Android :: Playing With List
Sep 15, 2010
I have an overlay list which I retrieve it like this:
List<Overlay> overlays = mapView.getOverlays();
So in this list I have elements of the type userOverlay and picOverlay.. How can I do to erase ALL occurences of userOverlay but leave all the others? I've been playing around with the List methods but I can't make it work, I've tried:
while(overlays.contains(userOverlay)==true){ overlays.remove(userOverlay); }
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Nov 4, 2010
I am on my first Android application and I am on a timeline so details and examples will be useful since my knowledge is still minimal. I want my first screen to present the user with a list of activities to choose from. In my situation it is a recipe app where the user first chooses the type of food, such as, Beef, Chicken, or Pork. I want the application to launch an activity depending on the list item that the user clicked on. I am not sure if I should use a list view, a text view, a scroll view, a list activity, an activity group...
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Nov 24, 2010
we are wroking on the displaying of mails from an email . we got the list of emails stored . we need to show a small text screen which consists of the some content of the body when the email in the list gets focus .
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Apr 23, 2010
I'm trying to create a multiple selection list where the selection is represented graphically rather than with checkboxes.My list has checkboxes, but I want them to serve a different purpose. I'm using a cursor to hold my data and created a custom view binder for the SimpleCursorAdapter. I did this for the checkboxes and general flexibility.So far I haven't even been able to show one line as being selected. I've enabled multiple selection on the list and denied the children of the list item focusability. I've tried manually changing background color with the position fed in through the list item click listener. But the wrong items get changed and they don't even change to the right color. I've enabled touch focusability with no improvement either.Ideally, I'd like the trackball highlight focus bar to appear in multiple places. But I don't think this is possible unless you use the drawable directly. But I don't know how to find or apply it. My next idea was to have a slim view bar that changes color. But I had the same problem with the wrong item being selected so I never finished trying to guess the index position to see if this would work. My most recent idea is to completely swap out the view for another one if it's selected. But I have no idea how to do this either. I'm thinking of using an array list to store the _id s of the items that need a different view to get around the wierd selection problem. I'm also thinking of passing in the ID field as my from and the selection view as the to for my adapter. Then I'd intercept it with my binder and change the view accordingly. But once again, I'm not sure how to do this successfuly.
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May 3, 2010
I am trying to display the text from json in a list view.But my problem is that i cant figure out how to display them in list view. I also want to get only some of the text from url(for example, alerttext and date). Can anyone help me in declaring the list adapter and list view in order to display the data in the way i want.
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Jan 10, 2010
I'm trying to tackle a problem that seemingly many Android developers have, which is how to intersperse lists with non-list data, in one big scrollable pane.The model I have in mind is the screen for an individual app in the Market. You have a big description, a list of a few lazily loaded comments, and then some individual items that do different things, like visit the developer's web page, call them, etc. And then in between them all, are nice section headers.Emulating this approach seems to be extremely hard. I've read enough SO answers and mailing list posts to know not to put a ListView inside of a ScrollView, but I want the same effect without using addHeader() and addFooter() with very complex header and footer views. I've tried using a LinearLayout that I stock with views myself, but I can't get the pleasant click effects that default list items have (the orange background, white for long-click, etc.).
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Feb 2, 2010
I'm pretty new to Android dev and still working out a lot of things.I've got a main menu showing using the following code, but can't work out how to disable selected items in the menu. Can anybody help me with some sample code?
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Aug 23, 2010
I use tabs in my Android application and one of my tabs contains a listview. I'm noticing some weird behavior when I override isEnabled in my list's adapter and then try to use the D-pad to move up and down through the list and to my tabs.If the 0th item of the list is enabled, then everything works as expected - I can move down through the list, and then up again and once I reach the top of the list, pressing up moves focus to my tab.However, if the 0th item is DISABLED (isEnabled in my adapter returns false), then when I press up while position 1 is focused, the focus gets stuck. It doesn't move up to the tab as I would have expected and instead stays on position 1 of the list.
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Jul 14, 2010
By Default in the Listview,focus will come on the list item.Instead of that, can I get only the border to the list item?I can achieve this by using a transparent image as a list selector.Is there any other simplest way to achieve this requirement?
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Aug 31, 2010
I would like to after I have updated by listAdapter I want to make sure that the list is scrolled all the way to the bottom so that it displays the last element entered in the list How can I do this ?I tried this but no luck.
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Nov 3, 2010
I have lot of lists: for example: Categories, and subCategories, in my case some Categories has subcategories, So What I want to do, is if the categories has subcategories I want to clean the recently list and show the subcategories,(This can be solved by creating new activity for only subcategories, but I would say that the most of the code woyld same)I wounder how can I updoate list whit new data?If possible to add some animation when clicking, so the list goes to left when clicking, and showing data comes from right,
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Nov 3, 2010
I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).
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Sep 20, 2010
I am getting a response from xml which is dynamic in nature .After parsing the xml , I able to generate a tree view. Now , I want to convert the tree view structure to a List view which will have multiple List(list within list & so on) depending on the depth of the xml.I am aware of the ExpandableListActivity which provide a two-levels of data.In my case , it can be more than two levels of data rather it should be dynamic in nature.I need any sample code to implement the dynamic List i.e a List within another List & so on.
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May 9, 2010
An application I'm developing requires that the app main a local list of things, let's say books, in a local "library." Users can access their local library of books and search for books using a remote web service. The app will be aware of other users of the app through this web service, and users can browse other users' lists of books in their library. Each book is identified by a unique bookId (represented as an int). When viewing books returned through a search result or when viewing another user's book library, the individual list row cells need to visually represent if the book is in the user's local library or not. A user can have at most 5,000 books in the library, stored in SQLite on the device (and synchronized with the remote web service). My question is, to determine if the book shown in the list row is in the user's library, would it be better to directly ask SQLite (via SELECT COUNT(*)...) or to maintain, in-memory, a List or int[] array of some sort containing the unique bookIds.
So, on each row display do I query SQLite or check if the List or int[] array contains the unique bookId? Because the user can have at most 5,000 books, each bookId occupies 4 bytes so at most this would use ~ 20kB. In thinking about this, and in typing this out, it seems obvious to me that it would be far better for performance if I maintained a list or int[] array of in-library bookIds vs. querying SQLite (the only caveat to maintaining an int[] array is that if books are added or removed I'll need to grow or shrink the array by hand, so with this option I'll most likely use an ArrayList or Vector, though I'm not sure of the additional memory overhead of using Integer objects as opposed to primitives).
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Oct 17, 2010
Trying to implement simple dictionary. I want to make it so while the user is typing in the EditText box the list to scroll automatically to the best match. I don't want it to filter the list. For example if the user types "s" in the EditText I want the first word that s/he sees under the EditText box to be the first word in the dictionary that starts with "s." But the user should still be able to slide up and down and to be able to see the entire list of words. It is basically like a go to functionality. I used ArrayList to store my list of words. The data is in res/raw/data.xml file. Here is my onCreate method
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
wordListView = (ListView)findViewById(R.id.wordList);
myEditText = (EditText)findViewById(R.id.myEditText);
words = new ArrayList<Word>();
arrAdap = new ArrayAdapter<Word>(this, android.R.layout.simple_list_item_1, words);
wordListView.setAdapter(arrAdap); try {
InputStream inSource = getResources().openRawResource(R.raw.data);
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(inSource, null);
NodeList wordsList = doc.getElementsByTagName("eng-bg");
int length = wordsList.getLength();
for(int i = 0; i<length; i++) {
Element entry = (Element)wordsList.item(i);
Element eng = (Element)entry.getElementsByTagName("english").item(0);
Element bul = (Element)entry.getElementsByTagName("bulgarian").item(0);
Element id = (Element)entry.getElementsByTagName("ID").item(0);
String english = eng.getFirstChild().getNodeValue();
String bulgarian = bul.getFirstChild().getNodeValue();
int wordId = Integer.parseInt(id.getFirstChild().getNodeValue());
Word word = new Word(bulgarian, english, wordId);
addNewWord(word);
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}wordListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
selectedWord = words.get(pos);
showDialog(TRANS_DIALOG);
myEditText.setText(selectedWord.getEnglish());
myEditText.addTextChangedListener(new TextWatcher(){
public void onTextChanged(CharSequence s, int start, int before, int count) {
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
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Apr 4, 2010
I'd like to show another List View 'B' after clicking a item of List View 'A'. I use onListItemClick event in Android 1.6 project.
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Jun 8, 2010
Is it possible to have a horizontal list view with an vertical list view? I would like to horizontal list scroll within a vertical list scroll.
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Jan 11, 2010
I was in my jeep the other day when I heard a ad for some song and a itagging...That got me thinking. Now before the fanboy name calling starts, this is not a comparison to iPhone. I have never owned one, nor shall I ever. I think for the android based phone to compete more with the whole iphone market, I think we need to develop our own brand of iTagging, our own brand of iPhone docks, and our own version of iTunes. I understand that the iPhone has been out for a long time and has had the media market to back it up. Heres the thing. There are way more versions of android based phones that there will be of iPhones. I know that there are a lot of variations of the phones, but its nothing adapters cant fix for the docks. as for the itagging, and the itunes apps, its nothing a dev cant handle. I am not a Dev, nor am I a manufacturer, but Im sure some of us can find a friend of a friend who knows this guy that lives down the street to help out our cause...
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Aug 11, 2010
Has anyone played with this app...it funny as hell! I can't wait till me and my buddies get drunk this evening and play with this thing!
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May 22, 2009
I am using a MediaPlayer instance in order to stream audio files from an Internet location. The audio player is in a separate activity. The user can select from a list of audio files and come to this activity which plays the audio.Now the user might go back to the previous activity (with the list)and select another audio file. In this case, I want to stop any other audio that is playing and start playing the new audio which was selected.Is there any way I can know whether an audio file is playing without having to hold on to the MediaPlayer object?
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Apr 9, 2009
the opencore can not play the audio of wma. is it right? and the total time of the wma file can not be find in the trackbrowseractivity. who know why?
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Oct 26, 2009
I have a python application (anki) running under ASE. It is a simple web server that uses the browser as a UI. My only issues are playing sound, which are stored locally. On the iphone, anki uses a command line app (play) to play the mp3 files. Unfortunately, there is no command line app that I can call that takes a filename as an arg and plays it. What are my options with android?
- write a sound service that sits and listens for a filename to play; possibly listening on a port for filename
- write an Java-app that I call from within python that forks off and loads a specified file, plays it and then exits. Can you call other java apps from ASE?
- wait till the browser supports the <audio> tag. I guess this is html5, but am unaware if this will be on android any time soon.
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Jan 25, 2010
I am facing an Out Of Memory Exception while playing with the application for sometime. I looked in to HeapDump using MAT, and also monitored the heap through DDMS. But HeapDump looks good to me and DDMS heap size is well in limit. Still I am getting this Exception.
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Jun 3, 2009
I've had no trouble with playing other pieces of mp3 from a url. But for some reason when clicking this from a webview (browser) or connecting with MediaPlayer does not work. It is just a mp3 file - Try going to that file from your phone it be stuck at a infite "Connecting to stremam.esvmedia.org" loading screen. And if you try to do it through a MediaPlayer it will die on .prepare(). However if you go to that link in any desktop browser it will work fine. It does not appear to be java/flash related.
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Sep 3, 2010
Is it possible to invoke native SMIL player on Android 2.1? Can you please provide a code sample or a pointer to relevant info?
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Nov 7, 2010
How do I go about getting my app to play an mp3 (in my res) on startup? Or how how about if I wanted this to happen when a button is clicked?
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May 25, 2010
My question is : on the HTC Desire, is it possible to listen music with the default player, while doing something else like browsing the web? Because when I'm under the music player app, listening to something, and then I click (or long-click) "home" button, the sound stops. Also, while i'm listening to a track, if a phone call comes in, the music is paused, but when the call ends, the track position is lost and it starts from the beginning. Is all this normal?
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Feb 9, 2010
Does anyone know if there's an app that will play Nintendo music? The files I'm talking about are .NSF files. There's an app on WinMo that will do it but I haven't seen anything for Android that will.
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Oct 1, 2010
I'm currently using double twist, but it doesn't seem to allow you to "play all" by an artist. I need a music player that will allow me to do that. I use the phone as a "best of" since all of my music can not fit on the phone.
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Feb 7, 2009
Most of the time when I click on a link to a YouTube clip it takes me to the YouTube web page where it tells me I need to have flash installed. I'm pretty sure once I clicked a link and it gave me the option to open it in a browser or the YouTube app, but now I'm no longer getting that option. Is there a way to make YouTube videos open in the app everytime?
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