由网友(只因那时年少丶)分享简介：当我检查了Android 2.3的文档，我发现了大约OBB（不透明的二进制数据）的存储部分的信息。When I checked the Android 2.3 doc, I found the information about OBB(Opaque Binary Blob) in Storage section....

当我检查了Android 2.3的文档，我发现了大约OBB（不透明的二进制数据）的存储部分的信息。

When I checked the Android 2.3 doc, I found the information about OBB(Opaque Binary Blob) in Storage section.

但我找不到OBB（不透明的二进制数据）在谷歌的任何信息。

But I can't find any information of OBB(Opaque Binary Blob) in Google.

您可以给我一个什么OBB（不透明的二进制数据）的信息或地址？

Can you give me a information or address about what Obb(Opaque Binary Blob) is?

推荐答案

OBB让你打包大文件，并将其存储在公共SD卡中，只有您的应用程序可以解密和使用它们的方式。建立AOSP在 mkobb .SH和 obbtool 允许你创建（在Linux上）OBB文件。

OBB lets you package up large files and store them on the public SDcard in a way that only your app can decrypt and use them. After building the AOSP the mkobb.sh and obbtool allow you to create (on Linux) OBB files.

设置之类的路径，权限和内核模块后，创造是basicly：

After setting up things like PATH, permissions and kernel modules, creating is basicly:

$ mkobb.sh -d /data/myfiles -k my_secret_key -o /data/data.obb
$ obbtool a -n com.example.myapp -v 1 -s seed_from_mkobb /data/data.obb

在这你可以存储data.obb的SD卡，只从你的应用程序访问文件使用 my_secret_key

After which you can store the data.obb on SDcard and only access the files from your app with use of the my_secret_key

storage = (StorageManager) getSystemService( STORAGE_SERVICE );
storage.mountObb( obbFilepath, "my_secret_key", myListener );
obbContentPath = storage.getMountedObbPath( obbFilepath );

虽然其他应用程序可以摧毁SD卡上的data.obb唯一的应用程序可以访问它们，就好像存储在应用程序中的内容是作为安全的私密性。

Although other apps can destroy the data.obb on SD card only the app can access them and the content is as secure as if stored in app private.

只有在API 9级及以上，并与WRITE_EXTERNAL_STORAG​​E从SD访问OBB文件。

Only on API level 9 and up and with the WRITE_EXTERNAL_STORAGE to access OBB files from SD.