获取安卓系统版本

public static boolean hasFroyo() {
        // Can use static final constants like FROYO, declared in later versions
        // of the OS since they are inlined at compile time. This is guaranteed behavior.
     //2.2以上
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
    }
    public static boolean hasGingerbread() {
     //2.3以上
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
    }
    public static boolean hasHoneycomb() {
     //3.0以上
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
    }
    public static boolean hasHoneycombMR1() {
     //3.1以上
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1;
    }
    public static boolean hasJellyBean() {
     //4.1以上
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
    }