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应用文件访问(C/C++)

场景介绍

FileIO模块提供了部分文件基础操作能力,其他能力请参考libc标准库/c++标准库

约束限制

进行文件操作之前,必须保证传入正确有效的URI或path。

接口说明

接口的详细说明,请参考FileIO

接口名称描述
FileManagement_ErrCode OH_FileIO_GetFileLocation(char *uri, int uriLength, FileIO_FileLocation *location)获取文件存储位置。
enum FileIO_FileLocation FileIO_FileLocation文件存储位置枚举值。
enum FileManagement_ErrCode FileManagement_ErrCode文件管理模块错误码。

开发步骤

在CMake脚本中链接动态库

CMakeLists.txt中添加以下lib。

target_link_libraries(sample PUBLIC libohfileio.so)

添加头文件

#include <cstdio>
#include <cstring>
#include <filemanagement/fileio/oh_fileio.h>

调用OH_FileIO_GetFileLocation接口获取文件存储位置。示例代码如下所示:

void GetFileLocationExample(char *uri)
{
FileIO_FileLocation location;
FileManagement_ErrCode ret = OH_FileIO_GetFileLocation(uri, strlen(uri), &location);
if (ret == 0) {
if (location == FileIO_FileLocation::LOCAL) {
printf("Succeeded in getting file location, this file is on local.");
} else if (location == FileIO_FileLocation::CLOUD) {
printf("Succeeded in getting file location, this file is on cloud.");
} else if (location == FileIO_FileLocation::LOCAL_AND_CLOUD) {
printf("Succeeded in getting file location, this file is on local and cloud.");
}
} else {
printf("Failed to get file location, error code is %d", ret);
}
}