一、购买设备

设备要购买可以刷机的，具体可以网上搜查

到货就被我拆了，所以没有到货时的照片

二、前期配置

先去下载可爱的adb，下载地址:https://developer.android.com/studio/releases/platform-tools?hl=ja-jp（上网请自行解决）

下载完之后请在环境变量里面的系统变量的Path里面添加你解压的SDK Platform的路径

然后在cmd里面输入fastboot help测试你是否完成配置

正常的话输出如下：

usage: fastboot [OPTION...] COMMAND...

flashing:
 update ZIP                 Flash all partitions from an update.zip package.
 flashall                   Flash all partitions from $ANDROID_PRODUCT_OUT.
                            On A/B devices, flashed slot is set as active.
                            Secondary images may be flashed to inactive slot.
 flash PARTITION [FILENAME] Flash given partition, using the image from
                            $ANDROID_PRODUCT_OUT if no filename is given.

basics:
 devices [-l]               List devices in bootloader (-l: with device paths).
 getvar NAME                Display given bootloader variable.
 reboot [bootloader]        Reboot device.

locking/unlocking:
 flashing lock|unlock       Lock/unlock partitions for flashing
 flashing lock_critical|unlock_critical
                            Lock/unlock 'critical' bootloader partitions.
 flashing get_unlock_ability
                            Check whether unlocking is allowed (1) or not(0).

advanced:
 erase PARTITION            Erase a flash partition.
 format[:FS_TYPE[:SIZE]] PARTITION
                            Format a flash partition.
 set_active SLOT            Set the active slot.
 oem [COMMAND...]           Execute OEM-specific command.
 gsi wipe|disable           Wipe or disable a GSI installation (fastbootd only).
 wipe-super [SUPER_EMPTY]   Wipe the super partition. This will reset it to
                            contain an empty set of default dynamic partitions.
 create-logical-partition NAME SIZE
                            Create a logical partition with the given name and
                            size, in the super partition.
 delete-logical-partition NAME
                            Delete a logical partition with the given name.
 resize-logical-partition NAME SIZE
                            Change the size of the named logical partition.
 snapshot-update cancel     On devices that support snapshot-based updates, cancel
                            an in-progress update. This may make the device
                            unbootable until it is reflashed.
 snapshot-update merge      On devices that support snapshot-based updates, finish
                            an in-progress update if it is in the "merging"
                            phase.
 fetch PARTITION OUT_FILE   Fetch a partition image from the device.
boot image:
 boot KERNEL [RAMDISK [SECOND]]
                            Download and boot kernel from RAM.
 flash:raw PARTITION KERNEL [RAMDISK [SECOND]]
                            Create boot image and flash it.
 --dtb DTB                  Specify path to DTB for boot image header version 2.
 --cmdline CMDLINE          Override kernel command line.
 --base ADDRESS             Set kernel base address (default: 0x10000000).
 --kernel-offset            Set kernel offset (default: 0x00008000).
 --ramdisk-offset           Set ramdisk offset (default: 0x01000000).
 --tags-offset              Set tags offset (default: 0x00000100).
 --dtb-offset               Set dtb offset (default: 0x01100000).
 --page-size BYTES          Set flash page size (default: 2048).
 --header-version VERSION   Set boot image header version.
 --os-version MAJOR[.MINOR[.PATCH]]
                            Set boot image OS version (default: 0.0.0).
 --os-patch-level YYYY-MM-DD
                            Set boot image OS security patch level.

Android Things:
 stage IN_FILE              Sends given file to stage for the next command.
 get_staged OUT_FILE        Writes data staged by the last command to a file.

options:
 -w                         Wipe userdata.
 -s SERIAL                  Specify a USB device.
 -s tcp|udp:HOST[:PORT]     Specify a network device.
 -S SIZE[K|M|G]             Break into sparse files no larger than SIZE.
 --force                    Force a flash operation that may be unsafe.
 --slot SLOT                Use SLOT; 'all' for both slots, 'other' for
                            non-current slot (default: current active slot).
 --set-active[=SLOT]        Sets the active slot before rebooting.
 --skip-secondary           Don't flash secondary slots in flashall/update.
 --skip-reboot              Don't reboot device after flashing.
 --disable-verity           Sets disable-verity when flashing vbmeta.
 --disable-verification     Sets disable-verification when flashing vbmeta.
 --fs-options=OPTION[,OPTION]
                            Enable filesystem features. OPTION supports casefold, projid, compress
 --unbuffered               Don't buffer input or output.
 --verbose, -v              Verbose output.
 --version                  Display version.
 --help, -h                 Show this message.

三、使用刷机包刷机

准备：请事先打开你的设备管理器以查看是否刷入

刷机包下载链接：https://1drv.ms/u/s!Amlz-GTU12C-bk6H2LEupksz3yI?e=4UP0lT

下载完之后，先打开base文件夹下的flash.bat/flash.sh，然后打开debian文件夹下的flash.bat/flash.sh进行刷机

第四步:驱动问题

我重启后遇到了只认 adb 却认不出 rndis 的情况，这时候可以在设备管理器中右键-属性-驱动程序(顶部选项卡)-更新驱动程序-浏览我的电脑以查找驱动程序-让我从计算机上可用驱动程序列表中选取，选择 USB Composite Device (Windows 7 下为“Android Composite USB Device”)

搞定之后直接拔掉随身WIFI然后重插一遍就可以看到 RNDIS 了

第五步:安装RNDIS驱动