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Questions tagged [android]

Android is Google's software stack for mobile devices. For non-developer questions, see http://android.stackexchange.com

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Logic to check if app was launched for the first time using DataStore

I have written a dummy code to check if an app was launched for the time using DataStore. It is working however i want to know if this can be optimised and i also observed a small glitch initially ...
dev4Life's user avatar
3 votes
0 answers
42 views

Trying to properly modelize app settings in a MAUI app following MVVM architecture

Context: I am working on a relatively simple MAUI app, which includes a Setting page allowing to customize the UX/UI of the app. I am trying to make the best use of the functionalities of MAUI, while ...
Toto's user avatar
  • 131
5 votes
1 answer
75 views

Compose Grid With Lists

I have created a Grid out of using the new concept of List in Kotlin. I'm open to any feed back to how this code could be improved. It functions as expected and I'm happy with the results. ...
xxxVxxxlinux's user avatar
2 votes
1 answer
58 views

Handling View State & Side Effects with Lifecycle Awareness in Jetpack Compose MVI Composable

I'm working on a stateful Jetpack Compose composable that follows the MVI architecture. I'm using collectAsStateWithLifecycle() to observe the view state from a view model, but I'm unsure about the ...
Android Developer's user avatar
0 votes
0 answers
84 views

React Native (expo) mobile application publishing to stores in Azure DevOps pipeline using different backends for different app versions

Mobile development is quite new for me, and I would like to ask about a solution review. I'm not sure the way I publish the application is correct, I think good companies may do it differently. I have ...
alcohol is evil's user avatar
1 vote
2 answers
111 views

Simple service that wraps access to json file

I'm wondering if this is the best way to write the Java code I have written. It works, but looks overly verbose, is it possible to rewrite any of the code to make it more concise? Please ignore the ...
Professor of programming's user avatar
2 votes
0 answers
189 views

Flutter Cubit: 2 Screens and Listview

I try to program a small app to track my cost spendings. As state management I use Cubit. As I am a flutter beginner, I wanted to verify if I implemented it correctly. The UI consists of 2 screens: 1 ...
Rasputin221's user avatar
4 votes
1 answer
193 views

Storing icons in Room Database

I want to store some 512x512 icons for my Android app in a Room database. This is so each item in a list can have all the text data along with the image data stored in a single record. The answers to ...
Adam's user avatar
  • 321
1 vote
0 answers
57 views

Architecting my Compose UI

I have designed a layout that includes recipe details and three CTAs in the app bar to share, delete, and edit recipes. I need feedback regarding the architecture of my Compose UI. ...
Android Developer's user avatar
1 vote
0 answers
36 views

Good way to coding on React-Native?

I'm new on this field of coding, and I start to create by myself a project for iOS and Android. I'm a bit lost of how I supposed to organize my code, I saw different persons on YouTube doing their ...
Dorian's user avatar
  • 11
3 votes
0 answers
128 views

MVVM signing in using firebase

I'm new to MVVM architecture. I want to have authentication with email + password, google and Facebook. I'm not sure if there should be separate view models for each authentication way: ...
Edziu Kowalski's user avatar
1 vote
0 answers
62 views

Learning Jetpack Compose: TabBar with Paging Screens

I'm piecewise reimplementing an existing iOS app. My initial go at it visually looks like this: I'm looking for any feedback on more idiomatic ways to implement what I've done. There's a couple of ...
Travis Griggs's user avatar
2 votes
1 answer
381 views

Android: Navigation with Hilt + Jetpack Compose

The project is simple: Login screen and a forgot password screen. You can navigate from Login to ForgotPassword. I feel like I overcomplicated things, but I don't know if (and how) it can be ...
Simon's user avatar
  • 245
1 vote
0 answers
254 views

Jetpack Compose: Items-list with Item-Details-view

The app is based upon an exercise from a Udemy-course. The purpose is to become familiar with LazyColumns. I've enhanced the exercise with a Details-view and a navigation between LazyColumn and ...
michael.zech's user avatar
  • 4,326
3 votes
1 answer
225 views

Jetpack Compose: Length-Units Converter

I have made a length-units converter with Jetpack Compose. Here's the source-code: ...
michael.zech's user avatar
  • 4,326
4 votes
1 answer
882 views

Android + Kotlin advanced color picker (HSV and RGB)

For almost the past year, I have been working on a pixel art editor for Android. My pixel art editor was relying on an external library for its color picker. For 0.2.0, I wanted to change this by ...
thebluepandabear's user avatar
-1 votes
3 answers
212 views

Android - A way to show/hide loader without writting false/true in every viewmodelScope.launch

I have been writting a lot of code that looks like this ...
George Shalvashvili's user avatar
2 votes
1 answer
75 views

Processing charge current error messages with HashMap<>

I have certain error states that I am displaying in my Android TextView but only one message is displayed at a time and if all values are set to 0, no message is displayed. So, I check all the values ...
Dylon Jaynes's user avatar
2 votes
1 answer
48 views

Observe LiveData to indicate whether or not to display TextViews in MVVM

In the context of MVVM, is this an efficient way to communicate to the view that I should display some TextViews? Any advice on how I can improve it? ViewModel code: ...
Dylon Jaynes's user avatar
3 votes
0 answers
1k views

Jetpack compose login screen + ViewModel

Im working on the login screen for my application. It has fields for users email and password. Also users can click on forgot password button to send an email with new passsword. It can validate these ...
Destroyer's user avatar
  • 477
2 votes
0 answers
174 views

Android architecture and dependency injection of domain layer usecases

I am implementing some of the architectural designs from Google I/O's app to my own app, but I have come across something in their app that has created some confusion for me. They have a domain layer ...
CJR's user avatar
  • 151
1 vote
1 answer
71 views

custom button class for android game engine

I'm a self-taught programmer and I haven't really followed industry-standard coding classes. I'm currently coding my own game engine for android, though and I was wondering if my coding style could ...
Gyoo's user avatar
  • 13
4 votes
1 answer
209 views

Calculator app made in Java (ver2)

A few days ago, I uploaded my first version of my calculator app I made in android studio. I got some great some feedback on it and tried to improve my app as much as I could. changes/new featres: ...
Philip Nous's user avatar
6 votes
2 answers
1k views

Simple calculator app made in Android Studio (Java)

I'm a college student in my first year of my bachelor in IT. I recently decided to try some app development with Android Studio and Java. For my first project, I made a basic calculator app. Here you ...
Philip Nous's user avatar
1 vote
1 answer
150 views

Is this session manager secure?

I'm looking for best practices for writing secure session managers. I'm making a table for the authorization token (UUID OR GUIDv4) with autoincrement, user_id, token, status (enum) then update status ...
Taa Lee's user avatar
  • 37
3 votes
1 answer
1k views

Getting a single result from multiple LiveData objects

I have an Android viewmodel for a Fragment that requires the user to perform multiple tasks. In addition to a LiveData object to track the status of each task, I ...
Moshe Katz's user avatar
5 votes
1 answer
3k views

Calculator App with Kotlin and Android Studio

Hello I am an absolute beginner with Kotlin and Android Studio. I want to hear what I could do better for the next time or any flaws my code has. The code implements a four-function calculator (+ - ✕ ÷...
cp54lory's user avatar
3 votes
0 answers
296 views

Android BMI calculator using LiveData

I have made a Body mass index-calculator using ViewModel and LiveData. Source-code of the MainActivity: ...
michael.zech's user avatar
  • 4,326
1 vote
1 answer
239 views

Safely and Quickly Trim a Byte Array of Audio in Java

I'm trying to take a raw byte array of audio and trim it. The user selects a start and end value using a range slider. ...
user avatar
4 votes
1 answer
424 views

Fragment to control and show camera images

I have never tried this before. Just started with Kotlin and Android CameraX. Here is a fragment I would like some feedback on so I can writer safer and better Kotlin code. ...
El_Loco's user avatar
  • 169
5 votes
0 answers
2k views

Android nested RecyclerView handling clicks, using OOP

Brief Background: I just started learning Android Development recently. I have some experience with programming and understand the basics of OOP but am not confident that I am using principles of OOP ...
Ricky's user avatar
  • 51
2 votes
1 answer
455 views

My Android app is really slow when getting simple data from PHP

I have a PHP API which echoes some data depending on the parameters in the URL: URL = "MyWebsite.com/MyAPI.php/username/password" When I try to access this API with Postman, I get the ...
KiDo's user avatar
  • 123
1 vote
1 answer
373 views

Android user input validation

I have made a tiny Android-project to familiarize myself with user input validation. The app just has an EditText-control for user input, a button "Compute Result" and a TextView, which ...
michael.zech's user avatar
  • 4,326
2 votes
1 answer
74 views

Code for working with a tasks in To-Do Android application

Overview I am working on an android To-Do app. I have a piece of code that I use to work with tasks.I am new to android development and want to grow, so I would really like someone to rate my code and ...
Destroyer's user avatar
  • 477
3 votes
0 answers
980 views

Android APP FTP downloading file implementation in Java

This is a follow-up question for Android APP connect to FTP server in Java and Android APP FTP uploading file implementation in Java. I am attempting to perform the download operation to specified FTP ...
JimmyHu's user avatar
  • 4,958
1 vote
1 answer
849 views

Android APP FTP uploading file implementation in Java

This is a follow-up question for Android APP FTP host profile class implementation and Android APP connect to FTP server in Java. I am attempting to perform the upload operation to specified FTP ...
JimmyHu's user avatar
  • 4,958
1 vote
1 answer
62 views

Android APP user registration page implementation

This is a follow-up question for Android APP User class implementation. I am attempting to build a user registering system and this post shows the user registration page implementation. The ...
JimmyHu's user avatar
  • 4,958
1 vote
1 answer
71 views

Android APP Password Strength Assessment class implementation

This is a follow-up question for Android APP User class implementation. I am attempting to create a password strength assessment class which is named ...
JimmyHu's user avatar
  • 4,958
1 vote
1 answer
95 views

Android APP FTP host profile class implementation

This is a follow-up question for Android APP connect to FTP server in Java. I am attempting to create a tiny FTP host manager with FTPHostProfile class and ...
JimmyHu's user avatar
  • 4,958
0 votes
1 answer
74 views

Android APP User class implementation

This is a follow-up question for Android app class serialization. The implementation of User class has been updated and the functionality of null string checking, ...
JimmyHu's user avatar
  • 4,958
0 votes
1 answer
416 views

Unit tests for User class with JUnit 5

This is a follow-up question for Android app class serialization. Some problems have been mentioned in forsvarir's answer. Then, I am following JUnit 5 User Guide to redesign the test cases for ...
JimmyHu's user avatar
  • 4,958
2 votes
1 answer
91 views

Android app class serialization

I am attempting to build an Android APP with the custom serializable class User. The public method Save is to save class ...
JimmyHu's user avatar
  • 4,958
4 votes
0 answers
2k views

Android APP connect to FTP server in Java

I am attempting to build an Android APP with the ability to connect specified FTP server in Java. The connection operation has been performed in FTPconnection class ...
JimmyHu's user avatar
  • 4,958
2 votes
1 answer
259 views

MutableLiveList class for android

I have wrote a MutableLiveList class for android, similar to existing MutableLiveData, but this class instead handles a list and ...
Sourav Kannantha B's user avatar
4 votes
2 answers
696 views

Android Tic-Tac-Toe

I have made an Android Tic-Tac-Toe adaptation as a weekend-project. Here's the Kotlin-code. MainActivity: ...
michael.zech's user avatar
  • 4,326
2 votes
0 answers
210 views

running a task on UI every x seconds

I often come around a requirement where we have to perform a repetitive task on the user's screen (for eg, updating a counter like flash sale/ live class timer, autoscrolling the banner, etc) . I have ...
ansh sachdeva's user avatar
2 votes
1 answer
355 views

UDP image livestream from Android device to C# desktop application

After searching a lot, on how to do it and not finding any good solutions, I implemented my own UDP livestream from an Android device to a C#/WPF desktop application. It works, however, since I get ...
Roland Deschain's user avatar
3 votes
1 answer
230 views

how to efficiently draw line numbers in edittext ondraw without causing lag in scrolling

I have an implementation of an edit text to show line numbers and also highlight the current line. I think it needs more optimization because when I scroll through the edit text with about 500 lines ...
Jore's user avatar
  • 131
2 votes
1 answer
59 views

Easter date calculator Android application

Since Easter holidays are close, I have decided to develop my Android skills by writing an Android app that calculate that date for the Western and Easter calendars. The formulas were gotten from the ...
user10191234's user avatar
3 votes
1 answer
68 views

Generating multiplication questions and answers for a quiz style app

See this link for previous post on this subject Generating mathematical questions and answers I have an Android quiz app that I am building to learn kotlin / android app development. Here is an object ...
UnknownError's user avatar

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