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Integrating Hacker News API in Android app, total data is in the form of items, actually trying to display topstories in a ListView using this API https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty but data is in this format (Result of above API) [ 11547212, 11546098, 11544988, 11546490, 11543083, 11544016, 11545112, 11545975, 11543258, 11541675, 11544510, 11543188, 11544254, 11544374, 11541702, 11545351, 11542995, 11542005, 11543646, 11540747, 11541834, 11541242, 11544686, 11544523, 11546077] these are id's of each story as per documentation. So for displaying a list of Top-Stories what is the procedure.
You will have to load each item by id, for eaxmple use this
https://hacker-news.firebaseio.com/v0/item/11547212.json
where 11547212 is the item-id of the story you want to load. You will get basic meta information for this story, includeing author, URL and title.
You may also use firebase itself to access the data. There is a Firebase SDK for Android available.
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I wonder if there is any way in that I can import a firebase database JSON to the app via code and then access it via code from the app (Kotlin)
The native Android API for Firebase doesn't take JSON as its input or output. But the REST API does, so you could access the REST API in your app to work directly with JSON. Alternatively you could write a (fairly simple) wrapper to do the conversion from DataSnapshots to the corresponding JSON.
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I am working on a simple news app project in android for which i want to use different news api but someone told me to use rss feeds for more updated news. I think api is good option but I am still learning and don't know what to do now.
If you want to integrate popular newspaper news you should used rss feeder for your app. if you want to make it custom newspaper app going for api integration.
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I am new to Android programming and I want to make an online marketing app, but I have no website as web service for send and receive data in database between server and client. What can I use instead of a website?
Can I use any free API for it? I searched API and checkout below links:
https://moz.com/blog/apis-for-datadriven-marketers
https://www.programmableweb.com/category/marketing/api
https://firebase.google.com/docs/storage/android/start
Maybe you can use Firebase for data store and retrive in realtime: and it's free
https://console.firebase.google.com/u/0/?pli=1
You can create your own database and retrive and store date there.
https://github.com/firebase/quickstart-android
for referance its github example
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Is there a way to count how many users currently installed my app on their phone , then show the result for example in a text View ?
According to this answer there is an open source called Andlytics Project which will enable you to reach your goal, also you can view this library called segment which as they said it enables you to :
Collect customer data with one API and send it to hundreds of tools
for analytics, marketing, and data warehousing.
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I'm developing an android application which is an objective type,In my app there are 4 subjects like C,C++,Java,Android,Users should select the subject of their own choice for example If users selected Android it will load Android Chapters from chapters topics should be loaded and now they should take a quiz on that particular topic till here I have done and its working fine, Now I need to store the questions and answers in mysql database and I should retrieve them according to the topic wise. How to load the questions and answers from database and a topic may contain more than 10 questions How to validate them and show the score to the user?
You can use web service to connect to your mysql DB using ajax and json/xml data format. query the data from DB and output the data using JSON/XML. parse the JSON/XML data and display in your content.