android各版本号的定义和比较方法

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这是sdk版本判断的代码:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) 

{ ActionBar ab = getActivity().getActionBar();ab.setTitle("请选择"); } else { getActivity().setTitle("请选择");}

下面是各版本号的定义:

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;

	/**
	 * November 2012: Android 4.2, Moar jelly beans!
	 */
	public static final int JELLY_BEAN_MR1 = 17;

	/**
	 * July 2013: Android 4.3, the revenge of the beans.
	 */
	public static final int JELLY_BEAN_MR2 = 18;

	/**
	 * October 2013: 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;

	/**
	 * Temporary until we completely switch to {@link #LOLLIPOP}.
	 */
	public static final int L = 21;

	/**
	 * Lollipop. A flat one with beautiful shadows. But still tasty.
	 */
	public static final int LOLLIPOP = 21;
}