Questions tagged [android]

Android is Google's open source OS and system for smart phones and tablets. Use this tag for software engineering questions about Android; for user questions, visit our sister site Android Enthusiasts Stack Exchange.

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10 views

File handling Android

I'm newbie in Android development and doing on my first Android project and faced with .txt file handling. I succesfully created a txt file on Android Emulator, which is stored in: /storage/emulated/0/...
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62 views

Is it good approach to create new viewModel class for every new Ui(Fragment/Activity)?

I am working on a project in which I am following clean Architecture from Google ... and for making code testable I am following an approach in which,I am creating a new ViewModel Class ViewModel ...
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70 views

Do shared ViewModels contradict MVVM?

I want to follow the MVVM app architecture. I also need to have some communication between some fragments. But the official approach is pretty confusing. Taken from the docs (https://developer....
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1answer
54 views

When to fetch/send data in an Android application

I am currently creating an Android application and I have the following questions: We have a server which provides data for the app in form of a REST-JSON-API. The App is following the MVVM ...
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43 views

Internal design of Android app

I have an Android app which stores data in a file system. This file system synchronizes with a server when there is an internet connection available (but is designed to work without a network ...
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1answer
117 views

Check location permissions with MVVM in Android?

I need to request runtime location permissions for the FusedLocationProviderClient api and, once I have them, obtain Location objects and feed them to an algorithm that will make a query to an ...
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137 views

Code Structure: Keep classes simple or keep usage simple?

Tl;dr: In terms of the "high cohesion and low coupling" principle, how do I best deal with many simple objects that need to access the strings.xml resource in order to correctly parse an output? I'm ...
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20 views

Sequence Diagram Assistance with external database

I have 5 Java/android classes which are in sequential order. The user inputs data into the text box and clicks next. Two things happen, 1 the data the user inputs is passed to the next activity and it ...
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1answer
23 views

What form of single instance class for a cache under Android

The app is to communicate with a bluetooth device with assorted data (config, measurements, service logs, status telemetry) - and it should cache obtained data so the user flipping between activities ...
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3answers
243 views

Should business logic be in the app or in the backend?

I've recently started applying the Clean Architecture while developing an Android application. And so I divided my application in 4 different parts. Data layer Contains the implementation of ...
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0answers
27 views

Do I need provide translation for an UI library

I have a library for a lockscreen in Android, that includes diferent dilogs for fingerprints, texts and all that stuff. My question is: What the best practice to provide localization. Should I have ...
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2answers
152 views

who is responsible to define the algorithms, the class and data structures in a scrum team?

We developed our app for iOS and Android in native code. Before using scrum we had the following development logic: We define the overall product requirements (for iOS and Android app) The iOS ...
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1answer
131 views

Why are cloud services needed for push notifications?

We currently have a customer that wants us to implement push notifications to our app. The problem is that for this customer, security is really, really important... I am not able to find any official ...
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1answer
87 views

Implementation of Android Fingerprint technology [closed]

I'm currently doing a web based system for multiple organizations, so on my login form, there's 3 simple field: Company code, such as CNN (this is implemented so we can have same username, as long as ...
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2answers
121 views

Some Suggestion about Data Modeling

I want to make a social game for Android. I am using NoSQL Based Database (MongoDB) and I am using NodeJs. I am using Android-Volley library to make POST and GET requests. But I am stucked on ...
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1answer
50 views

Deploying Multiple Versions in One App Package

This is a question about Android, and iOS apps. The technology is Xamarin (C#) but this is not really important. The app will be deployed to the stores. The client app must be compatible with the ...
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1answer
43 views

Is a localized Mobile App considered bad and prone to removal from Apple/Google's perspective?

For the occasions that I've been offering SaaS, I've been asked to develop Apps that are pretty much a clone of regular e-commerce webpages, but with a few features like notifications and, well, being ...
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154 views

Best practice for Asynchronous CRUD operations in Android/Java

A few months back, I was working on designing a client API (FooManager) for adding/removing/fetching a list of objects (Bar). The requirements were simple- 1. Fetch operation is CPU-intensive and ...
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1answer
45 views

IOS/Android Push notifications

I am planning some app as a part of our product. One part of the app will be to receive push messages. Sometimes it's months between uses of the app and, by experience with other apps I've used, it ...
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1answer
164 views

Storing session data on client or server side

I have an Android application that communicates with the server using REST. During the flow, the client(Android) usually send 3 separate requests to the server with different data. Some of the data ...
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1answer
118 views

Should MVP adapt the software framework, or just reside inside it?

In android there are many different implementations for MVP. Most of them favor to use the Activity or Fragment as the view, a few would make them presenters, and even less, would separate the ...
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1answer
43 views

What happens to threads when On Sleep Mode and after?

When an android device enters sleep mode it is know that cpu sleeps. That means that, services, threads are paused and everything sleeps. Is that true? In case it is, what happens after the device ...
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1answer
183 views

In The MVP architecture does the Activity or Fragment must be the View component?

In our team, we separate the UI logic from the Activity or fragment by creating a new class for the view and let the Activity/Fragment manage the Life Cycle only is this good practice or not? public ...
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1answer
44 views

Connecting android app(android studio) to myphpadmin database(already on the server)

I have a website for admin and a mobile app for normal user. Both of them share a same database which is now on the cloud(The website for admin is already deployed with the database on the server). ...
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1answer
51 views

Optimising network data usage in vehicle tracker

I'm currently working on an Android application that broadcasts the location of the device every 5 seconds. Pseudo showing current app process: deviceLocation = getLocation() if (hasChanged(...
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1answer
65 views

What happens to media files when a WhatsApp user recalls the message? [closed]

WhatsApp has the "Delete For Everyone" feature that makes it easy to delete messages you did not intend to send to the other user. For text messages, this recall is easy, but what about Video, Photo ...
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1answer
86 views

Directing user to a specific screen on App after he installs the App

I have a very specific use case. We are working on a Project where user can buy the tickets to an event. In this, we are asking the user to enter an Email id where he can receive the email from where ...
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1answer
261 views

Best practices for app-cloud synchronization of database representation

I'm planning a cookbook-like Android app that would let users store/add/edit their e-juice recipes, keep track of the ingredients, etc. Internally, I'll be storing the data in a database on the user's ...
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1answer
86 views

Can a user read static member values?

For my Android application, I wanted to store values such as username, userid and stuff in a sharedpreferences object. However, when I read more about it, rooted users can still have access to those ...
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0answers
118 views

Help with understanding/implementing MVP architecture in Android

I'm trying to decipher/understand the best way to implement Model-View-Presenter architecture for the following Android example app... The App: I'm attempting to implement a very basic weather app ...
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4answers
603 views

Proper way to name a class which has just methods and not fields

GOAL: naming a class which has the responsibility to save data in Android database. The class structure is like this ClassName { public void saveSync(...){ /* implementation*/ } public ...
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1answer
42 views

Doing operations securily from an Android application into a Server

I have come up with a problem in my development and I have searched for correct solutions but have not found any. I am developing an application which lets users login with username and password. ...
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1answer
249 views

Best practice API design for mobile app in sending multiple photos in one request?

I'm working on API design for a mobile app where the user can send one or more photos that will be stored in the database. Currently I have three routes, post photo/create which will send one photo ...
4
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1answer
2k views

Access multiple entities in repository - clean architecture

I have a API call that returns a list of Payments, each Payment contains a User. I need to call it, save the results in the database, fetch all the payments and users and return them all to the ...
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0answers
193 views

Android Multiple Threads for I/O Operations in Room

I have a small example that i run on a real device with 4+4 cores. ExecutorService service = Executors.newFixedThreadPool(4); for(int i =0 ; i<1000; i++){ Runnable task = new Runnable() { ...
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2answers
42 views

Web Services with Android and iOS apps

I have a website which uses REST Api for communication. All data retrieval and save happen through Rest Api calls(polyglot environment). Now I am planning to create an Android and iOS app . I have ...
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3answers
507 views

Can Java applications run on phones (at least android) AND Windows?

Hi all I love stackoverflow so helpful. Afaik IOS has some security measures that dont let other apps (such as jvm) execute code from your app. Not sure how much this is true. But anyway, I heard ...
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2answers
184 views

Is this Singleton-like design pattern a feasible framework to build on?

I am posting this question here after it having been determined to be "off-topic" for stackoverflow, and "too hypothetical" for codereview. I am experimenting with different singleton-style design ...
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3answers
126 views

Is there any rule of thumb regarding which version of Android you should target, minus the current version?

I am working on an Android app, and trying to figure out which version I should target. The current version is 28, so I figure that targeting any version of that minus 3 (ie >= 25) seems reasonable, ...
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2answers
186 views

The best way method to write an app that takes you to a web page that depends on the time in a browser app?

I'm not a software developer at all, but wondering if this would be a relatively simple project for creating an android shortcut. My parents like doing the guardian quick crossword: https://www....
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1answer
40 views

What are good strategies to use for learning the workings of larger systems? [duplicate]

For obvious reasons (be a better developer) I desire to gain a deeper understanding of not just my code, but the systems / frameworks / libraries that I work with. As a senior-ish dev* I feel I should ...
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1answer
58 views

Web designer equivalent in Android and iOS worlds?

When web came, for years designers would create stunning designs in Photoshop, and developers would try to translate those designs to HTML/CSS/JS. This had many problems with itself. Lack of ...
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0answers
30 views

ExecutorService Doubles Memory in API<26 Android [closed]

My app downloads data from a PHP Server using threads from an ExecutorService with ThreadPool size 4. In API 27, the app runs perfectly without causing any OOM exception from the Heap memory. But all ...
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1answer
497 views

What is the correct way for one presenter to communicate to another presenter or view with the MVP pattern on Android?

I have an activity with two fragments attached, Fragment/View A controlled by Presenter A and Fragment/View B controlled by Presenter B. View A is on the top half of the screen and does not change ...
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1answer
164 views

Handling Networking on Android

While doing android development. There is really no clear way of doing network operations, Sending and receiving data. Currently I am handing it using HttpsURLConnection and having streams to build a ...
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4answers
562 views

Is it ethical for an android application to check if its rival application is also installed by the user?

I was just going through a food delivery application's preferences file where I found that it had a boolean to check if the user has one of its rival's app installed or not. Is it ethical to do so on ...
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1answer
272 views

Android app using php mysql session

I am developing an android app. Backend code php and mysql. I can register login using php myql. But I want to add profile information using android app. But the information goes as another user id. ...
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1answer
252 views

Why are the Android runtime and native libraries in the same layer?

Regarding the diagram in Android's website: https://developer.android.com/guide/platform Why did they put the Android Runtime category in the same layer as the native C/C++ libraries category. ...
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1answer
1k views

Unit Testing in VIPER Architecture: Possible?

TL;DR There are no methods in VIPER which are returning any value so how to test them? Reasoning: In VIPER, each layer is communicating with other layer by holding an abstract reference to it (...
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3answers
2k views

Proposed Method to Restrict API Access to Mobile App Only

I read a lot that you can't restrict your Public REST API to only your mobile application, but I have an idea and I want opinions on it: Variable App Key Method Mobile App Get IP address of current ...