Android gets the version number of the current app and the version number of the current system

1. Get the current program version name

We can set the version number of the program in Androidmanifest.xml, such as android:versionname= "1.0", if you want to get this version number in the code, you can use the following method ( These modifications to the version number only need to modify the settings in the Androidmanifest.xml, without modifying the code):

/*** Returns the current program version name*/      Public Staticstring Getappversionname (Context context) {string Versionname= ""; Try {             //---Get the package info---Packagemanager pm =Context.getpackagemanager (); PackageInfo Pi= Pm.getpackageinfo (Context.getpackagename (), 0); Versionname=Pi.versionname; Versioncode=Pi.versioncode; if(Versionname = =NULL|| Versionname.length () <= 0) {                 return""; }         } Catch(Exception e) {LOG.E ("Versioninfo", "Exception", E); }         returnVersionname; }   

2. Get the version number of the current app

 Public Static throws Exception  {          //  Get an instance  of Packagemanager        packagemanager packagemanager =  Getpackagemanager ();           // Getpackagename () is the package name of your current class, and 0 means to get  version information        PackageInfo packinfo = Packagemanager.getpackageinfo (Getpackagename (), 0);           = packinfo.versionname;           return version;  }  

3. Get the version number of the current system

/**       * Phone system version       */public       static  String getsdkversion ()          { return Android.os.Build.VERSION.RELEASE;      }  　　 /**       * Mobile      System APIlevel */public      staticint  Getsdkapilevel () {          return  Android.os.Build.VERSION.SDK_INT;    }   

Android gets the version number of the current app and the version number of the current system