開機引導模式下使用。此文說明主要适用android 6.0及以上版本

下載以下幾個文件，CMD命令窗口切換到此目錄就可使用了，當然還要安裝USB驅動、打開USB調試（可選）：

adb工具

怎麼進入此模式：

• 手機端：電源鍵 音量減/加
• 電腦端：用ADB工具，命令：adb reboot bootloader

格式: fastboot [OPTION...] COMMAND...

版本：與1.0.41版的adb适應

flashing: 寫入命令

update ZIP : Flash all partitions from an update.zip package. 如fastboot update xxx.zip , xxx.zip中包含boot.img, recovery.img, system.img等鏡像文件

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. 會自動搜索當前目錄下的所有img文件，将它們都刷入系統對應分區。

flash PARTITION [FILENAME] : Flash given partition, using the image from $ANDROID_PRODUCT_OUT if no filename is given. 這裡的PARTITION有boot/recovery/system/userdata/cache等

fastboot flash boot boot.img 将當前目錄下的boot.img文件刷進系統的boot分區 fastboot flash recovery recovery.img 将當前目錄下的recovery.img文件刷進系統的recovery分區 例子： c:\tmp\fastboot>fastboot flash boot C:\tmp\F103_BAK\boot20220118.img Sending 'boot' (16384 KB) OKAY [ 1.583s] Writing 'boot' OKAY [ 0.355s] Finished. Total time: 2.011s c:\tmp\fastboot>fastboot flash recovery C:\tmp\F103_BAK\recovery20220118.img Sending 'recovery' (16384 KB) OKAY [ 1.584s] Writing 'recovery' OKAY [ 0.354s] Finished. Total time: 2.001s

basics:

devices [-l] : List devices in bootloader (-l: with device paths).

c:\tmp\fastboot>fastboot devices 000007CF00632D90 fastboot 顯示以fastboot結尾的設備号 c:\adb\adb32>adb devices * daemon not running. starting it now on port 5037 * * daemon started successfully * List of devices attached 8T8HBIZSBU9PCM4S device adb時顯示以device結尾

getvar NAME : Display given bootloader variable.

reboot [bootloader] : Reboot device.

fastboot reboot 重新啟動到正常模式 fastboot reboot bootloader 重新啟動到引導模式 fastboot reboot recovery 重新啟動到恢複模式 例子： c:\tmp\fastboot>fastboot reboot bootloader android 5.0及以上可用此命令 Rebooting into bootloader OKAY [ 0.003s] Finished. Total time: 0.007s c:\tmp\fastboot>fastboot reboot Rebooting OKAY [ 0.002s] Finished. Total time: 0.006s

locking/unlocking:上鎖/解鎖命令，将會删除個人數據

flashing lock|unlock : Lock/unlock partitions for flashing

fastboot flashing lock 給BL上鎖 fastboot flashing unlock 解BL鎖

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. 這裡的command主要是自定義的命令（慎用）。高版本的系統可用fastboot oem help 查詢有效的命令。

android 6.0以前： fastboot oem lock 上BL鎖 fastboot oem unlock 解BL鎖 c:\tmp\fastboot>fastboot oem unlock OKAY [ 30.582s] Finished. Total time: 30.591s 另一個手機的解鎖： c:\tmp\fastboot>fastboot oem unlock (bootloader) Start unlock flow OKAY [ 29.972s] Finished. Total time: 29.983s c:\tmp\fastboot>fastboot oem lock (bootloader) Start lock flow OKAY [ 43.440s] Finished. Total time: 43.449s C:\tmp\fastboot-1>fastboot oem reboot-recovery 重啟到recovery模式 OKAY [ 0.003s] Finished. Total time: 0.050s 還有：fastboot oem reboot-bootloader

查詢設備BL上鎖情況： fastboot oem get_bootinfo 此處的get_bootinfo是用戶自定義命令 C:\tmp\fastboot>fastboot oem device-info (bootloader) Verity mode: true (bootloader) Device unlocked: false (bootloader) Device critical unlocked: false (bootloader) Charger screen enabled: true OKAY [ 0.013s] Finished. Total time: 0.018s

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.

boot image: 用指定鏡像文件臨時啟動系統，不會更改原系統的啟動文件，如利用magisk加入root權限的boot文件啟動

boot KERNEL [RAMDISK [SECOND]] : Download and boot kernel from RAM.

用magisk_patched-23000_EJX2G.img（加了面具的boot.img）啟動手機例子： C:\tmp\fastboot>fastboot boot C:\tmp\fastboot\magisk_patched-23000_EJX2G.img Sending 'boot.img' (16384 KB) OKAY [ 1.573s] Booting OKAY [ 0.060s] Finished. Total time: 1.678s

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: 選項參數

-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.

--unbuffered : Don't buffer input or output.

--verbose, -v : Verbose output.

--version : Display version.

--help, -h : Show this message.