22\u8303\u56f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5de5\u7a0b\u843d\u5730\u4e2d\uff0cAndroid \u7cfb\u7edf\u7248\u672c\u788e\u7247\u5316\u4e25\u91cd\uff0c\u4e0d\u540c\u7248\u672c\u4e2d ClassLoader \u7684\u5185\u90e8\u5b57\u6bb5\u3001\u7ed3\u6784\u5c42\u7ea7\u5b58\u5728\u5dee\u5f02\uff0c\u7eaf\u4eba\u5de5\u9010\u7248\u672c\u9002\u914d\u6210\u672c\u6781\u9ad8\u3002AI \u9759\u6001\u5206\u6790\u5de5\u5177\u53ef\u901a\u8fc7\u8bad\u7ec3 Android \u7cfb\u7edf\u6e90\u7801\u6570\u636e\u96c6\uff0c\u81ea\u52a8\u8bc6\u522b\u4e0d\u540c\u7248\u672c\u7684\u5b57\u6bb5\u540d\u79f0\u3001\u7ed3\u6784\u53d8\u5316\uff0c\u81ea\u52a8\u751f\u6210\u9002\u914d\u591a\u7cfb\u7edf\u7248\u672c\u7684\u53cd\u5c04\u8c03\u7528\u903b\u8f91\uff0c\u5c06\u7ed3\u6784\u89e3\u6790\u4e0e\u9002\u914d\u7684\u4eba\u529b\u6210\u672c\u964d\u4f4e 80% \u4ee5\u4e0a\uff0c\u540c\u65f6\u5927\u5e45\u63d0\u5347\u65b9\u6848\u7684\u7248\u672c\u8986\u76d6\u8303\u56f4\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4e8c\u3001\u53cc\u4eb2\u59d4\u6d3e\u673a\u5236\u4e0e Android \u7c7b\u52a0\u8f7d\u4f53\u7cfb<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">JVM \u7684\u7c7b\u52a0\u8f7d\u5668\u91c7\u7528 Bootstrap\u2192Extension\u2192Application \u4e09\u5c42\u59d4\u6d3e\u67b6\u6784\uff0cAndroid \u5728\u6b64\u57fa\u7840\u4e0a\u505a\u4e86\u7b80\u5316\u9002\u914d\uff0c\u5f62\u6210\u4e86\u4ee5 BootClassLoader\u3001PathClassLoader\u3001DexClassLoader \u4e3a\u6838\u5fc3\u7684\u7c7b\u52a0\u8f7d\u4f53\u7cfb\uff0c\u800c\u8d2f\u7a7f\u6574\u4e2a\u4f53\u7cfb\u7684\u6838\u5fc3\u89c4\u5219\u5c31\u662f\u53cc\u4eb2\u59d4\u6d3e\u673a\u5236\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53cc\u4eb2\u59d4\u6d3e\u662f\u7c7b\u52a0\u8f7d\u7684\u6838\u5fc3\u67e5\u627e\u89c4\u5219\uff1a\u5f53\u4e00\u4e2a\u7c7b\u52a0\u8f7d\u5668\u6536\u5230\u7c7b\u52a0\u8f7d\u8bf7\u6c42\u65f6\uff0c\u5b83\u9996\u5148\u4e0d\u4f1a\u81ea\u5df1\u5c1d\u8bd5\u52a0\u8f7d\uff0c\u800c\u662f\u5c06\u8bf7\u6c42\u59d4\u6d3e\u7ed9\u7236\u52a0\u8f7d\u5668\u53bb\u5b8c\u6210\uff0c\u6bcf\u4e00\u5c42\u7c7b\u52a0\u8f7d\u5668\u90fd\u9075\u5faa\u8fd9\u4e2a\u903b\u8f91\uff0c\u6700\u7ec8\u6240\u6709\u52a0\u8f7d\u8bf7\u6c42\u90fd\u4f1a\u4f20\u9012\u5230\u9876\u5c42\u7684\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff1b\u53ea\u6709\u5f53\u7236\u52a0\u8f7d\u5668\u65e0\u6cd5\u5b8c\u6210\u52a0\u8f7d\u8bf7\u6c42\u65f6\uff0c\u5b50\u52a0\u8f7d\u5668\u624d\u4f1a\u5c1d\u8bd5\u81ea\u5df1\u52a0\u8f7d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u673a\u5236\u7684\u6838\u5fc3\u4f18\u52bf\u6709\u4e24\u70b9\uff1a\u4e00\u662f\u907f\u514d\u7c7b\u7684\u91cd\u590d\u52a0\u8f7d\uff0c\u4fdd\u8bc1\u4e00\u4e2a\u7c7b\u5728\u865a\u62df\u673a\u4e2d\u53ea\u88ab\u52a0\u8f7d\u4e00\u6b21\uff1b\u4e8c\u662f\u4fdd\u8bc1\u6838\u5fc3\u7c7b\u7684\u5b89\u5168\u6027\uff0c\u9632\u6b62\u7cfb\u7edf\u6838\u5fc3\u7c7b\u88ab\u81ea\u5b9a\u4e49\u52a0\u8f7d\u5668\u7be1\u6539\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u6253\u5370\u7c7b\u52a0\u8f7d\u5668\u7684\u59d4\u6d3e\u94fe\u53ef\u4ee5\u53d1\u73b0\uff0cAndroid \u5e94\u7528\u8fdb\u7a0b\u7684\u9ed8\u8ba4\u7c7b\u52a0\u8f7d\u5668\u59d4\u6d3e\u5173\u7cfb\u4e3a\uff1a<code>PathClassLoader \u2192 BootClassLoader<\/code>\uff0c\u5176\u4e2d\u4f4d\u4e8e\u94fe\u8def\u524d\u7aef\u7684 PathClassLoader\uff0c\u5c31\u662f\u5e94\u7528\u8fdb\u7a0b\u7684\u9ed8\u8ba4\u7c7b\u52a0\u8f7d\u5668 mClassLoader\uff0c\u7cfb\u7edf\u6240\u6709\u7684\u7c7b\u67e5\u627e\u8bf7\u6c42\u90fd\u4ece\u5b83\u53d1\u8d77\uff0c\u6cbf\u7740\u59d4\u6d3e\u94fe\u9010\u7ea7\u5411\u4e0a\u59d4\u6258\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e5f\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u76f4\u63a5\u521b\u5efa\u7684 DexClassLoader \u65e0\u6cd5\u52a0\u8f7d Activity \u7b49\u7cfb\u7edf\u7ec4\u4ef6\uff1a\u7cfb\u7edf\u542f\u52a8\u7ec4\u4ef6\u65f6\uff0c\u4f7f\u7528\u7684\u662f\u9ed8\u8ba4\u7684 PathClassLoader\uff0c\u800c\u81ea\u884c\u521b\u5efa\u7684 DexClassLoader \u4e0d\u5728\u9ed8\u8ba4\u59d4\u6d3e\u94fe\u4e2d\uff0c\u7cfb\u7edf\u7684\u7c7b\u67e5\u627e\u6d41\u7a0b\u6839\u672c\u4e0d\u4f1a\u8bbf\u95ee\u5230\u5b83\uff0c\u6700\u7ec8\u5c31\u4f1a\u629b\u51fa ClassNotFoundException\u3002\u5728\u65b9\u6848\u9a8c\u8bc1\u9636\u6bb5\uff0cAI \u53ef\u4ee5\u6a21\u62df\u5b8c\u6574\u7684\u7c7b\u52a0\u8f7d\u59d4\u6d3e\u94fe\u8def\uff0c\u9488\u5bf9\u76ee\u6807\u5e94\u7528\u7684 dex 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\u4e2d\u7684 mClassLoader<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u65b9\u6848\u662f\u6574\u4f53\u52a0\u56fa\u7684\u6838\u5fc3\u903b\u8f91\uff1a\u901a\u8fc7\u53cd\u5c04\u5148\u83b7\u53d6 ActivityThread \u5b9e\u4f8b\uff0c\u518d\u4ece\u5176 mPackages \u96c6\u5408\u4e2d\u53d6\u51fa\u5bf9\u5e94\u5305\u540d\u7684 LoadedApk\uff0c\u6700\u540e\u5c06 LoadedApk \u4e2d\u7684 mClassLoader \u5b57\u6bb5\uff0c\u66ff\u6362\u4e3a\u5305\u542b\u89e3\u5bc6\u540e dex \u7684 DexClassLoader\u3002\u66ff\u6362\u64cd\u4f5c\u901a\u5e38\u5728\u5e94\u7528\u7684 attachBaseContext \u9636\u6bb5\u5b8c\u6210\uff0c\u540e\u7eed\u7cfb\u7edf\u6240\u6709\u7684\u7c7b\u52a0\u8f7d\u8bf7\u6c42\uff0c\u90fd\u4f1a\u901a\u8fc7\u65b0\u7684 ClassLoader \u6267\u884c\uff0c\u4ece\u800c\u627e\u5230\u89e3\u5bc6\u540e\u7684 dex \u4e2d\u7684\u7c7b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>AI \u843d\u5730\u8d4b\u80fd<\/strong>\uff1aAI \u53ef\u81ea\u52a8\u8bc6\u522b\u4e0d\u540c Android \u7248\u672c\u4e2d ActivityThread\u3001LoadedApk \u7684\u5b57\u6bb5\u540d\u79f0\u4e0e\u8bbf\u95ee\u6743\u9650\uff0c\u81ea\u52a8\u751f\u6210\u517c\u5bb9\u591a\u7248\u672c\u7684\u53cd\u5c04\u4ee3\u7801\uff1b\u540c\u65f6\u53ef\u57fa\u4e8e\u5e94\u7528\u7684 dex \u6570\u91cf\u3001\u7c7b\u5206\u5e03\u7279\u5f81\uff0c\u667a\u80fd\u4f18\u5316 ClassLoader \u7684\u52a0\u8f7d\u7b56\u7565\uff0c\u964d\u4f4e\u52a0\u56fa\u5bf9\u5e94\u7528\u542f\u52a8\u901f\u5ea6\u7684\u5f71\u54cd\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u65b9\u6848 2\uff1a\u5c06 DexClassLoader \u63d2\u5165\u59d4\u6d3e\u94fe\u8def<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u65b9\u6848\u4e0d\u76f4\u63a5\u66ff\u6362\u9876\u5c42\u7684 PathClassLoader\uff0c\u800c\u662f\u4fee\u6539\u5176 parent \u59d4\u6d3e\u5173\u7cfb\uff0c\u5c06\u81ea\u5b9a\u4e49\u7684 DexClassLoader \u63d2\u5165 PathClassLoader \u4e0e BootClassLoader \u4e4b\u95f4\uff0c\u5f62\u6210<code>PathClassLoader \u2192 DexClassLoader \u2192 BootClassLoader<\/code>\u7684\u5168\u65b0\u59d4\u6d3e\u94fe\u8def\u3002\u76f8\u6bd4\u76f4\u63a5\u66ff\u6362\u7684\u65b9\u6848\uff0c\u8be5\u65b9\u5f0f\u4fdd\u7559\u4e86\u539f PathClassLoader \u7684\u9876\u5c42\u4f4d\u7f6e\uff0c\u4ee3\u7801\u6539\u52a8\u66f4\u5c0f\u3001\u9690\u853d\u6027\u66f4\u5f3a\uff0c\u517c\u5bb9\u6027\u98ce\u9669\u4e5f\u66f4\u4f4e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>AI \u843d\u5730\u8d4b\u80fd<\/strong>\uff1aAI \u53ef\u6a21\u62df\u4e0d\u540c\u59d4\u6d3e\u94fe\u8def\u4e0b\u7684\u7c7b\u52a0\u8f7d\u6027\u80fd\u4e0e\u517c\u5bb9\u6027\u8868\u73b0\uff0c\u9488\u5bf9\u5e94\u7528\u7684\u4e1a\u52a1\u7279\u5f81\u4e0e\u9002\u914d\u8303\u56f4\uff0c\u81ea\u52a8\u51b3\u7b56\u662f\u5426\u91c7\u7528\u63d2\u5165\u5f0f\u65b9\u6848\uff1b\u540c\u65f6\u53ef\u68c0\u6d4b\u59d4\u6d3e\u94fe\u8def\u4e2d\u7684\u7c7b\u51b2\u7a81\u98ce\u9669\uff0c\u63d0\u524d\u89c4\u907f\u7c7b\u52a0\u8f7d\u5f02\u5e38\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u65b9\u6848 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