Android : ListViews With Multiple Item Layouts
Aug 5, 2010
I have a ListView on my ListActivity and I'd like the rows of the ListView to be 1 of 3 different layouts. The first item in my list is always going to use layout A, the second item in my list is always going to use layout B, and all subsequent items are going to use layout C.
Here is my getView function: Code...
R.id.label1 and R.id.label2 are TextViews on R.layout.layout_A. However, txtLabel1 and txtLabel2 are null after trying to set them. Why?
I stepped through this code in the debugger and it inflated the correct layout (R.layout.layout_A) and fell into the correct case below to set the R.id.label1 and R.id.label2 text. Also, if there is a better way to do this, please let me know.
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Aug 18, 2010
I have a ListView with different layouts for different items. Some items are separators. Some items are different because they hold different kinds of data, etc.
I want to implement ViewHolders to speed up the getView process, but I'm not quite sure how to go about it. Different layouts have different pieces of data (which makes naming difficult) and different numbers of Views I want to use.
How should I go about doing this?
The best idea I can come up with is to create a generic ViewHolder with X items where X is the number of Views in an item layout with the highest number of them. For the other views with a small number of Views, I'll just use a subsection of those variables in the ViewHolder. So say I have 2 layouts I use for 2 different items. One has 3 TextViews and the other has 1. I would create a ViewHolder with 3 TextView variables and only use 1 of them for my other item. My problem is that this can get really ugly looking and feels really hacky; especially when an item layout may have many Views of many different types.
Here is a very basic getView:
CODE:..........
Suppose I had different types of row layouts, I could have a ViewHolder for each type of row. But what type would I declare "holder" to be at the top? Or would I declare a holder for each type and then use the one for the type of row I'm on.
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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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Sep 6, 2010
I'm creating a game where there's a screen that, for the most part, is shared by four different activites - but a key portion of the screen will be completely different, depending upon which activity is active. Basically, on the left will be an image of the player and along the bottom there will be a row of buttons (let's say for Armour, Weapons, Magic, Skills). This leaves the top-right portion, which will need to dynamically change to represent the button pressed. (So, one moment the top-right portion is the armour selection activity, and the next it's the weapon selection activity, and so on.)
Is this possible? Can I have a layout within a layout and dynamically point the nested layout at a (nested) layout.xml of my choosing? Or, am I looking at just duplicating most of the layout four times (for the four different activities?) Or, am I going to be looking at linking the four activities to a (the top-right) view component, and then having to dynamically construct all of *that* view's child views based on the currently active activity? Well, that's about as much sense as I can make this question make.
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Mar 31, 2010
I want to know how to change dynamically a ListView's item layout. To be exact, i want to know the method that the ListView's bindView method is called at runtime. if the bindView method is artificially called by a other method. then i will change a ListView's item layout.
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Mar 22, 2010
I have a ListView that is populated using an XML file. However, I want each item, when clicked, to start a new Activity related to that item. I understand how to use OnItemClick to start a Toast that shows the selected item's text. However, since the ListView is populated from an XML there is not a specific Id for each item in the list. So, how would I associate an Activity with each item in the ListView when the items do not have Ids?
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Jul 1, 2010
I'm planning to develop and app that presents the users with several different screens (of different information).
Was wondering what would be the best way to implement this?
Is it better to have separate XML layouts and an activity to display and allow the user to interact with each screen of data?
OR would handling all of these in the same activity be more efficient (and dynamically load / unload each layout)?
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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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Apr 5, 2010
I want to have multiple listviews in single activity. But only one listview should be displayed at one time. The listviews will be loaded dynamically. So, how can I fill all the four listviews at the same time and display only one?
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Oct 29, 2010
I have been trying to get a specific layout for more than two days now and really struck with it, what am trying to achieve is: To have a layout like the following
LISTVIEW A
VIEW
LISTVIEW B
VIEW
LISTVIEW C
(VIEWS are basically for headers) Can any one help to sort out this task?
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Mar 23, 2009
I want to have multiple listviews in my activity. Every listview will have a different adapter and every item in the listview must be clickable (other actions for every listview).
So my problem now is that I can't create multiple clickable listviews. I have one listview like this <ListView android:id="@android:id/ list".. and the other listview looks like this <ListView android:id="@+id/ flightList"
The first listview looks like this in my activity hotelList = (ListView)findViewById(android.R.id.list);
the second: listView = (ListView) findViewById(R.id.flightList);
I can click on the first list and it does what it has to do, but i cant do anything with the second list.. probably because it hasn't the android:id/list declaration. does someone knows how I can solve this problem or other suggestions how I can get multiple lists in 1 activity.
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Apr 4, 2010
I have a RelativeLayout with different elements. I was planning to have two ListViews on it, but I have noticed there are some problems with scrolling. Since each ListView only shows a maximum of 5 rows should I try to make some kind of custom adapter to merge those ListViews? Or is it better to replace the ListView with a LinearLayout/RelativeLayout and add the rows as I get them manually? (like the first answer in here: http://stackoverflow.com/questions/1778485/android-listview-display-all-available-items-without-scroll-with-static-header ).
Which should be the proper way on doing this? or is there another way? Also, each row will have an OnClickListener.
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Mar 16, 2009
So the situation is this, I have a ListView that is embedded in two LinearLayout ViewGroups to form a screen. BaseAdapter.get View() (the implementation of the ListAdapter) is typically called n times (where n is numElements) to render the screen. The problem I have is this set of calls is being repeated for every ViewGroup that the list is contained in...So for a Layout like this:
-LinearLayout --Linearlayout ---ListView
The adapters get View() is being called n*3 times (3 = 1 for the parent LinerarLayout, one for the child LinearLayout and one for the List itself).
This is obviously a problem when the items in the List are expensive to build (even with recycling).
So I'm looking for some guidance on this, as the documentation doesn't seem to note this behavior from what I can see.
A small, basic example of the source is located on my post here http://www.anddev.org/listview_getting_rendered_multiple_times-t5290.... with more details Oswell as a ready made eclipse project(also attached below) if anyone is keen to try it out.
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Apr 5, 2010
I want to have multiple listviews in single activity. But only one listview should be displayed at one time. The listviews will be loaded dynamically. So, how can I fill all the four listviews at the same time and display only one.
If anyone knows the solution then please share it over here. I hope to get a quick response.
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Dec 3, 2009
I am getting my feet wet developing software for the Android. My test app will have multiple screens (each having their own layout file). The main screen will direct the user to view the other screens based on user input. I kinda see this as layers of cake. Bottom layer being main; then you add and remove layers as the user makes UI inputs. The crazy trouble is how to view a second layer. I have created a second class which has its own onCreate method, which has its on setContentView(R.layout.secondlayer).
This class extends Activity much like my primary class does. I have a click event on a button within the main layout. This button will instantiate the new second layer class which I have done. And that is where my story endsI don't know what to do from this point. This is surely a newbie question If someone has an example that would be extremely helpful teach me to fish and I will be on my way.
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Dec 16, 2009
I have created layout-large and testing against android 2.0.1 WVGA. however, its picking layout-normal. Can anybody suggest me what I am doing wrong. Even though, I have 3 layouts ( layout-normal, layout-large, layout- small), Its always picking layout-normal. why its so.
I added properties to manifest file
CODE:.............
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Aug 22, 2009
I'm beginning in android development, and I've stumbled upon a problem. My application has different layouts stored in xml files, and I use motion events such as onFling or onSingleTapup. These motion events seem to apply whatever layout i'm in. My problem is simply identifying which layout i'm currently using so I can define the appropriate action. I guess what i'm trying to do is a bit like this:
@Override public boolean onSingleTapUp(MotionEvent e) { if(using main layout) { //do this } else if (using settings layout) { // do that } return false;
}
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Oct 18, 2010
I have developed an application which en-composes list views and posted that .apk file in my htc device, the design and alignment everything works fine,but the problem When i am testing in various devices such as Morotolo Droid,Nexus Devices the alignment of Listviews goes wrong, so i planned to use the Layout folder as layout-hdpi,layout-ldpi, and layout-mdpi, for that i changed my manifest file as
<supports-screens android:largeScreens="true"
android:normalScreens="true" android:smallScreens="true"
android:anyDensity="true" />
Is it right putting android:anyDensity="true",also i used dp instead of dip. I went through this url, but still am not able to get a clear idea in this
http://developer.android.com/guide/practices/screens_support.html. so friends pls tell me(help me) to get clear idea in this and tell what mistakes i have doing. This is my main page xml code frnds.
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/background_retinav2">
<LinearLayout android:layout_gravity="center" android:foregroundGravity="bottom" android:background="@color/white" android:id="@+id/rl_1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal">
<ImageView android:paddingTop="3dp" android:id="@+id/starthideimage" android:layout_width="30dp" android:layout_height="35dp" android:src="@drawable/newback" />
<HorizontalScrollView android:paddingTop="8dp" android:id="@+id/gv"
android:layout_width="wrap_content" android:layout_marginTop="0dp"
android:layout_height="wrap_content" android:background="#ffffff"
android:scrollbars="none" android:layout_weight="1" android:foregroundGravity="bottom">
<LinearLayout android:id="@+id/san_tag" android:layout_width="wrap_content" android:layout_height="wrap_content">
</LinearLayout>
</HorizontalScrollView>
<ImageView android:paddingTop="3dp" android:id="@+id/Endhideimage" android:layout_width="30dp" android:layout_height="35dp" android:src="@drawable/newforward" />
</LinearLayout>
android:id="@android:id/tabs"
android:gravity="bottom"
android:layout_gravity="bottom"
android:listSelector="@color/gray"
android:layout_width="fill_parent"
android:layout_height="wrap_content" /> </TabHost>
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Oct 19, 2010
I'm trying to create a title bar that is the same throughout my application and have been creating layouts like this for each of my activities:
main.xml:
<?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">
<include layout="@layout/title_bar_layout" android:id="@+id/title_bar_layout" />
<include layout="@layout/main_body" android:id="@+id/main_body" />
</LinearLayout>
main_body.xml:
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main_table" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:stretchColumns="1"
android:orientation="vertical">
</TableLayout> Code...
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Mar 25, 2009
I am new to android and trying to create a customized list. Every item in the list has TextView and one Ratingbar. I now want add a couple of command buttons at the end of the list (like BACK, HOME, , NEXT). When I add these extra views to the layout xml file then they get added along with every item in the list. I think there should be another layout defined for the buttons to be displayed separate from the list. Anyone has an idea on how to do this?
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Jun 26, 2010
I'm trying to create an app that offers the user 3 different kinds of layouts. The only common portion for all 3 would be the TextView (located at the top) that would display information specific to the currently displayed layout and 3 buttons to select the required layouts.
Is there some way we can create this UI in XML to keep only one constant part(the upper TextView) and dynamically display any one of the 3 layouts below it?
Would it be better to create separate XML's for each of the layouts (each including the upper TextView in them)?
OR would doing this via code be better?
Fast switching between the 3 layouts is important. TIA
[EDIT 1]
Actually they are 3 different layouts, with several "child" layouts and views within each of them. Could a ViewFlipper be used for switching between these? I was thinking that a ViewFlipper was only for switching between View elements?
I do have them in individual XML's right now but am looking for some way to load and unload them fast. Not sure how to do the hiding thing, will try reading up on that. [/EDIT 1]
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Jun 2, 2009
I am working on developing several individual android applications. We had created common UI Layout View XMLs, classes and resources. I would like to share these common layout xml, classes and resources across all of my android applications. I dont want to duplicate them in my applications. Is there any easy way to do this?
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Mar 28, 2013
Can you have Multiple Home screen Layouts? Like Like swapping themes but layouts. I designed a bunch of custom wallpapers with corresponding Custom widgets. I'd love a way to just swap between different ones with out having to re-set up all the widgets.
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Aug 20, 2010
I have a layout that has just a ScrollView visible. It has a relative layout as its child. This layout has several other layouts (mainly text views) as its children. When the text is not big enough, the scroll view does not expand itself to fit the whole screen. Instead, it shows a gap at the bottom where the background shows. I tried setting fillViewPort=true on the ScrollView, but that just made the first child layout (RL1) to fill the screen.
CODE:....................
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Sep 1, 2009
How to select multiple item in ListView in android.?
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Mar 8, 2010
My list view is a multiple selection list view. i have to show the selected list view items in one color(say green) and the other items in some other color(red). How to achieve this?
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Sep 1, 2010
I am developing one Map based application and in this application i want to draw Multiple Overlay Item(With Marker) on map.so anyone can told me the efficient way of doing it.
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Jan 21, 2009
I am having trouble setting one menu item/button to run different actions based on other actions currently running(ie having the button toggle actions). what I am trying to do is have a menu item to toggle wifi on and off but when I try to run if/else statements on the menuitem click it force closes the app.
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Sep 6, 2010
I am new in Android development, I got a simple question to ask, I know the way how to implement item insert to DB table when there is only one id column and one "name" column in the table, which is code...
But how about there are multiple columns (more than 2 columns) in the table, how to implement the insert function?? For example I have a TABLE (myTable) has the following columns:
"CREATE TABLE myTable (id INTEGER PRIMARY KEY, date TEXT, time TEXT, cost DOUBLE)"
Now, I want to use SQLiteStatement to insert a item to this table, how to do that?
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Jan 12, 2010
I have the following code to intantiate a SimpleCursorAdapter to use with a ListView. As you can see I have passed the R.layout.log_item to display the list items, and one value/control to bind to (TripDate).
SimpleCursorAdapter sca = new SimpleCursorAdapter(this, R.layout.log_item,c,new String[] {DBAdapter.KEY_LOG_TRIPDATE},new int[]{R.id.txtTripDate});
This works. I currently only have one widget in the layout xml, a TextView to hold the TripDate.
How do I pass multiple binding parameters for the additional widgets in the layout? So I can also display other info.
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