Packagename of Installed apps

I want to work on an app similar to Package Name Viewer 2.0 that could load the packagenames of all the installed apps in the device. Actually I have searched a lot about it even discussed with my seniors and even tried to contact with the owner of Package Name Viewer 2.0but got no answer. I am not asking to write the whole code just give a favor that how can i achieve this.

In short: I want to add the code in onCreate() that whenever app starts it should load all the packagenames of installed apps.

Related Question: How to get package name from anywhere?

Use PackageManager to retrieve ApplicationInfo of all apps.

 public static List<App> getAllAppInstalled(Context context) {
    PackageManager packageManager = context.getPackageManager();
    List<App> apps = new ArrayList<>();
    List<ApplicationInfo> packages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);

    for (ApplicationInfo packageInfo : packages) {
        String applicationName = ((packageInfo != null) ? packageManager.getApplicationLabel(packageInfo) : "Unknown").toString();
        if (packageInfo.enabled) {
            apps.add(new App(applicationName, packageInfo.packageName));
        }
    }

    return apps;
}

App class should look like:

public class App {
private String appName;
private String appPackage;

public App(String appName, String appPackage) {
    this.appName = appName;
    this.appPackage = appPackage;
}
//getters and setters
}