获得本app的版本号

话不多说，直接贴代码

PackageManager manager;

		PackageInfo info = null;

		manager = this.getPackageManager();

		try {

			info = manager.getPackageInfo(this.getPackageName(), 0);
			String name = info.versionName;
			int versionCode = info.versionCode;
			String packageName = info.packageName;
			Signature[] signatures = info.signatures;
			System.out.println(name+"++++++++++"+versionCode+"+++++"+packageName+"========nnn"+signatures+"=============");

　　以上的代码就能获取其版本号