Android :: Use Spinner To Hide / Display View Objects?
Sep 26, 2010
For an Android application, I'm trying to use a Spinner which, when an option is selected, will hide/display relevant View objects. For my application, these objects are an EditText and an associated TextView label for the field. Unfortunately, I can't seem to get the EditText to hide/display, and when I add it code to hide/display the TextView, I get a NullPointerException. I presume that since I am laying out the view objects in a RelativeLayout, by hiding one of the view objects, I am removing its relationship with other view objects, hence the NullPointer.
Can anyone figure out why this might be happening? Here's my code...
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Jun 15, 2010
I have an application that have a Google map on Google Android 1.5 since we have been working on the application for a long time, we are not in stage of upgrading to the newest framework, so we are using 1.5. Now, I have map locations that are dynamically generated and drawn on the map at run-time to visualize some streams, Up to this point the application is working fine, Now my problem is that I am trying to filter the objects ( addresses) to visualize only the on-screen ones. I do NOT want to visualize the addresses that are off-screen. The way I am trying to do this is to check the screen-coordinates of each object (address) before visualizing it, then it the coordinates (x,y) more than (0,0) and less than (320, 460). I should visualize it. I am trying to use this approach, but it is not working for some reasons, I have tried many posts but could not understand why, there must be something missing somewhere that I am not aware of.
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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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Mar 16, 2010
I have a selection for some items using a spinner widget. At the moment the spinner will load a simple Textview and show the name of the item.It is possible to define an own view to show inside the spinner row? I would suspect it being similar to a custom List row.I simply want to show an individual icon left from the spinner text for each item in the list.
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Jun 9, 2010
I have to dynamically add a list of views (the views use RelativeLayout). Can I do this by specifying the view definition in xml and instantiate multiple objects off it? This gives the usual benefits of separating the view part from the code (for e.g., making it easy for the UI guys to alter things) or Is going the ArrayAdapter the suggested/only route?
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Aug 17, 2010
I am implemented to kids application I am implemented spinner in added array category list these are array text list now I am implement these text array list replace in drawable images in spinner how can implemented:
personalinformation = (Spinner) findViewById(R.id.SpinnerCategory);
ArrayAdapter<?> adapterDefaultpersonal = ArrayAdapter.createFromResource(Animals.this,R.array.Animalinformation,
android.R.layout.simple_spinner_item);
adapterDefaultpersonal.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
personalinformation.setAdapter(adapterDefaultpersonal);
personalinformation.setSelection( getSharedPreferences("", 0).getInt("SpinnerSelection", 0));
personalinformation.setOnItemSelectedListener(new OnItemSelectedListener()
{ public void onItemSelected(AdapterView<?> parent,View v,int position,long id) {
if(position==0) { } } );
This is the spinner code I am using array of text list these text replaced to drawable items in to spinner how can implemented some solution I am new in android.
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Jun 18, 2010
I created two Spinners to display the data in my application. In my first Spinner, the first item of the list is always displayed directly, but in the second Spinner nothing is displayed, even if I click on an item on the drop down view. Can anybody explain this behaviour?
Here is the code...
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Oct 27, 2010
i have a spinner with an arrayadapter that is dynamically managed. when it gets displayed, the spinner text also displays the radio button. how do i get rid of this radio button?
NOTE: i'm not talking about the radio buttons that appear in the list that is displayed when i select the drop down on the spinner.
here is a pic of what it looks like: SIGH cannot upload image as i don't have 10 pts. so i've found a link: http://www.slashresources.com/android-gui-examples/ scroll down about 1/2 way and find the spinner example on that page. and my spinner looks like the spinner thats grayed out by the list. notice how the drop down arrow is all strecthed and yucky... thats my problem.
Here are the appropriate code snippet... couple of points:
This code is in the constructor of widget which is a subclass of Spinner value is an array of Object instances (passed when the widget gets created) there are no XML resources; all widgets are dynamically created thinking i need to "manipulate" the prompt, i added setPrompt(...) in the constructor and also in the onitemclicked event listener... this had no effect.
Q: what am i missing? seems to me i'm missing some attribute of the Spinner which is causing the radio button to also display in the text part of the spinner.
-- snip code --
CODE:............
-- end snip code --
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May 4, 2010
Is it possible to disable title bar display dynamically after setting the content view by setting the NoTitlebar theme?
All the posts I have read told that any title bar changes we can make only before setContentView() call.
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Jan 28, 2010
How can I display a particular array of items from a database (SQLServer) in a Spinner of Android?
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Jan 30, 2013
I have to develop one android native application.Here i have to fetch the value from mysql database and display on android edittext and spinner box.
I have to run the app means the value is fetching from database and displayed on android edittext.but not display on spinner box.How can i display the value on android spinner box fetching from mysql database.I have used the below webservice code:
Quote:
public class DisplayProfile {
public String customerData(String Username,String Bcountry){
String customerInfo = "";[code].....
Why am getting the above error?how can i resolve the above error ???? how can i display the fetching data on spinner box list on first item...
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Sep 7, 2010
I have a series of imageviews that I want to display, but on a button press there needs to be less or more. These imageviews are stored in a list. Is there a simple way to hide or display them?
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Jul 25, 2009
What is the name of this view.link text
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Oct 26, 2010
The FAQ mentions a method of passing objects around activities. (It is not clear to me): "A HashMap of WeakReferences to Objects. You can also use a HashMap of WeakReferences to Objects with Long keys. When an activity wants to pass an object to another activity, it simply puts the object in the map and sends the key (which is a unique Long based on a counter or time stamp) to the recipient activity via intent extras. The recipient activity retrieves the object using this key.".................
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Feb 25, 2010
When I try to set the Alert using ArrayAdaptor to display a set of items, the list is displayed but the items' characters are invisible. If the item is selected, then the characters are visible. Scratching
my head on why. Appreciate any advice.
Below is the code and the screenshot from the emulator.
CODE:.............
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Sep 29, 2009
I am trying to change the items in a list view based on a value that gets selected in a spinner that is in the same activity. Is there a quick way to do filtering on the list adapter data based on that value, or should I go the long way of changing my adapter implementation for easy filtering?
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Sep 10, 2010
Is there a clever way to let the user switch between hide and view password in an android EditText?A number of PC based apps let the user do this.
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Sep 7, 2009
In browsers when I type view-source: before any address it gives me the page source. But i am not able to do it in android. It gives me "web page not available" . Can any one please tell me why it is giving that and any other way for me to view the page source in android?
One more doubt is what exactly is "@hide", even if I commented it( /** @hide */) it is having some meaning( it is not visible in another classes ). When I deleted it its working fine, it is visible. what is the reason?
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Jul 14, 2010
I tried with threads, but android throws "CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.".
So how can I wait 3 seconds and then hide the view, letting the GUI responsive?
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Jul 29, 2010
I have a little problem. I have class
CODE:..............
When I do that, method convertView.setBackgroundColor(Color.RED) work great, what I need Image is there:
dl.dropbox.com/u/866867/stack/device2.png
But when I want to remove that item, I can't do it. I add there convertView.setVisibility(View.GONE); , but have empty item, beside hide it. I read that parameter View.INVISIBLE won't hide layout, but View.GONE have, but in my code, doesn't.
And that image: http://dl.dropbox.com/u/866867/stack/device.png
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May 31, 2010
I need help in setting up value and display text in spinner. As per now I am populating my spinner by array adapter e.g. mySpinner.setAdapter(myAdapter);
And as far as I know after doing this the display text and the value of spinner at same position is same. The other attribute that I can get from spinner is the position on the item. Now in my case I want to make spinner like the drop down box, which we have in .NET. Which holds a text and value. Where as text is displayed and value is at back end. So if I change drop down box , I can either use its selected text or value. But its not happening in android spinner case.
For Example:
Text Value
Cat 10
Mountain 5
Stone 9
Fish 14
River 13
Loin 17
So from above array I am only displaying non-living objects text, and what I want is that when user select them I get there value i.e. like when Mountain selected I get 5. I hope this example made my question a bit more clear.
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Mar 5, 2010
When I had a view that's in my HorizontalScrollView it leaves a blank area because it's still being considered for layout purposes. Is there a way to have it not occupy space when I hide it?
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Mar 2, 2010
How do I ensure that I get the 'resize' behavior when the IME is shown/hidden?
I've included the following in my manifest:
android:windowSoftInputMode="adjustResize"
What else am I supposed to add? I've read that the container that the View is placed in should 'support resize' but what layouts support this?
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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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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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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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Aug 5, 2009
I have been working on an application which deals with maps. I would like to know how to generate infowindow [popup window like we seen on google maps and also on the google maps app on android too]. Can anyone here help me with this ? Also how can we get an image from the street view for a particular latLng, i.e like the one which is seen on the google maps app on android, if you do a longpress we can c an image.
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Apr 6, 2010
I have an Android application that works off of a smaller database, around 300 entries. To view the database, I have created a custom view that contains individual rows of data. Then I query the database, and add each line to a newly created custom view.
The problem is that it takes a little white for all of this to be created/loaded, so when you open the application, it sits for a few seconds.
How can I load one line of data, then display it, then the next, append it, etc.?
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