Android :: How Best To Implement A Cohesive Model Layer For MVC Apps?
May 4, 2010
I'm pretty new to Android and Java, though I've really been excited about what I've learned so far. I'm a little uncertain though on how to implement the Model layer.I come from a background in PHP web applications with Zend Framework and the like. I'm used to having an ORM component, through which the Model maps to a database. I haven't really seen anything like this yet for Android, although it's possible I've just not looked hard enough.Are there any good tutorials, articles, 3rd party libraries, etc. that specifically address setting up your Model layer for Android apps?
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Sep 12, 2010
How to implement a layer above a layout? like this pic: http://ss12.sinaimg.cn/orignal/5d8cb30ag8f47eca43a5b&690
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Aug 2, 2012
how can we implement the tiled layer (java net beans) in android?does we use open gl for this?
is that called "texture" or "wallpaper" or ...?
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May 25, 2009
I'm starting my first Android Application and I'm trying to figure out the best way to implement an RPC layer to communicate with my Tomcat server. Basically, I've got POJOs on the Android Client and on the Server. I simply would like to seserialize the POJOs on Android, send up an HTTP Post, deserialize on the server, do some work, then serialize a POJO response back down to the client. I've seen a number of posts referencing JSON and XML but nothing really definitive.
Further clouding the matter is the different Android SDKs out there that seem to have different levels of support for each. Obviously, if Android has a native library that works well, I'd like to use that. Additionally, I'd like something that could work with my existing POJOs without a great deal of trouble. What are the best practices for this sort of thing? Can anyone send me to any tutorials that have some solid examples on how to get this implemented and going?
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Dec 21, 2009
Ok so I know many are having battery issues. You, like me, probably have more battery life than you think. This is because the application layer of the phone is not receiving the hardware layer's data correctly (hold talk button, end call button, and middle button upon starting up your turned-off phone, this boots in test mode which shows you hardware layer battery power, aka the correct battery life estimate). It's causing another problem because some applications can't be run when the phone THINKS it's about to die.
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Nov 9, 2010
I have a service that will send out notifications with timed tasks. I need this service to run outside the life of the application, but I only need to access the services functions during the lifespan of the app. Is a local service enough or do I need to implement AIDL?
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Mar 21, 2010
I have tried to figure out a way of exposing(sharing) data between a master application and slave application in a secure way (not world readable), but couldn't find clues on how to do that practically. Of course, reading articles outline that ContentProviders are for sharing persistent data, but I can't find a working example, nor the information how to setup/implement two working piece of software that can work together as different apps.The data I share is simple - ID & Data.If there's anyone that already achieved this already,
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Jul 15, 2010
What's the best way to implement an Android Market-like tabbar (Apps/Games/Downloads)?
It would be great if I could use TabHost, but I believe it doesn't allow this level of customization.
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May 16, 2011
I have tried using App2Market to let the Eclipse read the app but it can't. Is there any way to make this done ?
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Aug 16, 2010
I've got a standard RelativeLayout laying out my Buttons and TextAreas. What I want to do now is be able to draw various sparks, flying cows etc. at arbitrary places on the screen on top of the whole thing. What's the best way to do this? Should I override onDraw() on the containing View and draw after calling super.onDraw()? Or is there some better way of drawing a layer on top?
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Jun 24, 2010
just got my incredible today which btw I am loving it. However I have run into an annoying issue, Layer Reality will not install. I downloaded the app from the Android store and while it appears in my download list completed it will not install saying (download unsucessfull) after around 2 seconds or so. I am really wanting to check this app out.
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Jun 23, 2009
I have a GIS layer, that holds information about some areas. It is basically a rating for a specic area. So each shape defines a specific rating. I would like to be able to add this layer to Google Maps and then in my Google Android phone be able to open a little application that just shows that rating based on your current location as a big number on the screen. I am fairly new to Android development, so I don't know the Google Maps API that well yet. I would be very happy for any pointers in the right direction and even happier if anyone could present an example.
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Oct 18, 2010
If I draw a round rect shape by code I can use setShadowLayer to get a shadow drawn for the shape. Is there an equivalent when defining shapes in XML?The following example draws a round rect background to a shape. What would I need to add to get a shadow added to the shape? Is it even possible using XML? Code...
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Sep 30, 2010
Does someone tell me what is application and middle layer in android. I have to know details these 2 layers and about linux kernal and how is related to android.
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Dec 30, 2009
I dont know wether this is the right place to post this, but I had a great idea for a implementation of Contacts within google maps. Maybe it is already possible or someone already is developing this, but here it is: Add a selectable Layer to the Google Maps on the Android system that integrates with the Contacts list and shows them in Google Maps. Only contacts with an adress can be shown in Maps and have to be in a certain format ofcourse. Also, you have entered a contact's adress information, from the Contact's menu with 'Call' and 'Text you should be able to use 'Navigate to', which is a Google Maps route from your current location to this person's house.
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Jun 21, 2010
I have a few already written C libraries which i want to embed into the library layer of the android architecture at the same level as the already existing libraries such as libc etc.... i dont want to insert it as .jar packages at the application or framework layer. is that possible.
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Feb 9, 2009
I am working on a device that uses dns names and IP addresses to make calls. This is not phone device. We are planning to replace the RIL layer bottom end to talk to our own call backend that accepts IP addresses. When I invoke a ACTION_CALL intent with a dns name, I see the Phone app coming up and changing the dns name into a phone number. Is there any option to turn that behavior off? Basically the phone app passes whatever string I passed all the way to RIL layer as is without mangling it.
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Mar 29, 2010
i want set my footer at the top layer of my app. it should not have any shakes and moves while the activity navigation or showing up the keyboard. it should always settled in the bottom of the screen. how to do that?
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Nov 1, 2009
So I heard on NPR today that I can use my android phone to track where the money from the Stimulus package (ARRA) is going. I googled it, and came up with this info:
Sunlight Labs: Blog - Recovery.gov Augmented Reality Mashup
Layar App Maps Stimulus Money Onto The World Around You
I search on layar for "recovery" or "sunlight", but I don't get anything. Anyone else get this working?
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Apr 13, 2010
I want to create a communication layer in android. The layer will communicate with server asynchronously. Multiple activities should be able to call methods of the communication layer. The layer will get messages from the server (it is not important for the scope of this question how) and should be able to tell activities to do some work based on these messages.
How should I implement this? Should I do this using android Service?
The main questions that I need to answer are: How can activities access the layer? How can the layer access activities? How can i make the communication layer live for the lifetime of the application?
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Jan 20, 2010
Is there any Java ME compatibility layer for Android, which makes porting Java ME (aka. J2ME) applications easier? I mean a third party class library which redirects calls to internal Android API.
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May 11, 2010
Analogue to this one (http://stackoverflow.com/questions/2788345/replacing-xml-in-file-from-document-in-java or http://www.exampledepot.com/egs/javax.xml.transform/WriteDom.html) I try to use it under Android. The problem is, that I can't use the suggested solution under android, because it throws java.lang.verifyError. After reading a little bit, I found out, that the class that was used to store the data to file, is not usable in android. can you suggest another solution, which is similar easy to use?
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Aug 2, 2010
I have a widget that shows some data fetched from the Internet. I may have multiple widgets visible on the screen, each displaying some data, partly the same as the other widgets. From time to time I re-fetch the data from the Internet and update the widget views. I've modeled this in an MVC style: I have a model which I can invoke a "re-fetch-data" on, and which the views listen on. My questions:
A) Is it wise to let my model be a singleton?
B) Can I rely on that all widgets are served by the same AppWidgetProvider? Or may some of my widgets get served by a different AppWidgetProvider instance? Or, more generally: Is there any guarantee that there will be only one instance of my AppWidgetProvider? If there is only one instance of my AppWidgetProvider, then I could use an instance variable here for the model, and pass either my AppWidgetProvider or the model around where needed. Perhaps a better option?
C) In the AppWidgetProviders onUpdate method, can I be sure that the same "context" object is passed as argument each invocation?
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Aug 25, 2009
Google Map's traffic layer is working for my area on my G1. Really, really convenient to see how fast traffic is moving at a glance from my phone!
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Sep 22, 2009
Can a core class such as "AbsListView" access resources, such as xml files, and .png's, in a 3rd party app installed in the normal way (at the app level)?
I realize this is a change in framework code, and that is fine for my purposes. So, for example, if I know that I am going to install an app called "MyApp", could I go into frameworks/base/core/java/android/ widget/AbsListView.java and tell it to use an xml file and .png's that live in that app? Here is the line I would want to modify: setSelector(getResources().getDrawable( com.android.internal.R.drawable.list_selector_background));
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Jul 19, 2010
I read an article from the web on SL4A (which is also known as Android Scripting Environment). The site from where i got an article is: http://infoworld.com/d/developer-world/php-development-comes-google-android-652. But i got the theoretical knowledge only for SL4A (ASE). Anybody having practical idea or practical example, pleas suggest to me. Which are the scripting language supported by ASE? How do i download script?
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Sep 15, 2010
When I create a instance of the SQLiteOpenHelper, I always need a "Context" to be passed as its constructor's argument. To use this "Context", in my service layer class, I extends Activity class, though I do not display this activity on the screen because it is my service layer. I always get NullPointer exception when I open the SQLiteOpenHelper in my service layer class, Is it because my service layer class extends the Activity class but I did not show this activity on mobile screen? (That's there is no intent to my service layer class), if it is so, how to get rid of it if I wanna open a SQLiteOpenHelper in my service layer class which do not need to extends Activity, but need a Context object to pass to SQLiteOpenHelper?
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Mar 27, 2009
I wish to get the environment variable which is set by a daemon in native but failed. Some details: in the daemon, which is started by root setenv("MY_NAME", name, 1); in java code, which is started by system String name = System.getenv("MY_NAME);
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Nov 3, 2009
In my application i want to pass the camera data to native layer. what is the best possible approach for doing the same.
I know it can be done 2 ways.
1.start the camera in application and pass the preview data to native layer. But i feel this may consume lot of resources.
2.Start the camera directly in native layer and use it. So JNI will come less into picture. and not much resource loading also.But dont want to take any risk by using the lower layer code which may change in future.
Is there any other approach ? start the camera and tap the data in native layer. I think this wont be proper approach, Can any one suggest ?
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Aug 31, 2010
How do I find the make and model of an Android device?
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