拷贝patch文件拷贝至私有目录，然后调用.：
protected static boolean tryRecoverDexFiles(Tinker manager, ShareSecurityCheck checker, Context context,String patchVersionDirectory, File patchFile) {String dexMeta = checker.getMetaContentMap().get(DEX_META_FILE);boolean result = patchDexExtractViaDexDiff(context, patchVersionDirectory, dexMeta, patchFile);return result;}- 1
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直接看xDiff
private static boolean patchDexExtractViaDexDiff(Context context, String patchVersionDirectory, String meta, final File patchFile) {String dir = patchVersionDirectory + "/" + DEX_PATH + "/";if (!extractDexDiffInternals(context, dir, meta, patchFile, TYPE_DEX)) {TinkerLog.w(TAG, "patch recover, extractDiffInternals fail");return false;}final Tinker manager = Tinker.with(context);File dexFiles = new File(dir);File[] files = dexFiles.listFiles();...files遍历执行：DexFile.loadDexreturn true;}- 1
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核心代码主要在als中：
private static boolean extractDexDiffInternals(Context context, String dir, String meta, File patchFile, int type) {//parse metaArrayList patchList = new ArrayList<>();ShareDexDiffPatchInfo.parseDexDiffPatchInfo(meta, patchList);File directory = new File(dir);//I think it is better to extract the raw files from apkTinker manager = Tinker.with(context);ZipFile apk = null;ZipFile patch = null;ApplicationInfo applicationInfo = context.getApplicationInfo();String apkPath = applicationInfo.sourceDir; //base.apkapk = new ZipFile(apkPath);patch = new ZipFile(patchFile);for (ShareDexDiffPatchInfo info : patchList) {final String infoPath = info.path;String patchRealPath;if (infoPath.equals("")) {patchRealPath = info.rawName;} else {patchRealPath = info.path + "/" + info.rawName;}File extractedFile = new File(dir + info.realName);ZipEntry patchFileEntry = patch.getEntry(patchRealPath);ZipEntry rawApkFileEntry = apk.getEntry(patchRealPath);patchDexFile(apk, patch, rawApkFileEntry, patchFileEntry, info, extractedFile);}return true;}- 1
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这里的代码比较关键了，可以看出首先解析了meta里面的信息，meta中包含了patch中每个dex的相关数据 。然后通过拿到，其实就是本机apk的路径以及patch文件；根据mate中的信息开始遍历，其实就是取出对应的dex文件，最后通过对两个dex文件做合并 。- HA Keepalived案例一：Keepalived双机热备精讲
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