Android :: Maintaining Scroll Position Of ListView

Apr 7, 2009

In my app, my main class extends ListActivity and calls a fillData() function to reload the list whenever changes are made. I'm still getting the hang of this, so I borrowed that concept from the Android Notepadv1-Notepadv3 tutorials. Everything works great, however whenever I need to change the list (remove an item, re-sort it, edit an item), the ListView refreshes and loses its scroll position. The scroll position is reset to the top after each fillData() call.

It appears to be resetting the scroll position to the top because I'm using setListAdapter() each time in fillData(), setting it to a new SimpleCursorAdapter. How can I get the list to "update in place", where the scroll position is seamlessly maintained to the user? I tried heading down the "items.changeCursor(cursor)" path, but that didn't seam to do much for me.......................

Android :: Maintaining scroll position of ListView


Android :: Set Scroll Position Of ListView?

Jul 30, 2010

I have a listview displaying my data.Ok. I want to set the scroll position in a position of my choice, but I just cant do it. I used :

myListView.setSelection( anyPosition ); myListView.setSelected(true); and has not worked. I also tried : myListView.scrollTo(0, PositionY); and myListView.scroolBy(0, PositionY);

and there's a strange behavior, this two methods doesn't put the scrool in the "PositionY", it made the "PositionY" be the first position in the list, cutting everything that exist before.

View 3 Replies View Related

Android :: Scroll To Position In ListView

Jun 10, 2010

I have a long listView that the user scrolls around and then returns to the previous menu. What I want is that when the user opens this list View again the list to be scrolled to where the it was previously left. Any ideas on how this can be achieved ?

View 2 Replies View Related

Android : Detect Scroll Position Inside A ListView?

Oct 10, 2009

I'm building a chat room application where new events are being polled for every X seconds. Every time that happens, this code updates the RoomAdapter (a custom subclass of ArrayAdapter) with the new data and scrolls it to the bottom:

RoomAdapter adapter = (RoomAdapter) getListAdapter();
for (int i=0; i<newEvents.size(); i++)
adapter.add(newEvents.get(i));
getListView().setSelection(events.size()-1);

This is fine, except that if the user is scrolling up to glance at the room's history, it's going to jump her down to the bottom when the poll happens. What I'd like to do is have it so that if the user is already at the bottom of the list, it stays there after a poll for new events. If the user's intentionally scrolled upwards, I'd like the user not to be disturbed.

How do I detect when I'm already scrolled to the bottom of a ListView?

Note: I can't do getListView().getSelectedItemPosition(), because as the docs note, calling setSelection when in touch mode does not actually select the item, just scrolls to it.

View 1 Replies View Related

Android : Setup ListView Scroll Position Nicely In Droid?

Jul 22, 2010

I am aware of setSelection(), setSelectionFromTop(), and setSelectionAfterHeaderView(), but none of them seems to do what I want.

Given an item in the list, I want to scroll so that it is in view. If the item is above the visible window of the list, I want to scroll until the item is the first visible item in the list; if the item is below the visible window, I want it to scroll up until it is the last visible item in the list. If the item is already visible, I don't want any scrolling to occur. How do I go about this?

View 1 Replies View Related

Android : Can I Scroll Position In BaseAdapter?

Mar 9, 2010

I am using BaseAdapter for displaying the list. This list is fetched by calling a Web Service. At a time only 20 records are returned. Now, when the scroll of the BaseAdapter reaches the last record then the application should fetch more records from the server.

So, what I want to know is how to know the scroll position or some other way of knowing that the last record has been reached so fetch more records from the server. I don't want to implement the next and previous button on the screen.and so am trying to implement it in this manner.

View 2 Replies View Related

Android : Way To Get Scroll Position Of A WebView

Mar 16, 2010

I'm new to Android. I would like to simply know where on a page the user has scrolled. When a certain point on the web page appears at the bottom of the screen, I want to trigger an event. But this code causes an exception. I know that WebView inherits getScrollY() from View. Am I not implementing it correctly?

View 1 Replies View Related

Android : Get Scroll Position In A List Activity?

Mar 23, 2009

I'm trying to get the scroll position on a ListActivity. Here is what I'm trying to do: I have a list activity that is populated from an XML file. Another thread downloads all pictures so the user can see the list while the thread is still downloading the files.

What I'm trying to do is when the thread finishes getting all pics it reads the listview scroll position, refresh the listview and scroll to that position again.

ListView main = getListView(); <-- not sure if I'm really getting the ListView this way. int scY = main.getScrollY(); Log.d("Scroll", scY + " "); <--- this is printing zero even when at the moment I run this I already scrolled the list. setListAdapter(listadapter); main.scrollTo(0, scY);

View 10 Replies View Related

General :: Scroll Position In Android Market?

Aug 11, 2012

Whenever you search for an app in the Android Market, click on one and realize its not the one you wanted, you click back but then the scroll position gets reset and you're at the top of the search results. This is even more particularly annoying whenever you look through your previously installed apps on the Android Market and try to re-install some. Its not fun having to scroll 5 pages each time.

View 2 Replies View Related

Android : Save Scroll Position - When Activity Returns?

Jul 8, 2009

How can I save and load the scroll position of a listview that is destroyed/hidden/paused.

View 3 Replies View Related

Android : How To Get Scroll Position In A GridView / GetScrollY Always Return 0

Jul 24, 2010

I have a GridView in my activity, and I want to save current scroll position while user goes to another place and restore it while user comes back. I try to use GridView.getScrollY and GridView.scrollTo methods, but getScrollY method always return 0 instead of right scroll position. Am I using this method in a wrong way?

Could anyone who can teach me how to retrieve the scroll position in a GridView?

I searched the Internet found that someone said we can use getSelectedItemPosition and setSelection methods, but this requires user to select at least one item, how about the case that no items is selected?

View 2 Replies View Related

Android : First And Last Position Of Textview From Horizontal Scroll View

Aug 26, 2010

I have a horizontal scrollview with text fields,here i need to get the first and last position of textview when i scrolled it,how can i get the position of textview when i scrolled.and also need to know how to set color for text when i clicked the particular text from this. sample code....

View 1 Replies View Related

Android :: ListView Jump To Cursor Position

Aug 10, 2010

I have a ListView that is controlled by a standard BaseAdapter.When the user clicks a button, I want the ListView to Scroll into view the 100th record.How is that done?

View 1 Replies View Related

Android :: ItermId To Position In A ListView/Adapter

Jan 7, 2010

In a ListView/CursorAdapter, it is easy to go from a position to an itemId

CODE:..........

Is there any way to do the reverse mapping? From an itemId, get its position in the list?

View 2 Replies View Related

Android :: ListView Header Taking Up A Position?

Oct 26, 2010

I've just added a header to my ListView and I have to change a bunch of code because the header essentially becomes position 0 (Meaning the Cursor indices of my CursorAdapter do not line up with the indicies of the list. They are off by 1 now). Why? This seems a bit silly to me.

The only reason I can come up with is that a developer may want to access the header. Fine. Provide something like getListView().getHeader().

View 1 Replies View Related

Android :: ListView - Index And Position Behavior Upon Restart()

May 19, 2010

I am using a ListView with an ArrayAdapter that holds objects. When I select an item, I am capturing the position and index of the selected item. If I scroll down prior to selection, the position and index represent the location of the item in the list. Selecting that items takes me to another activity. When I use the back button to return to the list, it seems that the ListView gets a new position and index for the visible items.

As a result, I can't figure out how to reference the selected item during the restart() of the ListView Activity. I have tried to capture position and index, but as I've said, they change upon returning to the Activity.

Is my understanding of the ListView "redraw" correct? Does it renumber my items based on what's visible? -When in the life cycle is getView() called? Is there a way to force an update to the ListView so that my captured index still points to the same object?

View 1 Replies View Related

Android :: Move To A Certain Position In A ListView Upon Creation In Droid?

Apr 21, 2010

I was wondering if it is possible to start a ListActivity and in real time decide how far down the list it should be focused on. (Example: When the activity is started it checks for certain conditions and then it may scroll down to a row partially through the list.)

View 1 Replies View Related

Android : Maintain Position Of ListView / Another Intent And Back

Apr 27, 2010

How can I maintain the position of my ListView in my activity when I go to another activity (by launching another intent) and then come back (press the back button)?

View 2 Replies View Related

Android :: Position Of Child View In Horizontal Scroll View

May 18, 2010

I have a HorizontalScrollView with a series of CompoundButtons. I want to find the (x,y) for a given child view. I have tried using:

getLocationOnScreen()
getLocalVisibleRect()
getChildVisibleRect()
like this:
View tmpView = this.findViewById(viewId);
Rect hitRect = new Rect();
tmpView.getLocalVisibleRect(hitRect);
the hitRect is always 0,0 - 0,0.

I need the x,y mainly to scroll to a particular child view. Any help is greatly appreciated.

View 1 Replies View Related

Android :: ListView And Other Widgets Scroll As Whole

Jul 23, 2009

- 2 input boxes where the user can enter criteria to search for - 1 search button - when the search button is clicked, a search is performed and on the same page the matches are shown *below* the 2 input boxes and search button. - the results can be quite a few (say up to 50), which won't fit all on the viewable part of the screen, so the user has to be able to scroll down in the results. - when the user scrolls down over the results, the 2 input boxes + search button should of course also scroll up out of sight.

Basically the behaviour you get when you for example do a google search on google.com. But, for clarity: I don't want to use the WebView. Note that there should be no scrollbar for the results only (that can be done easily with a standard ListView), the all needs to scroll as a whole. The reason I want this behavior is that I don't want to direct the user to a next screen with the search results; that would be so annoying having to go back to the "search" screen all the time if you want to enter another search criteria, like if you figured out you made a typo.............................

View 5 Replies View Related

Android :: Horizontal Scroll In ListView

Mar 26, 2010

I would like to catch horizontal scrolling in ListView. I don't wont to scroll ListView content, I need an event only. I use GestureDetector, and in onScroll() method I can figure out when user scrolls in horizontal direction. This part works. But my problem is ListView fires onItemLongClick event also. I need this event, but only if user doesn't scroll. If user scrolls in vertical direction, ListView doesn't fire onItemLongClick event. I need the same behavior for horizontal scrolling also.

View 2 Replies View Related

Android :: ListView Scroll Up / Down Without Gestures

Nov 5, 2009

I'm trying to scroll the ListView up/down actions by pressing a button, instead of using finger gesture. It looks like the super class AbsListView.onTouchEvent(MotionEvent ev) handles all the scrolling up/down motion and animation. So if I want to scroll the list by pressing a button, I don't really have a MotionEvent to pass onto onTouchEvent method for it to work. I tried ListView.scrollTo(x,y), it kind of works but the hidden part of the ListView is not rendered when shown on the screen. I am trying to re-draw the list by using: ListView.invalidate(), ListView.invalidateViews(), list.adapter.notifyDataSetChanged()

View 3 Replies View Related

Android :: View And ListView Scroll At Once?

Oct 22, 2009

What I have now is a layout that includes a list view at the bottom. All of the items in the layout above the list view remain fixed as you scroll through the list view. I would like the entire page to scroll so for example when you reached the bottom of the list you would no longer see the items above the list view.

View 5 Replies View Related

Android :: Scroll Speed Of Listview

Apr 24, 2009

Get scroll speed of Listview, Ivan Soto Fernandez Web Developer

View 4 Replies View Related

Android :: Scroll Two ListView In Layout

Sep 29, 2010

I have 2 ListView in a layout. I want each ListView show all their items. And scroll the whole layout.

View 1 Replies View Related

Android :: Get Rid Of Shadow When I Scroll ListView?

Jul 10, 2010

How can i get rid of the shadow when I scroll ListView.

I have shadows appearing on top and bottom of the list.

View 1 Replies View Related

Android :: Listview Background Image Changes On Scroll?

Apr 30, 2010

I am developing an android application where I need to manipulate the background image of the rows in listview on certain conditions. Initially when the listview is loaded all works properly. But when I scroll down to the listview and come up again the background image changes. Can someone tell me the reason why its happening so? Hope to get the reply soon.

View 6 Replies View Related

Android :: Saving ListView Scroll Location?

Jan 20, 2010

I'm trying to figure out how to save the location my ListView is scrolled to. Currently I am saving the ArrayList of the ListView. When the user comes back to the screen I reload the ArrayList but can't figure out how to make it scroll to the last location.

View 3 Replies View Related

Android :: Scroll Listview To Focus Particular Element?

Jan 30, 2009

I'm trying to scroll my ListView (from an Activity) to a particular element in the list. I know it's position in the list. How is this possible?

View 4 Replies View Related

Android :: ListView Scroll In Touch Mode?

Feb 18, 2009

i'm rearranging items in the list by dragging the item. I'm in the touch mode and want to scroll view couple of items then i'm on the last/first visiblePosition. Since i'm in the touch mode setSelection is useless. How i can scroll a list in the touch mode. For drag i'm using onTouchEvent , onLayout to change background for the current item + some stuff in adapter to make a swap.

View 3 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved