Android :: Mutiple Listviews With One Only Scrolls
Aug 13, 2010
Hello, I need to put several listviews inner a LinearLayout. The Listviews should be wrap content to adapt the listview to their items. I need have one only scroll with which I can scroll all the listviews. I know that i can't use a scrollview because the listviews have their own scroll (but i don't need the scrolls of the listviews because i have them in wrap-content). I thought maybe puting the listviews inside the LinearLayout I will hadn't problems with the scrollview, but it didn't work, the LinearLayout was fixed to the screen, the scrollview didn't appear and the listviews ended scrollable. Without the scrollview if i have the list in wrap-content, their shown properly but i haven't any scroll and i can't see the lisviews below the screen. Really i have had this bug for one month and i haven't found any solution,
My code:
CODE:............
JAVA
CODE:...............
How you can see i create the lisviews dinamically and i put indside the layout with a secttion header. if you have some doubt ask me I need find a solution soon.
Sample Image: http://www.freeimagehosting.net/image.php?6dea1468bd.png
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Nov 7, 2010
I am not very familiar with android coding so try to help me on a easy way.
The problem:
I have 2 Listviews and a onClick event handler.
How can i find out on which listview the user currently clicked?
public void onListItemClick(ListView l, View v, int position, long id) {
'Approach: if listview1 is clicked then FUNCTION1() else FUNCTION2()'}
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May 23, 2010
I am writing an application where I have to parse multiple xml files as a response from a server. Till now, I have written different xml parser classes for each xml depepending on the tags present in different xmls ?
Can I combine all xml parser classes and write a single xml parser that handles all different tags in different xmls ? Will it work ? Will combining xml parser classes add an overhead because xml parser will check for every tag irrespective of whether that is part of file or not ?
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Sep 7, 2010
I couldnt figure out the exact understanding of implicit intents.
When i was going through the tutorial i read about it.
Here are some important points to remember: 1 - Implicit Intents do not specify a target component 2 - Components willing to receive implicit intents have to declare their ability to handle a specific intent by declaring intent filters 3 - A component can declare any number of Intent Filters 4 - There can be more than one component that declares the same Intent Filters and hence can respond to the same implicit intent. In that case the user is presented both the component options and he can choose which one he wants to continue with 5- You can set priorities for the intent filters to ensure the order of responses.
I read this about Implicit Intents.
I couldnt get visualisation of 4th point. So wanted to try it out by writing some examples.
I tested this like below. Wrote two apps.
I had written two activities in one app, CallingActivity & anotherActivity.
CODE:...........
One more app,which has two activities like below.
CODE:..................
I ran the first app in emulator and pressed home screen, it mean it runs in the background.(Not exited ) Then i opened the second app and clicked a button in frirst activity(testmain) and tried to call setAction "com.android.localguide.GET_RESULT"
i.setAction("com.android.localguide.GET_RESULT");
But it is opening the activity "results".. It dint showed a options to choose which components( i expected first app ) activity i need to use ?
Am i right in executing in the right context to understand that point no 4 ?
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Jun 25, 2010
I'm new to the Android platform and recently received my Aria (coming from a BB Curve). I am impressed on how contact data from multiple sources (facebook, google, outlook, etc.) can be linked and centralized with the 'People' program...no duplicates and more info per contact.
I would like to export the consolidated contact data to Outlook.
I tried viewing all contact sources in 'People', exporting to the SD, and importing to Outlook (shot in the dark). Strangely, it only exported 1 contact from the 'Phone' source. Not the error I was expecting.
In other words, I would like Outlook to mirror the consolidated contact data in 'People'.
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Sep 30, 2010
I am having a Srollview in for my entire layout.In that i added a listview.when i scrolling the page ,tha page scrolls normally,but when it reaches listview listview only scrolls how to overcome this problem. any one can suggest the answer. I am looking that when i scroll the listview the whole page gets scrolled.
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Aug 13, 2010
I previously asked a question that I still have not been able to solve:
http://stackoverflow.com/questions/3126347/android-relativelayout-how-to-alignparentbottom-when-wrapped-in-a-scrollview
What I am trying to do is align a view to the bottom of the screen, using either a RelativeLayout or LinearLayout, and then wrap that layout in a scrollview to permit scrolling when necessary (for changes to landscape orientation or on small screen devices).
To date, what I find is that anything aligned to parent bottom works great as long at the bottom is visible...but if the bottom is below the scroll, the view that is aligned parent bottom jumps up to the top.
This seems like a very common design for ads that appear on the bottom, so I would think that this is possible. Is it?
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Aug 24, 2010
I have a webview and i wanted it to occupy the whole screen but it seems to have 7-8pix margin on the right side which is being used to display the scroll bar.
Is there anyway I can remove that margin but still display the scroll bars? I want it to do it in the way GMail app layout is done.
Here is the layout that I am using <?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><WebView android:id="@+id/web_view"android:layout_width="fill_parent"android:layout_height="fill_parent"/> </LinearLayout>
I have tried setting the layout_marginRight="-8dip" but that is a hackish way and also takes the scrollbars off the screen making them invisible.
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Aug 5, 2010
I have come across a strange bug while developing my web application. It seems as though with an input field selected, on some keystrokes, the entire page scrolls up by about 50px. There seems to be no logical pattern, ryhme or reason as to which keys trigger the scrolling jump. I am contuning to test this, but can not seem to find the source of the problem. This continues even as the input field goes off the screen. As the browser reaches the bottom of the page, it will then jump all the way to the top of the page and continue scrolling down.
A co-worker of mine said that he has seen this before but was unable to find the the cause for this problem. It only happens on the Android I am testing on.
Additional Information: I am using the Nexus One with Android 2.2. I am using the default Android Web Browser. My web page is using the jQuery and jQtouch frameworks. This only happens on this phone and does not replicate on the HTC Evo running 2.2
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Jul 30, 2010
My phone scrolls down by itself. What is the cause???
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Aug 2, 2010
I thought my phone was possessed but I know others have had this problem. I still haven't seen a fix for it though. No mater what I'm doing, my HTC Incredible will just scroll all the way to the right. If I'm in an app or attempting to type a message, the screen looks possessed with all the available buttons lighting up randomly. While this is happening I basically lose all control over my phone. I can't scroll back to the left, I can't type what I want, etc. The phone has a mind of its own! I went to the Verizon store and they said I had probably downloaded an app with a virus and they had to wipe out my phone to fix it. Well, that inconvenience did not fix the problem. Even with no "non-factory" apps installed on my phone it still scrolled to the right uncontrollably. The Verizon tech insisted that this was because I downloaded apps, but at this point there were no downloaded apps on the phone and I only download apps via the market, nowhere else.
Anyhow, is there a fix for this?
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Sep 8, 2010
I have a custom Android view which overrides onTouchEvent(MotionEvent) to handle horizontal scrolling of content within the view. However, when the ScrollView in which this is contained scrolls vertically, the custom view stops receiving touch events. Ideally what I want is for the custom view to continue receiving events so it can handle its own horizontal scrolling, while the containing view hierarchy deals with vertical scrolling.
Is there any way to continue receiving those motion events on scroll? If not, is there any other way to get the touch events I need?
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Nov 6, 2010
I got my desire yesterday and when as soon as started to use the phone, it would scroll from the home screen to the left or right. It won't stay on one screen sometimes. Other times it doesn't do this at all. When it is doing, I can go into a menu or something and it will scroll through the different icons. I don't know what the problem is, but it's getting on my last nerve.
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Aug 7, 2013
I have a Flying T600, a very well specified Chinese smartphone. It is brand new. My problem is that it often scrolls through various screens all by itself, as if someone else is in control of it. The only thing to do is to switch it off. Do you think the phone is faulty, or possibly hacked?
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Oct 18, 2012
On my droid x2, when i recieve a text message, it automaticlly scrolls it on the top of the screen without even opening the message. Is there any way to disable this?
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Sep 1, 2012
in Jelly Bean opening an email in the basic email app and then touching anywhere within the email makes the email quickly scroll down to hide the to/from bar. It's the only place in Android where a single touch causes a scrolling response, so when I open the email and begin to scroll with a swipe, it jumps down and then scrolls which is somewhat disorienting as it differs from how scrolling works in every other app including Gmail.
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Sep 7, 2010
I have a ListView, and within each list item I have some TextViews and a CheckBox. When I check a CheckBox and my onCheckedChangeListener fires, everything works as it should. However, random other checkboxes get checked once one is checked. Here is an example.
If I click on the first CheckBox:
8 is checked.
15 is checked.
21 is checked.
27 is checked.
33 is checked.
41 is checked.
Then if I scroll all the way up, none are checked until 6. The next being 13.
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Apr 25, 2010
I'm trying to figure out how it's been designed. How it holds its items? How do I get a hold of the scrolling container? How can I know it's exact scrolling position? How can I scroll it to an exact position?
I want to have all the current benefits the ListView provides plus detailed scrolling control... How about animating from x to x+100 scroll position?
Maybe I need to create my own ListView? Where do I begin?
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Nov 18, 2009
Firstly, I have found many examples of how to grab data from a db and place it into a list, however this seems to be all for ListActivites.
My list is part of the UI and therefore I can't use a ListActivity because it does not consume the whole screen (or can I?).
This is the UI:
CODE:........
So, from what ive read I need to grab the data from the db, then place it into some sort of array then use an array adapter to fill the list view. Is that correct? If so, is there some sample code because all I can find is code releated to ListActivites.
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May 15, 2010
I am writing a software that i have to drill down on content a lot. For example when the program starts a listview is displayed. When user clicks on an item, then a second listview must be displayed. For example:
Select Continent > Select Country > Select State > Select City > Select Address
What is the best way to do this (less memory, faster, easier to code etc)? To create multiple listviews with multiple adapters? Or 1 listview with multiple Adapters? Lists are loaded from an external XML File.
So far i am creating a new adapter and setting it to the listview. How do i create a second listview and after clicking on 1st listview displaying the second one, with animation. Any examples? Extend my class to ListActivity or Activity?
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Oct 11, 2010
I wish to work with checked list views wherein only one item can be selected at a time. Some queries related to this:
1) Is it advised to work with CheckedTextView as the ListView items, or a combination of CheckBox and TextView?
2) If using CheckedTextView, the text comes first and the checkbox appears on right edge. Is it possible to make the checkbox come on the left of the TextView?
3) How can I make one of the items as checked in onCreate()?
I am using array adapter and calling setAdapter() to populate list.
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Aug 16, 2009
I want to show many listviews in one activity. Something like
Textview Listview TextView Listview ..........
Every listview has different type of adapter. For this, I made the activity class like:-
CODE:........................
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Apr 20, 2009
Just looking at options for data updating affecting items in a ListView and have hit a few issues/queries.
There seems to only be notifyDataSetChanged() and notifyDataSetInvalidated(). While I could use notifyDataSetChanged() I am most likely in my case to have the scenario where additional data has been added and it seems inefficient to say the data has changed, which can only be resolved by calling getCount() and then getView() for all displayed items where knowing the data has been appended would just require adjusting the scrollbar. Is there some way to achieve something similar to this as the market seems happy populating dynamically in a manner that seems to reflect my desired behaviour (unless it just refreshes it all that fast).
Next question is the situation where the data behind just one item has changed. For instance I may wish to download icons in a background thread, but display available information with a placeholder icon. The best idea I've had so far is to store a map of indexes and views in my adapter which I can check against then call getView directly myself to have the view recycled with the new data. I'd just need additional logic to handle removing the map when the view gets destroyed or when it's recycled in getView. Either a bi-directional map (do we have one of those?) or two maps. Is the above likely to be my best approach or is there something built-in/better to get it done.
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Jul 22, 2010
In my app, I have different activities with listviews. The datas come from a server with a REST method, and it's only done once, when I start the application.
The pattern that I'd like to set is to precharge all the listviews with the JSONs that I already have in local, and in parallel, launch a thread that get the new JSONs files with my REST methods, and then update the listviews.
For now, when I start the app, I parse my JSONs files, and build all the lists of objects. I access them later in a static way, from my lists adapters.
So I would like to know the best way to launch this REST thread, and update the listview. Should I use AsyncTask ? A service ? and then, when I update my local JSONs, I have to re-parse them, updates the lists of object, and call in my adapters NotifyDataChanged ?
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Mar 22, 2010
Can I have two ListViews on a single ListActivity? I have built the xml file easy enough, but the code around ListActivity, setListAdapter(), getListView() and the like, all seem to be designed around one ListView per activity. How to get 2 ListViews in one screen?
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Nov 8, 2010
I'm not looking for exact code here, just a direction on what to look for and what I should be reading about so I can figure this out. I have a layout that I would like to remain static, with only the listview changing depending on what's selected from the list. I've reloaded data in the list, but I would like the fancy transition animations between choices, and would like the app to go to the previous menu when pressing back.
Someone suggested using a viewswitcher, which seems like it'd be great, but I am still unsure about how to fill a listview in a layout with a regular row layout, then on selection do an animated transition to a custom row. Also, it seems the viewswitcher is limited to two views, so it may be a limitation when I want to go a few menus deeper. Preferably, I'd like to put each menu in it's own class so that I can handle filling it in that class, if possible...
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Mar 25, 2009
I am trying to design a UI which utlizes two ListViews on the screen at the same time. Is this possible ?
So here is a quick example of how I was intending to do this.
1) Create an XML which positions 2 ListViews one onto of the other each ListView having there own ID
<ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="198px"
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Apr 18, 2010
I guess my previous question wasn't clear enough ( http://stackoverflow.com/questions/2549585/android-failed-to-setcontentview-when-switching-to-listactivity ), so I explain as follows.
In my app I have two listactivities which uses two different listviews:
CODE:.......
As required by android, listview must have an ID which is exactly "@android:id/list". If I set the listview in both listview1 and listview2 with the same ID, then they will end up using the same format of listview, which is not what I want. But if I set one of the IDs to be sth like "@+id/listview2", android gave me the error: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
My listview is sort of complicated, customed list with image icons and text, so in my code, I also extended the ListAdapter:
CODE:........
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Oct 2, 2010
I'm having a several issues with ListViews.
The first problem is the layout that I use for every row of the listview. When I click in a row I've programmed that it expands with some other views. All works fine, but when I try to click again for shrink it, it seems that it's no focusable and doesn't highlight and, of course, it doesn't shrink. If I change the deprecated singleLine in the XML to inputType="text" all works fine but the row never highlithts.
The second problem goes when I try the method that Romain Guy said about the RelativeLayouts and the alignwithParentIfMissing. No matter whatever I try, but it seems impossible to implement in a ListView.
Another problem is with ellipsize, but it looks is a Android SDK bug and only works fine if I set singleLine in the attributes of the TextView
Well, I hope someone can helps me. I put the code of the listview and the XML of the layout. If you need some more code or information, as if you find any improvement or error.
CODE:..............
About the response of adamp, I've done this:
CODE:.......................
And finally, I have this listener:
CODE:..........
Once I've done that, there is no change about the behaviour of the listview. But I noticed that only I can expand the row clicking in the textview, if I click inside the row but in a empty area nothing happens.
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Aug 26, 2009
This application I've been working on has databases with multiple megabytes of data to sift through. A lot of the activities are just ListViews descending through various levels of data within the databases until we reach "documents", which is just HTML to be pulled from the DB(s) and displayed on the phone. The issue I am having is that some of these activities need to have the ability to search through the databases by capturing keystrokes and re-running the query with a "like %blah%" in it. This works reasonably quickly except when the user is first loading the data and when the user first enters a keystroke. I am using a ResourceCursorAdapter and I am generating the cursor in a background thread, but in order to do a listAdapter.changeCursor(), I have to use a Handler to post it to the main UI thread. This particular call is then freezing the UI thread just long enough to bring up the dreaded ANR dialog. I'm curious how I can offload this to a background thread totally so the user interface remains responsive and we don't have ANR dialogs popping up.
Just for full disclosure, I was originally returning an ArrayList of custom model objects and using an ArrayAdapter, but (understandably) the customer pointed out it was bad memory-manangement and I wasn't happy with the performance anyways. I'd really like to avoid a solution where I'm generating huge lists of objects and then doing a listAdapter.notifyDataSetChanged/Invalidated()
Here is the code in question:
CODE:.....................
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