nextbus | GT NextBus - An Android app | Android library

Update the question so it focuses on one problem only. This will help others answer the question.

One problem only? But there is only one problem! I am trying to extract a single specific JSON value

I'm making an app that displays bus routes using the NextBus API and Google Maps. However, I'm having an issue with CPU usage that I think is being caused by the amount of GMSPolylines on the map. The route is displayed by an array of polylines made up of the points given by NextBus for a given route. When the polylines are added to the map and the GMSCamera is overviewing the entire route, the CPU on the simulator (iPhone X) maxes out at 100%. When zoomed in on a particular section of the route, however, the CPU usage goes down to ~2%.

Map Screenshot: https://i.imgur.com/jLmN26e.png Performance: https://i.imgur.com/nUbIv5w.png

The NextBus API returns route information including the route of a specific bus path. Here's an small example of the data that I'm working with:

I am new to React native.

I am trying to show Bus time to arrive at 6 stations meaning I have to put 6 API codes.

I actually implement only one API code, but if I use 6 API codes, I might have to use switch case statement, which I do not know how to make it...

And the other problem is that the bus time is not automatically updating. For example, if bus time to arrive is 9:26, after 9:26, it is not changed, it is still indication of that bus would arrive at 9:26, although 9:26 was already passed.

This is my code,

I am trying to access the time until the next bus arrives for a Live Feed bus transit system in Asheville NC at the given bus stop but I keep returning two console errors: "time is not defined" and "Cannot read property of geElementsbyTagName of undefined"

You can use "470" as an exam stopID to see the XML file.

I have made sure the right stop ID is being added although I am not sure I am adding the ID correctly onto the URL. If the element is nested in another, is that an issue?

I am trying to print out array's value, converting into string in the description of mapview marker. when I put nameList inside of return() under is okay, but description={nameList.toString()} in is just print out {object,object}, {object,object}, {object,object}

Please let me know how would I solve.

I'm building a bus predictions app using the NextBus API that will help users get prediction times and bus information. I've implemented a function that takes the user's current location and a chosen address and returns a list of 10 bus routes that minimize travel distance and time.

Here's the @IBAction that triggers the aforementioned function:

TL;DR: One JSON request sometimes returns an object and sometimes returns an array of objects for a key and I don't know how to parse that correctly with Swift 4.

Preface: I'm making a bus service app using the NextBus API to provide bus schedule updates and predictions for buses in the Chapel Hill area. However, I'm running into a problem when fetching prediction information for a bus stop (Prediction request info on pp 13-15 of NextBus API PDF).

The Problem:

A request for a stop prediction returns two keys: "predictions" and "copyright". While the "copyright" key always returns a string for a prediction request, the "predictions" key will sometimes return an object and sometimes return an array depending on whether there are two buses on the route or not.

Here's the problem visualized with Postman:

Predictions returns an array:

I'm trying to parse data from an XML page via a URL. However, I still keep getting a "NetworkOnMainThreadException" despite having all my network connectivity code in AsyncTask doInBackground. Can someone help point me in the right direction?

Class extending AsyncTask

I am trying to update state with API.

I tried to update API state with using setouttime,

in render(), there is if statement which if timepassed is true, this.get_bus will be called to update state. However I got warning cannot update during an existing state transition

Please let me know how to update...

this is my code.