Android :: Custom BaseAdapter - Dynamic Updates - Crash In ListView Layout

Feb 16, 2010

I'm trying to get my first Android app stable enough for the marketplace, and I've hit a brick wall with one exception that I don't understand. Probably I'm doing something stupid, but I can't tell what, and after several hours googling and experimenting, I thought I'd see if I can get some help. My Activity extends ListActivity, and the parts I think are most important are extracted below:

GroupedListAdapter is a simple class that extends BasedAdapter to provide headings for sections of the list (not unlike the Fancy ListView tutorials that are floating around).

I create this in onCreate, and it works fine. Inside onListItemClick, I do some actions which will create a different set of list contents. I "clear" the adapter, which empties the contents, and call reload, which repopulates it. Then I call notifyDataSetChanged.

Most often, this seems to work, but also fairly often, I get the exception following the code snippets below - this seems to indicate the ListView is not in sync with my changes. Lately this crash happens 100% of the time under the simulator.

CODE:.........................

Android :: Custom BaseAdapter - dynamic updates - crash in ListView layout


Android :: Crash To A ListView With Different Row Layout!?

Aug 31, 2009

I built an app to show a ListView with different layout of each row within it. I extend BaseAdapter to construct my own adapter class and override its getView() method. In getView() method, I use

view = mInflater.inflate(mResource, parent, false); to obtain which layout xml file that be needed to generate different layout for each row.

After coding and running, the problem occurs. While I'm scrolling the list, this app crashes and pop-up an warning dialog that says "The application has stopped expectedly. Please try again."

If I use the same layout xml file to enable each row has the same layout, everything is all right. Does somebody has any ideas about that?

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Android :: Autoscroll To Bottom On Custom Dynamic Listview

Sep 14, 2010

I followed example as http://www.androidpeople.com/android-custom-dynamic-listview/

However I bump into problem applying autoscroll to bottom as listview.setTranscriptMode(ListView.TRANSCRIPT_MODE_DISABLED);

Where should I apply it?

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Android :: Listview Custom Row Layout - Tried Many Combinations

Jun 13, 2010

I am having trouble getting my layout to give me result I need, I already tried many options and it seems that I'm doing something wrong or completely missing something.

I have a listview with a custom row layout I can't seem to working although it shouldn't be complex. I need of the list row to insist of:

Icon -- title text (bigger and bold) with a short multi line text under the title -- ImageButton

My problem in most of my tests is the icon to the right usually doesn't appear, I guess my center group grows and takes all the space of the button. My last failed attempt was with a Relative Layout, didn't have too much luck with a Linear Layout either.

Here is the row XML:

CODE:.........................

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Android :: Custom Typface In Listview Row Layout

Aug 6, 2010

I am running a sqlite query and binding the returned data to a ListAdapter.

I have used the following example

ListActivity | Android Developers

However, having defined a seperate layout for the rows I cannot change the typeface for textview text1 to a custom one from assets

Here is the row layout

CODE:................

Here is the code from the andriod tutorial

CODE:............

We'll define a custom screen layout here (the one shown above), but typically, you could just use the standard ListActivity layout. setContentView(R.layout.custom_list_activity_view) ;

Query for all people contacts using the Contacts.People convenience class. Put a managed wrapper around the retrieved cursor so we don't have to worry about requerying or closing it as the activity changes state.

CODE:................

Now create a new list adapter bound to the cursor. SimpleListAdapter is designed for binding to a Cursor.
CODE:................

Specify the row template to use (here, two columns bound to the two retrieved cursor rows). mCursor, // Pass in the cursor to bind tonew String[]{People.NAME, People.COMPANY}, // Array of cursor columns to bind to. new int[] {android.R.id.text1, android.R.id.text2}); // Parallel array of which template objects to bind to those columns.

CODE:................

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Android :: How Does BaseAdapter Communicate With Its ListView?

Sep 6, 2009

How does BaseAdapter communicate with its ListView? I was wondering how the BaseAdapter.notifyDataSetChanged() method notifies the attached View that the underlying data has been changed and it should refresh itself? When creating a BaseAdapter you attach it to the View with.So the ListView then knows it's adapter to get list elements. But you never tell the BaseAdapter what ListView it is attached to. So when you call BaseAdapter.notifyDataSetChanged() how does it reach the View to tell it to refresh itself?

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Android :: BaseAdapter Don't Hide Layout With SetVisibility - View.GONE

Jul 29, 2010

I have a little problem. I have class

CODE:..............

When I do that, method convertView.setBackgroundColor(Color.RED) work great, what I need Image is there:
dl.dropbox.com/u/866867/stack/device2.png

But when I want to remove that item, I can't do it. I add there convertView.setVisibility(View.GONE); , but have empty item, beside hide it. I read that parameter View.INVISIBLE won't hide layout, but View.GONE have, but in my code, doesn't.

And that image: http://dl.dropbox.com/u/866867/stack/device.png

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Android :: OnClick() Event On An Item Of ListView Custom Row Layout

Nov 15, 2010

I have a ListView whose rows are formatted by me. Each row has a mix of ImageView and TextView. I have also implemented my own adapter and am able to draw each row through it.

Now, I would want something like this-

User clicks on an ImageView (not anywhere else on the row, but only this ImageView should respond to clicks)
I get to know the position of the row whose ImageView was clicked.

I have tried many things for this and have wanted my code to be as efficient as possible (in terms of overkill).
Currently i can capture the click event on that particular ImageView only, but I can't know which row was clicked.

I have provided an attribute in the Row XML like this-

CODE:..................

And in my code, I have a method like this:

CODE:..............

I can get the parent row (perhaps) but am not sure how to go further from here.

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Android :: ListView With RadioButton In SingleChoice Mode And A Custom Row Layout

Nov 22, 2010

I have a ListView, which is in singleChoice mode. All I want is to display a RadioButton to the side, that when clicked highlights to say it is selected, and when a different one is clicked that one goes back to unselected and the new one becomes selected. Why is this so hard? This should not be this complicated. I've spent DAYS looking for an appropriate answer to this and I have found nothing, so I'm asking hopefully in a clear and concise manner.

My layout for the listview (R.layout.view_orders):

CODE:.............

My custom row (R.layout.orders_row):

CODE:.................

My onCreate() method:

CODE:.................

Now everything underlying works as expected, you click on a radiobutton and through it's tag I can appropriately select that item from the list and manipulate it how I want. However, when the first radio button is clicked, the last one will be selected. Click that same radio button again, and it is now selected as well. Click it once more and nothing happens, both the last and the first are selected. Now I click any other one on the list, it gets selected like expected. Click anyone of the selected radio buttons and nothing happens, the radio button remains selected.

I have tried using the following in onCreate():

CODE:.................

And that just shows no radio buttons at all. AWESOME.

Now maybe (read: most likely), I'm just dense and can't figure this out, but I've seen this question asked a lot with no real answer. Lots of references to other tutorials or to the Commonsware guy's book. However, the comments are old now and his repository has changed so much, that those are no longer correct answers.

So, does anyone have any idea how to get the expected functionality out of this? Or failing that, just pass me along the GMail app's source code.

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Android :: Cannot Display Image Correctly Using Custom Item Layout In ListView

Apr 22, 2010

I am using a ListView to display my custom item layout, which may contain some TextViews and an ImageView.

This is the item layout I made (post_item.xml):

CODE:........................

I don't put the ImageView initially in the xml layout, but I will insert it when I need to the FrameLayout programmatically (I also put another views in it when needed). So, there will be some items which has ImageView in it and which don't.

I get the image to fill the ImageView from the Internet (through URL), decode it as Bitmap, and keep it as a Bitmap variable in a class represents the custom item layout (class PostItem).

When the activity shows for the first time it looks fine, but as I scrolled through the items then a problem showed up, the items which shouldn't show any image show the image from the other item which should, although they don't have any ImageView (because I didn't insert it).

I am using SDK 1.6 and the emulator. Haven't tried it in real device because I don't have it.

Here is my code for the Adapter:

CODE:..............

And this is the code to prepare the items:

CODE:.........................

Is this the bug in the emulator or there is some mistake in my code (probably memory problem for the Bitmap)?

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Android :: Finish Activity From Custom BaseAdapter

Nov 22, 2010

In my android application I have custom listview with an image and textview. In extended BaseAdapter under getView method click events of textview and image are associated with onClick method using setOnClickListener as shown in code below

CODE:.............

And

CODE:...................

When clicking on image it acutally deletes that entry from List which works fine, but on clicking textview i would like to return the text of clicked textview to main activity but I am unable to achieve this, although I can do this from setOnItemClickListener of this custom listview acitivity.

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Android :: Custom ListAdapter Extending BaseAdapter Crashes On Application Launch

Mar 23, 2010

Data being pulled from a local DB, then mapped using a cursor. Custom Adapter displays data similar to a ListView. As items are added/deleted from the DB, the adapter is supposed to refresh. The solution attempted below crashes the application at launch.

CODE:................

Errors:

CODE:.........................

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Android :: Layout With Dynamic Position

Sep 10, 2010

I have a layout which might be a bit unusual.

The structure is the following:

CODE:..............

My customRelativeLayout at the bottom of the XML has a XML layout too:

CODE:.............

My CustomRelativeLayout:

CODE:.....................

What I want to do: I want to be able to change the position of my CustomRelativeLayout. It should be follow my touch. Its smaller than the SurfaceView and should "slide" above following my touch...

There are two problems:

The onTouchListener bind to mLinearLayout (in CustomRelativeLayout) is only triggered once and only for ACTION_DOWN. I see the log output only once The note never changes the position, it is never redrawn with the changed matrix... I see the output stated in onDraw never after the touch happened.

First might be because the SurfaceView also handles touch events. But I thought if the CustomRelativeLayout handles it first, it should work.

Thanks to Xil3 I was able to remove the wall I was run into...

Here is my solution:

My note xml:

CODE:.................

And here is my constructor:

CODE:..................

I also found a bug/feature/issue, which is absolutely new for me: When I remove the background in my note root element (which is currently transparent) the note is only visible within the 200dp width/height I have set in the inner LinearLayout. So its not fill_parent, its wrap_content even as I set it to fill_parent. So layout_width and layout_height only use the given fill_parent when a background is set...

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Android :: Dynamic Layout Change During Runtime

May 25, 2010

For an application I need to place some objects at the exact position that I want to have them and therefore I need to use AbsoluteLayout this time.

I want to add buttons dynamically exactly like in the following XML - but during runtime.

CODE:................

How can I archive this? I tried it with the following code to add a button, but I haven't found a function so far to set layout_x and layout_y. How can I do this?

CODE:....................

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Android :: Automatic/dynamic Margin In Layout

Aug 10, 2010

I was wondering if it's possible to set an automatic/dynamic margin (padding?) between elements in an Android layout without having to do it programmatically?

For example let's say there is a horizontal LinearLayout which is set to android:layout_width="fill_parent" and that contains five elements. Is there a setting that evenly shares the remaining empty space of the LinearLayout to the margins of the child elements?

See image at http://img63.imageshack.us/img63/8/margin.png

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Android :: Dynamic Lists Of Data In A Layout?

Nov 17, 2010

I want to display contact information in a custom layout. My app lets the user select a contact, then I retrieve key pieces of info on that contact (phone #'s, email addy's, etc). I want to display them to the user so they look grouped logically. Sort of like a series of tables, so phone numbers, then email addys, then organization, etc.

I have a table format that I've been using in a different part of the app where I know the exact number of rows I'm adding and I have defined styles for the rows already. I want to reuse those styles for this data, but android sdk won't allow for you to set the style attribute programmatically.

I could create the tables in code and set all the attributes the same as in my defined styles, but it seems like a lot of extra coding.

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Android :: ListView And Dynamic Row Sizes

Mar 18, 2010

I'd like to use different row descriptors (from the XML layout resource) in one ListView. Can I and how? Also, I'd like to be able to programmatically change the size of the rows, based on the data in each row, in a ListView. Can I and how?

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Android :: Get Id In Different Layout - App Crash / Fix Error?

Nov 18, 2010

I have id "@+id/call" in single_item.xml when i use findVewById it (the layout setcontextview(R.layout.main)) .the app crash .how to fix the error

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Android :: Dynamic Loading Of Complete Layout File

Jul 1, 2010

I'm dealing with a problem you guys might not have faced earlier. I'm having a use-case in my Android application where the actual screen that I want to show to user is not stored in any layout file of my application. The layout of the of the screen is designed by server in this case, based on selection made by user on first screen.

Let me elaborate here,
1st Screen : List of check box with different biller names. (Imagine I've selected 2 billers from this screen)
2nd Screen : (The screen that server has decided how it should look like)
* Header,
* 1st Biller name (Label)
* Amount for 1st Biller TextBox
* Image (a Separator image)
* 2st Biller name (Label)
* Amount for 2st Biller TextBox.
* Here there can be a checbox/radio/another TextBox anything.
* Image (a Separator image)
* Button (to submit above form back to server)

I hope makes some sense in what I'm planning to design. The current issues I'm dealing with are as below.
1). How to draw this dynamic widgets?
2). How to fetch user Inputs from this dynamically created widgets?

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Android :: Display Dynamic Table Layout In Droid?

Jul 7, 2010

I try to add a table layout from Java code. When there are two fields in a tablerow it displays the first field only. How to display the entire row with all fields?
code... How to do this?

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Android :: Dynamic ListView Extends Activity

Sep 26, 2010

Is there anyway I can create a dynamically filled ListView when the class does not extend ListActivity?

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Android :: Layout Editor Causes Eclipse To Crash

Mar 3, 2010

Looking at the search results on the internet and on this group,I find several mentions of the problem. Eclipse crashes while opening layout in the editor.

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Android :: Why Does This XML-Layout Based Application Crash

Sep 14, 2010

I am very new to Android Development. I am trying a sample application and it is generating a button dynamically using Java and it is working fine.

This works fine in my emulator. However when i try do with an XML based layout, my app crashes in the emulator.
Main.XML contents
<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="com.testing"
android:id="@+id/button"
android:text=""
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
Code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btn=(Button)findViewById(R.id.button);
btn.setOnClickListener(this);
updateTime();}

Does anyone know why this simple application is crashing because of the XML layout?

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Android :: ListView OnListItemClick Setcontentview Crash?

Nov 3, 2010

I have been trying to set a new xml layout, when a particular item on this list is clicked.
Am I missing something, because the emulator crashes when clicked?! setContentViewById(R.id.newxml file)

public class intentProject extends ListActivity
{

ListView list;
ArrayAdapter<String> aa;
List<String> data = new ArrayList<String>();

public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);........................

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Android :: Make Dynamic Layout Which Contains Mixed Elements - Checkboxes And Buttons?

Mar 2, 2010

I want to make a dynamic layout which contains mixed elements

[text] [checkbox] [button]
[text] [checkbox] [button]
[text] [checkbox] [button]

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Android : Pass Droid Dynamic Layout With Variable Textviews / Events?

Nov 8, 2010

I have a layout with dynamic content. It has a variable number of textviews. On each textview I have to attach an event, a click event. I have to pass to that event some kind of information to know what textview has been clicked exactly. How can I pass this kind of information or how is the android way to do it?

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Android :: Dynamic Display Of ListView Elements Partially Working

Jul 26, 2010

I am making a time sheet program where a user inputs his in- and out-punches. I have a ListView that I am populating from an array of calendar objects. I would like each row to show the day and date then on a new line the time, but I only want to display the day and date if it is different from the previous element.Currently, I am setting visibility in the Base Adapter based on comparisons using position vs position-1 (which are used as indices to the array). This only works if the whole list fits on the screen. If it extends beyond the screen and the user scrolls around the results are unpredictable.To further confuse things, I am setting the color of the times, based on the position, to alternate between green and red (in/out) and it works as expected, scrolling or not.How does Android handle the ListView position when scrolling or what could I do differently to show/hide the day and date? Code...

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Dynamic ListView - Loading Contents

May 29, 2014

I am developing an application. In that application i have 2 list view (a and b ), i need to load the content of the list view (b) according with the selected value of first list view(a).How its possible.

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Android :: Dynamic Array Instead Of Static / When Creating ListView Icons And Text

Oct 29, 2010

I am using this following code which creates a ListView with text and an icon but the problem that I have which the following I want the array to be dynamic instead of static so my list gets created dynamically not statistically. My ultimate goal is to retrieve specific strings from my Db and to display it then on the Listview where every string would be in each row.

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Android :: Refresh Droid ListView After Adding / Deleting Dynamic Data?

Feb 12, 2010

I want to refresh an Android ListView after adding/deleting dynamic data.

Can any one tell me how to achieve this?

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