Android : How Can I Maintain ListView Item State?
Oct 6, 2010
My ListActivity is bound to an ArrayAdapter where I have overriden the getView() method. If I change the visibility of a widget in that method or modify the view's background color, those changes somehow get lost once that modified list item returns after being scrolled off the screen. In fact, some other view in the list is picking up the changes. How do I get the modified view to look the same when it's redisplayed after scrolling?
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Jun 28, 2009
If you derive a class from ArrayAdapter for the purpose of customizing the views of listview items, and you vary the background color of those items by doing something like this in getView()...
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Sep 29, 2010
I'm new to android, please help me how to save the state of checkbox,
i.e.
I've ListView with checkbox, three textview and again checkbox. I wish to save the checked state of item(s),
how to save the state of checkbox.
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Nov 9, 2010
This usually happens when the user hits "Home", does something else, then eventually wanders back into the app - it attempts to go back to where it was before, but the application Context has mysteriously lost all its previously-saved state information (in my case, a few integers and a few Strings). I know this is a very vague question, but are there any cases (other than the user using "back" to back completely out of the application) where the application Context gets completely destroyed even though the application is not terminated? Is there a better way to maintain persistent state information?
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Apr 8, 2010
I am working on my App. in between i pressed the Home button on the device. my app will go to the background tasks. After that i long press the home button it will show my app as a persistent state. i.e where and what i had done in my app. But i click my app in the directory window it restarts my app. i want to do if my app is in the background tasks it will wake up else it will start. how to achieve that?
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Oct 5, 2010
I have created one custom view that contains the horizontalscrollview. Now when i changes the orientation its scroll state change to 0 every time. I got the previous scroll state by using onSaveInstanceState(Bundle savedInstanceState) and onRestoreInstanceState(Bundle savedInstanceState) . in onRestoreInstanceState i am using following method to get reposition the scroll, hoz_scroll.scrollTo(hoz_x_pos, hoz_scroll.getScrollY());
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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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Jul 24, 2010
I have a gallery that displays TextViews where the background of each view is the following code...
This selector work just fine for the state_pressed and default (idle) states, but the selected item state is never displayed. I REALLY do not want to force the background of the selected item by changing the background of the view when the onItemSelected event is called. What is the correct state or correct way to get the TextView background to be set properly. Is the selected (center) view in the gallery not really selected? Is there some other state I should put in the selector drawable xml?
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Oct 5, 2010
Any one knows why my ToggleButtons won't keep their states in a ListView?
Each list item includes a ToggleButton - when scrolled off from the screen their states are reset to unchecked...
I presume getView() is called once they're visible; however I'm not re instantiating them anyways.
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Apr 30, 2010
I am facing a very mysterious Problem. I am using a ListView with CheckBoxes that can be clicked to select people. The row layout is the following:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <CheckBox android:focusable="false" android:onClick="onSelectPerson" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" android:layout_marginRight="5dip" android:layout_marginLeft="5dip"/> <TextView android:id="@+id/person_name" android:text="test" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" android:textSize="18dip" android:layout_marginLeft="5dip"/> </LinearLayout>
As long as the amount of rows doesen't exceed the screen size (-> no scrolling) everything works just fine. But as soon as I have more rows then the screen size (-> some rows are hidden and have to be scrolled to). I have a very mysterious phenomenon: If I check the top row and scroll down some of the previously hidden rows are randomly checked too. If I scroll up again, again some of the before hidden rows are randomly vhecked (the CheckBox I clicked in first place may or may not still be checked). Also the registered onSelectPerson callback is only called for the CheckBoxes I really click. The other CheckBoxes just change their state to "checked" without calling the callback method. I have the same phenomenom on the Archos IT 5 and the Nexus One. This must have something to do with the ListView implementation but I can't quite figure out what the problem is.
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Sep 21, 2010
I've list view item as a object, I want to fetch item details as web to show.
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Sep 6, 2010
I was curious if there was a way that I can assign each menu item in a ListView its ID from the SQLite database, so that when I do something like onClick, or using a ContextMenu, I can tell what item / row I am referencing to.
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Jun 21, 2010
I have an issues, I want to show 20 items in the list.
But there is a catch: if the user scrolls down to the bottom of the list, there will be an item that says: "Show more items", and when the users click on it, more items will be added to the list.
My question is how is poosible to have a last item, that has a different style and looks different: and does different things,(I think this is used in QuickSearchbox)
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Jul 2, 2010
Now i want the first item of the list to be automatically focused when i launch the application How can i set the focus on any item of the list when i click on the some other view for example a button?
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Apr 23, 2010
I'm writing an app with ListView layout and i want to add to any line in this ListView CheckBox. How can i do this?
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Sep 26, 2010
I would like to change the background color of a ListView Item after it has been touched until a further event.
This is my code:
CODE:............
Changing the background color of view yields weird results.
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Jun 3, 2010
I thought I could use the position int, but when I click on the item in the list view, nothing happens. Please help. Code...
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Jun 8, 2010
I'm using a custom view to display items in a listview. For some reason every time the list is populated; the first item is shown as selected (ie; orange highlight). I've tried everything I can think about to solve it; any ideas?
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Jun 24, 2010
I have a listview which has a bunch of selections. I want to keep the focus on the listview in touchmode and get the item selected. What is the best way to do that?
I found this blog:
http://bestsiteinthemultiverse.com/2009/12/android-selected-state-listview-example/ and
http://developer.android.com/resources/articles/touch-mode.html
What does the community suggest?
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Aug 14, 2010
This is my list view item: I want to put an OnClickListener on the Checkbox. But I need to get the list item that the CheckBox is in, via row id. How can I do that in the onClick method.
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Sep 11, 2010
I need to get the selected Item from a ListView in adnroid .
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Sep 14, 2010
Please Help me for getting the selected Item from a ListView. Items for the ListView are getting from a xml file. Elements of the ListView are filled up by the adapter(adpter contains ImageView and textView). I only need the TextView content from the ListView.By using the onItemClick i get only the index of the item.
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Aug 2, 2010
I am trying to make a listview with icon in every item of this list view. i mean i want to put an icon in every item of listview. please let me know wot should i do for that.
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Jun 1, 2010
I'm wondering if it is possible to rerender just one element in a listview? I assume by calling notifyDatasetChanged() is gonna rerender the whole list?
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Feb 3, 2010
I want to remove the first line from my ListView.
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Aug 27, 2010
When I have a list view and there are 3 items which can choose by user, I wanna show only choosable items to user because of some reason. but I could not find any method in ListView or ArrayAdapter class. Is there a solution? Code...
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Jun 18, 2010
I am trying to create custom background selector for my ExpandableListView. It works fine for all states other than focused. I am unable to identify which row is currently focused. Here is the code...
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Feb 3, 2009
Is there a way to show that a WebView item contained as a item in a ListView is selected? Right now the WebView does not seem to display its contents transparently like every other control so it takes up the entire view and does not show its state as selected.
Also, when the content of the WebView is selected, scrolling down with the track back does not seem to cause the WebView to loose focus. If I continue to scroll down with the track ball, all of a sudden an item in the middle of the ListView gets selected.
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Oct 7, 2010
I'm facing problem in scrolling. I've 20-25 items in my List, if i checked first check box, scroll down, then come up, my checked status lost (becomes unchecked), in cursor adaptor. If i use base adaptor problem is resolved but major issue with base adaptor is performance, if my list goes beyond the 100 items.
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Nov 14, 2009
As I mentioned in the email subject, I want to select an item (e.g. Department of Human Resource Management) in my ListView. And you can see that: I had try to use setClickable(true), setChoiceMode(ListView.CHOICE_MODE_SINGLE), setFocusable(true), setFocusableInTouchMode(true), no matter I use touch screen to click on the item or use the scroll ball on my mouse to select the item, it also doesn't work. Is there any mistakes in my coding? I hope someone can give me some ideas what I should do. because I am a beginner for developing Android application.
And the following is my coding: package com.example.abc;.............
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