How to determine whether a package exists in the system for an activity

Tag: Io Div CTI new SP on res C

Determine whether a package exists in the system (from the network). After testing, it is easy to use:

Public Boolean checkbrowser (string packagename ){

If (packagename = NULL | "". Equals (packagename ))

Return false;

Try {

Applicationinfo info = getpackagemanager (). getapplicationinfo (

Packagename, packagemanager. get_uninstalled_packages );

Return true;

} Catch (namenotfoundexception e ){

Return false;

}

}

 

It is tested to determine whether an activity exists in the system (from the network:

Intent intent = new intent ();

Intent. setclassname ("package name", "package name. Activity name ");

If (getpackagemanager (). resolveactivity (intent, 0) = NULL ){

// This activity does not exist in the system

// After testing, the activity that is not in the system is indeed executed here

}

Else

{

// Some activities are actually executed here.

}

Note: after testing, the result of judging the self-contained package in this program is certainly exists and can only be used to determine the packages outside the program.

 

Public Boolean checkbrowser (string packagename) {If (packagename = NULL | "". equals (packagename) return false; try {applicationinfo info = getpackagemanager (). getapplicationinfo (packagename, packagemanager. get_uninstalled_packages); Return true;} catch (namenotfoundexception e) {return false ;}}