Modify version number

1. Where is the version number stored? Packages/apps/settings/src/COM/Android/settings/deviceinfosettings. setstringsummary ("build_number", build. display); therefore, this variable is derived from the DISPLAY variable in the build class in framworks/base/CORE/Java/Android/OS/build. public static final string display = getstring ("Ro. build. display. ID ") is assigned in the out/target/product/XXX/system/build. in prop, this field is responsible for Ro. build. display. id2. how is the version number generated? Build/tools/buildinfo. Sh "Ro. Build. display. ID = $ build_display_id" 3. Where is the variable build_display_id defined? Build/CORE/makefilebuild_display_id: = $ (build_id). $ (build_number) defines 4. Where is build_id/build_number defined? This file in build/CORE/version_defaults.mk defines platform_version/playform_sdk_version/platform_sdk_version/versions/default_app_target_sdk/build_id/build_numberbuild_number: = ENG. $ (user ). $ (shell date + % Y % m % d. % H % m % s). Therefore, you can directly modify the value here.