I don't exactly know how android updates the applications. As far as I've read around here it keeps the SQLite database. So, imagine this scenario: one application that uses SQLite database for persisting data. After a while I release v2 which contains some database changes and I need to update user data in database. How can I make this during the update process ?
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Any good source for writing NFC Tags. I am looking for information on writing tags that would have a menu and preform several different actions.
View 2 Replies View RelatedI need a database in which I can store data and get data whenever I need. Is this possible with android.preference package. I do not want to use sqlite database.
View 1 Replies View RelatedI'm in a trouble managing a spinner. I have a spinner with its adapter. I initialize the spinner with a list of values when starting my activity. Then I force the selected value to be the one used in the object that I manage.
Once the screen is initialized :
When the user selects a value in the spinner, according to the selected value, I may continue (or not) to another activity for let the user choose a complementary and necessary value.
If the user "cancels" this second activity, I want to rollback the spinner to its previous selected value, and cancel some actions made in the meantime.
If the user goes to the end of the second activity, everything is fine and I want juste to refresh the spinner display with the datas selected in the second activity (I overload the getView method in the adapter to do this).
Overall, I can easily do all of this, however, when I force the selected value in the spinner at the begining of my activity, or whene returning back from the second activity by "Cancel", the change value event is catched and the second activity is triggered (the user did not click anything at all).
How would you allow the second activity to be lauched only if the change of the selected value in the spinner is due to a manual action from the user, and prevent that same second activity to be launched when the value of spinner is changed "in the code "?
I tried many solutions, as setting a boolean into the adapter that tells if the next event will be raised because of an "in the code" action.
Or also putting a boolean in the adapter that tells if the adapter has initialised itself, and I force that boolean to true on the forst change catched event.
I would like to update my sql lite database with the native update-method of the SQLiteDatabase class of android.
CODE:.......
But i get following error:
CODE:....
I donīt know what should be the problem. Somehow the values do not arrive in the sql statement. I did nearly the same with the insert method and that worked quite fine.
Is possible update the records from SQLite from my Android Application1 from other Application2 Android
View 4 Replies View RelatedI've got a question about updating an app after release. If I have a database that contains 10 columns and I add a feature that requires an 11th column after the app has been released, where would I put the sql code to add the new column so that when they install the app it keeps their current data, but adds that 11th column? Is that even possible or would I need to create another table that references the first with a foreign key?
View 5 Replies View RelatedI update a value in my Database in a Listview using a Context Menu. The code so far seems to be ok. But everything i try to make the update visible in the View failed. Anyone can point me whats wrong there ? I use a ViewBinder to map the Layout for each row.Code...
View 7 Replies View RelatedGood morning everyone, I am new to programming with Java and Android, I'm trying to make an application to seek an xml in a web address and contains information that should be saved in my sql lite ... The doubt is as follows: I have to download and save the xml file on the device or can just work with it in memory, example: xml = xml.create (www.meusite.com.br / meuxml.xml); how would you do?
View 4 Replies View RelatedI have a main application, and a bunch of sub-applications (they are separate apps, which do not appear on the android home dashboard). I was planning on having a SQLite DB which the main app maintains, and get a list of available sub-apps from. Is there a way to update this main database as the user installs the sub-apps?
Two alternative I was thinking of include:
User installs the sub-apps via the main app, which would then update the DB.
Rather than use the DB to find all installed sub-apps, have each sub-app declare a category, and use intents to query for all applications which match that query (is this even possible?
I am implementing an android application and i can't figure out how to solve this problem : When user clicks to the update button , i want to connect to the my server and check if there is any update on the data , if there is , i want to get data from server and update the database.Should i use xml structure to check and get updates from server or is there any smarter ways to achieve this ?
View 1 Replies View RelatedI have an app which uses a large amount of data which has been compiled outside the app (on my main PC). The app is for my personal use so there are no complications with having to distribute data updates to other users. However, I am currently following a very convoluted and time-consuming procedure each time I want to update the data, and I wonder if anyone can suggest any ways to streamline it.
The procedure I follow whenever I want to add new data is as follows:
I enter the new data into a csv file which I maintain as the source of the relevant table in the database. I use SQLite Database Browser to import the data into an existing SQLite database. (This program does not seem to have the ability to append imported data into an existing table, so whenever a table needs updating I have to delete the existing table, then import data from the csv file into a new table, then manually edit the data types for all the fields in the table.)
I drag the icon for the database file onto the 'assets' folder of my project in Eclipse. I export the project from Eclipse as an apk file. I copy the apk file to my phone (using Astro File Manager) I uninstall the old version of the app and install the new apk.
when the app is run, code based on the example set out here copies the data from the 'assets' folder into the app's data folder; this means that each byte of data takes up two bytes in the phone's internal memory; at present this is not a problem, but could be as the volume of data grows; I wonder if there is a more memory-efficient method?
I currently facing problem where user have the choice to enter several working experience, where every working experience include several details (company name, duration, roles etc) I don't know how should I store it since users have the freedom to add as many working experience as they have.I have a table as below
private static final String DATABASE_CREATE_WORKEXP =
"create table workexp (work_id integer primary key, _id integer not null," +
"workcompany text, workduration text, workrole text, workskills text" +
"workproject text, worksalary integer, workreason text," +
"foreign key(_id) references user(_id));";
I have a problem while trying to insert / update and delete entries as company name can be duplicated. Any advice or suggestion? I'm glad to provide more info for you to help me.
I have a database that gets updated by a background thread. Is is possible for the UI ouput(using a listview) to change when a database entry is added/deleted? I've seen examples of using SimpleCursorAdapter and listViewAdapters and I'm not sure which to use and if it would even work.
I found an "efficient" listViewAdapter which would work great for me since it doesn't call findViewById often and I can change the data structure to hold exactly what I need, but I don't know how to hook it into my database adapter so it dynamically updates the output when there is a database change. Example: http://www.androidsnippets.org/snippets/125/
Given a Url for an image, I wanted to downoload it and paste it onto my canvas in android. How do I retrieve the image to my app ?
View 2 Replies View RelatedSo far it seems solid to me but it does seem like there is a delay when calling or receiving calls via Skype on the Droid. It seems like there might be a delay when receiving messages on Skype as well. Hows it perform on other android phones?
View 3 Replies View RelatedI am using scroller class for auto scroll of the text in edittext but after stopping the animation scrolling goes back to top of the text and i want it to stop at current position. How can i perform this task?
I am using this code for scrolling...
I want to use the Camera Image to get the google search results. I could not find a way to do that using Android API.
View 1 Replies View RelatedI have developed an Android app. Now I want to perform a few operations (i. e. - Reset the settings etc.. ) at the moment the app gets uninstalled from the phone. Is it possible to reigster a listener or a function that is called at the moment the app is removed?
View 2 Replies View RelatedI don't know how to elegantly solve the following task:
I have several blocks of code (operation) to execute. Each block can return true of false to indicate that further execution is possible. Inside of each block I have to use asyncronous methods calls (Because Android is completeley asynchronous).
Example of processing operations (not working now as expected):
CODE:.......
The problem is that inside of the operation I need, for example, display AlertDialog and wait for the input. But after I call dialog.show() my method execute finishes and it returns incorrect result.
Example of the button listener, registerd with AlertDialog is below:
CODE:..........
How should I modify processing of operations to support asynchronous model of Android?
I have done socket communication in a single application it is working fine.
But my requirement is i have opened two emulators and i am able to send sms between those two.
Now i want to run server in one emulator(myavd-5554) and client on another emulator(myavd1-5556)
I have used the following code on Serverside public class TCPServerActivity extends Activity
CODE:............................
I want to invoke the haptic feedback buzz when my ImageButton is pressed, but I am not sure the best way to do it. I first checked that my button was enabled for that, and isHapticFeedbackEnabled() returns true.
Then I am calling performHapticFeedback() with the constant FLAG_IGNORE_GLOBAL_SETTING, as the docs indicate that will be used to override any global settings.
The doc is a little ambiguous, but it does imply that this is something I can call at any time, so I am calling it in the OnClickListener():
CODE:..........
I appreciate that it would be better to call it when the finger first touches the button rather than on the Click event, but I wanted to get it working to start with, before refining it.
Am I barking completely up the wrong tree, or should the above work when I click on the button, because nothing happens?
I am using this code to send an email (with no errors in eclipse), but when I run it in the emulator, I get the "No applications can perform this action." error.String[] mailto = {prefemail}; // Create a new Intent to send messages Intent sendIntent = new Intent(Intent.ACTION_SEND); //Write the body of the Email String emailBody = ""; // Add attributes to the intent sendIntent.setType("message/rfc822"); endIntent.putExtra(Intent.EXTRA_EMAIL, mailto); sendIntent.putExtra(Intent.EXTRA_SUBJECT, "TrackMe Password"); sendIntent.putExtra(Intent.EXTRA_TEXT, emailBody); startActivity(Intent.createChooser(sendIntent, "Email sent.")); Do I need to install some mail app from it? I tried the K9 email app, installed it with adb, but I don't see any changes. Do I need to do something other than installing? Or is there another good program for it?
View 6 Replies View RelatedI cant figure out how to perform an onClick on my ListAdapter.
Here is my code:
CODE:.....................
I want to be able to click on an item from the database, then go into a view that only contains info for that item. My class currently extends ListActivity. I've tried OnItemClickListener, but I dont know what else to use to make it work.
I am trying to find a way to goto a database located on the web perform 1 query and close the connection. I have not had any luck with finding an answer, and I really don't know how to solve this.
Internet connection is not an issue, nor is any security issues. Also this cannot be solved with an internal database and this must go across the web.
Working on a project to develop an application to perform OCR on English Text on an Android mobile phone.I am hoping to use an existing open source OCR engine. like tesseract for example.
View 1 Replies View RelatedI want to be able to perform live demos of an app I've been working at conferences. There doesn't seem to be an easy way to get a video feed of what's going on onscreen onto a big screen. We've hooked up the screen capture utility of DDMS and keep hitting refresh. Its not ideal. I'm aware that there are more automatic solutions that continuously cause a refresh, but these don't really provide video, and I'd also like an audio feed. I can frame grab within my app pro grammatically, but the Android SDK's video encoder only supports capturing video feed from the camera. Any ideas? What's the best way to live demo Android apps to large audiences?
View 17 Replies View RelatedIs there a way I can programatically perform a Fling on a listview? I know there is monkey that does all these things but that requires a computer connection with adb etc etc. I want to do it with my app on any phone, without monkey.
View 2 Replies View Relatedive been looking for a week now i need some help connecting to a remote database...i want my app to get data out of the database and update the database.ive tried this http://www.helloandroid.com/tutorials/connecting-mysql-database but i dont understand it.
View 1 Replies View RelatedI would like to perform a task just before the phone is shut down. I thought that Application#onTerminate would be called but that does not seem to be the case. Is there a broadcast intent when the phone is going to shutdown? If not, how to run a task just before the phone is turned off?
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