获取当前版本号，与版本名

/**     * 获取apk的版本号 currentVersionCode     * @param context     * @return     */    public static int getAPPVersionCode(Context context) {        int currentVersionCode = 0;        PackageManager manager = context.getPackageManager();        try {            PackageInfo info = manager.getPackageInfo(context.getPackageName(), 0);            String appVersionName = info.versionName; // 版本名            currentVersionCode = info.versionCode; // 版本号            System.out.println(currentVersionCode + " " + appVersionName);        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }        return currentVersionCode;    }