Questions tagged [android]
Android is Google's software stack for mobile devices. For non-developer questions, see http://android.stackexchange.com
779 questions
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Auth0 Credentials Manager in Android app
I am building an Android app that communicates with a REST API using Retrofit2 and uses Auth0 for authentication. The Android app needs to store access token from Auth0 and use it to authorize its ...
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3
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133
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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 ...
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54
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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 ...
- 131
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97
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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.
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2
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1
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77
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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 ...
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90
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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 ...
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2
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2
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122
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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 ...
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218
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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 ...
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4
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1
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218
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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 ...
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0
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39
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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 ...
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133
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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:
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393
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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 ...
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273
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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 ...
- 4,516
3
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1
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230
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Jetpack Compose: Length-Units Converter
I have made a length-units converter with Jetpack Compose.
Here's the source-code:
...
- 4,516
4
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1
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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 ...
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3
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219
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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
...
2
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83
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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 ...
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2
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52
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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:
...
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3
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1k
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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 ...
- 459
2
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180
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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 ...
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1
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72
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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 ...
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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:
...
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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 ...
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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 ...
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1
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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 ...
- 462
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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 (+ - ✕ ÷...
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3
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299
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Android BMI calculator using LiveData
I have made a Body mass index-calculator using ViewModel and LiveData.
Source-code of the MainActivity:
...
- 4,516
1
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1
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251
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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.
...
user177754
4
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1
answer
458
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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.
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2k
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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 ...
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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 ...
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380
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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 ...
- 4,516
2
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1
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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 ...
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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 ...
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1
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885
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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 ...
- 5,510
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1
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63
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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 ...
- 5,510
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77
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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 ...
- 5,510
1
vote
1
answer
99
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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 ...
- 5,510
0
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76
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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, ...
- 5,510
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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 ...
- 5,510
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99
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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 ...
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2k
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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 ...
- 5,510
2
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1
answer
264
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MutableLiveList class for android
I have wrote a MutableLiveList class for android, similar to existing MutableLiveData, but this class instead handles a list and ...
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2
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712
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Android Tic-Tac-Toe
I have made an Android Tic-Tac-Toe adaptation as a weekend-project.
Here's the Kotlin-code.
MainActivity:
...
- 4,516
2
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0
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213
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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 ...
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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 ...
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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 ...
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1
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59
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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 ...
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1
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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 ...
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1
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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 I have which acts as one of many question builders.
Is there a better way of writing this?
<...
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