How to get installed applications in Android and no system apps?

Question

I want to get all application which appears in the menu screen. But, now I only get the user installed apps or all the application (included the system application).

My current code is:

    final PackageManager pm = getActivity().getPackageManager();
    List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_META_DATA);

    ArrayList<PackageInfo> aux = new ArrayList<PackageInfo>();

    for (int i = 0; i < apps.size(); i++) {
        if (apps.get(i).versionName != null && ((apps.get(i).applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 1)) {
            aux.add(apps.get(i)); 
        }

With this code, I can get the user installed apps, and if I comment the 'if' instruction, I will get the system apps.

So, I want to get the user installed apps and apps like contacts, gallery and so on.

UPDATE:

    final PackageManager pm = getActivity().getPackageManager();
    Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    List<ResolveInfo> apps = pm.queryIntentActivities(intent, PackageManager.GET_META_DATA);

Answer 1

final PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);

Using PackageInfo:

private boolean isSystemPackage(PackageInfo packageInfo) {
    return ((packageInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
}

Using ResolveInfo:

private boolean isSystemPackage(ResolveInfo resolveInfo) {
    return ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
}

Using ApplicationInfo:

private boolean isSystemPackage(ApplicationInfo applicationInfo) {
    return ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
}

This filters the system package. See this question. Credits: Nelson Ramirez and Kenneth Evans.