Android 各API版本代码常量

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Android开发中常常有版本比较这个功能，来做版本兼容或者，其他相关效果等
以下是Android 7.0版本下的源码：
 public static class VERSION_CODES {        /**         * Magic version number for a current development build, which has         * not yet turned into an official release.         */        public static final int CUR_DEVELOPMENT = 10000;                /**         * October 2008: The original, first, version of Android.  Yay!         */        public static final int BASE = 1;                /**         * February 2009: First Android update, officially called 1.1.         */        public static final int BASE_1_1 = 2;                /**         * May 2009: Android 1.5.         */        public static final int CUPCAKE = 3;                /**         * September 2009: Android 1.6.         */        public static final int DONUT = 4;                /**         * November 2009: Android 2.0         */        public static final int ECLAIR = 5;                /**         * December 2009: Android 2.0.1         */        public static final int ECLAIR_0_1 = 6;                /**         * January 2010: Android 2.1         */        public static final int ECLAIR_MR1 = 7;                /**         * June 2010: Android 2.2         */        public static final int FROYO = 8;                /**         * November 2010: Android 2.3         */        public static final int GINGERBREAD = 9;                /**         * February 2011: Android 2.3.3.         */        public static final int GINGERBREAD_MR1 = 10;        /**         * February 2011: Android 3.0.         */        public static final int HONEYCOMB = 11;                /**         * May 2011: Android 3.1.         */        public static final int HONEYCOMB_MR1 = 12;                /**         * June 2011: Android 3.2.         */        public static final int HONEYCOMB_MR2 = 13;        /**         * October 2011: Android 4.0.         */        public static final int ICE_CREAM_SANDWICH = 14;        /**         * December 2011: Android 4.0.3.         */        public static final int ICE_CREAM_SANDWICH_MR1 = 15;        /**         * June 2012: Android 4.1.         */        public static final int JELLY_BEAN = 16;        /**         * Android 4.2: Moar jelly beans!         */        public static final int JELLY_BEAN_MR1 = 17;        /**         * Android 4.3: Jelly Bean MR2, the revenge of the beans.         */        public static final int JELLY_BEAN_MR2 = 18;        /**         * Android 4.4: KitKat, another tasty treat.         */        public static final int KITKAT = 19;        /**         * Android 4.4W: KitKat for watches, snacks on the run.         */         public static final int KITKAT_WATCH = 20        public static final int L = 21;        /**         * Lollipop. A flat one with beautiful shadows. But still tasty.  Android 5.0         */           public static final int LOLLIPOP = 21;        /**         * Lollipop with an extra sugar coating on the outside!  Android 5.1          */          public static final int LOLLIPOP_MR1 = 22        /**         * M is for Marshmallow! Android 6.0         */        public static final int M = 23;        /**         * N is for ¯\_(ツ)_/¯. Android 7.0         */        public static final int N = 24;    }
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