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().
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Jun 24, 2009
There must be a way to do this. How can you tell a ListView that has a header to not scroll it when the user scrolls the contents? I want it to stay in a "stuck" position so that the user can always see what column the content applies to.
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Nov 20, 2009
I can add a header to my listview within another activity with: list = (ListView) findViewById(R.layout.list_view); View v = View.inflate(this, R.layout.skill_list_header, null); TextView t = (TextView) v.findViewById(R.id.skillHeader); list.addHeaderView(v); this doesnt work however for ListActivity. Can any one add some insight to this? Sorry if this is obvious.
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Dec 30, 2009
I want to display Header to my ListView. I used getListView ().addHeaderView() method to add header to Listview. but this is Header is scrolling with List.I want header should be constant.
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Jun 12, 2010
I have a ListView with several columns and I need a header row at the very top that labels each of these columns that *does not* scroll with the rest of the ListView. I am using addHeaderView right now, but I've ran into 2 problems:
1) The header scrolls. I need it outside of scrolling so that it's always "floating" on top.
2) Each column in the header isn't lining up with the columns in the listview. I can make the header columns and data columns all line up perfectly if they're all in one big TableLayout, but how would I get the header to be outside of the scrollview yet also stay uniform and inline with the data columns?
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May 26, 2010
Is it possible to add header or footer views to a ListView by just defining them in the layout XML code? So without having to inflate the views and call addFooterView() or addHeaderView() manually?
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Jul 26, 2010
Is there any way to set the background color of a ListView header? I've tried calling setBackgroundColor on the header view, and I've tried android:colorBackground in the xml.
Also what exactly is the difference between a ListView header and a standard item in the list. I notice that by default a header can be selected, which makes me think there is no difference.
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Jun 24, 2010
I have a multi-column ListView with three TextViews. I need to have header for each of the column. I am using Android 1.5 SDK.
I can't use addHeaderView since it adds just one view which would contain just one title string.
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Nov 24, 2010
I have a list view , where i am adding headerview to that list . every thing fine , but when am scrolling list headerview also moving with list, so i want to avoid headerview scrolling , i mean i have to scroll only list when i list reached to topview (titlebar),headerview has to remain bottom of titlebar .
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Apr 7, 2010
Is it possible to control the height of a ListView's header view(s)? If I try containing my header view in a layout and set the height to say, 50 or 100, the height in the view seems to stay around 30.
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Dec 18, 2009
I have a ListView with a header and I am able to click the header as if it was a list item however there is no highlighting if it receives focus from the trackball/D-Pad. Basically I want the header view to operate exactly as if it were just another list item in the ListView. Is there a way to do this?
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Nov 22, 2009
I'm having a little difficulties while trying to get a certain layout to work: I want to have list. List does not have to be scrollable, but should be shown completely. But the page itself should be able to scroll (with the lists in it), if the total content ist higher than the screen.
CODE:.................
It only uses a small part of the screen (about 2 lines per list), instead of filling the available height, and the lists themselves can be scrolled. How can I change the layout to always show the whole lists but have the screen be scrollalbe?
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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.
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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 ?
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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?
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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.......................
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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?
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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?
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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.)
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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)?
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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.
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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?
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Jan 6, 2010
I have touched on this question here, where Christopher gave an answer to this, but I dont really get it so I thought its time to make it a real question, not just a "follow up" =)
As it stands, the application Im writing has 4 different screens:
1. Screen 1 - list of nodes (main screen)
2. Screen 2 - options menu, tableLayout with buttons
3. Screen 3 - navigation
4. Screen 4 - text details on version etc
These screens can be navigated to/from using a "header" View that is placed on top. the header then has 4 different buttons:
+--------------------+
| menu with buttons |
+--------------------+
| |
| |
| |
| C O N T E N T |
| |
| |
| |
+--------------------+
The header is just an XML-file (header.xml) with a few buttons. That header.xml is the included in the Layouts using the include-markup. For example, the main.xml has the line:
<include layout="@layout/header"></include>
The header show up alright, but the question is - what is the correct approach to attach OnClickListeners for the buttons in the header?
Christopher pointed out that you could create an Activity class and do the hooks there, like this:
CODE:............
First, I cant make it work since the method setupHeaderButtons isnt accessible from FirstActivity.
Secondly, is this the right way to go at it?
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Sep 29, 2010
On my htc i was looking through display, i see g sensor calibration and i perform this calibration and after i do so the screen seems to have a delay when switch from the horizontal position to the vertical position. its weird because when i switch to the phone horizontally it switch normally and responds fast. but when i switch back to vertically it takes almost 7 seconds to actually switch back, sometimes it switch within 2 or 3 secs but never as quick as switching horizontally.
MQuote:
Originally Posted by Rigmaster
Make sure you have the latest updates, which impact speed on the device in some unpredictable and unexpected ways. During system updates, your Evo may reboot and will take the g-sensor changes as last calibrated.
If you're already updated, shut down and repower (soft reboot) should do the trick. I actually updated my phone and after it started to do this. I restarted the phone plenty of times i even took the battery out for 30 seconds. It only does it when im texting on the browser, basically everything but the camera. He camera screen rotation is perfect. I even rooted the phone but i havent figured out how to use the root to fix the problem. Should i do a firmware update? Because i just did the htc software update.
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Sep 16, 2010
I write file to sdcard using BufferedWriter.After that I want to overwrite header of file,but other data must be without changes( In the header I must add size of file). So I think I must change position where I need write.
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Jan 8, 2010
I have a list view and i need to add a header and footer .In the footer i need to have a button like Next to go to next page.I need it urgently.
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Oct 13, 2010
I've been looking around and have been wondering is there any way to modify the SMS header before sending it out?
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Apr 28, 2010
I am trying to implement a TextView that is serving as a header for a ListView.I want to format it so that I have basically a title centered on the first line and then additional information on the lines following. How can I format the text/string to create this kind of formatting?
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Jan 5, 2010
Is there a way to configure how the header of an alert dialog looks? It nows has an icon (on the left) with text as title. Is there a way to add view on the same line?
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Jan 30, 2010
I am Working on develop an application .In my application I want to Put application header as it look like "Android Market Application". I need help on following issues.
1)How to put all header same for all activities in the application.
2)How to put the common header like in android market application.
3)How to put a common footer for all activities in application.
If possible send source code for my understanding.
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