前置條件:
1 android nexue 5 手機一部
2 android L最新rom包
android L rom下載地址
https://developers.google.com/fit/preview#flash_your_nexus_5_or_nexus_7
過程：
下載完成後解壓縮，這個包需要使用 fastboot工具，不是原來的zip卡刷包，好在裏面的腳本文件
都已經寫好了，如下圖：
連接好手機和電腦，筆者是在ubuntu下的進行刷機，以下是刷機過程
nexus 5 手機需要進入到fastboot的模式，進入方式 按下開機鍵+音量上下鍵（也就是要按下音量鍵中間的部分）
在手機的 fastboot模式，執行下面的命令
root@ubuntu:~/Desktop/hammerhead-lpv81c# ls bootloader-hammerhead-hhz11k.img flash-base.sh flash-all.bat p_w_picpath-hammerhead-lpv81c.zip flash-all.sh radio-hammerhead-m8974a-2.0.50.2.08.img root@ubuntu:~/Desktop/hammerhead-lpv81c# ./flash-all.sh sending 'bootloader' (2508 KB)... OKAY [ 0.543s] writing 'bootloader'... OKAY [ 0.494s] finished. total time: 1.037s rebooting into bootloader... OKAY [ 0.040s] finished. total time: 0.040s sending 'radio' (45505 KB)... OKAY [ 6.213s] writing 'radio'... OKAY [ 3.118s] finished. total time: 9.332s rebooting into bootloader... OKAY [ 0.044s] finished. total time: 0.044s archive does not contain 'boot.sig' archive does not contain 'recovery.sig' archive does not contain 'system.sig' -------------------------------------------- Bootloader Version...: HHZ11k Baseband Version.....: M8974A-2.0.50.2.08 Serial Number........: 06ea489d00e2a439 -------------------------------------------- checking product... OKAY [ 0.101s] checking version-bootloader... OKAY [ 0.099s] checking version-baseband... OKAY [ 0.100s] sending 'boot' (8754 KB)... OKAY [ 1.420s] writing 'boot'... OKAY [ 0.754s] sending 'recovery' (9412 KB)... OKAY [ 1.516s] writing 'recovery'... OKAY [ 0.791s] erasing 'system'... OKAY [ 0.969s] sending 'system' (682924 KB)... OKAY [103.092s] writing 'system'... OKAY [ 46.568s] erasing 'userdata'... OKAY [ 8.677s] formatting 'userdata' partition... Creating filesystem with parameters: Size: 13725835264 Block size: 4096 Blocks per group: 32768 Inodes per group: 8144 Inode size: 256 Journal blocks: 32768 Label: Blocks: 3351034 Block groups: 103 Reserved block group size: 823 Created filesystem with 11/838832 inodes and 93654/3351034 blocks sending 'userdata' (137318 KB)... writing 'userdata'... OKAY [ 38.505s] erasing 'cache'... OKAY [ 0.613s] formatting 'cache' partition... Creating filesystem with parameters: Size: 734003200 Block size: 4096 Blocks per group: 32768 Inodes per group: 7472 Inode size: 256 Journal blocks: 2800 Label: Blocks: 179200 Block groups: 6 Reserved block group size: 47 Created filesystem with 11/44832 inodes and 5813/179200 blocks sending 'cache' (13348 KB)... writing 'cache'... OKAY [ 3.278s] rebooting... finished. total time: 207.000s root@ubuntu:~/Desktop/hammerhead-lpv81c#
注意：fastboot刷機界面很不友好，比如
fastboot -w update p_w_picpath-hammerhead-lpv81c.zip
這個命令執行過程，沒有任何提示，並且時間很長，如果是初次刷機，有可能認爲是刷機失敗了
需要耐心等待一會兒
開機體驗：
android L第一次開機速度奇慢，開機動畫出現以後，等了大概5分鐘，讓筆者甚至懷疑是不是刷錯
rom包了。在最後要放棄的時間，纔出現了配置界面，發現rom包沒有問題，估計是art模式轉換的
時間太長了，但是好歹做個進度條提示，光一個開機動畫轉啊轉，實在是讓人很難忍受。