Android :: Spinner Control - Differentiating Between User Selection And Initialization
Jun 12, 2009
I've implemented a spinner with an OnItemSelectedListener event handler. When I initialize the spinner and when a user makes a selection the even handler gets called. What I need is to determine when a user makes a selection. Is there a way to determine in the OnItemSelectedListener whether the event was triggered because of data initialization, or because of a user selection? Am I going down the wrong path trying to do this with the OnItemSelectedListener? Is there a better way to to capture a user selection event on a spinner control?
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Aug 4, 2009
I'm trying to use Spinner as a button with selection pop-up. Basically I want an icon and when user clicks it - the popup list is displayed and user can make a selection. The Spinner happily accepts icon image as drawable background. Unfortunately when I select a value the text overlays the background. Is it possible to set selection text color as a transparent? Or maybe there's a better way?
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Nov 20, 2010
I am trying to get a Spinner to work in Android. It displays fine and I can select any one of the options in the list. But how do I transfer that to a string?I would have thought in the code below that 'selected' would hold the selected string, but I get an 'Illegal modifier for the local class YourItemSelectedListener; only abstract or final is permitted' error on the 'YourItemSelectedListener'.What am I doing wrong?
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Jun 22, 2010
I have a spinner selection box on my activity, but now I want to remove the spinner from the main view and make the selection available by an option from the menu button. How do I get the dialog the spinner shows if I click it without having the spinner? Currently I fill the spinner using a SimpleCursorAdapter like this:
Cursor c = db.fetchAllSets();
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this android.R.layout.simple_spinner_item, c, new String[] { DatabaseAdapter.SET_KEY_NAME }, new int[] { android.R.id.text1 });
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mSetsSpinner.setAdapter(adapter);
So now I'm planning to remove the spinner from my activity, add a new button to the menu and in the onOptionsItemSelected(...) show a dialog with the list of available selection - just the way it is right now after clicking the spinner object.
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Aug 21, 2010
I have a Spinner whose items comes from an ArrayAdaper, and I want the Spinner to initially show that no item has been selected. When the user clicks on the Spinner it's DropDownView should display just those items available for selection.
I don't want to add an empty/blank item at the head of my list of items because that means that it shows as an avalaible selection in the DropDownView and looks pretty lame. And if a selection is made I want it to be a valid one.
I tried spinner#setSelection(-1); but that doesn't work. The first item remains selected.
I tried setting no Adapter initially (which provides the desired initial view) and had hoped to configure the appropriate adapter in the OnClickListener, but spinner#setOnClickListener throw a RuntimeException saying "You probably want to use #setOnItemClickListener instead". And trying to use #setOnItemClickListener throws a RuntimeException saying it is not valid for a Spinner.
Surely this is a common use case. How can I set the Spinner to initially show as empty?
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Jan 24, 2010
I'm binding a data table into a Spinner. But I cannot set the default selection for the Spinner based on a specified identifier which comes from the id column of the table.
How can I do that?
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Sep 16, 2010
As the title says, i have a Spinner with just a couple of options and a button. I didnt declared any Listener for the spinner, instead of that, what i want is use the button and perform different actions depending on the spinner selected option.
So, i declared a handler in the button option "android:onClick", but once there, i dont know how to access the option selected in the Spinner.
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Jun 3, 2010
I am trying to have my program grab web content based on "Spinner" selection. I have a "Spinner" and a "button" to execute selected item.
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Sep 2, 2009
I am wondering is there any way to create something similar to spinner but which allows multiple selection. I guess we can select multiple entries from ListView but I don't have much space to show all the entires and also I need to show three different categories on the same Activity which you can select from.
Here is what I want to do:
Category 1:
Category 2:
Category 3:
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Dec 24, 2011
So I am new to developing android apps and had a question. I have a spinner and based on the selection I was wondering the best way to call another class / layout.Here is my main class
Code:
public class BestBuyMobileActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
[code]....
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May 5, 2010
I just got a Droid, and after having used it for a while, I felt like I wanted to make a program for it. The program that I am trying to make calculates the actual storage capacity of secondary storage mediums. The user select from a list of units that ranges from KB to YB and the size the entered gets put into a formula depending on the chosen unit.However, there is a bit of a problem with the program.From my testing,I have narrowed it down to the fact that the user's selection is not really being obtained from the spinner.Everything I look up seems to point me to a method quite similar to how it works in J2SE, but it does nothing. How am I actually supposed to get that data?
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Aug 2, 2010
I've built a dialog that asks the user to pick a city from the list provided when the application first opens. The dialog works perfectly, however I want to store the user's choice so that when the app is opened a second time, it checks to see if the user has already made a selection previously. If they have, it doesn't display the dialog and defines the city variable as their previously chosen preference. And obviously, if they haven't made a selection previously (because its their first time opening the app or for some reason the app couldn't read the stored preference), it displays the dialog.
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Apr 6, 2010
I am trying to record the selection made by the user in the array. But when I run the app, it crashes the moment I click something.
CODE:......................
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May 14, 2010
i have code that runs onitemselectedlistener event of spinner.So when i am in the method :
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
//I want to do something here if its a user who changed the the selected item
}
... can i know whether item selection was changed programmatically or by a user action through UI.
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Nov 5, 2010
I've seen some answers to questions about how to specify a custom layout for a spinner's pop-up list, but what I want to do is to customize the text on the Spinner control itself, such the "setText..." methods that you can call for a Button (TextView subclass). Is there any way to do this? What I'm trying to do is to make my own Spinner design as I have for some of the other controls so it takes up less space and matches the general look of my app.
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Nov 12, 2010
I cannot find a corresponding control anywhere. The control I am interested in is iPhone's spinner.
It's much simpler to use than Android's TimePicker.
Since I see that native Clock app has it, does anyone know how is that control called and how can one use it in his app?
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Sep 2, 2010
I am creating an Android application for a customer which will be pre-installed and distributed together with the handsets. Now the customer asked me to lock down the ROM to prevent the future users from using anything else apart from this one app. I.e. no browsing, no email, nothing which could create any costs etc.
Now after some googling it seems to be relatively straightforward to remove applications from an Android image. But even if I can remove the web browser, email client, the Android Market App etc, how can I make sure that the user will not reinstall those apps via the USB connector? As Android is just Linux I am sure there are ways of denying all users the right to install new applications (or actually denying them pretty much anything apart from using this one app).
To clarify things a bit, the customer does not want to use the android devices as phones, even though they are phones. With 100€ touch screen phones becoming available, it becomes viable to use those phones for just one specific purpose. In my customers case, the device will be used as something like a POS system: the employee uses the phone to process a certain kind of customer request, and for this the app needs to have a data connection which will accrue costs of course. Now obviously contracts can be set up that will oblige employees to pay any irregular costs themselves, but why make it that complicated?
This is not about taking freedom away from users but rather about using android phones as general purpose touch screen devices with a data connection that employees can use in a business environment without shooting themselves in the foot with unexpected high data connection cost.
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Nov 17, 2010
I'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.
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May 20, 2010
I use this code to generate a spinner in my app:
code:.........
On my device (Motorola Milestone) and in the emulator this looks like the standard gray spinner widget.
On of my colleagues uses a Motorola Backflip and on his device the Spinner is black. Now its very hard to read the font in the spinner.
What do I have to do to use my own view for the spinner? I don't mind to have the gray spinner on all devices, but it should always look the same on all devices.
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Jun 9, 2010
I have an xml layout file which contains a few widgets including a Spinner
I want to display a list of strings in the spinner, the list is generated at runtime as a result of a function so it can not be in arrays.xml.
I tried doing:
CODE:...........
But this crashes my application.
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Jan 25, 2010
I have a spinner 'aperture' set up with a list of numbers, and a spinner 'mode' with two options. When a button is pushed I need a calculation to run using various inputs, including the current selection from 'aperture' and a value derived from 'mode'. How do I call the value of a spinner so I can use it in a calculation?
Also, how do I use the spinner 'mode's selection to set this other value before implimenting it in the calculation? To be more specific, if the spinner is set to Small then the value I use in the calculation is 0.015, whereas if Large is selected I need to use 0.028
My other inputs are EditText views, so right now I am set up like this:
CODE:............
That is not the actual equation, it is just a test to make sure everything connects properly. How would I call the value of spinner 'aperture' and the Small/Large spinner 'mode'
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Jan 25, 2010
I have a spinner widget in my activity which lets users pick a list name.
Normally, the function of the spinner is to switch between lists but for a couple of instances, I swap out the selection change listener to perform a different function with the same list of options. Once the selection has been made, the old listener is restored and life goes on.
This is a bad and buggy arrangement. Instead, I would like to have a function that just takes a selection listener and some other parameters and shows a popup list that's populated by the same cursor (or and identical cursor) as the spinner, without using the spinner itself.
Is there any way I can do this?
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Jun 21, 2009
I am trying to populate a spinner depending on another spinner's selected item, my code is the following:
CODE:.................
what is intriguing me is that the first spinner onitemselection works perfectly ( I can see the values in LogCat) then when I change selection of the 2nd spinner I am gettging an error on this line: String selected= (String) s2.getSelectedItem(); So the compiler gets insisde then onItemSelected function of the 2nd spinner but throws an Handler exceltion on s2.getSelectedItem()
why? it works perfectly for the 1st spinner.
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Feb 15, 2010
I have next situation: After installing application it has to init settings from server. And while it is not has right preferences it has to wait. I have several receivers and service - I don't want to check for initialization in every action in these components - I think there have to be better solution.
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Mar 21, 2009
I want to initialize ImageView class in Class which do not extends View.
CODE:........................
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Nov 26, 2009
I have searched the forum for GPS but find nothing so I am posting here, move if the wrong place. I have a VZ Droid and find that the phone service has to be turned on before the GPS will find any satellites. The fix will continue to hold if I switch to Air mode so the phone is not needed after initialization.
Google has been good enough to give us European maps but if a phone service is needed to initialize the GPS the location function etc will not work in Europe. I had planed on taking the Droid to Italy next year but it looks as if it will be useless. Any workaround or is my phone "broken"?
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Jun 22, 2009
I am trying (as many are doing) to populate a 2nd spinner out of the first spinner selected item like this:..............
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Nov 21, 2010
Trying to code a simple Live wallpaper for android. I'm having trouble finding out how to capture the screen size at initialization.Any thoughts on how I might can accomplish this?
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Jul 2, 2010
I have a problem with a tab view on android. I am using 4 xml layout files (each a RelativeLayout) as the content for tabs in a tab view. The main.xml contains: TabHost (@android:id/tabhost) containing a linearLayout which contains a TabWidget (@android:id/tabs) and a FrameLayout (@android:id/tabcontent). If I embeded the multiple one after another in the in the main.xml everything works fine (except my main.xml is unmaintainable which is the problem I want to solve by splitting the files into a simple main.xml which defines the tab and the content frame and then push the views onto this). The code I have to inflate and insert the 4 RelativeLayout xml files into the tab content is as follows:
mTabHost = getTabHost(); View wv = null;
wv = LayoutInflater.from(this).inflate(R.layout.user_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("User").setIndicator("User").setContent(wv.getId()));
wv = LayoutInflater.from(this).inflate(R.layout.track_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("Track").setIndicator("Track").setContent(wv.getId()));
wv = LayoutInflater.from(this).inflate(R.layout.chart_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("Chart").setIndicator("Chart").setContent(wv.getId()));
// And so on for the multiple tabs.
When I run this the first tab (User) is empty and the remaining tabs have all the content from all the views. So tab2 has the content from tab1-4, tab3 has the content from tab1-4 and tab4 has the content from tab1-4. Returning to tab1 it then has all the content from tab1-4 now. The code works just fine, the events on the various objects in the views etc all are good. It is just that they are all muddled together in the view. What is causing this and how to correct it?
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Mar 16, 2009
I am trying to make the use of Network location provider to get the location updates, But it seems to be that Network location provider makes use of MASF client . From the debug statements we found that Network provider does seems to launch MASF client , Would some one explain me the basic sequence of initialization of Network service provider ? and if MASF client is not getting initialized do we need to do some settings. What do i need to check .Any information on this is Highly appreciated.
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