Android :: Possible To Populate List View From Cursor Row Id?

Sep 23, 2010

Is it possible to populate a listview based on a row Id from a custom cursor adapter. I keep getting an error "illegalArguementException column: _id does not exist". but the database has it and is already being used correctly. I don't know what to do, because I would need to populate different listviews from the same database and i don't want to have to create multiple database which will still have the same column names code...

Android :: Possible to populate list view from cursor row id?


Android :: Populate View Flipper Child View With List View?

Aug 2, 2010

I am trying to set up a ViewFlipper that changes a SlidingDrawers content each time a button is pressed. So far every view I set up worked fine, but now I am trying to create a ListView (including single_choice_mode) within a child view of the ViewFlipper, but my attempt only let to a NullPointerException. As I only discovered ViewFlipper today, I am not yet familiar with it and may not have understood it completely. if someone could give me a hand and help me find out what I have done wrong, that would be great. Here is what I have done:

The code for the onClick event of the ImageButtons:
public void onClick(View v){
if (v == btnExposure){
mFlipper.setDisplayedChild(0); }
else if (v == btnProperties){
mFlipper.setDisplayedChild(1);}
else if (v == btnSpecialEffects){
mFlipper.setDisplayedChild(2);.............

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Android :: When Should Close Cursor That I Supply To List View?

Jul 28, 2010

I supply a cursor to a ListActivity like this: My question is how/when should I close my cursor when I am done? Cursor cursor = get ContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
mCursorAdapter = new CursorAdapter(this, cursor);
setListAdapter(mCursorAdapter);

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Android :: List View Separators Using A Cursor Adapter

Oct 5, 2010

I have a ListView which is populated using a CursorAdapter. I'd also like to have some separators in my ListView. I have accomplished this with an ArrayAdapter, but I'm not sure how to accomplish this with a CursorAdapter. Are there any strategies for doing so? Or am I out of luck?

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Android :: Simple Cursor Adapter - List View

Jun 9, 2010

I have table with 3 columns which is binded to an XML document with three text views.

CODE:........

Depending on the value store in the third column, I have to decide whether i should display this row or not

How should, I go about with this.

This is what I have so far :

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

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Android :: Merge Name And Tell Columns Of Cursor To Show Both In One List View?

Nov 5, 2009

I am making an app where I need to filter the contacts as user types.. I m using autoTextView and I am able to successfully query the contacts db for either tel number or name.. However while displaying I can either display name or tel number only as simple cursor only lets me match one list view with one column.. How do I merge the name and tel number column of the cursor so that both of them can be shown in one list view.

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Android :: Contents Of List View - Using A Cursor Adapter - Are Not Updated Refreshed

Aug 26, 2010

I have a list which shows data from a database using a cursor adapter. Using Menu option I am updating my database (inserting more rows deleting existing rows). When Menu operation completes, I want contents of list should show updated contents.

I have tried using cursor.requery(); (or explicitly querying cursor again) and using adapter.notifydatasetchanged(), but with this list of contents are not updated.

How can I refresh the contents of the list.

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Android :: Simple Cursor Adapter - List View - Binded To XML Document With Three Text Views

Mar 18, 2009

I have table with 3 columns which is binded to an XML document with three text views.

CODE:........

Depending on the value store in the third column, I want to change the text color in R.id.c. How should, I go about with this.

This is what I have so far :

COD:...............

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Android :: Populate A Spinner From Cursor Accessing An SQLite Database?

Aug 25, 2009

How do you populate a spinner from a cursor accessing an SQLite database?

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Android :: How To Expand ListView As List Item Populate?

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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Android :: Base Adapter - Trying To Populate List On Activity Screen

May 29, 2010

I am extending BaseAdapter and trying to populate the List Screen on my Activity Screen. NotifyDataSetChanged is not working as expected. Please find the below snippet of code.

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); initialize();
context = this; config = Config.getInstance();
searchText = new EditText(this); handler = new Handler() {
@Override public void handleMessage(Message msg) {
msgQueueAdapter.notifyDataSetChanged();
context.msgQueueAdapter.notifyDataSetChanged();
msgQueueAdapter.notifyDataSetInvalidated(); } };

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Android :: Multi Column Custom List View / With Editable Edit Text At End Of List View

Nov 3, 2010

I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).

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Android :: Populate Downloaded Image And Show In Thumbnail View?

Aug 20, 2010

I am developing an app in android, which basically visits a given url and downloads an image. Now i want to populate this downloaded image and show it in thumbnail view. I have tried out displaying the same from SD Card, but when i am doing the same for downloaded files, it doesn't seems to work.

public View getView(int position,View convertView,ViewGroup parent)
{
System.gc();
ImageView i = new ImageView(mContext.getApplicationContext());
if (convertView == null)
{
//imagecursor.moveToPosition(position);
//int id = imagecursor.getInt(image_column_index);
//i.setImageURI(Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, ""+ id));
i.setImageBitmap(bitmap);
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
i.setLayoutParams(new GridView.LayoutParams(100, 100));
}
else
{
i = (ImageView) convertView;
}
return i;
}

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Android :: How To Show List View'B After Clicking List View A?

Apr 4, 2010

I'd like to show another List View 'B' after clicking a item of List View 'A'. I use onListItemClick event in Android 1.6 project.

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Android : How To Have A Horizontal List View With An Vertical List View?

Jun 8, 2010

Is it possible to have a horizontal list view with an vertical list view? I would like to horizontal list scroll within a vertical list scroll.

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Android : Can I Create A List Array With Cursor Data In Droid?

Aug 30, 2009

How can I create a list Array (the list display First Alphabet when scroll) with the cursor data?

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Android :: Causes A Redundant Cursor Adapter To View Copy

Oct 28, 2009

CursorAdapter is great, i'm a big fan. I notice that both newView() and bindView() are passed Cursors, indicating that extracting stuff from the Cursor and sticking it in the view should happen inside those overrides.

however in the source for CursorAdapter.getView() i see that bindView() gets called whether the view is recycled or not. in the new view case, this causes a redundant Cursor to View copy.

IMHO, CursorAdapter should call newView() if the view couldn't be recycled, or bindView() if it could.

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Android :: Custom List Cursor Adaptor Crashes At BindView On Emulator - Not On Phone

Aug 23, 2010

I will try to be specific if I can - please be patient, first time asker and relatively new to programming on this platform. Apologies if this has been asked/answered before - please link it to me. I have searched up and down but find other unrelated (to me at least) problems.

The real puzzler for me is that my app is crashing on my emulator but when installed on my phone (via upload of apk to phone and then using an AppInstaller app from market) it works.

The crash comes from a NullPointerException at the numbered line in the following code snippet (my code) of a custom list cursor adapter.

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

The following error dump is created.

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

Curiously I have been happily programming and debugging away all day and out of the blue a long working and bug free portion of my app now throws up this error.

I suspect it might be a problem with the databases, but really not sure - nothing seems out of place there. Up until today I had a database with only one table - today I added a new table which also has a "_id" field as the name autoincrement key field, which I read in the docs was required for android list adapters (if memory serves). Having some experience in coding and some minor experience with databases, that seems like a bad idea to me but I am uncertain of if that is the problem and/or how else to do it.

The crash I am listing here does not display or make reference to the data in the other, new table. The cursor does not contain any query data from it. In fact if I rename the key field "_id" of the new table to something else (ie "_blah"), the crash remains.

Like I said, if I upload the apk to my phone, it works.

I have tried the following on the emulator:
- restarting adb (and eclipse) - no result
- uninstall from emulator - no result
- destory AVD profile and recreate - no result

I am developing this under the Android 2.1 SDK, and have been for the last few weeks. I have only ever had that SDK installed, I am yet to update to 2.2.

Not sure what else I can say here - hoping somebody here has experience enough to shed some light on it.

Without a fix to this, I can anticipate a very slow development process here on out (assuming I have to upload to my phone to test new code changes...).

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Android :: Graphically Represent Multiple List Selections / Dynamically Change List Item View

Apr 23, 2010

I'm trying to create a multiple selection list where the selection is represented graphically rather than with checkboxes.My list has checkboxes, but I want them to serve a different purpose. I'm using a cursor to hold my data and created a custom view binder for the SimpleCursorAdapter. I did this for the checkboxes and general flexibility.So far I haven't even been able to show one line as being selected. I've enabled multiple selection on the list and denied the children of the list item focusability. I've tried manually changing background color with the position fed in through the list item click listener. But the wrong items get changed and they don't even change to the right color. I've enabled touch focusability with no improvement either.Ideally, I'd like the trackball highlight focus bar to appear in multiple places. But I don't think this is possible unless you use the drawable directly. But I don't know how to find or apply it. My next idea was to have a slim view bar that changes color. But I had the same problem with the wrong item being selected so I never finished trying to guess the index position to see if this would work. My most recent idea is to completely swap out the view for another one if it's selected. But I have no idea how to do this either. I'm thinking of using an array list to store the _id s of the items that need a different view to get around the wierd selection problem. I'm also thinking of passing in the ID field as my from and the selection view as the to for my adapter. Then I'd intercept it with my binder and change the view accordingly. But once again, I'm not sure how to do this successfuly.

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Android :: List View And List Adapters For Displaying Json

May 3, 2010

I am trying to display the text from json in a list view.But my problem is that i cant figure out how to display them in list view. I also want to get only some of the text from url(for example, alerttext and date). Can anyone help me in declaring the list adapter and list view in order to display the data in the way i want.

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Android :: Add Childs To My Custom View Group With A Cursor Adapter?

Oct 13, 2010

I've got a schedule Class, which is simply a custom ViewGroup (with custom onMeasure() and onLayout()), which enables me to place childs(=events) with LayoutParams for column/row start and column/row end. The number of childs and their LayoutParams depend on database entries.

Now I'm trying to add childs (events) from my database. I'd have to use a Cursor Adapter, so my schedule Class has to extend ListView, right? I tried that but the newView() method of the adapter is never called. Why not? My custom ListView doesn't ask the adapter for childs, no childs are added. I also can't add the childs by hand calling schedule.addView() if I extend from AdapterView.

How can I add events to the schedule with the data from the cursor?

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Android :: How Can We Set Border To List Item In List View?

Jul 14, 2010

By Default in the Listview,focus will come on the list item.Instead of that, can I get only the border to the list item?I can achieve this by using a transparent image as a list selector.Is there any other simplest way to achieve this requirement?

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Android :: Add Text View Before List View In Linear Layout?

Mar 11, 2010

I've tried to add a TextView before a ListView in a LinearLayout. The result is that the ListView wont show at all. The same thing happens if I put the TextView after the ListView, but then I will only see the ListView. Is there a way to get a text view above the ListView without to much of a hassle?

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Android :: List View Focus - Child View As Background

Jun 25, 2010

In my app i'm setting background to each child views in listview. So that listview default focus ( orange color ) is not focusing. Is there any way to set both ( listview focus & child view background)?

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Android :: List View Fixed Height Of Child View

Jul 27, 2010

Please advice how to set fixed heigh (in dip) for the child view of ListView component? I am using relative layout as root layout for the child view when I set backgoround image to relative layout it becomes very height (maybe because backgoround picture is large) and I want to set precisely the height in dp.

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Android :: Increase View Size Of List View?

Oct 1, 2010

but no use even if try increasing the minheight....

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Here you put the rest of your current view-->

<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"........................

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Android :: Combining Map View And List View In Application

Aug 4, 2010

I am working on an application where I need to display some locations on a map and in a list view where the user should be able to toggle between these views(activities?). I want the toggle button(s) to be in my custom titlebar like in the images (if they are attached). What is the best practice for this? Tab view seems like a solution but can I customize the tab buttons? Should the map and list be in different activities or the same? Now I have two different activities one extending MapActivity and one extending ListActivity but no way to toggle between them. Is it possible to load activities into a FrameLayout?
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Android :: How To Set Opacity / Transparancy On View / List View Row?

Sep 2, 2010

In my code i have state for each row of content so in list view if row has state as read, i need to display it with opacity/ transparency but for the view there is no direct method to set alpha.

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Android :: How To Determine If View Is Visible In List View?

Aug 20, 2010

I want to be able to tell if a view is visible in my listview, which is populated by a custom CursorAdapter. How can I do this?

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Android :: Get Value Out Of Text View In List View

Jul 18, 2010

I have a click event hooked up to my listview.I need to pass a string param to the new intent based on which listitem they clicked on. The value I want to pass is in the listitem called txt_Genus. How do I get that value out of the listitem to pass to the intent?

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