安卓android的結(jié)構(gòu)-資料下載頁
2025-10-25 01:44本頁面
【導(dǎo)讀】虛擬機之上，就是JAVA的核心庫。根據(jù)Android的軟件框圖，其軟件層次結(jié)構(gòu)自下而上分為以下幾個層次：。Android對操作系統(tǒng)的使用包括核心和驅(qū)動程序兩部分，Android的Linux核心為標準的內(nèi)。核，Android更多的是需要一些與移動設(shè)備相關(guān)的驅(qū)動程序。本層次對應(yīng)一般嵌入式系統(tǒng)，相當(dāng)于中間件層次。一個是Android運行環(huán)境。備的平臺的應(yīng)用密切相關(guān)。在執(zhí)行的過程中，每一個應(yīng)用程序即一個進程。二者最大的區(qū)別在于Java. Android的應(yīng)用程序框架為應(yīng)用程序?qū)拥拈_發(fā)者提供APIs，它實際上是一個應(yīng)用程序的框架。Android的應(yīng)用程序主要是用戶界面方面的，通常以JAVA程序編寫，其中還可以。這也是Android開源的巨大潛。Android利用Recovery模式，進行恢復(fù)出廠設(shè)置，OTA升級，patch升級及firmware升級。
【正文】 nature file: ] digestEntry(): [ get SHA1 digest of file ] RSA_verify(public key:, signature:, 39。s digest):libc/ [ Verify a 2048 bit RSA signature against an expected SHA1 hash. Use public key to decrypt the to get original SHA digest, then pare to digest of ] verifyManifest() [ Get manifest SHA1Digest from . Then do digest to . Compare them ] verifyArchive() [ verify all the files in with digest listed in ] find_update_script(): [ find METAINF//google/android/updatescript updater script ] handle_update_script(): [ read cmds from script file, and do parser, exec ] parseAmendScript(): [ call yyparse() to parse to mand ] exeCommandList(): exeCommand(): [ call mand hook function ] erase DATA/CACHE partition prompt_and_wait(): [ wait for user input: 1) reboot 2) 3) wipe data ] ui_key_xxx get ALT+x keys 1) do nothing 2) install_package(39。SDCARD:39。) 3) erase_root() → format_root_device() DATA/CACHE may_install_firmware_update(): [ remember_firmware_update() is called by write_hboot/radio_image mand, it stores the bootloader image to CACHE partition, and write updatehboot/radio mand to MISC partition for bootloader message to let bootloader update itself after reboot ] set_bootloader_message() write_update_for_bootloader(): [ write firmware image into CACHE partition with update_header, busyimage and failimage ] finish_recovery(): [ clear the recovery mand and prepare to boot a (hopefully working) system, copy our log file to cache as well (for the system to read), and record any intent we were asked to municate back to the system. ] reboot() ............................... ................................主系統(tǒng)文件 機器 啟動后的主要系統(tǒng)全部在這里！ 定義 ROM就是這里的事兒 .............................. 相關(guān)刷機工具下載 （未完待續(xù) ....................中場休息 ....................） ( KB) ( KB) ( KB)
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