我想知道人们是否已经成功地在Android中创建/挂载加密的OBB (不透明二进制Blob)文件？这是这个question 1的后续：What is OBB(Opaque Binary Blob) in Android develop site?，按照我在那篇文章中的指示，我执行了以下命令(从ICS4.01基线开始，在Ubuntu10.10-32bit和Ubuntu12.4-64bit上都尝试过)：
代码语言：javascript复制sudo modprobe cryptoloop
sudo modprobe twofish
sudo modprobe vfat
./mkobb.sh -d /tmp/obb/ -kblahblah -o /tmp/out.obb -v
obbtool a -n com.test.blah -v 1 -s 997ff9b1516a6788 /tmp/out.obb # 997ff... is the salt from the mkobb step
obbtool i /temp/out.obb # verify the obb file
adb push /temp/out.obb /sdcard/从这里，我将out.obb文件复制到我手机上的/sdcard/。并使用以下代码进行挂载：
代码语言：javascript复制String obbFile = Environment.getExternalStorageDirectory() + "/out.obb";
mgr = (StorageManager) getSystemService(Context.STORAGE_SERVICE); // mgr is a member varible of my main activity
Log.i("OBB", "trying to mount : " + obbFile + " does it exist? " + new File(obbFile).exists());
if (mgr.mountObb(obbFile, "blahblah", new OnObbStateChangeListener(){
@Override
public void onObbStateChange(String path, int state) {
Log.i("OBB", String.format("onObbStateChange:Path [%s] State=%d", path, state));
if (state == OnObbStateChangeListener.ERROR_COULD_NOT_MOUNT){
Log.i("OBB", "THIS IS THE ERROR I GET");
}
}}))
{
Log.i("OBB", "Attempting to mount");
} else {
Log.i("OBB", "Mount failed"); // this isn't happening
}其最终结果是：
代码语言：javascript复制 E/MountService( 2004): Couldn't mount OBB file: -1
I/OBB (21219): onObbStateChange:Path [/mnt/sdcard/out.obb] State=21
I/OBB (21219): THIS IS THE ERROR I GET有人觉得这有什么问题吗？看起来应该行得通了！
注意:我确实有android.permission.WRITE_EXTERNAL_STORAGE，而且我还可以从以下位置获得预期信息：
代码语言：javascript复制ObbInfo info = ObbScanner.getObbInfo("/sdcard/out.obb"); // this returns expected info, so the file is there and able to be read.编辑:链接到Android-开发人员组问题here