PackageManager manager = this.getPackageManager();
try 
{
	PackageInfo info = manager.getPackageInfo(this.getPackageName(), 0);
	String packageName = info.packageName;  //包名
	int versionCode = info.versionCode;  //版本号
	String versionName = info.versionName;   //版本名		
} 
catch (NameNotFoundException e) 
{
	e.printStackTrace();
}