Does the Android platform lend itself well to a particular style of UI programming like MVC or MVP? Most of my UI experience is with spaghetti code on a very old embedded device or in GWT with MVP so I do not know where to start.
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While programming on Android, I end up writing a parent activity which is extended by several others. A bit like ListActivity. My parent activity extends Activity. if I intend to use a Map or a List, I can't use my parent activity as superclass - the child activity can only extend one activity obviously. As such I end up writing my parent activities with the same logic for Activity, ListActivity, MapActivity and so forth.
What am I looking for is some sort of trait functionality/design pattern which would help in this case. Any suggestions?
Looking out for theme development for various Mobile Devices & Platform:
Nokia and Sony have official Themes Creators/Preview and Manual. look for others also.
LG,HTC,Blackberry, Android,iPhones,Windows Mobile etc.
I fight with me for some days about asking this question.
Its pretty plain and simple:
If you have an application with a GUI totally working on 2D drawing, what should be the best practice to handle what to draw and where to touch?!
Some example for better understanding:
I have a game with a map. On this map I can build houses and stuff.
I also have a information bar which can be extended. On the extended bar I draw some information about the game and also enables to change different values. If a touch occurs, I have to check, if the information bar is extended or not to determine if I want to change something on the map or something on the bar.
Thats done by the State Pattern, but I have some doubt if thats the right one because I think it can be a bit complex because of possible "sub-states".
So basically the question: Is the State Pattern (from GoF) the best practice to handle a pure graphical GUI?
I have several related database tables and I would like to treat their rows as objects and their tables as something like lists. What are the considerations that I have to keep in mind (for instance, ensuring that the objects stay consistent with one another and with the database, lazy loading)? And what is a good design pattern for implementing this? As I imaging the answer is pretty involved, a link to a good website would suffice.
On the other hand, if someone knows of Hibernate-like thing that really works on Android, I might give that a whirl (although it's a little heavy weight for me right now).
I've got a common task that I do with some Activities - downloading data then displaying it. I've got the downloading part down pat; it is, of course, a little tricky due to the possibility of the user changing the orientation or cancelling the Activity before the download is complete, but the code is there. There is enough code handling these cases such that I don't want to have to copy/paste it to each Activity I have, so I thought to create an abstract subclass Activity itself such that it handles a single background download which then launches a method which fills the page with data.
This all works. The issue is that, due to single inheritance, I am forced to recreate the exact same class for any other type of Activity - for example, I use Activity, ListActivity and MapActivity. To use the same technique for all three requires three duplicate classes, except each extends a different Activity.
Is there a design pattern that can cut down on the code duplication? As it stands, I have saved much duplication already, but it pains me to see the exact same code in three classes just so that they each subclass a different type of Activity.
Edit: Since it seems I need to be a bit more specific...
Suppose I'm trying to solve the problem of an AsyncTask background download during orientation changes. The solution I have right now is to use callbacks; there's download manager that I have which starts these downloads, and then I have the Activity attach a callback to it. When the orientation changes the Activity is destroyed and then recreated; during this process I detach the old Activity's callback, then attach a new callback from the new Activity afterwards.
Orientation changes are a common problem, and in multiple Activities I start the Activity with a progress view while the data loads. What I am trying to solve is not having to re-implement this orientation-handling logic ten times over; my initial solution was to subclass Activity, but then I got the problem above.
As i am building multiple activities, i realise that i have to code out repetitively this segment.
CODE:.......
So that i can return to the home page.
Is there some structural pattern or design pattern that i am missing out? Like a Activities Manager that manage all the activities?
I am going to develop an Android Application but before developing it i needs to have MockUp for the Android Application,so is there any way to design MockUp/GUI Design tool for the Android Application?
I know about DroidDraw tool , but i think it is not the exact way to prepare Mockup for the android application.
I have already referred this SO Question , but overthere i just found all the tools for the I-Phone only. So please feel free to share with me if you have/found any !
What happens if I enabled the pattern lock by updating the setting LOCK_PATTERN_ENABLED, but have never set a pattern? I would check, but I don't want to reset my phone (I don't see a way to clear the lock pattern). Does anyone know?
View 3 Replies View RelatedThe subject is pretty much it. With pattern lock security enabled, what happens during an incoming call? Must you enter the pattern to pick up the call, or can you simply press "Send"?
View 2 Replies View RelatedIs there a lock pattern on the DHD, the one where you swipe it in a certain pattern like I saw on the original desire?
View 4 Replies View RelatedI have done a small app for the ADC2 and now i want to make a free light version for the Android market and one full version that will cost some cents.
My question now to all who have done something similar: How have you designed your application(s)? I have thought about a few solutions to this problem:
1.) Duplicate the code in two different android projects Not a very good idea, duplicate code is always bad.
2.) Create some sort of library to use in two different projects. With this i could share the business logic of my app, but not the activities (at least this is what i think) And using the activities from one project in another project would be great.
3.) Include all needed code (business logic, activities, ...) from one project (the full version) in my light version. This way i would achieve some sort of new "view" to the code basis. This would be the best solution i think, but i do not know how to achieve this.
So to everybody who has done a full and light version of one and the same app: How have you done this?
I have tried DroidDraw and the Eclipse layout editor and both seem very difficult to create anything other than very simple layouts. I find myself dropping back to the XML file to be able to manipulate it.
Has anyone found any good tools to design the actual screens? I am not looking for a mock-up tool... but an actual tool to create the XML layouts.
I'm using Relative layout for designing UI. Please give me guidelines to follow.
View 2 Replies View RelatedWhat are the best practices to design webservices for mobile (particularly Android) apps?
Personally I'm focused on using JSON (and not XML) and I try to make it the less verbose I can. But I'm probably missing a lot of things.
I'm a web designer by nature, accustomed to changing resolutions and font sizes, but I'm unsure how to design for the Android platform without knowledge of screen sizes, especially when the screen rotates from portrait mode to landscape.
Should I just do generic things that tile, or is there a way to design things of static size?
By this, I mean for the GUI and graphics, not element nodes of the XML.
This was working fine when I first started the project. I am referring to editing/adding to the strings.xml file. It used to display a design and XML tab that allowed me to update it. now its just showing up as a table. Any ideas? I don't understand how I could have messed this up. I did check in another project of mine and I am getting the same results so I don't think it has anything to do with the XML.
Any ideas? Thanks!
Does anybody know of an IRC app that's in development for android?
View 3 Replies View RelatedThe documentation on Google's websites is great, but it would also be great to have a text to carry around. Are there any *good* books on programming in Android yet?
View 8 Replies View RelatedI like the idea of the Alliance, it is very logical. It raises a question for me though. How do they intend to run apps seamlessly across multiple operating systems? Will the apps all have to be developed in something like Java? I am studying mobile app development, targeting the Android OS, and using Java. I was about to order a load of books(eg hello android) on developing apps for Android today, but I worry the new Alliance platform/technology might render these books and my initial studies obsolete in some way.
View 3 Replies View RelatedCan any body tell me the official or un official API for android Phone Development, accessing gmail on mobile phones.?
View 2 Replies View RelatedShould I use 32-bit Eclipse or 64-bit Eclipse for Android development? I'm on a MacBook Pro (Core 2 Duo). Does it matter which version for Android coding?
View 3 Replies View RelatedCan you use Visual Studio for Android Development?
If so how would you set the android SDK instead of .NET framework and are there any special settings or configuration?
I have read http://stackoverflow.com/questions/1644/what-good-technology-podcasts-are-out-there, and other related questions, but I have not found anything Android-specific.
Does anybody listen to any such podcast? Want to recommend it?
I built my own car mount and want to get your opinions on it. I wanted to design myself because I REALLY didn't want another thing sticking off my windshield or out of a cup holder. This a the 2nd version of it and I am already planing the next version to be a solid black Plexiglas instead of the clear. I didn't count on the tape I used to be gray. Take a look and let me know what you guys think.
View 6 Replies View RelatedLot's of talk about the speaker volume/tone on the Droid X.
I too am a bit concerned with the speaker volume and tone on my Droid X.
I did a test. Droid X vs. Garmin Nuvi GPS - Google Nav vs. Garmin built in maps.
I plotted a route across town and fired up both units in my car. I turned on my car radio. I started to drive.
Results:
1. The Garmin was louder and clearer than the Droid X when speaking turn by turn instructions.
2. The Garmin was loud enough while listening to the radio.
3. The Droid X was not loud enough to be heard over the radio(volume set to max).
I don't want to plug my Droid X into the AUX on the radio because I then lose use of the radio.
Is this a hardware issue in the Droid X or something that can be fixed by a software update?
Is it possible to implement the Model-View-Controller pattern in Java for Android? Or is it already implemented through Activities? Or is there a better way to implement the MVC pattern for Android?
View 4 Replies View RelatedCan i change the media volume? and how? I used this so far:
setVolumeControlStream(AudioManager.STREAM_MUSIC);
But have a seekbar and want to change the media volume not ringervol.
So can someone show me how to just change the media volume at onCreate() and i fix the seekbar later.
I am quiet new in the field of Android please anyone tell me that how should i install the sdk of Android..
View 2 Replies View RelatedIn my app is the ability to read a file.
This works perfectly, but there's a problem.
No line breaks or whatever they are called get added when I append the file's contents to my big EditText, so this:code...
How can I stop this and make it appear in the EditText as it appears in the file?