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

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Android MVP using Headless Fragment as Presenter

I've been experimenting with MVP pattern on Android, using dagger2, Otto eventbus, butterknife, Android priority jobqueue, and using retained Headless Fragment as a presenter. The basic setup is ...
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1answer
68 views

Parsing a file for an Android device

I am trying to parse InputEvents of an Android device. Background: For an android device we have a utility getevent ...
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1answer
34 views

Porting a web-based POS system to Android

I'm currently porting a web-based POS system to Android. The Android version uses NavigationDrawer to navigate between menus. What I need a code review on is my ...
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2answers
269 views

Localizing an enum in Java

I am currently using an enum in my Android application to display time periods: Weekly Bi-Weekly Monthly Quarterly Yearly I created the enum like this, because I wanted to know the description, ...
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36 views

Parallelized image transformations using GraphicsMagick

This is part of a script that I use for porting a TWRP Theme from one resolution to another. Respectively portrait to portrait and landscape to landscape. In this function entirely, it focuses on the ...
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1answer
49 views

Android - Simple multi-activity app

This is a task from lab classes at my university. Problem statement was to showcase following features: Multiple activities in app. Passing data from one activity to another. Changing behavior of ...
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2answers
67 views

Extracting a sentence containing a specific word from a longer text

My goal is to return a specific sentence in a story that contains a given word. Returns null if the word is not in the story. I'm ok with returning the first ...
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0answers
53 views

Is this test sane? I may have re-invented the wheel on how to test that a method does not block

I have an Android service which must offload a task to a different thread but schedule the response callback unto the calling thread. After much thinking I came up with this code: ...
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3answers
48 views

Saving and restoring RadixTree object

I have a large word-file which is fixed with over 240 000 words. I need to check if a specific word exists in this list. I thought that it would be a good idea to create a ...
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1answer
37 views

Downloading, decompressing and inserting data into an SQLite database

I have implemented a Service, which executes three operations, in the following order: Downloading a compressed (.zip) CSV file Decompress the CSV file Reading the CSV file and inserting the data ...
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1answer
46 views

Functionality for automatic retry after exception

I have made the following system to automatically retry network calls if some exception is thrown. (Earlier posted on stackOverFlow, solution inspired by what @Boris answered) ...
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39 views

Switching between several animations

I am making a game and my main character has many different states. Every state has different animations, for example ducking, flying, jumping, walking, hit by enemy etc. ...
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64 views

Getting device's location once in Android

In my Android app I need to get device's location once after user clicks a button. I don't really need to keep updating localization after I get the location coordinates. I created a class which uses ...
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1answer
67 views

Android Movie Class With AsyncTask

I've got a class called Movie and within this class I use an AsyncTask to get a Bitmap from ...
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1answer
102 views

Building an application activity

I'm beginning the long process of refractoring an Android app written entirely in SpaghettiJava™. I've been programming for a relatively short period of time (two years), and have tried refactoring ...
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1answer
90 views

Android Compass

I have made my first app in Android Studio. I made a compass using a sensor-listener. I would greatly appreciate if someone could review my code (it is very short), and suggest improvements. My ...
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2answers
206 views

Android App Interview (Minesweeper game)

I recently did an Android Minesweeper app for a pre-interview coding challenge before I could talk to any engineer and was rejected. This feedback was given but I'm not sure on some of it. ☺︎ Game ...
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0answers
100 views

Android calculator app

I am new to android developement. Created calculator application. Want to improve my code quality. Will be helpfull for any advice to make the code better and more professional (overall structure, ...
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2answers
350 views

Random 5-character token generator

I have an Android app that uses randomly generated tokens to log in. They're 5 characters long, are sent to a user's email address, and have a short lifespan, so I don't think I need anything that's ...
2
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1answer
65 views

Using a Subject to trigger a music list to reload

In my Android app I have a Service that is periodically polling a server for a music playlist XML. For certain occasions I also want to trigger a reload manually. I am using Retrofit for the server ...
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2answers
113 views

ThreadPoolExecutor singleton

I'm trying to build a ThreadPoolExecutor singleton to use it across my app. I'm very new to this concept and after going through Google docs I have created this: ...
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1answer
93 views

Tic Tac Toe Android game

Can you help me with suggestions regarding my code for Tic Tac Toe Game? This is my code, I've tested it and it works, but I feel like it can still be made shorter/clearer. I am not a good coder and ...
4
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1answer
67 views

Java (Android) abstract class correct implementation

I am looking for some comments on my code and whether or not this is the best way to create an abstract class. In addition, some of the abstract methods are rarely called so I use the base variables ...
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31 views

Android: accessing global data through replaceable instance

I have to access global data shared between activities in Android application. I have simplified DataProvider class to contain only one field - ...
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0answers
46 views

Fragment-changing in Android

My current code is kinda atrocious to switch fragments and everything, but I don't know a better way to check to see if the fragment I'm trying to switch to. ...
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41 views

Simultaneous works with multithreading

I have a case-study for an Android interview. I just wanted to get your opinion before I share the code with the company. There are two fragments: one of them uses a thread-callback structure and the ...
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34 views

Adding markers in Corona SDK for Android

I'm having trouble getting the marker added. (only tried on Android devices) I want to add the marker inmediately after the map is loaded. Got it working adding a delay but couldn't make it work by ...
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0answers
105 views

Map Events From calendar provider to dates in gridview

I working on a calendar app on Android, using roomaorama, which is nice. I am fetching all the events from Events table in Calendar provider once which seems not good performance wise. The library ...
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1answer
76 views

Speed unit converter

I'm basically a newbie in android app developing. So I'm not sure if this is the right way to write these codes. I have made an app called "Zconverter". It has 9 fragments and the code i m showing ...
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2answers
313 views
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1answer
41 views

Asynchronous login form handler

I have an app that user submit the log in form , when it sent the data to server app create a connection for its account. In this connection i have an integer field named as state. the state value is ...
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1answer
55 views

Android Compound View Usage

I have 2 buttons for Terms and Conditions in my project, that I need to implement in multiple activities. I created the following class: ...
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1answer
75 views

File reader and streamer component running in its own thread on Android

In an Android project, I have a class whose job is to read lines from a file, and then pump those lines to a message handling thread, looping forever until told to stop. The main operation of this ...
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2answers
67 views

Commute info entry fragment for Android app

This is a simple app for taking down a user's home and work address, the days of their commute, and the times they go to work and go home. The times and workweek are entered via TimePicker dialogs ...
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1answer
18 views

Location information (store/send over network)

I have to calculate a user's location periodically and store & send it over the network on Android. I also have to indicate errors during calculation of location as well. The errors could come ...
2
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1answer
92 views

Automating heap dumps from an Android device or emulator

I've automated the process of extracting and converting a heap dump from an Android device/emulator. I'd appreciate any feedback and improvements regarding style, bad practices, non-idiomatic code, ...
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263 views

Android app with an ActionBar, a ViewPager and an AsyncTask

I'm new at Android and Java development and I've put together a demo app to start learning, which is made of: a main activity extending ActionBarActivity, in ...
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2answers
515 views

Simple LibGDX Pong game

I created my first java game in LibGDX and it's working fine but I'm 100% sure a lot of my code can be written shorter than now. Does anyone have tips how I can make this code better? Like the ...
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1answer
179 views

Loading Bitmaps Efficiently

Suppose there is a huge bitmap, huge_bitmap, in the drawable-nodpi folder. I want to create a custom view with ...
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1answer
223 views

Displaying a list of players and their leagues

My question is mostly directed towards the principles of object-oriented programming. I have an Android application and one of the activities has a ListView. In ...
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1answer
234 views

Performance optimization on Box2D with libgdx

A few days ago I decided that I wanted to get involved with libgdx. So far I'm blown away by how simple it is to get something on the screen to work with. I'm trying to make a very simple tech demo ...
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0answers
77 views

Weather application code for API call

I have developed a simple weather application that provides the current weather report based on the city provided by the user. Can anyone help me to improve this code? ...
4
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1answer
82 views

Checking alert dialog validation

I have set alert dialog on textview's onclicklistener, and there I have added some items using array adapter. Now what I want to do is check if the user selects an ...
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24 views

ResourceProvider is generalization of the ways to obtain objects of some type at the point of their use (when there are several ways)

Often I need to use objects of some type which can be obtained in different ways. For example, list of strings. Strings can be loaded from resources (i.e. using resource id and a Context\Resources ...
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3answers
318 views

Live character count for EditText

Could you review it and said if it's written good and/or is better way to do that? My algorithm is: ...
2
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1answer
128 views

Styling android widgets programmatically

I have code which styles standard Android widgets programmatically (not from XML). The code is working, but I have this bunch of if instanceof else if instanceof ...
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0answers
222 views

MVC Login for Android

The code for my Android application is below and so far I'm happy with it. Before anyone comments, I do acknowledge it requires the addition of further validation. The android application is a login ...
2
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1answer
103 views

Adding items to a database from a dialog

I have a spinner in my activity that upon selection of one of it's options needs to handle the addition of a new object to my ...
5
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1answer
131 views

Isprime Android app with kivy

I thought that developing an app in Python should be easier than learning Java. I finally got my isprime app to work but it looks ugly. When I write GUI code I always find myself typing in very long ...
6
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2answers
166 views

Strategy Pattern Implementation

I thought I would learn a design pattern today and picked this one. I wrote a simple Android test demo to test the pattern. main.xml ...