getInstalledPackages issues in Android simulator / device 2.2

The code above does not give quite every installed package (for instance, it does not give the package this code is running f开发者_如何学Pythonrom). The code runs from the main thread, never tried other device / emulator versions besides device / emulator 2.2. Any idea what is wrong ?

Thanks

public Map<String, String> getInstalledPackages()
{
    Map<String, String> apps = new HashMap<String, String>();
    List<PackageInfo> appsInfo = pm.getInstalledPackages(0);

    for (PackageInfo appInfo: appsInfo)
    {
        try 
        {
            apps.put(appInfo.packageName, appInfo.versionName);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    return apps;
}

PS: if I try it with pm.getInstalledPackages(PackageManager.GET_ACTIVITIES) it returns an empty Map - tried on device ony

If I replace

List<PackageInfo> appsInfo = pm.getInstalledPackages(0);

with

List<PackageInfo> appsInfo = getPackageManager().getInstalledPackages(PackageManager.GET_ACTIVITIES);

I get the package of my application.