PackageManager throws NameNotFoundException for all apps even my own app

I download all apps from Android and then show them in my launcher (icon + name). The code looks like this:

public class PhoneAppItem
{
    String mPackageName = null;
    String mActivityName = null;

    String mName = null;
    ActivityInfo mActivityInfo = null;

    public PhoneAppItem(String packageName, String activityName)
    {
        mPackageName = packageName;
        mActivityName = activityName;
    }

    public void loadInfo()
    {
        PackageManager pm = MainApp.get().getPackageManager();
        try
        {
            // following line throws the exception!
            mActivityInfo = pm.getActivityInfo(new ComponentName(mPackageName, mActivityName), 0);
            // some other code...
        }
        catch (PackageManager.NameNotFoundException e)
        {
            L.e(e);
            mName = mPackageName;
        }
        catch (NullPointerException e)
        {
            L.e(e);
            mName = mPackageName;
        }
    }   
}

      

        
        
        
      

    

The package names and activity names for all my items PhoneAppItem

are retrieved as follows (for android <5, which refers to the only known device having this problem):

List<PhoneAppItem> apps = new ArrayList<>();
ActivityManager activityManager = (ActivityManager) MainApp.get().getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> processInfos = activityManager.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo processInfo : processInfos)
{
    try
    {
        ApplicationInfo ai = pm.getApplicationInfo(processInfo.processName, 0);
        if (!excludedPackages.contains(ai.packageName))
            apps.add(new PhoneAppItem(ai.packageName, ai.className));
    }
    catch (PackageManager.NameNotFoundException e) {}
}

      

        
        
        
      

    

Now I have a user who is getting the following exception:

android.content.pm.PackageManager$NameNotFoundException: ComponentInfo{com.package.myapp/com.package.myapp.app.MainApp}
    at android.app.ApplicationPackageManager.getActivityInfo(ApplicationPackageManager.java:262)
    at com.package.myap.classes.PhoneAppItem.h(PhoneAppItem.java:70)
    ...

      

        
        
        
      

    

Observations

• the above exception is for all apps, even my own app
• so far this behavior is unique to one user using the following hardware: Lenovo Yoga Tablet HD + (b8080), Android 4.4.2

Question

Does anyone have an idea why this might be happening?