Android :: Resetting Or Refreshing A Database Connection
Jun 13, 2010
This Android application on Google uses the following method to refresh the database after replacing the database file with a backup:
CODE:...........
I did not build this app, and I am not sure what happens. I am trying to make this idea work in my own application, but the data appears to be cached by the views, and the app continues to show data from the database that was replaced, even after I call cleanup() and reopen the database. I have to terminate and restart the activity in order to see the new data.
I tried to call invalidate on my TabHost view, which pretty much contains everything. I thought that the views would redraw and refresh their underlying data, but this did also not have the expected result.
I ended up restarting the activity programmatically, which works, but this seems to be a drastic measure. Is there a better way?
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Jul 26, 2010
I got an error during database connection.
CODE:...........................
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Jun 22, 2010
How can I make a simple connection with remote db in android app? Basically, I want to save users names, emails etc. in a remote database and retrieve them later on demand. When answering - could you provide me some sample code so I can figure it out myself please?
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Aug 29, 2010
I can't figure out how to reset the database connection in my app. I am deleting and replacing the SQLite database file, and need my activity to see the changes.
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Feb 13, 2010
How to get the MySQL database connection in android emulator? I try to connect using java.sql.* package like this
I get the exception: java.sql.SQLException:no suitable drive
How can I use sql packages in android mobile?
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Feb 9, 2010
I new to android developer. how connect mysql web server database in android emulator. my web application database is connect by hibernate in struts2 application. so please help me and send some code for struts and android application code.
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Nov 12, 2010
I am making an android app, and i need to connect to a remote database with a webservice. as i know, i will recibe a XML from the webservice, with the result's of my SELECT query (various rows in some cases) i have no idea about XML, and also i have no idea about web services, i only know that i will recibe a XML and i have to parse it to obtain the data. there is a XML parser for this purpose? easy to add to my app and easy to configure?
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Jul 2, 2010
I'm doing Major Project on my final year and I'm very new to Android plus I;m not good at codings. I need help with my login page. I've created something like a database connection java file which is this:
CODE:......................
I've already created a database for users using SQLite. The database name is Users and the table is called User. The records inside the table are Username, Password, LastName, FirstName. I've inserted one user's info into the database. The problem is I do not know whether my UserDB.java is correct.
And I've also created login.java. Hardcoded Login page:
CODE:........
So I want to know how I should apply the database connection on the login.java. Should I insert database connection something like db.Open();? I studied ASP.Net a few months back and I kind of forget most of what I've learnt.
So how should I open the database connection on login.java and how to check with database whether the user enters the right username and password?
Just incase you need my xml, here's the code:
CODE:......
I need to learn how to do it so that I can apply for other pages for example Register.java page.
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Sep 12, 2012
We are developing an Android application will connect to Oracle DB. I have problem with JDBC library dependencies.
I always get (java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver) error, this happened when the Class.forName ("oracle.jdbc.OracleDriver") didn't find the JDBC library. At my case I double checked that my ojdbc6.jar library is existed correctly at build path.
Is there any farther configuration I've missed ? Regarding libraries dependencies, is there any difference at development between J2SE and Android application ?
IDE: Eclipse SDK 4.2 with Android
Android target platform: 2.3.3
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Jul 8, 2010
I'm doing Major Project on my final year and I'm very new to Android plus I;m not good at codings. I need help with my login page.
I've created something like a database connection java file which is this:
CODE:.......
I've already created a database for users using SQLite. The database name is Users and the table is called User. The records inside the table are Username, Password, LastName, FirstName. I've inserted one user's info into the database. The problem is I do not know whether my UserDB.java is correct.
And I've also created login.java. Hardcoded Login page:
CODE:.........
So I want to know how I should apply the database connection on the login.java. Should I insert database connection something like db.Open();? I studied ASP.Net a few months back and I kind of forget most of what I've learnt. So how should I open the database connection on login.java and how to check with database whether the user enters the right username and password?
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Jul 8, 2010
I've modified my previous code for login.
CODE:.......
As you can see, I've left a blank on my if..else. I do not know how to apply an sql statement to check the user and password.
CODE:....
I've insert onClick(); to direct to the other method so that the user will be directed to another page by using the onClickListener method, intent. But I'm having trouble doing that and so I thought that my code is wrong or there should be another way to direct to the other page once the user entered the correct username and password.
Before that, what should I do so that there would be a database connection? Or have I created a connection by inserting db.Open()?
I need to know the codes needed to be inserted the if..else statement.
Another basic stuff I want to know is how to set the text on the password edittext box to dots instead of the actual text.
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May 25, 2010
I'm trying to develop a small app, that can retrieve GPS coordinates, and store them, so I can retrace the path I took. The thing is, the GPS on Android emulator is kind of screwing around with my nerves... First of all, the Mock Position system doesn't work, so I'm manually fixing the coordinates with telnet "geo fix" command. Second of all, the location listener seems to not be refreshing. I'm lauching the app, fixing a first set of coordinates, and observing the response I expect. But when I push a second set of coordinates, the app simply doesn't react.
I tried a lot -big lot- of ideas on this, and I'm kind of running short...
By the way, I'm developping on Eclipse with ADT, and the SDK for Android 1.5 (French HTC Heros are still with Android 1.5) so that I can use my own app.
Here's my code (just the coordinate retrieval part) :
CODE:.................
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Jul 3, 2010
I have a view with a spinner. The activity starts another acvitity with a popup where I add or delete values that the parent shows in the Spinner.
So, in onActivityResult() I refresh the content of the Spinner so that it reflects any additional or deleted values, by calling my fillSpinner() method.
The parameter to this method is the previously selected value:
CODE:..........
When I open the Spinner, it contains the correct list (i.e. it was refreshed) and the correct value is selected. However, the Spinner control itself (in its closed state) does not show the selected value, but the first in the list.
When I step through the code in the debugger, the Spinner value is correct before and after I call setSelection() (and it is always called with the same correct id). However, since I cannot step out of the event, when I resume the execution after a short moment the value in the Spinner changes.
In other words, the spinner's displayed string is changed and is different from the selected item when I return from my popup activity.
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Jul 7, 2010
I have a listview that's populated by rows that get their data from a web server. It all works totally fine except I want to have a refresh button to re-download the data. I'm getting the data through an asynctask (getting the data in doinbackground) and then setting the listadapter in onpostexecute. All I do to run the asynctask which should take care of everything is run
new PopulateListTask().execute();
However, in my optionsSelect method, creating a new asynctask just like I did in oncreate doesn't do anything. It doesn't even enter doInBackground. I've tried using listView.invalidate() and listView.invalidateViews(). Is there some special way I'm supposed to repopulate a listview?
My only guess is that since I'm using a custom adapter, my getView method is creating some kind of error, but that wouldn't explain why it's not even entering my asynctask's doInBackground method. Thoughts?
Posting some code. This is a trimmed down version.
CODE:............
I'm getting this in my logcat when executing my asynctask the 2nd time. Any idea what it means? I tried googling to no avail.
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Aug 23, 2010
I created an Activity which allows navigating between pages with a couple of Buttons (Previous and Next). When the user clicks one of the buttons, the Activity (same) needs to be "refreshed". In order to do this, I set up the buttons to make a call to onCreate(this); after they set up the other stuff that the activity uses for the paging to work. And it is working so far, but I'm wondering if there is a better way. Is there?
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Aug 18, 2009
I have a TabActivity based class which has 3 tabs. All are ListActivities (but that's not important for this problem)
I'm updating the TabHost's TabSpec's to change the text on the tabs. This works fine and the ListActivities display correctly.
Iater on the execution flow I need to update the Text on the tabs from "Current Text" to "Current Text (3)", for example. I update the TabSpec.setIndicator() with the new text, and attempt to call invalidate() on the TabWidget (and all it's children). But the tab text refuses to update!
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Nov 8, 2010
ive 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.
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Feb 21, 2010
Anyone else having problems with the Weather Widgets app clock not refreshing? The weather seems to do its job every 30 minutes, but the clock gets stuck at times. Like today, it was 3 hours off. Anyone know of a fix for this? I checked for updates, but no luck.
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May 24, 2010
I need to refresh my listview on my activity whenever i remove an item. I tried to call the activity (startActivity(Intent) ) it works but i lose the tabwidget.How Can I refresh my list without any lost ?
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Nov 20, 2009
I'm running into some issues here with my app. I have 4 tabs run through a tabActivity. One tab sends an intent and run my ListActivity that populates the screen from a simpleCursorAdapter. My problem is that when I change back to this tab, after the first time its run, the list never refreshes regardless of the changes made to the database via other tabs. Is there something I can call from onTabChanged to refresh my ListActivity?
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Sep 20, 2010
In the Settings menu, there is an "Auto Refresh" option which you can set to "Never," but there is also a "Ticker Refresh" option which you can't turn off. What do each of these things control? Is the Auto Refresh just for when the app is running? Does it affect the widget at all?
Does the Ticker Refresh option only affect the widget? Does it have any effect if the widget is not being used on any homescreen?
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Apr 24, 2010
My problem is when I want to refresh data in ExpandableListView while being in that current activity. I create adapter and when I want to add new data to list I call again constructor of that adapter(it is my private variable) with all new data....and then I call onContentChanged() method to redraw my list.
But what happens is that I cant expand my list any more...like it is blocked or something and logcat isn't saying anything...
This is the code that i call after setting new data in arraylists and maps:
CODE:....................
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Aug 17, 2010
I created a ListView that contains a row which in turn contain text and a button. The idea is to have the button function as a delete button to remove the row from the list as well as the database. I order to do this I created an adapter to handle the button click. This code is below. Deleting the database record works fine, but I have not yet succeeded in refreshing the ListView so the record will no longer be displayed.
public class FeedArrayAdapter extends ArrayAdapter {
private ARssEReaderDBAdapter dba;
private String TAG = "FeedArrayAdapter";
private View v;
private ListView feedList;..............
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Oct 2, 2009
I've got an App Widget that gets updated (er... I try to update it) with the following chunk of code: ComponentName thisWidget = new ComponentName(context, MyAppWidgetProvider.class); AppWidgetManager manager = AppWidgetManager.getInstance(context); manager.updateAppWidget(thisWidget, remoteViews);
The problem I'm seeing is that it the user interface is updating always one behind (i.e. using the previous remoteView to update the user interface). So, i make that call with a certain configuration in remoteViews, and it doesn't reflect in the UI until the next time I call it with a different remoteView. I know this is kinda vague and I don't have a lot of details here, but i was wondering if I'm missing something very obvious.
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Mar 29, 2010
I want code for refershing my page automatically when i click on any button.For Ex I have a people page In that page i delete people from total peoples using one button but that selected people is not deleted immediately That means the People page is not refreshing.So,I want code for refreshing that page.Give me any suggestions.Thanks in advance
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Mar 18, 2010
I'm trying to add views dynamically to a linearlayout. I see through getChildCount() that the views are added to the layout, but even calling invalidate() on the layout doesn't give me the childs showed up.
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Sep 29, 2010
I have a Moto Droid 2.2 with "Alarm Clock Plus v2" set as my clock when in the multi-media dock. The weather information will load the current weather when the application first starts up, however will not refresh.
If I tap on the weather it will open the weather info with up to date info but going back to the clock will still show the old data. By removing the phone from the dock (thus exiting Alarm Clock Plus) and putting it back on the dock (thus running Alarm Clock Plus again) the weather info becomes current.
Has anyone else run into this? I looked in the settings for Alarm Clock Plus v2 and could not find any information on how often to refresh the weather info.
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Jul 29, 2010
I have created an option menu which also has a sub menu. In the sub menu I have a setting for enabling/disabling images in my application based on the application level flag that i change based on the option being clicked.What I am observing is that when i click on the "Menu" and change the settings from enable Images to disable Images. its not reflecting.I have put the debug log and what have been seen is the onOptionCreateMenu method is getting called only one time- first time when i click the "Menu" button. That is the reason the changed sub menu is not getting reflected.My question is that is there a way i can re-create the option menu every time user presses the "Menu Button".
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Mar 26, 2010
How do you stop the Droid Eris mail from not keep checking for new mail? I tried clicking stop and closing it but it still keeps refreshing all new email. Any help to stop this action?
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Jan 11, 2010
Is anyone else finding that their Facebook notifications page will NOT refresh?
Mine has been stuck since Jan 6 (only that page) and g I can just go to the website, it's downright annoying.
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