android版本判断

if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.ICE_CREAM_SANDWICH){}
Build.VERSION_CODES类下面的版本信息

static int BASE //October 2008: The original, first, version of Android. 
static int BASE_1_1 //February 2009: First Android update, officially called 1.1. 
static int CUPCAKE //May 2009: Android 1.5. 
static int CUR_DEVELOPMENT //Magic version number for a current development build, which has not yet turned into an official release. 
static int DONUT //September 2009: Android 1.6. 
static int ECLAIR //November 2009: Android 2.0 
static int ECLAIR_0_1 //December 2009: Android 2.0.1 
static int ECLAIR_MR1 //January 2010: Android 2.1 
static int FROYO June //2010: Android 2.2 
static int GINGERBREAD //November 2010: Android 2.3 
static int GINGERBREAD_MR1 //February 2011: Android 2.3.3. 
static int HONEYCOMB //February 2011: Android 3.0. 
static int HONEYCOMB_MR1 //May 2011: Android 3.1. 
static int HONEYCOMB_MR2 //June 2011: Android 3.2. 
static int ICE_CREAM_SANDWICH //October 2011: Android 4.0. 
static int ICE_CREAM_SANDWICH_MR1 //December 2011: Android 4.0.3. 
static int JELLY_BEAN //June 2012: Android 4.1. 
static int JELLY_BEAN_MR1 //Android 4.2: Moar jelly beans!