【Android 逆向】整体加固脱壳 ( DexClassLoader 加载 dex 流程分析 | DexPathList 中根据 File 加载 DexFile | loadDexFile 分析 )

/*package*/ final class DexPathList {
    private static Element[] makeDexElements(ArrayList<File> files, File optimizedDirectory,
                                             ArrayList<IOException> suppressedExceptions) {
        ArrayList<Element> elements = new ArrayList<Element>();
        for (File file : files) {
            File zip = null;
            DexFile dex = null;
            String name = file.getName();
            if (name.endsWith(DEX_SUFFIX)) {
                // Raw dex file (not inside a zip/jar).
                try {
                    dex = loadDexFile(file, optimizedDirectory);
                } catch (IOException ex) {
                }
            } else if (name.endsWith(APK_SUFFIX) || name.endsWith(JAR_SUFFIX)
                    || name.endsWith(ZIP_SUFFIX)) {
                zip = file;
                try {
                    dex = loadDexFile(file, optimizedDirectory);
                } catch (IOException suppressed) {
                }
    }
  }
  }
}

/*package*/ final class DexPathList {
    /**
     * Constructs a {@code DexFile} instance, as appropriate depending
     * on whether {@code optimizedDirectory} is {@code null}.
     */
    private static DexFile loadDexFile(File file, File optimizedDirectory)
            throws IOException {
        if (optimizedDirectory == null) {
            return new DexFile(file);
        } else {
            String optimizedPath = optimizedPathFor(file, optimizedDirectory);
            return DexFile.loadDex(file.getPath(), optimizedPath, 0);
        }
    }
}