GitHubUsers | Android App for searching users on GitHub | Mobile Application library

I am working on an app that queries the github api to get a list of user and i'm following the recommended android architecture component guide. Once the data is fetched from the network, I store it locally using Room DB and then display it on the UI using ViewModel that observes on the LiveData object (this works fine). However, I want to be able to have a button which when clicked would trigger a refresh action and perform a network request to get new data from the API if and only if there is a network connection. The issue is when I click the button, two network calls are triggered, one from the refreshUserData() and the other one from the already existing LiveData that was triggered during onCreate(). How best should I handle this situation such that my refresh button performs only one network request and not two as is the case. Here's my Repository class:

I have a reactive angular form that looks something like this.

Hi I am trying to set up an onclicklistener for my RecyclerView, but it is crashing when I click on the name in the RecyclerView with the error code:

java.lang.NullPointerException: Attempt to invoke interface method 'void com.motivecodex.githubusers.adapter.RepositoryAdapter$OnItemClickListener.onItemClick(com.motivecodex.githubusers.database.table.Repository)' on a null object reference at com.motivecodex.githubusers.adapter.RepositoryAdapter$ViewHolder$1.onClick(RepositoryAdapter.java:52)

RepositoryAdapter.java

I am working on an angular js app with karma/Jasmine testing framework, I need to test a factory that returns a http promise but it always return undefined

here is my factory