android 系统中修改系统的版本号

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android 系统中修改系统的版本号

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最近在做android 9.0的项目，发现在setting==》About==》status==>Version 中显示的Android 系统的版本号为9,看着很别扭。于是想要修改为9.0.0。

下面一步一步从setting app 里面找具体版本号最终是在哪设置的。

1.packages\apps\Settings\src\com\android\tv\settings\about\AboutFragment.java

@Override public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { setPreferencesFromResource(R.xml.device_info_settings, null); final PreferenceScreen screen = getPreferenceScreen(); refreshDeviceName(); final Preference deviceNamePref = findPreference(KEY_DEVICE_NAME); PreferenceUtils.resolveSystemActivityOrRemove(getActivity(), screen, deviceNamePref, 0); final Preference firmwareVersionPref = findPreference(KEY_FIRMWARE_VERSION); firmwareVersionPref.setSummary(Build.VERSION.RELEASE); //从此处设置 firmwareVersionPref.setEnabled(true);

2.frameworks\base\core\java\android\os\Build.java

/** Various version strings. */ public static class VERSION { /** * The internal value used by the underlying source control to * represent this build. E.g., a perforce changelist number * or a git hash. */ public static final String INCREMENTAL = getString("ro.build.version.incremental"); /** * The user-visible version string. E.g., "1.0" or "3.4b5". */ public static final String RELEASE = getString("ro.build.version.release"); //此处调用设置 /** * The base OS build the product is based on. * */ public static final String BASE_OS = SystemProperties.get("ro.build.version.base_os", ""); /** * The user-visible security patch level. */ public static final String SECURITY_PATCH = SystemProperties.get( "ro.build.version.security_patch", ""); private static String getString(String property) { return SystemProperties.get(property, UNKNOWN); //而getstring是通过get properties 得到的。 }

接下来就要找从哪里set的 ro.build.version.release属性

build/make/tools/buildinfo.sh

echo "# begin build properties" echo "# autogenerated by buildinfo.sh" echo "ro.build.id=$BUILD_ID" echo "ro.build.display.id=$BUILD_DISPLAY_ID" echo "ro.build.version.incremental=$BUILD_NUMBER" echo "ro.build.version.sdk=$PLATFORM_SDK_VERSION" echo "ro.build.version.preview_sdk=$PLATFORM_PREVIEW_SDK_VERSION" echo "ro.build.version.codename=$PLATFORM_VERSION_CODENAME" echo "ro.build.version.all_codenames=$PLATFORM_VERSION_ALL_CODENAMES" echo "ro.build.version.release=$PLATFORM_VERSION" // 这里设置 echo "ro.build.version.security_patch=$PLATFORM_SECURITY_PATCH" echo "ro.build.version.base_os=$PLATFORM_BASE_OS"

4. build / make/core/version_defaults.mk

DEFAULT_PLATFORM_VERSION := PPR1 MIN_PLATFORM_VERSION := PPR1 MAX_PLATFORM_VERSION := PPR1 ALLOWED_VERSIONS := $(call allowed-platform-versions,\ $(MIN_PLATFORM_VERSION),\ $(MAX_PLATFORM_VERSION),\ $(DEFAULT_PLATFORM_VERSION)) ifndef TARGET_PLATFORM_VERSION TARGET_PLATFORM_VERSION := $(DEFAULT_PLATFORM_VERSION) endif ifeq (,$(filter $(ALLOWED_VERSIONS), $(TARGET_PLATFORM_VERSION))) $(warning Invalid TARGET_PLATFORM_VERSION '$(TARGET_PLATFORM_VERSION)', must be one of) $(error $(ALLOWED_VERSIONS)) endif # Default versions for each TARGET_PLATFORM_VERSION # TODO: PLATFORM_VERSION, PLATFORM_SDK_VERSION, etc. should be conditional # on this # This is the canonical definition of the platform version, # which is the version that we reveal to the end user. # Update this value when the platform version changes (rather # than overriding it somewhere else). Can be an arbitrary string. # When you add a new PLATFORM_VERSION which will result in a new # PLATFORM_SDK_VERSION please ensure you add a corresponding isAtLeast* # method in the following java file: # frameworks/support/compat/gingerbread/android/support/v4/os/BuildCompat.java # When you change PLATFORM_VERSION for a given PLATFORM_SDK_VERSION # please add that PLATFORM_VERSION as well as clean up obsolete PLATFORM_VERSION's # in the following text file: # cts/tests/tests/os/assets/platform_versions.txt PLATFORM_VERSION.PPR1 := 9 // 找到，将此处修改为 9.0.0 即可到此就可以修改android 系统的版本号

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android 系统中修改系统的版本号

android 系统中修改系统的版本号

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