android - Installed application is third-party or not

Question

How can I get the list of installed third-party applications on Android phone.

I am able to get the list of application with the code below but I want only third-party applications.

PackageManager pm = context.getPackageManager();
appInstalModel.setAppName(p.applicationInfo.loadLabel(context.getPackageManager()).toString());
appInstalModel.setAppPkg(p.packageName);
appInstalModel.setAppVersionName(p.versionName);

Answer 1

    List<ApplicationInfo> apps = getPackageManager().getInstalledApplications(0);
    for (int i=0; i < apps.size(); i++)
    {
        if ((apps.get(i).flags & ApplicationInfo.FLAG_SYSTEM) == 1)
        {
            //System app
       }
    }