Android : Re-Teaching Myself To Program - Seeking Object Oriented Design Books
Oct 13, 2010
Five years ago I used to program in SAS. Since then I've been doing software QA of various types. Mostly manual (video games + web apps) testing with a tiny bit of automation.
I'd really like to shift careers back into programming. Specifically the Android platform has caught my attention. These are the books I've been reading and working through.
Learning Java, Third Edition - O'Reilly
Beginning Android 2 - Mark Murphy
Hello, Android - Ed Burnette
However, I think I need something that looks at programming from a less language dependent standpoint. Something that takes a bird's eye view if that makes sense.
It's very easy to see how particular functions work, but I'm looking to get a better sense of how all the pieces fit together. How does one split up an app into individual classes and packages? Do I have a method in main that shuffles my deck of cards (object) or does the class deck of cards have a method I can call to shuffle itself?
I think I'm looking for a book on object oriented design? I've also been working through the tutorials and examples at http://developer.android.com/resources/index.html and also in the three books I've been reading so far. Maybe I just need to spend more time coding though?
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Oct 7, 2010
I'm fairly new to object-oriented programming, and I'm really interested in learning it correctly. My problem is this:I am trying to create a TabActivity which plots the user's data over time in each tab's content. Then only thing the tabs are going to control is the timespan of the graph. (i.e. one tab for 'past year', one for 'past month', one for 'all time', etc). As you can see, the layout used for each tab will be identical. The code used for each tab will only differ by a couple lines... (the starting and ending date of the x-axis).
I'm not sure how I can pull this off in a well-designed, object-o fashion. Any ideas?
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Aug 19, 2010
How can I have a portrait-oriented menu in my lanscape-oriented view in Android?
I'm building an application with some items that must be landscape-oriented. Everything else (menu, view for editing the item, list of item...) should change orientation according to the orientation of the device. To do that I set android:screenOrientation="landscape" in the AndroidManifest.xml for the activity showing my items. Now, how can I create a portrait-oriented menu for that activity?
I'm also wondering if setting the screen orientation of the activity is the only way? Isn't it possible to set the screenOrientation for each view?
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Oct 29, 2010
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).
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Jan 27, 2014
I have a problem on my Asus ME301T tablet with the Play Books app (I'm running android 4.2). Regular text based books work just fine, however, comic books show as blank pages. Sometimes it will load a few pages if I rotate the screen a few times.
I've tried to reinstall the app and redownload the comics without luck. It works fine on my Samsung i9000 running android 4.3.
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Nov 24, 2009
Being a geek, I've been very interested in getting a Droid, and in anticipation, have been following this forum since day one.I've been to the Verizon store a few times to play with the Droid, and was comparing it to the Eris today when an employee came over and started chatting with me.He had a Droid, so I asked him how he liked it, etc, etc. I mentioned how I knew quite a bit about the device just from reading up on it online. I asked him about the keyboard, and what his take was.He mentioned the lack of raised keys, etc., and then said his main complaint was that there was no way to 'lock' the Alt key so he could type numbers - and he proceeded to show me how you had to hold the Alt key down, and type with the other hand.Then I mentioned to him that I thought all you needed to do was double-tap the alt key to lock it. He did that and was amazed that it was that simple, and thanked me for the tip.Perhaps this forum should be mandatory reading for all Verizon employees?
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May 3, 2010
Is there an alternative to the HTC Sense People widget? Basically, I like it, but I would prefer it to be horizontally oriented, instead of the 2 modes available - Vertical and Full Screen
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Sep 21, 2010
What would be the best way to implement Aspect-oriented programming (AOP) in an Android application?
Would it be efficient with the mobile battery?
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Mar 27, 2009
I'm writing a content provider that returns data about game sessions. This data comes from an SQLite table. However, the client that consumes it will also want summary data: total wins, current/best winning streak, and so on. I'm not sure which approach to use.
* Possible Approach 1: Do nothing, let the client calculate what it needs.
The client could step through the whole table and calculate statistics itself. However, it's inefficient to send the entire database over the content provider link if the client only wants the summaries; this may also be prone to bugs because each client has to reimplement the summary calculations.
* Possible Approach 2: Separate content URIs for summary data.
The client could ask for a URI like content://myapp/summary/totalwins and get back a text/plain stream containing the number of wins. This seems like a big hassle to implement on both ends, though. Or it could ask for a URI like content://myapp/summary and get back an XML stream containing all the summary data, but this isn't much simpler.
* Possible Approach 3: A phony table.
The client could ask for a URI like content://myapp/summary and get back a cursor over a single row, with each summary value having its own column. This would not be an SQLite cursor but a custom in-memory cursor. It seems a little unnatural to use a table metaphor when there's always exactly one row, though.
* Possible Approach 4: The extras bundle.
Cursor has a getExtras() method that returns a bundle. The client could make a request for the main URI, content://myapp/sessions, and then just look at the extras bundle instead of reading any rows. However, there's no setExtras() method, so I'm stuck with whatever bundle object SQLite puts in there - and if it's Bundle.EMPTY, I'm out of luck.
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Sep 9, 2009
I want to do some automated testcase with Instrumentation . Suggest that my AUT has 2 Activity. After clicking the button in ther first Activity, the second one will be shown with new content base on what we enter in the first Activity.) Instrumentation provides us the function called startActivitySync() and return the Activity object for processing. My question is how we can get the pointer of the second Activity after the it is shown by clicking the button on the first activity.?
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Jun 8, 2009
I would like to convert a Picture object to Bitmap object in memory, without writing data to disk.
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Aug 23, 2010
I am very new to androids n want to know more abt t. pls give me informations abt SDK ,JDK,, eclipse etc n why they r used? how do i install n use tat pls posts links to videos.
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Nov 23, 2010
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 !
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Dec 3, 2009
This to all those who are into game development. i want to start on the game development in android, and just as a starter, can anyone suggest me an ebook or a simple procedure oriented blog or some link that'll help me to get things started.
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Sep 29, 2010
create or has in the past created an app for android. I have a very good idea, that ide like to put to work, and cannot do it because I dont know how. Also dont know if this is the right section really. If this works, or can work, it might revolutionize, lets say, Blackberry to Android and vice versa, messaging.
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Sep 21, 2009
I have an Activity that running on system. I can get the Intent that is used to start the activity. But i don't know how to get the Activity object from the Intent object or something else. Can anyone tell me how to do this??? Note that, I don't use Instrumentation object.
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Jan 29, 2009
I've been using androids MediaPlayer to stream from an http url and have a question about seeking. Currently, our urls expire after they have been used once or a certain time out has expired to dissuade scraping content. Now, this obviously makes progressive streaming past the buffer impossible with the exact same url as you need to open a new http connection with the same mangled key, which we intentionally don't allow.
However, MediaPlayer seems to do this when seeking before the current position (i.e. seeking from 1:00 in the audio to 0:30). As the file has already been downloaded up to the current position I'm confused as to why MediaPlayer is still trying to initate a new http connection in this case? The only thing I can think of is that MediaPlayer is getting rid of audio its already played up to the current position, and hence needs to restart the connection if you try to seek back on the stream. Is this correct, or is there something else going on?
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Oct 31, 2009
An error that appeared in my Flurry logs but seemed impossible to reproduce otherwise just occured That's the good news.The bad news is that the LogCat info is not telling me enough.I would appreciate a second set of eyes taking a look and offering wisdom.The lead up is that I was playing with my app, and put it away for a while. I did a lot of other things with my phone since, like making phone calls, etc I hooked up my phone to the computer to make another attempt to find the mystery bug, and decided to see if anything weird appeared in the logs from earlier.I then brought my app to the foreground using the Home/Hold technique and whamo the bug appeared before my eyes in LogCat.
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Aug 26, 2010
I've tried BeamReader Pro/paid, QuickOffice free and Adobe's Android Acrobat Reader. All have problems.
Acrobat Reader and QuickOffice free do not have the ability to search a PDF.
BeamReader Pro can search a document, but won't make use of an embedded index, so searches are slow, even on pre-indexed PDFs.
BeamReader looses its mind when you switch from portrait to landscape.
Acrobat Reader and QuickOffice recognize phone numbers in PDFs, so you can tap to dial them on Android, but BeamReader Pro does not.
I am very disappointed with all of the above. Is there anything better? I see that there is a US$9.99 paid version of QuickOffice, but the description does not mention capabilities pertaining to PDFs.
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Feb 3, 2009
I'm a mobile media product developer at a major media company in New York City, and we are looking for a vendor with experience in Android, web apps, and mobile in general. I understand Android is new, but if you've got something out there to see already, that would really help. Please reply with a brief description of your Android experience and a link or a word about yourself and your company.
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Sep 12, 2010
I'm looking for constructive feedback about a game I developed, iA Soccer/Football. I've only been able to test on a Nexus 1, and would really like feedback from people who can test the game on other models. If you reply to this thread, please let me know which phone model you're using. Thanks! NOTE: THIS GAME IS ONLY FOR ANDROID 2.1 OR HIGHER.
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Jun 6, 2010
Alright I sifted though all the root/upgrade threads only to find myself confused so I apologize for the possibly common question but I seek clarification.
Some months back when I got my HTC Eris I installed a 2.1 leak and rooted it. Not 100% sure but I believe it was Version 2. I used these instructions:
Now that the official 2.1 is out I want to switch to it and root it again. I started looking at the pinned threads only to realize that depending on how and what one installed on ones phone it may or may not be possible and instruction vary.
Can someone point me to the set of instructions that apply to my case or confirm that I am out of luck. If you need some firmware build code etc from my phone to make an accurate recommendation I would be happy to provide the information.
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Aug 2, 2010
I'm sorry for being a newbie with all this root stuff, but I've been searching and haven't been able to find a "set" guideline on what to do with my just-rooted Eris. So I've gotten my phone rooted with the DUMMIES phone-only guide and rom'ed with Evil Eris 4.0, but I don't know what exact measures to take from there to install Engtools, OC, flash new roms, etc. I just want to be careful with everything in order to have the best possible root experience D: Basically, I don't know what "pushing" is and how it's done. I think the first thing I want to do is install Engtools, following this:
http://androidforums.com/all-things-root-eris/121597-how-install-engineering-bootloader.html
But, is amon's recovery already installed from the dummies phone-only root? Do I just vol-up+power-on when the phone is off to start it up? After that, what do I do with the codes? How do I push?
Also, after pushing all these files and getting Engtools installed, do I start OC'ing and whatnot? What do people normally do after rooting for performance improvements and other handy-dandy things?
Finally, how do I switch to a different ROM? Do I have to undo one ROM first?
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Feb 18, 2009
I am trying to get a FileInputStream object on an image that the user selects from the picture gallery.
This is the android URI returned by android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI content://media/external/images/media/3
When I try to construct a java URI object from this object, I get an IllegalArgumentException with the exception description Expected file scheme in URI: content://media/external/images/media/3 whereas the android URI shows the scheme as content
Never found a solution for the original question. But if you want the byte stream of an image in the pictures gallery, this piece of code will do that.
CODE:...................
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Jun 21, 2010
New to Android; very grateful for the help! I tried searching the web and other threads but the words "free", "ebook" and "library" return thousands of results that don't help. Supposedly at my library you can get books in ebook form. The website says they are compatible with my PC, the Nook and the Sony devices. Is there a way to read these on the Android and if so, how is that accomplished? Also, I read that you can read Google books on Android phones, but when I got to Opera on my phone and go to books.google.com/m and click on a book nothing happens.
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Oct 21, 2010
There are many books in the Android Market that I'd like to buy for my Aldiko reader, but I need to know that there's a good way to back them up. I used my ES File Manager to look for the books but there is no ebook folder or aldiko folder. These are drm-free books.
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Oct 24, 2010
Does anyone know why my downloaded MP3 audio books (from the library), downloaded with Overdrive Media, does not have sound? Sometimes the sound will come on and sometimes it won't. So frustrating.
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May 19, 2010
I am not allowed to post more than one hyperlink. But Amazon carries this book as well. I am picking these two books because of another popular thread saying I should have an Android book and a java reference but no one mentioned a book for either. I figured I'd go with the highest rated in for each of those criteria.I didn't know if I could ask a question in the same thread about what books so I figured it was better to start a new one. Code...
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Sep 22, 2010
I've been looking into Android development, and while I understand the concepts, all of the Java stuff goes right over my head. XML is easy to pick up on, but I quickly found out that advanced Android development is simply not possible without a good understanding of Java. I looked at this book and it seems pretty good: http://www.amazon.com/Java-Tutorial-Short-Course-Basics/dp/0321334205. Is this good material for a true beginner, or will it be a little too advanced? I need something that will start out very slowly and explain the concepts, ideas and functions clearly. The last thing I want is a book that's incredibly complex and hard on a beginner. I have absolutely NO knowledge of Java or any coding, so I need to start with the basics. Is Android Java a lot different than regular Java? I know there are some differences, but if I studied regular Java could I quickly relate that to Android? I wouldn't want to read a Java book then get back into Android and be lost due to the changes. With this in mind please recommend me some books. I'm very enthusiastic about Android and have brilliant ideas for applications. I just need the prerequisites for Android before I can go full force.
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Feb 9, 2009
I didn't see this posted anywhere here and thought it was cool. For those of you that like to read. (I totally copy and pasted this from the Tmobile forum.)Google has launched a mobile version of its Book Search application which gives Android and iPhone users access to over 1.5 million out of copyright texts from authors including Austen, Dickens and Shakespeare. Google has optimised the texts for iPhone and Android handsets, and users will need an internet connection to view them. The texts are separated under handy categories including General Fiction and Mystery, and the service keeps a list of recently viewed eBooks and allows you to bookmark your page.
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