Android : How To Cancel An OnItemSelected Upon Startup?
Aug 5, 2009
1) I have a Spinner with several options provided by an ArrayAdapter and have an onItemSelected listener on this Spinner. When selecting an item from the spinner, I want to display another view (list-view) but this method is unintentionally invoked upon initially displaying the view. The list-view is therefore displayed upon startup of the application. It is possible to add a spinner-on-item-select listener that won't fire upon initially displaying the view but only by the user selecting an item?
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Jun 30, 2010
CODE:......
In this code i am creating two drop downs and now my requirement is when i select the item from first combo the data in the second combo must be changed according to the selected item of first combo. now in onItemSelected property how to code specially for first dropdown?
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Nov 24, 2010
I am using a menu in my application Same as this post... I am using a gallery view for display my menu items
Text Gallery on Android?
Problem is that, i implement onItemSelected listener for gallery, so that when new item is selected data related to that topic loaded. But i also want to allow user to scroll the gallery fully. but each time when user move to next item onItemSelected() function called and it start loading data.
All i want to do is to put some delay in onItemSelected() function, so that if in between that delay user scroll next item than there is no need to load data of previous but for the current. Time may be 1 second. If user dose not go for next item in 1 second, that data of that item must be loaded.
I thought to start a thread,but each time for onItemSelected() there will be new thread...
I try this to.
CODE:............
But Fond Exception.
CODE:.............................
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Jan 7, 2010
Every time I start my phone it seems that every program in the app catalog starts up. Until I activate the Advanced Task Killer and shut them all down, the thing runs like a hog. I have quite a few programs installed, but I dont use them all all of the time. Why do they all start up and is there any way beside the ATK to stop them? Is there any way to modify the startup files?
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Apr 1, 2010
I've thought of some less than elegant ways to solve this, but I know I must be missing something.
My onItemSelected fires off immediately without any interaction with the user, and this is undesired behavior. I wish for the UI to wait until the user selects something before it does anything.
I even tried setting up the listener in the onResume, hoping that would help, but it doesn't. How can I stop this from firing off before the user can touch the control?
CODE:...........................
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Jul 22, 2010
My Activity implements OnItemSelected listener for a spinner. It has the interesting problem of firing off the onItemSelected callback when the activity shows. So I used a flag hack to solve it (I hate it, but at this point I just want the app to work).
Strangely enough, even though the callback gets called right at activity start, my actual touch selections don't work. I can touch the list, open it, see the strings from the array adapter, and even touch it to make it dismiss - but the callback is never called.
My code:
CODE:...........
In onCreate():
CODE:..............
The callback:
CODE:................
The toast is shown right when the activity is shown, but when I select items in the spinner, the spinner dismisses and no toast is displayed again (not to mention the rest of the code in the callback fails to execute).
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Feb 6, 2010
I am trying to write an application with a list of items read in from a file. This item list and the fields that go with each item are fed into a DB. The item names are presented to the user as an auto- completing list. Once the list item is selected, I would like to get the value from the list and use it to query the database and display all the detail information.
The problem I am having is trapping the event using onItemSelectedListener and onItemSelected.
Below is what I am trying.
CODE:..............
This doesn't compile, but it has the fewest syntax errors.
How to get an OnItemSelectedListener to work? and how I grab the value selected?
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Mar 5, 2010
I am having an Android view with a Spinner on it. I call a populateSpinner() method to add some default values to it.
I also have a onItemSelected() event which gets called before the view is completed to print.
I would like to run a code inside this block only when the user changes the selected items, not when I add or the form gets created.
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Jun 30, 2009
How to cancel a connection?
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Jul 2, 2010
i am using a unique value (primary ID) to set an alarm. When i want to edit the alarm i am using the same key. But what i see is that both the alarms go off! original as well as edited one. how do i cancel the old alarm ?
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May 30, 2010
I am making an event application and user can set a reminder for events he wants. So i use the alarmManager to create alarms. I would like to put a cancel all option to my main activity so that i could cancel all the alarms created by my application. The usual method for canceling the alarm with the same intent doesnt really help cause i set tha alarms on a different activity than the one I want to cancel them in. So is there a way to cancel all the alarms created by my application?
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Apr 16, 2010
Code below creates an Alarm, so far everything is working fine. But i am a bit lost in the Documentaion how to cancel an Alarm. I need to cancel only special Alarm(s) depending on Intent#putExtra(IntentConstants.SELECTED_PRIMARY_KEY,_selectedID);
How can i archive this ?
CODE:.....................
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Jul 25, 2010
I'm writing something like a reminder for users. Users will set reminders for their events, when the time comes, a repeating alarm will be set to trigger a status bar notification. But the alarm seems non-stop after I selected the notification or cleared the notification. I am not sure where to cancel this repeating alarm. Below are some of the codes...
How can I stop the alarm when the user selects the notification or clears it?
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Jul 26, 2010
As far as I can tell, AsyncTask's cancel method doesn't work as advertised. I can't tell whether this is a bug, or me not understanding AsyncTask's cancel() method. I'm asking here instead of StackOverflow because I suspect it's a bug.
I understand from past discussions here that cancel() isn't meant to actually kill a thread (though the description of the mayInterruptIfRunning flag sure implies it is). But I'm also checking for isCancelled() (which is returning false), and trying to use the onCancelled callback (which isn't getting called), to no avail.
My situation is that I have a (short-running, one small network call) AsyncTask that begins in my Activity's onCreate. If the user backs out of the screen before it finishes though, I need to either cancel the AsyncTask entirely, or at least make sure its onPostExecute doesn't do any meaningful work.
In my activity's onDestroy handler, I call cancel() on the task, and then inside the task I have an onCancelled handler that sets a boolean. In my onPostExecute handler, I check isCancelled(), and I also check to see whether the boolean has been set from onCancelled, and neither are.
I'm using the debugger, and the order of operations is:
1) onDestroy(), calls task.cancel() 2) task's onPostExecute runs, isCancelled() returns false, so I have no conditional to stop the flow and that's it. onCancelled never runs.
What am I doing wrong here? I can't find any way to tell my task not to run its work in onPostExecute.
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Jun 29, 2010
I'm extending the CountDownTimer class to obtain some custom functionality .In onTick() in case some conditions are met I call cancel() , expecting that will be the end of it, however the onTick() callback gets call until the the count down is reached . So how to prevent this from happening ?
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May 27, 2010
I've been reading through the docs, and I cannot figure out how to cancel a "drag" on a Seekbar once the bar has been completed.
For example, when I drag the bar to the end, I want an event to happen. However, if I keep my finger on the screen and drag my finger past the SeekBar, it keeps firing off that event even after I reset the progress of the Seekbar. How can I prevent this action from happening?
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Feb 8, 2010
How can I cancel a loading operation in WebView started by loadData() method?
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Apr 20, 2010
Cause it doesn't.I have a service running an Asynctask to do some work. I bind to it from an activity and call a cancel method. The service, in turn, calls AsyncTask.cancel(true);
AyncTask.cancel returns true. Nonetheless, the thread is still running happily and still doing the things in doInBackGround, sending notifications along the way.
There is no sign that it attempted to kill the thread. I am not using NDK calls or anything that I think should stop if from taking down the thread. What am I doing wrong? Or is this a known issue?
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Jul 14, 2009
I'm facing the same head-scratching moment similar to what this person (from Jan 2008) experienced when I realize that there is no cancel button in Android's progress dialog or spinners. It is now July 2009 and I've just installed the cupcake version of Android. Has this thing changed ? If not, are you adding a cancel button into the dialogs and how do you do it ?
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Jun 15, 2009
Is there any way to cancel Google account already set on the device?
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Feb 23, 2009
How do I display a simple yes/no or ok/cancel dialog with a title and react to the user choice?
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Apr 8, 2010
I create my dialog like this code...
The suer can now cancel the notification popup message by clicking outside the box. But how do I allow the user to cancel the dialog by touching on the dialog?
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Aug 21, 2010
I have an extended dialog class that I want to show for 3 seconds then disappear.This works great the first 2 times it's called, but then it crashes my app after that.Admittedly, I'm not the best with threads and I think that's where my problem might be.As you can see from the code below (commented out section), I tried using a cancel event to kill the thread that is spawned, but that makes it crash the first time it's run. I've also tried doing all of this on the parent class' UI thread which yields the same result as this (crashes after 3 times displaying the dialog).
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Jun 13, 2010
I registered a PendingIntent to requestLocationUpdates(provider, minTime, minDistance, PendingIntent). But when my broadcast receiver receives this intend, how do I remove this request with removeUpdates(PendingIntent)? The receiver doesn't hold a reference to the original PendingIntent.
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Sep 5, 2009
I'm trying to show a simple layout where I can call this activity and fill in some values, then hit the save or cancel button. Unfortunately the save and cancel buttons never appear. Can someone help please?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android" android:layout_width="fill_parent" android:layout_height="wrap_content"
android:paddingLeft="8dp" android:paddingRight="8dp" android:paddingTop="8dp">
<TableLayout android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="wrap_content"> <TableRow>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/band" android:textStyle="bold" android:textSize="16px" android:paddingRight="5dp" />
<EditText android:id="@+id/band" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1"/>
</TableRow> <TableRow>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/members" android:textStyle="bold" android:textSize="16px" android:paddingRight="5dp" />
<EditText android:id="@+id/members" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1"/>
</TableRow> </TableLayout>
<TableLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent">
<TableRow> <Button android:id="@+id/save" android:text="@string/save" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" />
<Button android:id="@+id/cancel" android:text="@string/cancel" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" />
</TableRow> </TableLayout> </LinearLayout>
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Nov 16, 2010
I want to cancel a Toast to show the next one. This is the description of the behavious I want, when I select one element in the menu i display a toast from the actuel menu element, but if i switch from one element to an other quickly i'm creating a list of Toast to display. So i need to cancel the previous one but i never succed. This is an extract of my code: public class MainActivity extends TabActivity
private Toast toast; private String toastMsg;
private void toast(){ if(toast!=null){ toast.cancel(); } toast = Toast.makeText(MainActivity.this, toastMsg,Toast.LENGTH_SHORT);
toast.show(); } }
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Oct 1, 2010
I have found this example http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012 from Fedor which is absolutely great for what I need.
I have a question. if beside the Clear Cache button there would be a button with Cancel. How could I in onClick cancel the image download thread from the UI? code...
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Nov 18, 2010
If I use the AlarmManager to schedule an alarm (a PendintIntent which should be send), how can I identify that alarm later to cancel it? Can I cancel all alarms scheduled by my app?
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Aug 11, 2010
In my Android application user can fill database with imported data, then perform predefined, complex SQL query. With some data pattern, query will take very long (minutes and more on HTC Hero), while common usage will not exceed 10-15 seconds.
Is there any way to cancel pending SQLite query on Android? Timeout would be as good as well, partial results are not required. I'm performing query within AsyncTask.doInBackground()
I know best way is optimize query or change app logic, but in this case results depends on user knowledge anyway, so I'd like to help those who enter troublesome pattern.
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Jun 26, 2010
I'm using a datepicker in Android to let the user to choose the date. I want it to do one thing if the user picks a date and sets it (I have that working fine) and then to clear a certain text field if the user pushes the cancel button on the datepicker (open up the datepicker but then cancel out of it).
The way I've been trying is by making a code...
to attach the listener.
My problem is that the listener works if the user pushes the back button, but not if they push the cancel button. I tried using a dismiss listener, and that works, except for the fact that it goes off even whether I set or cancel the datepicker!
What do I need to do so something goes off if and only if I push the cancel button on my datepicker?
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