【Android 安全】DEX 加密 ( 代理 Application 开发 | 加载 dex 文件 | 使用反射获取方法创建本应用的 dexElements | 各版本创建 dex 数组源码对比 )（一）

A n d r o i d   4.4   ( K i t K a t   A P I   19 ) \rm Android \ 4.4 \ ( KitKat \ API \ 19 )Android 4.4 (KitKat API 19) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String libraryPath, File optimizedDirectory) {
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions);
  }
    /**
     * 创建一个数组 ,  每个数组元素都是 dex 路径名称 .
     */
    private static Element[] makeDexElements(ArrayList<File> files, File optimizedDirectory,
                                             ArrayList<IOException> suppressedExceptions) {
  }
}

A n d r o i d   4.4 W   ( K i t K a t W a t c h   A P I   20 ) \rm Android \ 4.4W \ ( KitKat Watch \ API \ 20 )Android 4.4W (KitKatWatch API 20) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String libraryPath, File optimizedDirectory) {
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions);
  }
    /**
     * 创建一个数组 ,  每个数组元素都是 dex 路径名称 .
     */
    private static Element[] makeDexElements(ArrayList<File> files, File optimizedDirectory,
                                             ArrayList<IOException> suppressedExceptions){
  }
}

A n d r o i d   5.0   ( L o l l i p o p   A P I   21 ) \rm Android \ 5.0 \ ( Lollipop \ API \ 21 )Android 5.0 (Lollipop API 21) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String libraryPath, File optimizedDirectory) {
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions);
  }
    /**
     * 创建一个数组 ,  每个数组元素都是 dex 路径名称 .
     */
    private static Element[] makeDexElements(ArrayList<File> files, File optimizedDirectory,
                                             ArrayList<IOException> suppressedExceptions){
  }
}

A n d r o i d   5.1   ( L o l l i p o p   A P I   22 ) \rm Android \ 5.1 \ ( Lollipop \ API \ 22 )Android 5.1 (Lollipop API 22) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String libraryPath, File optimizedDirectory) {
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions);
  }
    /**
     * 创建一个数组 ,  每个数组元素都是 dex 路径名称 .
     */
    private static Element[] makeDexElements(ArrayList<File> files, File optimizedDirectory,
                                             ArrayList<IOException> suppressedExceptions){
  }
}

A n d r o i d   6.0   ( M a r s h m a l l o w   A P I   23 ) \rm Android \ 6.0 \ (Marshmallow \ API \ 23 )Android 6.0 (Marshmallow API 23) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String libraryPath, File optimizedDirectory) {
        // save dexPath for BaseDexClassLoader
        this.dexElements = makePathElements(splitDexPath(dexPath), optimizedDirectory,
                                            suppressedExceptions);
  }
    /**
     * 创建一个数组 ,  每个数组元素都是 dex 路径名称 .
     */
    private static Element[] makePathElements(List<File> files, File optimizedDirectory,
                                              List<IOException> suppressedExceptions) {
  }
}

A n d r o i d   7.0   ( N o u g a t   A P I   24 ) \rm Android \ 7.0 \ ( Nougat \ API \ 24 )Android 7.0 (Nougat API 24) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String librarySearchPath, File optimizedDirectory) {
        // save dexPath for BaseDexClassLoader
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions, definingContext);
  }
    private static Element[] makeDexElements(List<File> files, File optimizedDirectory,
                                             List<IOException> suppressedExceptions,
                                             ClassLoader loader) {
  }
    /**
     * Makes an array of directory/zip path elements, one per element of the given array.
     */
    private static Element[] makePathElements(List<File> files,
                                              List<IOException> suppressedExceptions,
                                              ClassLoader loader) {
        return makeElements(files, null, suppressedExceptions, true, loader);
    }
    /*
     * TODO (dimitry): Revert after apps stops relying on the existence of this
     * method (see http://b/21957414 and http://b/26317852 for details)
     */
    private static Element[] makePathElements(List<File> files, File optimizedDirectory,
                                              List<IOException> suppressedExceptions) {
        return makeElements(files, optimizedDirectory, suppressedExceptions, false, null);
    }
}

A n d r o i d   7.1   ( N o u g a t   A P I   25 ) \rm Android \ 7.1 \ ( Nougat \ API \ 25 )Android 7.1 (Nougat API 25) 系统中创建 Element[] dexElements 的方法 :
/*package*/ final class DexPathList {
    private Element[] dexElements;
    public DexPathList(ClassLoader definingContext, String dexPath,
            String librarySearchPath, File optimizedDirectory) {
        // save dexPath for BaseDexClassLoader
        this.dexElements = makeDexElements(splitDexPath(dexPath), optimizedDirectory,
                                           suppressedExceptions, definingContext);
  }
    private static Element[] makeDexElements(List<File> files, File optimizedDirectory,
                                             List<IOException> suppressedExceptions,
                                             ClassLoader loader) {
  }
    /**
     * Makes an array of directory/zip path elements, one per element of the given array.
     */
    private static Element[] makePathElements(List<File> files,
                                              List<IOException> suppressedExceptions,
                                              ClassLoader loader) {
        return makeElements(files, null, suppressedExceptions, true, loader);
    }
    /*
     * TODO (dimitry): Revert after apps stops relying on the existence of this
     * method (see http://b/21957414 and http://b/26317852 for details)
     */
    private static Element[] makePathElements(List<File> files, File optimizedDirectory,
                                              List<IOException> suppressedExceptions) {
        return makeElements(files, optimizedDirectory, suppressedExceptions, false, null);
    }
}