1、方法一
system\vold\model\PublicVolume.cpp
if (!(mFusePid = fork())) {
if (getMountFlags() & MountFlags::kPrimary) {
if (execl(kFusePath, kFusePath,
“-u”, “1023”, // AID_MEDIA_RW
“-g”, “1023”, // AID_MEDIA_RW
“-U”, std::to_string(getMountUserId()).c_str(),
“-w”,
mRawPath.c_str(),
stableName.c_str(),
NULL)) {
PLOG(ERROR) << “Failed to exec”;
}
} else {
if (execl(kFusePath, kFusePath,
“-u”, “1023”, // AID_MEDIA_RW
“-g”, “1023”, // AID_MEDIA_RW
“-U”, std::to_string(getMountUserId()).c_str(),
“-w”, // 添加 写 权限就是这样
mRawPath.c_str(),
stableName.c_str(),
NULL)) {
PLOG(ERROR) << “Failed to exec”;
}
}
LOG(ERROR) << “FUSE exiting”;
_exit(1);
}
文件参考：
Android 9.0 SD卡写入权限问题
https://blog.csdn.net/qq_36467463/article/details/88691726
【Android笔记】Android 9.0 SD卡读写权限问题
https://www.jianshu.com/p/f1329c001fd9
Android 9.0中sdcard 的权限和挂载问题
https://blog.csdn.net/shift_wwx/article/details/85633801
安卓内外部存储完全解析 – 别再弄混了
https://www.jianshu.com/p/116025bf51f7
Android 获取外置SD卡
https://www.2cto.com/kf/201502/377175.html
【译】如何在 Android 5.0 上获取 SD卡 的读写权限
https://blog.csdn.net/I_wait_for_you/article/details/70240114
Android 5.1 修改第三方APP读写外置SD卡权限
https://blog.csdn.net/yhyqf/article/details/85317777
Android P 外置 SD 卡写入权限问题
https://blog.csdn.net/ch853199769/article/details/88052886