如何查看Android SDK源码版本

本文目录

• 如何查看Android SDK源码版本
• 如何查看android sdk版本
• 安卓开发一般选用哪个版本sdk
• 现在 android 开发 SDK一般选择哪个版本
• Android 应用开发一般都哪个版本的 SDK
• Android 开发使用的 SDK 现在推荐使用哪个版本开发
• Android开发环境搭建：jdk版本为1.7，sdk 版本选择哪个合适
• 如何选择 android sdk版本
• 如何修改Android项目运行时需要的SDK版本

如何查看Android SDK源码版本

PLATFORM_VERSION := 4.2.2
位于/build/core/version_defaults.mk
#
# Copyright (C) 2008 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the “License“);
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an “AS IS“ BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Handle various build version information.
#
# Guarantees that the following are defined:
# PLATFORM_VERSION
# PLATFORM_SDK_VERSION
# PLATFORM_VERSION_CODENAME
# DEFAULT_APP_TARGET_SDK
# BUILD_ID
# BUILD_NUMBER
#
# Look for an optional file containing overrides of the defaults,
# but don’t cry if we don’t find it. We could just use -include, but
# the build.prop target also wants INTERNAL_BUILD_ID_MAKEFILE to be set
# if the file exists.
#
INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk)
ifneq ““ “$(INTERNAL_BUILD_ID_MAKEFILE)“
include $(INTERNAL_BUILD_ID_MAKEFILE)
endif
ifeq ““ “$(PLATFORM_VERSION)“
# 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.
PLATFORM_VERSION := 4.2.2 # SDK Version
endif
ifeq ““ “$(PLATFORM_SDK_VERSION)“
# This is the canonical definition of the SDK version, which defines
# the set of APIs and functionality available in the platform. It
# is a single integer that increases monotonically as updates to
# the SDK are released. It should only be incremented when the APIs for
# the new release are frozen (so that developers don’t write apps against
# intermediate builds). During development, this number remains at the
# SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
# the code-name of the new development work.
PLATFORM_SDK_VERSION := 17 #API Level
endif
ifeq ““ “$(PLATFORM_VERSION_CODENAME)“
# This is the current development code-name, if the build is not a final
# release build. If this is a final release build, it is simply “REL“.
PLATFORM_VERSION_CODENAME := REL
endif
ifeq ““ “$(DEFAULT_APP_TARGET_SDK)“
# This is the default minSdkVersion and targetSdkVersion to use for
# all .apks created by the build system. It can be overridden by explicitly
# setting these in the .apk’s AndroidManifest.xml. It is either the code
# name of the development build or, if this is a release build, the official
# SDK version of this release.
ifeq “REL“ “$(PLATFORM_VERSION_CODENAME)“
DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
else
DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
endif
endif
ifeq ““ “$(BUILD_ID)“
# Used to signify special builds. E.g., branches and/or releases,
# like “M5-RC7“. Can be an arbitrary string, but must be a single
# word and a valid file name.
#
# If there is no BUILD_ID set, make it obvious.
BUILD_ID := UNKNOWN
endif
ifeq ““ “$(BUILD_NUMBER)“
# BUILD_NUMBER should be set to the source control value that
# represents the current state of the source code. E.g., a
# perforce changelist number or a git hash. Can be an arbitrary string
# (to allow for source control that uses something other than numbers),
# but must be a single word and a valid file name.
#
# If no BUILD_NUMBER is set, create a useful “I am an engineering build
# from this date/time“ value. Make it start with a non-digit so that
# anyone trying to parse it as an integer will probably get “0“.
BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)
endif
root@idong:/home/hejian/rk3066-4.2/build/core#
root@idong:/home/hejian/rk3066-4.2/build/core# cat version_defaults.mk
#
# Copyright (C) 2008 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the “License“);
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an “AS IS“ BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Handle various build version information.
#
# Guarantees that the following are defined:
# PLATFORM_VERSION
# PLATFORM_SDK_VERSION
# PLATFORM_VERSION_CODENAME
# DEFAULT_APP_TARGET_SDK
# BUILD_ID
# BUILD_NUMBER
#
# Look for an optional file containing overrides of the defaults,
# but don’t cry if we don’t find it. We could just use -include, but
# the build.prop target also wants INTERNAL_BUILD_ID_MAKEFILE to be set
# if the file exists.
#
INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk)
ifneq ““ “$(INTERNAL_BUILD_ID_MAKEFILE)“
include $(INTERNAL_BUILD_ID_MAKEFILE)
endif
ifeq ““ “$(PLATFORM_VERSION)“
# 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.
PLATFORM_VERSION := 4.2.2
endif
ifeq ““ “$(PLATFORM_SDK_VERSION)“
# This is the canonical definition of the SDK version, which defines
# the set of APIs and functionality available in the platform. It
# is a single integer that increases monotonically as updates to
# the SDK are released. It should only be incremented when the APIs for
# the new release are frozen (so that developers don’t write apps against
# intermediate builds). During development, this number remains at the
# SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
# the code-name of the new development work.
PLATFORM_SDK_VERSION := 17
endif
ifeq ““ “$(PLATFORM_VERSION_CODENAME)“
# This is the current development code-name, if the build is not a final
# release build. If this is a final release build, it is simply “REL“.
PLATFORM_VERSION_CODENAME := REL
endif
ifeq ““ “$(DEFAULT_APP_TARGET_SDK)“
# This is the default minSdkVersion and targetSdkVersion to use for
# all .apks created by the build system. It can be overridden by explicitly
# setting these in the .apk’s AndroidManifest.xml. It is either the code
# name of the development build or, if this is a release build, the official
# SDK version of this release.
ifeq “REL“ “$(PLATFORM_VERSION_CODENAME)“
DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
else
DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
endif
endif
ifeq ““ “$(BUILD_ID)“
# Used to signify special builds. E.g., branches and/or releases,
# like “M5-RC7“. Can be an arbitrary string, but must be a single
# word and a valid file name.
#
# If there is no BUILD_ID set, make it obvious.
BUILD_ID := UNKNOWN
endif
ifeq ““ “$(BUILD_NUMBER)“
# BUILD_NUMBER should be set to the source control value that
# represents the current state of the source code. E.g., a
# perforce changelist number or a git hash. Can be an arbitrary string
# (to allow for source control that uses something other than numbers),
# but must be a single word and a valid file name.
#
# If no BUILD_NUMBER is set, create a useful “I am an engineering build
# from this date/time“ value. Make it start with a non-digit so that
# anyone trying to parse it as an integer will probably get “0“.
BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)
endif

如何查看android sdk版本

1、点击进入已经下载好的sdk的路径位置中。

2、通过android studio菜单栏中也可以进入。

3、在sdk manager的应用程序，然后双击启动该应用。

4、点击菜单中tools的选项。

5、弹出了下拉菜单，点击about选项。

6、然后就会弹出了android sdk manager about的窗口，可以在窗口看到是revision 25.0.6的版本。

扩展资料

软件工具开发包通常包含许可证，这些许可证使它们不适合构建旨在根据不兼容许可证开发的软件。专有SDK通常与自由软件开发不兼容，而GPL许可的SDK可能与专有软件开发不兼容，所有这些都特别是出于法律原因。

但是，根据GNU宽通用公共许可证（LGPL）构建的SDK通常对于专有开发是安全的。平均Android移动应用程序实现了15.6个独立的SDK，游戏应用程序平均实现了17.5种不同的SDK。

Android移动应用最受欢迎的SDK类别是分析和广告 。SDK可能不安全（因为它们在应用程序中实现，但运行单独的代码）。

恶意SDK（无论是否有诚意）可能会侵犯用户的数据隐私，损害应用性能，甚至导致应用被禁止使用Google Play或iTunes。新技术允许应用程序开发人员实时控制和监控客户端SDK。

参考资料：百度百科-Android SDK

参考资料：百度百科-软件开发工具包

安卓开发一般选用哪个版本sdk

现在
android
开发
SDK一般选择用最新的SDK版本,这是Google官方强烈建议的。
　　app能运行的Android版本不是由SDK决定的，是由每一个项目的minSDK决定的。SDK都是向下兼容的。SDK在不断改进中，新的SDK会提供更强大开发工具，而且用4.0的SDK编译的2.1的apk的执行效率会比用2.1的SDK编译的更高。
　　至于每个app应该用什么
minSDK
，应该根据应用具体的API来，如果app没有用到1.6以上SDK新提供的API，那么用1.6会在提供相同体验下反而会比2.1兼容更多机型.

现在 android 开发 SDK一般选择哪个版本

　　现在 android 开发 SDK一般选择用最新的SDK版本,这是Google官方强烈建议的。
　　app能运行的Android版本不是由SDK决定的，是由每一个项目的minSDK决定的。SDK都是向下兼容的。SDK在不断改进中，新的SDK会提供更强大开发工具，而且用4.0的SDK编译的2.1的apk的执行效率会比用2.1的SDK编译的更高。
　　至于每个app应该用什么 minSDK ，应该根据应用具体的API来，如果app没有用到1.6以上SDK新提供的API，那么用1.6会在提供相同体验下反而会比2.1兼容更多机型.

Android 应用开发一般都哪个版本的 SDK

永远只用最新的SDK版本,这是Google官方强烈建议的。自己的app能运行的Android版本不是由SDK决定的，是由每一个项目的minSDK决定的。SDK都是向下兼容的。SDK在不断改进中，新的SDK会提供更强大开发工具，而且用4.0的SDK编译的2.1的apk的执行效率会比用2.1的SDK编译的更高。
至于每个app应该用什么 minSDK ，应该根据应用具体的API来，如果app没有用到1.6以上SDK新提供的API，那么用1.6会在提供相同体验下反而会比2.1兼容更多机型.

Android 开发使用的 SDK 现在推荐使用哪个版本开发

target SDK 可以选择5.0版本，有诸如NavigationView、ToolBar等目前流行控件，关键的是网上也有丰富的资源，而且大部分安卓手机版本也有5.0

Android开发环境搭建：jdk版本为1.7，sdk 版本选择哪个合适

现在android开发，都是使用android studio这个官方提供的IDE，它有自带的jdk的，目前官方默认自带的jdk版本是1.7的，存储在你的android studio安装目录下的jre目录，你可以在android studio操作界面 File--》Project Structure 打开操作界面，SDK Location就能看到JDK location了，也可以在这里进行修改。
其实使用jdk1.7 和1.8的区别，仅仅在于你的java代码编写方面，1.8的版本，支持一些更简洁的语法表达式，从某种意义上来说，这只是程序语言的进化而已。就好比最早的程序，使用10101010，但实现一个功能，可能需要写N多的101010，于是出了编程语言，比如C，C++，用几行英文单词来释义，就大大减少了工作量，然后在c++的基础上，诞生了java，剔除了繁杂的指针问题，再到现在主流的python，以前c++,java代码10行才能实现的功能，python可能只需要1-2行代码就可以实现了，这就是编程语言的进化
对应的sdk版本，sdk，其实指的是android操作系统的版本，从最早的1.0beta版本到现在的9.0版本，有相当多的变化，目前市面上90%以上的android手机，操作系统都在4.x以上，也就是说，你的程序支持最低的版本，在API 16以上，即可以兼容几乎所有的手机，而target版本，设定在API 25,26即可，最新的API 28,对应的操作系统也就是android9.0，目前还在测试阶段，2018-07-02发布的，不建议把target设置为最新版本

如何选择 android sdk版本

　　android sdk版本是根据要编程适配的安卓版本型号来决定的，现在市场主流是安卓4，可以选择安卓4.0版本的sdk。
　　
　　SDK：（software development kit）软件开发工具包。被软件开发工程师用于为特定的软件包、软件框架、硬件平台、操作系统等建立应用软件的开发工具的集合。因此，Android SDK 指的是Android专属的软件开发工具包。

如何修改Android项目运行时需要的SDK版本

工具/原料：

adt-bundle-windows-x86_64-20140702

方法/步骤：

一、打开工程，如“HelloJni”

二、右键工程-》弹出的菜单-》选择 Properties；

三、

1、选择 Android；

2、选中期望设置成的android sdk版本；

3、点击回车；

四、最后的效果图，android的sdk版本已经变成了2.3.3了