Android :: Make ListView Scrollbar Expand Whilst Scrolling?
May 13, 2009
I'm having a little problem with a ListView scrollbar. The scrollbar appears at the side as expected, but how do I get the scrollbar to expand and become controllable in the same way it behaves in the Contact list? Ideally I'd like all the Contacts list functionality for my app - i.e. to allow me to control the scrollbar directly with a finger and to show the first letter of the list elements you're currently scrolled to.
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Nov 1, 2010
I want to hide a listview's scrollbar when the listview isn't scrolling and show it when scrolling. I know this can be done very easy by setting "android:fadeScrollbars" as an application style if the API is 5 or newer. But I want the feature to be available on all android devices. So I've implemented the "setOnScrollListener" method, and switched the scrollbar visibility using the setVerticalScrollBarEnabled method. This works great on G2. The problem is that on Motorola Milestone the SCROLL_STATE_IDLE event isn't received when the scrolling stops, and so the scrollbar remains visible.
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Oct 20, 2009
As a work around to the issue where a list item isn't focusable if it has a focusable child item (a comment by Romain Guy was that this was intended behavior, for accessibility reasons) I simply filled the listItem with two children, each of which is focusable - There's nowhere to directly touch on the listItem anymore, just it's children.
For the most part this is a useable workaround, effectively invisible to the user, except for one thing- Although you can scroll by swiping without issue, touching to *stop* the scroll no longer works- I imagine because the child item is capturing the touch event and not passing it to the parent listitem, at least while the scroll is in effect.
Is there a known workaround for this? Perhaps someway to "pass the baton" of the touch event back up to the parent listItem, or a way to change my design?
BTW- I know there's some built-in functonality for single/multiple choice listviews (checkbox listviews) - That doesn't actually help in my case. The app is a contact list, and the row children are a relativelayout (populated with contact info) and a clickable phone icon (a one-touch dial for the contact), which needs to be visible or invisible depending on whether the stored contact has a phone number.
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Jun 2, 2010
I need to implement a screen having around 1000 thumbnails. This screen should support gesture based scrolling as well as fast scrolling using a scrollbar with thumb. So if user want to move from page 1 to page 100 he can just drag the thumb and reach there. But there is no such control in Android. There is seek bar but its look and feel is not similar to what I want. I also want to flick and swipe functionality which can be inherited using horizontalscrollbar. So i want to add functionality of horizontal scroolbar as well as of seekbar in my application.
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Aug 24, 2010
The problem appears in Android 2.2. It seems cool because it can auto-hide.But I don't like it quite much because the bar is an indicator for "Whether there is more content not present on the widget". Hiding it maybe neat, but may get the users wrong sometimes. In ListView, I find it a fatal bug at all. When there is more content to show, no scrollbar present, AND when wipe the screen down-wards, no scroolbar appears. Only when use the traceball or Dpad to move focus, there appears the scrollbar. BUT THERE IS WORSE: when you wipe down-wards to move the scrollbar down, nothing happens! The touch feature is almost disabled here.
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Dec 22, 2009
I want to create the following layout:
Section '1' is linear layout contains imageview and textview
Section '2' is listview with customze items list
I want to place both components under single verticle scrollbar, means i do not want scrollbar only for listview, currently i am achieving following layout through placing things in tableview but i want functionality like listview items..
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Nov 16, 2009
How can I autohide scrollbar in ListView? I thought there would be an autohide attribute for ListView but there isn't. What I want to do is scrollbar is hidden at first when I touch the listview, scrollbar appears 2~3 seconds after the touch off, scrollbar disappears again.
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Oct 6, 2010
Threre is a unique resquirement for my project.
I need to create a custom scrollbar for a listview.
I can do this task by setting drawable for scrolllbar.But that does not fulfill my requirement.
There are arrows in scrollbar drawable image and when clicked on them,particular list item should get selected.
So I need to use custom scrollbar for this requirement.
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Aug 23, 2010
Basically I am trying to recreate the default contact screen when you click on "+" button another row of Phone number added to the list. Right now I have an ImageView as the "+" button and a ListView to contain the list of phone numbers. The problem is that the ListView doesn't expand when I add more item into the list. I could build the same look with LinearLayout but how can I save all those numbers that way? Below is the layout of the item that will be inflate with custom Adapter:
<?xml version="1.0" encoding="utf-8"?> <TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="60px"
android:stretchColumns="1" android:background="#FFFFFFFF"
android:gravity="center_vertical"> <TableRow>
<Button android:id="@+id/type" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:paddingLeft="10dp"
android:text="Home" /> <RelativeLayout android:layout_width="fill_parent"
android:layout_height="wrap_content" android:paddingLeft="10dp"
android:paddingRight="10dp" >
<EditText android:id="@+id/value" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_alignParentTop="true"
android:layout_alignParentLeft="true" android:text="" android:hint="Name"
android:lines="1" android:textSize="10pt" android:typeface="sans"
android:textColor="#FF000000" android:gravity="left" /
</RelativeLayout> <ImageView android:id="@+id/del"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_alignParentRight="true" android:layout_alignParentTop="true"
android:paddingRight="14dp" android:src="@android:drawable/ic_delete" />
</TableRow> </TableLayout>
This is the ListView portion.
<ListView android:id="@+id/phoneList" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:background="#FFFFFFFF"
android:scrollbars="none" />
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Nov 12, 2010
In my app I have nice ExpandableListView. I would like sometime, depending of situation, to expand some or all groups. I would also like to be able to remove/hide groups, expand all and basically have (visually) ExpandableListView without groups. I looked at all available methods for ExpandableListView and couldn't find any that would do what I want to do.
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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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Oct 3, 2010
I have a list view which uses a custom adapter in order to show my custom content. Its layout is the following.
CODE:...............
I would like that the listview only showed the view with the ids itemimage and item description, keeping the itemtext hidden.
The idea is to have an onclicklistener on each item of the list, in order to expand that item so it shows the itemtext content. I know I should use Tweening animation in order to expand/collapse each item, but I can't figure out how to do that.
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Feb 9, 2010
Basically, I have a custom ListView in which each item looks like:
CODE:..........
The ListView in each item is GONE by default and is set to VISIBLE when the button is clicked. Everything seems to work fine with the exception that when the ListView is long enough to scroll, it is just kind of truncated. http://img38.imageshack.us/img38/3269/listviewproblem.png
Is this a problem with the maximum height of an individual list item? Is there a way to force the list item to expand and force the child listview to expand to show all children?
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Jun 12, 2009
Anyone please help me with some code snippets to slove the problem.If anyone knows how to make an adjustable gridview please help me.
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Jul 7, 2010
I'm trying to make a layout that is something similar to how the android market is...where say under comments there is what appears to be a ListView but it does not scroll (the whole page scroll but not the comments). I'm not sure if its even a ListView but I want something that looks like the list view (ie. have those divider bars and what not but NOT SCROLLABLE). There are people suggesting to use a LinearLayout instead of a ListView but I also what the items to be clickable and open a new activity. Please help?
My current layout tree is like so
<LinearLayout>
<ScrollView>
<RelativeLayout>
I am looking to put content inside the RelativeLayout.
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May 22, 2010
I have a ListView with custom rows. When any of these rows is clicked, the ListView's data is regenerated. I'd like the list to scroll back to the top when this happens.
I initially tried using setSelection(0) in each row's OnClickListener to achieve this but was unsuccessful (I believe because the ListView loses its scroll position when its data is invalidated - so my call to
setSelection is undone. I still don't understand how the ListView decides where to scroll to after invalidation, though).
The only working solution I know of was given by Romain Guy here: http://groups.google.com/group/android-developers/browse_thread/thread/127ca57414035301
It involves (View.post)ing the call to _listView.setSelection(0). I found this to perform quite poorly.
The newly generated list shows up with its scroll location unchanged and there is a considerable delay before it scrolls back to the top.
Is there any better way to achieve this functionality?
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Aug 19, 2010
In one of my projects I've got a ListView with hundreds of elements. But when scrolling through this list I get the following error:
CODE:.....................
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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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Oct 12, 2010
I am having a customized list view in my application, which is showing an image and text.
The Image I am getting from URL, using the code below:
CODE:..............
All is working perfect, except the list view scrolling, its very slow. If I disable the images, the scroll speed smooth-ens , but with the image enabled, it lags alot.
Is there any possible way I can reduce or remove this lagging?
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Dec 24, 2009
I would like to have a ListView that scrolls in a carousel way, so when you scroll to the bottom and continue scolling, it should get back to the top element.
I do not want to use ViewSwitcher, nor ViewFlipper. How can I achieve that?
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Jan 29, 2009
I'm having problems with ListViews in my application. I thought everything was fine until I noticed that if I scrolled up and down through the list quickly a number of times, sooner or later the app would crash with an OutOfMemoryError.
When I searched for the error I noticed a number of posts related to loading images. As my list items included a small arrow png, I assumed the problem lay here. However even after removing this and all other drawables I had (gradient background and list separator) the problem still remains.
Here's the stack trace
CODE:...............
I've had a look in DDMS and noticed that the percentage memory used in the heap doesn't go above 70%. Also, doesn't the reported 66K seem like a very small amount to be causing a crash?
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Apr 24, 2010
I want to disable scrolling only of a ListView and keep it's items to still be click-able.
The idea is to control the scrolling via other means and not user touch. i.e. up/down buttons, or random scrolling...
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Aug 5, 2010
I have a scenario, where I have three buttons(like tabs) and when clicking on each button, I am showing a listView, such that, I select one button and scroll the listView. During scrolling if I click on any other button, that list is also continue scrolling. Actually, I don't want the scrolling
When I click on any other button, it should not scroll and it should be in the starting position(means index 0).
I tried onScrollChangeListener(), in that onScrollStateChanged() is there.
I tried putting setSelection(0) in SCROLL_STATE_FLING & SCROLL_STATE_SCROLL state.
Its going to index zero, but continue from there, its still scrolling. How can I stop this scrolling.
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May 31, 2009
I want to lock the scrollBar of ListView.
I have tried to use some ways, but these all are not avairable. - ListView.setEnable(false) - implemented return false of areAllItemsEnabled() / isEnabled() of Adapter. - set to none attributes android:scrollbars of ListView of layout.xml
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Mar 18, 2010
I'm completely stumped on this one. I have three different lists that need to be displayed on the screen.
I've tried using a ScrollView with a LinearLayout child, and putting my ListViews in the LinearView, but all of the ListViews lock to a fixed height with scroll bars. Using other kinds of Layouts means no scrolling.
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May 17, 2010
In the new official Twitter app, the scrollbars in all the ListViews the app uses are hidden unless the user is scrolling through the list.
When you start scrolling, the scrollbars appear. When you stop, they fade out with an animation until they are gone completely.
I can't seem to find anything in the documentation that indicates this as being a standard feature.
Is this something included in the API? If not, anyone know how this might be done?
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May 14, 2010
I have created a specific List which exists out of the following elements to create a scrollable list with every row containing a Image on the left side and some text on the right side.As long as the screen is shown statically (as in no movement) it will be shown correctly, but when I start scrolling through the list the background of the row-item (an "icon" as can be shown in the code) will be shown corretcly but the background of the "root" layout will become completely black when the scrolling stops the background will, most of the times, get back it's color.As I test I also added a TextView in that root-element with the same background, this one will detain it's color when the List is scrolled.
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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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Sep 25, 2010
I found a error that I dind't know about, Iam using a List, when Iam scrolling down to the bottom of the list it thows an error, why does this occur? Iamgeting the items from a service, and everything looks fine inte listview.
CODE:.................
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Aug 13, 2009
I have some problems when creating a ListActivity.
I have a listview and some other widgets and my listview is filled with a custom adapter.
You can see the images of this activity here:
http://www.grabup.com/uploads/ecd0d0eeb7b947e98b2e0d6c1be5478f.png?di...
Now the problem is. I have a scrollview and all the other views and widgets are placed inside of it. As you can see on the image, I don't see all of my 6 comments (that is the list). When i don't place the scrollview the height of the list is perfect (i have set android:layout_height to wrap_content (to my listview and parent LinearLayout). This is perfect but I have other widgets under the list and when the list reaches the bottom of the screen I can't to scroll to view my other widgets..
How can I fix this? I can set the height of the linearlayout manually but the problem is that the height doesnt has to be the same all the time (it loads the commens from my web service).. It has to fit the height of all the comments (like wrap_content normally does..)
Here is a part of the code with the layout and listview..
CODE:............................
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