{"id":4571,"date":"2021-09-02T08:54:20","date_gmt":"2021-09-02T00:54:20","guid":{"rendered":"http:\/\/122.152.205.50\/wordpress\/?p=4571"},"modified":"2021-09-02T08:54:20","modified_gmt":"2021-09-02T00:54:20","slug":"%e9%87%8d%e8%bd%bdclassloader%e4%b8%80%e4%b8%aa%e6%9e%84%e9%80%a0%e6%96%b9%e6%b3%95%e7%bb%99basedexclassloader%e7%94%a8","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571","title":{"rendered":"\u91cd\u8f7dClassLoader\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\u7ed9BaseDexClassLoader\u7528"},"content":{"rendered":"<p>\u6700\u8fd1\uff0c\u5728\u7814\u7a76Android\u7684dex\u52a0\u8f7d\u76f8\u5173\u7684\u6e90\u7801\uff0c\u60f3\u5728DexClassLoader\u3001BaseDexClassLoader\u3001ClassLoader\u52a0\u70b9\u65e5\u5fd7\u3002\u4f46\u662f\u65e5\u5fd7\u53c8\u4e0d\u80fd\u76f4\u63a5\u52a0\uff0c\u5f97\u901a\u8fc7dexPath\u9650\u5236\u4e00\u4e0b\uff0c\u5426\u5219\u7cfb\u7edf\u8d77\u4e0d\u6765\uff0c\u56e0\u4e3aClassLoader\u4f1a\u88ab\u9891\u7e41\u8c03\u7528\u3002<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571\/#BaseDexClassLoader\" title=\"BaseDexClassLoader\">BaseDexClassLoader<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571\/#ClassLoader\" title=\"ClassLoader\">ClassLoader<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571\/#%E7%BC%96%E8%AF%91\" title=\"\u7f16\u8bd1\">\u7f16\u8bd1<\/a><ul class=\"ez-toc-list-level-2\"><li class=\"ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571\/#%E6%A8%A1%E6%8B%9F%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E5%9C%BA%E6%99%AF\" title=\"\u6a21\u62df\u6700\u7b80\u5355\u7684\u573a\u666f\">\u6a21\u62df\u6700\u7b80\u5355\u7684\u573a\u666f<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=4571\/#%E9%97%AE%E9%A2%98%E7%BB%88%E4%BA%8E%E8%A7%A3%E5%86%B3\" title=\"\u95ee\u9898\u7ec8\u4e8e\u89e3\u51b3\">\u95ee\u9898\u7ec8\u4e8e\u89e3\u51b3<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"BaseDexClassLoader\"><\/span>BaseDexClassLoader<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\u6e90\u7801\u76ee\u5f55\uff1alibcore\/dalvik\/src\/main\/java\/dalvik\/system<br \/>\n\u7f16\u8bd1\u76ee\u5f55\uff1alibcore<br \/>\n<img src=\"https:\/\/upload-images.jianshu.io\/upload_images\/18328858-eace14e9dd7236dc.jpg?imageMogr2\/auto-orient\/strip%7CimageView2\/2\/w\/1240\" alt=\"basedex.jpg\" \/><\/p>\n<h1><span class=\"ez-toc-section\" id=\"ClassLoader\"><\/span>ClassLoader<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\u6e90\u7801\u76ee\u5f55\uff1alibcore\/libdvm\/src\/main\/java\/java\/lang<br \/>\n\u7f16\u8bd1\u76ee\u5f55\uff1alibcore<br \/>\n<img src=\"https:\/\/upload-images.jianshu.io\/upload_images\/18328858-5ef2cf11a0b5e90c.jpg?imageMogr2\/auto-orient\/strip%7CimageView2\/2\/w\/1240\" alt=\"classloader.jpg\" \/><\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E7%BC%96%E8%AF%91\"><\/span>\u7f16\u8bd1<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p><img src=\"https:\/\/upload-images.jianshu.io\/upload_images\/18328858-33ad5079f83347e8.png?imageMogr2\/auto-orient\/strip%7CimageView2\/2\/w\/1240\" alt=\"image.png\" \/><br \/>\n\u6211\u60f3\u7740\uff0c\u662f\u4e0d\u662fBaseDexClassLoader\u548cClassLoader\u4e0d\u80fd\u540c\u65f6\u4fee\u6539\uff0c\u6211\u5148\u628aBaseDexClassLoader\u4fdd\u6301\u4e0d\u4fee\u6539\uff08\u4f7f\u7528\u539f\u6765\u7684\u4e0d\u5e26dexPath\u7684super\u65b9\u6cd5\uff09\uff0c\u7f16\u8bd1\u4e00\u6b21\u4e4b\u540e\uff0c\u518d\u4fee\u6539\u3002\u7ed3\u679c\u8fd8\u662f\u5982\u6b64\u3002<\/p>\n<p>\u662f\u4e0d\u662f\u7531\u4e8e\u6784\u9020\u65b9\u6cd5\u7684\u7279\u6b8a\u6027\u5bfc\u81f4\u7f16\u8bd1\u4e0d\u901a\u8fc7\u5462\uff1f\u6211\u5c1d\u8bd5\u7740\u5728ClassLoader\u91cc\u65b0\u589e\u4e2a\u65b9\u6cd5\uff0cBaseDexClassLoader\u4ecd\u7136\u4e00\u6837\u65e0\u6cd5\u8c03\u7528\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u4e0a\u9762\u7684\u95ee\u9898\u7684\u672c\u8d28\u5f52\u7ed3\u4e3a\uff1a<strong>\u540c\u4e00\u76ee\u5f55\u4e0b\uff0c\u4e24\u4e2aJava\u7c7bA\u548cB\uff0c\u5047\u5982B\u589e\u52a0\u4e2a\u65b9\u6cd5\uff0cA\u5f15\u7528B\u7684\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u7f16\u8bd1\u4e0d\u901a\u8fc7\uff0c\u62a5A\u627e\u4e0d\u5230B\u7684\u8fd9\u4e2a\u65b9\u6cd5\u3002<\/strong><br \/>\n\u767e\u5ea6\u4e86\u534a\u5929\u4e5f\u6ca1\u6709\u4efb\u4f55\u7684\u8d44\u6599\u8bf4\u660e\u76f8\u5173\u7684\u95ee\u9898\uff0c\u53ea\u6709\u81ea\u5df1\u4e00\u70b9\u70b9\u8bd5\u63a2\u4e86\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E6%8B%9F%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E5%9C%BA%E6%99%AF\"><\/span>\u6a21\u62df\u6700\u7b80\u5355\u7684\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/www.jianshu.com\/p\/8b77c62273c0\">https:\/\/www.jianshu.com\/p\/8b77c62273c0<\/a>\uff0c\u8fd9\u91cc\u6b63\u5e38\u751f\u6210Jar\u5305\u3002\u53ef\u89c1\u662flibcore\u7684\u7279\u5b9a\u73af\u5883\u5bfc\u81f4\u4e86\u7f16\u8bd1\u5931\u8d25\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E9%97%AE%E9%A2%98%E7%BB%88%E4%BA%8E%E8%A7%A3%E5%86%B3\"><\/span>\u95ee\u9898\u7ec8\u4e8e\u89e3\u51b3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u641e\u4e86\u597d\u51e0\u5929\uff0c\u7ec8\u4e8e\u660e\u767d\u4e86\uff0c\u770b\u7f16\u8bd1\u65e5\u5fd7\u662f\u7f16\u8bd1core-libart.jar\u5305\uff0c\u662f<strong>art<\/strong>!!!<br \/>\n\u800cClassLoader\u6709\u4e24\u4e2a\u7c7b\uff1a<br \/>\n<img src=\"https:\/\/upload-images.jianshu.io\/upload_images\/18328858-101b44473a5b5a40.png?imageMogr2\/auto-orient\/strip%7CimageView2\/2\/w\/1240\" alt=\"image.png\" \/><br \/>\n\u6211\u53ea\u6539\u4e86libdvm\u4e0b\u7684ClassLoader\uff0c\u800c\u73b0\u5728\u7f16\u8bd1\u7684\u662fcore-libart.jar\uff0c\u6240\u4ee5\u628a\u4e24\u4e2a\u76ee\u5f55\u4e0b\u7684ClassLoader\u90fd\u6539\u4e00\u4e0b\u5c31\u597d\u4e86\u3002<br \/>\n\u4f46\u662f\uff0c\u53d1\u73b0\u5b89\u88c5app\u7684\u65f6\u5019\uff0c\u5b89\u88c5\u4e0d\u4e0a\u53bb\uff0c\u62a5\u9519\uff1a<\/p>\n<pre><code class=\"line-numbers\">I\/dalvikvm( 2564): java.lang.NullPointerException:\n\nI\/dalvikvm( 2564):  at java.util.logging.Logger.log(Logger.java:1036)\n\nI\/dalvikvm( 2564):  at java.util.logging.Logger$1.publish(Logger.java:81)\n\nI\/dalvikvm( 2564):  at java.util.logging.Logger.log(Logger.java:924)\n\nI\/dalvikvm( 2564):  at java.util.logging.Logger.warning(Logger.java:853)\n\nI\/dalvikvm( 2564):  at dalvik.system.DexFile.log(DexFile.java:93)\n\nI\/dalvikvm( 2564):  at dalvik.system.DexFile.openDexFile(DexFile.java:315)\n\nI\/dalvikvm( 2564):  at dalvik.system.DexFile.&lt;init&gt;(DexFile.java:82)\n\nI\/dalvikvm( 2564):  at dalvik.system.DexFile.&lt;init&gt;(DexFile.java:61)\n\nI\/dalvikvm( 2564):  at dalvik.system.DexPathList.loadDexFile(DexPathList.java:263)\n<\/code><\/pre>\n<p>\u5728ClassLoader\u91cc\u5f15\u7528Logger\u6253\u65e5\u5fd7\uff0c\u5c31\u4f1a\u62a5\u4e0a\u9762\u7684\u9519\u8bef\u3002\u6240\u4ee5\u628aLogger\u91cc\u52a0\u4e2anull\u5224\u65ad\u3002<br \/>\n<img src=\"https:\/\/upload-images.jianshu.io\/upload_images\/18328858-09d5bd6244d4971e.jpg?imageMogr2\/auto-orient\/strip%7CimageView2\/2\/w\/1240\" alt=\"log.jpg\" \/><\/p>\n<button class=\"simplefavorite-button\" data-postid=\"4571\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\uff0c\u5728\u7814\u7a76Android\u7684dex\u52a0\u8f7d\u76f8\u5173\u7684\u6e90\u7801\uff0c\u60f3\u5728DexClassLoader\u3001BaseDexC [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[199],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/4571"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4571"}],"version-history":[{"count":1,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/4571\/revisions"}],"predecessor-version":[{"id":4572,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/4571\/revisions\/4572"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4571"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}