Questions tagged [android]
Android is Google's software stack for mobile devices. For non-developer questions, see http://android.stackexchange.com
752
questions
2
votes
0answers
32 views
Android - Simplify ViewModel and Repository classes with OOP
Let's say I have 2 repository classes:
...
2
votes
1answer
33 views
ZooRater mobile app. This code is responsible for displaying and handling zoo dashboard. Need general advice
Context: gitlab link
I know, it's a lot of code but I need your help ladies and gentleman. I'm not sure if I can ask for code review for the whole project so I just ask to review this activity. I ...
0
votes
0answers
41 views
Downloading large amount of data and storing on Android & iOS
So I have this API that downloads from our web service, but the we service sends it as a ZIP file instead of a json stream or something else.
Now the files can get quite large butt they are not ...
1
vote
0answers
31 views
Game Level Unlocking Logic Java [closed]
I am making a quiz game and every time you complete a stage, the next stage will be unlocked.
The Problem:
When I am at Stage 3 and finish it, Stage 4 is unlocked. But when I feel like I want to ...
3
votes
3answers
90 views
Java regex and replaceAll to extract strings into objects
I have this method that creates book objects. I pass a list of strings (size 60000+) that contain the information of the book, the function then goes and extracts the information makes the book object ...
1
vote
2answers
30 views
Does using SharedPreferences drain resources?
I have created class that uses SharedPreferences to store and retrieve application settings. Is it good idea to access ...
4
votes
1answer
55 views
Cloud Function: Deleting from both Firestorage and Firestore in a kind of “batch”
I've written code that deletes a "post" the user has sent with my Android app. A "post" is made of an image (stored in Firestorage) named A, of a Firestore document named B which is the user UID (this ...
1
vote
0answers
21 views
Uses SeekBar to adjust the data displayed in UI from my Room database
I wrote code that takes the value of the progress bar in my Android app which influences what is displayed on the UI. If the user's progress bar value is above or below a certain number, data will be ...
1
vote
1answer
42 views
Starting an activity after 1000ms from a splash screen with Runnable and Handler().postDelayed
I have implemented a splash screen which is the main activity of my Android app. This splash screen shows an image, and after 1000ms there is an animation to show another activity's layout.
The code ...
0
votes
1answer
60 views
Implementation of Conway's Game Of Life on Android
I ended up using 2x 2D arrays with a one element border around everything to simplify the kernel logic.
...
1
vote
2answers
54 views
Decrypt multiple 10Mb files with defined password
One operation of my Android project is to decrypt one file (chosen in a set of ~30 files for pagination1) of ~10 Mb each and I do this with the following:
...
1
vote
1answer
47 views
Notify observers when object attributes update
I have a Singleton manager class for managing request model and its attributes.
My main aim is update object observers when some of the object attributes changes.
...
1
vote
1answer
29 views
Sending DTMF tones from dialpad
I have the following code which works perfectly fine. I am using the dial pad to set the number and also to send the DTMF tones. But I find the code to bit more repitive. Is there any better way to ...
6
votes
1answer
49 views
Design a native video buffer in C++ to be shown on android application and shared with other modules in native space and Java
I'm working on a design for a video buffer in C++ that will be used by many consumers both in the native library space(C++) as well as Java side using JNI. My Idea is the following:
Have a buffer ...
2
votes
0answers
64 views
SharedPreferences singleton wrapper
I was wondering wether my implementation of the PreferenceService below is thread safe or could cause memory leaks.
Android Studio gives me the warning "Do not place Android context classes in ...
1
vote
0answers
34 views
Multiple Stopwatch App
I was fed up with the default alarm clock when doing laundry. The washing machine is in the basement and takes different time depending on the choosen program. The stopwatch has to be configured for ...
2
votes
1answer
89 views
Populate an ArrayList of different instances of a class
First of all, here is an overview of my application. I want to create a multiple-choice app, on android, using data stored on a remote MySQL database. The DB has 100 questions that will appear in ...
4
votes
1answer
65 views
Android Java Splash Screen code
Here's my android splash screen. I am trying to figure out a better way to write it. It just moves the logo up to the center of the screen. It's my third time creating a splash screen for an android ...
3
votes
1answer
47 views
Code feedback on running app
I have made an Android app called RunTracker - https://github.com/michaelnares/runtracker/tree/master/app. The intended functionality is that the app saves runs to the local filesystem, shows your ...
2
votes
1answer
81 views
Creating an empty Sudoku grid
I am generating a 9x9 grid on which I will play sudoku later by setting click listeners to each square on the grid.
I first have a .xml file that represents a single square in the grid. This consists ...
1
vote
0answers
24 views
Android: Fill a spinner data from the server dynamically
I'm new to android. How do you fill a spinner from the server's data dynamically.
This is my Spinner layout:
...
1
vote
1answer
53 views
Simple function to Http GET some data
This is within a base class of a library, where several other classes inherit this one.
This seems like the simplest way of just getting some data, for now without timeout/errorhandling. This is ...
0
votes
0answers
21 views
Load data from server to populate in spinner
I'm learning ROS and I'm trying to populate data from my server to spinner. my JSON is:
...
1
vote
0answers
33 views
Functions to obfuscate and deobfuscate String. Am I missing out any edge cases?
I have 2 functions, which are going to hide/ unhide the multiple languages plain text.
Security is not a major concern.
The objectives are
Just want to find a way to hide multiple ...
3
votes
0answers
53 views
Getting a list of waypoints assuming that there is a map [closed]
I'm a beginner learning ROS. I'm developing an android application that will control my robot and that includes getting the list of waypoints to display it to my spinner. How do you get the list of ...
1
vote
1answer
99 views
Night out with friends. Calculating the costs per person with Kotlin and Android
The following app basically sums up the costs for an evening and calculates the costs per person. The user can input the description of the costs [String] (for example, round one = Spare Ribs Place, ...
2
votes
1answer
80 views
Kotlin shared preferences
So I've written a class for storing user/device specific settings, but I've written the Kotlin pretty much like I would in Java:
...
2
votes
1answer
77 views
Creating many Android cardViews with different background colors [closed]
I have cardView in my android app with three child component. I set the background color for each components. Based on card INDEX I reset the background colors individually.
If it's just one cardView ...
2
votes
0answers
42 views
Upload to FTP method for Android that mimics the command line mv
I've created a Java class for Android that connects to a FTP server (using the FTPClient library from commons-net-3.6) and ...
2
votes
1answer
77 views
ViewModels for image transformations
In my project I have a chain of Fragments where each one gets a bitmap, manipulates it, then sends it to another fragment for more processing.
My fragment chain looks like this:
CaptureFragment -> ...
2
votes
0answers
78 views
Updating UI in Retrofit onResponse
I have an Android project that queries the BART train API. I was curious if updating the UI inside the Retrofit onResponse method is correct or if there is a better way. Below is my code. Also, here ...
1
vote
1answer
59 views
Kotlin Android request client
As part of an android app, I've written a simple wrapper that makes requests to an api and fetches stuff.
...
2
votes
0answers
36 views
Google Play billing + Firebase functions: Creating a one-time product, server-side
My Android app must request my Cloud Functions server to create in-app products at runtime ; then, the server responds with the created one-time product. I've written the server Cloud Function that ...
1
vote
1answer
47 views
Data class where i need to set values for different fields at different times
I am creating a request for an api using below class-
...
1
vote
1answer
126 views
TCP server in Android to continuously listen to an RFID reader
I have created a TCP server thread which I want to keep running and listening to the IOT device (an RFID reader).
I have only one client.
Please review my code and provide your feedback. Are there ...
1
vote
1answer
52 views
Android RecyclerView Popop Activity - 5 second popup time
So I've been working on a RecyclerView recently that's in a popup, and it takes a few seconds to popup with around 100 items. I want to make this faster, so any improvements on my code is appreciated :...
1
vote
1answer
128 views
Grid of radio buttons in Android
I want to display multiple radio buttons in a layout with multiline style as an item inside a RecyclerView. Look at the code I provided below and suggest how I can ...
2
votes
0answers
78 views
BASH script to obfuscate android/meterpreter payloads
I have written a little script that does a pretty good job of obfuscating android/meterpreter payloads. It will generate payloads or used supplied msf payloads while also injecting a custom icon. The ...
0
votes
0answers
33 views
Adapter for Spinner
I need to my spinner supported endless scrolling. As rule the user will have only 1 - 5 items but in very rare cases some users can have 100+ items that will be loaded from server by pages (15 per ...
0
votes
1answer
78 views
Optimize this code of adapter's overriden method getItemCount() [closed]
How can I optimize this code of adapter's overriden method getItemCount() into simpler form?
...
1
vote
0answers
162 views
Monitoring Services And Characteristics on React-Native [closed]
I have two questions for you about my code :)
I'm creating an android to connect to ble device. I'm using ble-plx library.
...
2
votes
1answer
52 views
RecyclerView with different ViewHolder using generic
I have different ViewHolder for different Feed implementations. But I can't use the best practice of having each ...
1
vote
1answer
54 views
Android LiveData Shared between activities by Application Session
I'm developing an app that use socket to receive messages from a chat.
I'm using an MVP approach and I store the data in a Singleton class named DataBridge like ...
5
votes
1answer
63 views
Google Maps API - reading locations from file and displaying markers on map
I'm working with Google Maps and want to read in location objects into the map. I'm loading them in from a .csv file and create Shelter objects for each location that I save in an ArrayList. To ...
4
votes
1answer
90 views
Android clock in/out app
I am writing a clock in / out and payroll app for Android. I am no professional, but I was hoping I could get some feedback on whether my code is spaghetti or not. This is just one of many classes &...
3
votes
0answers
243 views
Android+Firebase testing using Mockito
I have an interactor/usecase class in my application. My application follows MVVM architecture with interactor/usecases responsible for logic (e.g. get data from api-service, store in local-database ...
2
votes
0answers
37 views
Custom Security for API access from server to mobile application
i am not the best at security but need a custom way to securely store personal identifiable information like name, address etc - Can i please have some feedback on this custom code, from my ...
5
votes
0answers
156 views
Converting between cooking measurements
I've made an Android app that converts between cooking measurements, taking into account the type of product you use (that way it can convert between mass and volume by using the density). What are ...
4
votes
2answers
62 views
Android NDK Low performance
I am trying to write a NDK program for quicksorting an array. However, in my benchmarks C is doing consistently worse than Java, as indicated by my results:
Java 1190625
C 1809218
Java 895104
C ...
1
vote
0answers
110 views
Implementing std::filesystem::remove_all() for Android
I needed to use some c++ code on both standard Linux and the Android variant, and the code will use filesystem library but it isn't yet in the ndk.
So I'm making a one to use on Android
It will be ...
