Android基础学习之获取当前apk的版本号

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