Android :: Sharing Elements Between Applications
Jun 10, 2010
Here's a quote from Android's Dev Guide: A central feature of Android is that one application can make use of elements of other applications (provided those applications permit it). For example, if your application needs to display a scrolling list of images and another application has developed a suitable scroller and made it available to others, you can call upon that scroller to do the work, rather than develop your own. Isn't it a bad practice to make an app dependent on other apps?
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May 15, 2009
Anybody knows if we can share databases between applications? How can I access to a database from an A application to another B application? It is possible? What URI I would have to put?
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Sep 1, 2009
I have two applications in the field that share the same sharedUserid.What I just found out was that there is a bug in Android, where un- installing one application removes permissions from the other application also - thereby rendering the other application useless. Looks like this bug has been reported before : http://code.google.com/p/android/issues/detail?id=2773 This is a critical bug.Is there a workaround or a tool that can be provided to the user to recover back to a working version. Un-installing and re-installing the the application to start from scratch is not a acceptable option for our users,they stand to lose a lot of valuable data.
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Aug 11, 2009
What's the most convenient way to share a database across applications? For example, I want my application's dbadapter to query the android's native contact database so when a contact on the phone is deleted, similarly that contact is removed from my application. Should i use an attach statement to attach the table? Or would the better/more secure approach be to create a custom contentprovider query onCreate of my app to verify all contacts in my application still reside on the Contacts.db.
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Jul 24, 2010
I want to create a "main" service/application which will provide different functionalities to other applications. According to android docs I can use elements from an application/ service in other. "A central feature of Android is that one application can make use of elements of other applications (provided those applications permit it). ...". There is any examples/documentation on this direction? TicTacToeMain/TicTacToeLib example is not helping me because it seems "TicTacToeLib" will be embedded in final TicTacToeMain apk file. Also I want to ask if is possible to detect if "main" service/ application is missing (if is missing I want to tell user to install it, or to install it automatically).
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Aug 26, 2010
I have ten, possibly more, apps I'm developing that all share logic. 50-75% of the logic is the same - perfect for some time of library or code sharing. However, after reading the posts here and trying to share code in Eclipse, I'm not sure that's going to work. I tried going to project -> properties -> build path -> link source and adding the src and gen folders of the project with the shared code and then importing the classes I need. That seems to work in the IDE, but gives an error during runtime: class not found. This seems to be a common error for people attempting this.
I am slowly deciding that shared code is not the best approach in this scenario. Android doesn't seem to work well with this type of code sharing. For one thing resources are not packed in libraries, but references (R.whatever) must exist so as not to create errors. This can be designed around, but the effort and headache is probably worse than simply creating multiple copies. My experience seems typical, based on what I've read. Is it? Have you experienced success or failure with sharing code and/or custom libraries? Am I off-base in thinking that multiple code copies will be smoother sailing than fighting the shared code approach?
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Jun 2, 2009
I am working on developing several individual android applications. We had created common UI Layout View XMLs, classes and resources. I would like to share these common layout xml, classes and resources across all of my android applications. I dont want to duplicate them in my applications. Is there any easy way to do this?
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Sep 30, 2010
Come one, come all -- let's gather and act shocked, shall we? It's no secret that Google's Android Market is far easier to penetrate than Apple's App Store, which is most definitely a double-edged sword. On one hand, you aren't stuck waiting a lifetime for Apple to approve a perfectly sound app; on the other, you may end up accidentally downloading some Nazi themes that scar you for life. A curious team of scientists from Intel Labs, Penn State and Duke University recently utilized a so-called TaintDroid extension in order to log and monitor the actions of 30 Android apps -- 30 that were picked from the 358 most popular. Their findings? That half of their sample (15, if you're rusty in the math department) shared location information and / or other unique identifiers (IMEI numbers, phone numbers, SIM numbers, etc.) with advertisers. Making matters worse, those 15 didn't actually inform end-users that data was being shared, and some of 'em beamed out information while applications were dormant. Unfortunately for us all, the researchers didn't bother to rat out the 15 evil apps mentioned here, so good luck resting easy knowing that your library of popular apps could be spying on you right now.
Update: A Google spokesperson pinged up with an official response to the study, and you can peek it after the break.Update 2: Looks as if the full study (PDF) has been outed, with the 30 total apps named. Here they are: The Weather Channel, Cestos, Solitaire, Movies, Babble, Manga Browser, Bump, Wertago, Antivirus, ABC - Animals, Traffic Jam, Hearts, Blackjack, Horoscope, 3001 Wisdom Quotes Lite, Yellow Pages, Dastelefonbuch, Astrid, BBC News Live Stream, Ringtones, Layer, Knocking, Barcode Scanner, Coupons, Trapster, Spongebob Slide, ProBasketBall, MySpace, ixMAT, and Evernote.
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Sep 19, 2012
I have my Google account also setup on my wife's phone so we can share purchased apps. However, everything else is shared too. For example, even though I have sync for everything on my account turned off, my calendar still showed up on my wife's phone until I disabled it in the calendar app. Also, I can't remove my Google Talk account from her phone so my messages show up on her phone.
This is on a pair of stock Samsung Galaxy S3 phones.
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Nov 10, 2010
I'm trying to modify two TextViews in exactly the same way. I thought I can give them same id and with findViewById() and setText() methods change those TextViews in two lines. But it seems only one TextView is changed.Is there a way to do this?Or I have to make different ids for every element, get every element by findViewById() method and set it's text?
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Aug 23, 2010
I could not get any inner elements during the xml parsing. looks like parser see only outer tag A. Could you show me error?
CODE:.......................
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Apr 25, 2009
Just wonder what limitations there are for UI elements in AppWidgets? I tried a ListView and was met with an error. I saw the other post that EditText isn't available.Just wondering if there was a full list somewhere?
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Jun 1, 2010
I'm having trouble positioning the layout elements. The AutoComplete in my TableLayout and the button after it are expanding the TableRow larger than the width of the screen. Anyone have an idea why? Below is my XML code as well as a picture of the problem...
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Sep 1, 2010
In my application I change layouts very frequently with most of the user interactions. Each time when a new layout is drawn, the applications memory size is increasing. I can see this in DDMS. This is absolutely fine. I have analyzed my application with memory analyze tool and it shows that there around 42 Table layouts at some point of time and this number increase as user does more interactions with the app. Now my question is why doesn't the GC collect the stale layout objects. Does GC collect on UI widgets also??? I feel it does but can any one tell me what may be the reason for GC not collecting my UI elements.
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Feb 3, 2010
I need to add some parts of my UI programmatically. I'm doing this because I need to set the ids of some elements up in such a way that they can be easily access in a for loop. So far I have this xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/attr_row" android:layout_width="fill_parent"
android:layout_height="wrap_content"> <EditText android:id="@+id/attr_name"
android:hint="Attribute" android:layout_width="0dip" android:layout_weight="2"
android:layout_height="wrap_content" android:inputType="textPersonName" />
<EditText android:id="@+id/attr_val" android:hint="Value"
android:layout_width="0dip" android:layout_weight="3"
android:layout_height="wrap_content" android:inputType="textPersonName" />
<ImageButton android:id="@+id/drop_attr" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:background="@drawable/btn_delete_states"
android:layout_gravity="center_vertical" /> </LinearLayout>
At the moment, I inflate this xml five times like so:
for (int i = 0; i<5; i++) { LinearLayout attrList = (LinearLayout) findViewById (R.id.attr_list);
LayoutInflater inflater = getLayoutInflater();
View row = inflater.inflate(R.layout.attr_row, null);
LinearLayout extraAttr = (LinearLayout) row.findViewById (R.id.attr_row);
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
attrList.addView(extraAttr, i, params); }
The link below shows two pictures - the layout hierarchy and the result in the emulator. http://picasaweb.google.com/bengoldcross/Android?authkey=Gv1sRgCJ785I...
As can be seen, the xml is inflated five times successfully but only one is actually displayed. Inspecting the hierarchy viewer a bit more explains why. The layout being displayed is at location x=0 y=111 all the others are being rendered at x=320 y=111. It would appear they are being displayed a) off screen and b) on top of each other. So, why are they and how do I stop it from happening?
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Oct 1, 2010
I was wandering if there was a easy way to do the following without android layout
place an image central top
place a button center center
place a button left bottom
place a button right bottom
it doesn't sound that difficult no ?
well I can't figure out a way to place the elements as I want using stupid xml layout.
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Aug 5, 2010
I have a database filled with records in the following format: . What I want my application to do is select records from an external database, and display those records on the phone screen using a SurfaceView.
Currently, I have an Activity, and a Service responsible for the record-gathering portion of the application. The Activity passes an intent to the Service, and the Service responds by returning the records that need to be displayed. The records are stored in my program as instances of the Data class, and merely have the screen-coordinates of where the element should be drawn in the View (I am just drawing a circle for every record in the DB).
For the sake of brevity, I won't include the service but I will include a skeleton of the Activity class and the Data that I wish to display.
CODE:.................
The problem that I am having pertains to the SurfaceView. I realize that many people are going to suggest that I use just a regular View, but my application involves a lot of elements, so a SurfaceView would be much more suitable for my needs. Below is a skeleton of my SurfaceView class that contains a nested class to manage the threads.
CODE:............
The problem that I'm having is that once I make the initial call to the Panel class, I'm going to be getting new records from the service, and consequently, my Info Map data-structure is going to get updated. However, my Panel class just gets stuck in a loop and never receives any new Data objects. All examples of SurfaceViews I've found have involved updating them methods within the SurfaceView class itself (e.g. touching the screen and creating a new image, etc.) Sadly, I'm stumped on this particular problem. Is there a better approach for designing my Activity/SurfaceView interaction? Is an additional View required?
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Mar 9, 2009
From http://d.android.com/guide/topics/ui/declaring-layout.html, it said "Instantiate layout elements at runtime. Your application can create View and ViewGroup objects (and manipulate their properties) programmatically."
Can you please tell me how/where I can find example for that?
For example, how can I convert the following layout into Java code of my MyWidget. So that when I put "<MyWidget...>" in my layout xml file, it will automatically build a Gallery inside the MyWidget? code...
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Sep 2, 2009
This is probably a very "newbie" question as I'm relatively new to the android sdk, but figured this would be good place to ask.
Say you have a layout with several textviews that all have sequential IDs (ie, tBox1, tBox2, tBox3, etc).Is it possible to reference each box in a loop? Something like:
do { iCount++; View tvBox1 = findViewById(R.id.tBox[iCount]); }
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Oct 13, 2010
I am trying to send a list of objects from an android mobile phone app to a j2ee webserver.
I create json objects and then put the objects into an jsonarray(in an order) and then send it. I am able to receive the jsonarray on the server, obtain the objects individually too, but the order of how I inserted the objects into the jsonarray is different compared to the order present in the received array. The order of elements plays a crucial role in my data processing. Could somebody please tell me a workaround for this.
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Jun 12, 2010
There's a webpage I pull up with webview, however i'd like to hide the 1 text link at the top. Is there a way to do this? The link is in the body, so I can't hide the body element in whole.
The webpage is all text, and one tiny image at the bottom, but the text is generated each time you load it, so I can't just copy/paste the body.
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Jun 27, 2010
When I have a ListActivity and an Adapter how does Android handle a list with 200 elements.
Does it try to load all of them directly how does it wait till the user scrolls and then renders those elements?
Do I have to worry with performance when a list is too long?
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Jul 8, 2010
Is there any way to set my sliding drawer on top of other elements in my layout? I have an ImageView which is intended for an album art and I would like to have a sliding drawer overlay at the bottom of that ImageView.
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Mar 4, 2010
Is possible to have a separator between elements of a GridView?
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Feb 17, 2010
In my application by using web service i get the data from database and stored that data in hash table.I took that data from hast table to array.this array data can be displayed in button.My array contains 10 elements.For animation i used view flipper.Now i want to do is display that array elements on button one after another for every 10sec.But in Updater method i didn't get all array elements.How to solve this one
I am sending my code:.......................
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Jun 18, 2009
I would like to create a user interface which would contain network indication icons (3G, WiFi...) and I would like to use existing graphic elements which are displayed in notification bar.
Does anyone know how to get these existing elements and use it in custom layout?
I guess these icons are all ImageView elements and I am wondering whether it is possible to retrieve them with findViewById() method...
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May 22, 2009
I'm using the new SDK 1.5, and I'm trying to add some elements to a layout in eclipse.When I click the green plus symbol, the dialog pops up, but it doesn't populate with anything to choose from.
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Oct 12, 2009
I have an android activity, with two elements:
EditText
ListView
When my activity starts, the EditText immediately has input focus (flashing cursor). I don't want any control to have input focus at startup. Stop EditText from gaining focus at Activity startup? I tried:
EditText.setSelected(false);
No luck. How can I convince the EditText to not select itself when the Activity starts?
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Feb 7, 2010
I have a vertical LinearLayout that contains a custom View that I've defined in my app and and a TextView. I'd like my custom View to be aligned on the top of the screen and the TextView to be aligned at the bottom of the screen. Unfortunately, no matter what changes I make to the attributes of the XML file, my custom View always seems to be centered vertically when I run the emulator. The xml is like the following:
<LinearLayout.............
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Oct 16, 2010
I need an advice. What is the best way to implement in android a list of such UI elements (see the ref)A list contains a lot of such elements (about 30-40). I'm using now relative layout and 4 text fields and I think it isn't a good way.I think it's too heavy (full list will contain: 30 relative layouts and 30*5 = 150 text fields).
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