Android为我们提供了一个常量类Build,其中最主要是Build中的两个内部类VERSION和VERSION_CODES
VERSION表示当前系统版本的信息,其中就包括SDK的版本信息,用于成员SDK_INT表示;
对于VERSION_CODES在SDK开发文档中时这样描述的,Enumeration of the currently known SDK version codes. These are the values that can be found in SDK
. Version numbers increment monotonically with each official platform release.
在我们自己开发应用过程中,常常使用如下的代码形式判断运行新API还是旧的API:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
{
// 包含新API的代码块
}
else
{
// 包含旧的API的代码块
}
以下为版本号:
int | BASE | October 2008: The original, first, version of Android. | |||||||||
int | BASE_1_1 | February 2009: First Android update, officially called 1.1. | |||||||||
int | CUPCAKE | May 2009: Android 1.5. | |||||||||
int | CUR_DEVELOPMENT | Magic version number for a current development build, which has not yet turned into an official release. | |||||||||
int | DONUT | September 2009: Android 1.6. | |||||||||
int | ECLAIR | November 2009: Android 2.0 Applications targeting this or a later release will get these new changes in behavior:
| |||||||||
int | ECLAIR_0_1 | December 2009: Android 2.0.1 | |||||||||
int | ECLAIR_MR1 | January 2010: Android 2.1 | |||||||||
int | FROYO | June 2010: Android 2.2 | |||||||||
int | GINGERBREAD | November 2010: Android 2.3 Applications targeting this or a later release will get these new changes in behavior:
| |||||||||
int | GINGERBREAD_MR1 | February 2011: Android 2.3.3. | |||||||||
int | HONEYCOMB | February 2011: Android 3.0. | |||||||||
int | HONEYCOMB_MR1 | May 2011: Android 3.1. | |||||||||
int | HONEYCOMB_MR2 | June 2011: Android 3.2. | |||||||||
int | ICE_CREAM_SANDWICH | October 2011: Android 4.0. | |||||||||
int | ICE_CREAM_SANDWICH_MR1 | December 2011: Android 4.0.3. | |||||||||
int | JELLY_BEAN | June 2012: Android 4.1. | |||||||||
int | JELLY_BEAN_MR1 | Android 4.2: Moar jelly beans! Applications targeting this or a later release will get these new changes in behavior:
|