Android OTG U盘无法显示在系统文件管理的修改

文件：frameworks\base\services\core\java\com\android\server\StorageManagerService.java
函数：private void onVolumeCreatedLocked(VolumeInfo vol)

如下修改：

    private void onVolumeCreatedLocked(VolumeInfo vol) {......if (vol.type == VolumeInfo.TYPE_EMULATED) {......} else if (vol.type == VolumeInfo.TYPE_PUBLIC) {......// Adoptable public disks are visible to apps, since they meet// public API requirement of being in a stable location./**********************************************************************///if (vol.disk.isAdoptable()) {		//注释掉这个判断vol.mountFlags |= VolumeInfo.MOUNT_FLAG_VISIBLE;//}/**********************************************************************/......}

上面的修改，在U盘mount的时候会起作用：
文件：system/vold/model/PublicVolume.cpp
函数：status_t PublicVolume::doMount()

status_t PublicVolume::doMount() {// TODO: expand to support mounting other filesystemsreadMetadata();......setInternalPath(mRawPath);if (getMountFlags() & MountFlags::kVisible) {	//这里有判断，使用storage挂载路径setPath(StringPrintf("/storage/%s", stableName.c_str()));} else {setPath(mRawPath);}......if (!(getMountFlags() & MountFlags::kVisible)) {	//这里也有判断，会继续执行后面的创建用户空间文件系统// Not visible to apps, so no need to spin up FUSEreturn OK;}......return OK;
}