[android-developers] Re: dynamic listview problem: would like EditText change to trigger another EditText change
Have you considered just making your custom objects views?
You can make the object extend a LinearLayout and place a EditText in it and
have your view and data structure all as one object.
Then you can just keep an array of these objects and when one changes, just
iterator over them and change them all.
I do something like...
public class CustomItem extends LinearLayout
{
private EditView evView;
// Additional data fields here.
public void createView( LayoutInflater inflater )
{
inflater.inflate( R.layout.item, this, true );
evView = (EditView )findViewById( R.id.evView);
}
public void populate()
{
// Populate data here.
}
}
Just create the array of object, populate them, create their internal view
and return the objects via index in an ArrayAdapter to a ListView.
CustomItem[] ciList = new CustomItem[ x ];
Use a for loop or whatever processing loop you use to get the data and in
each:
ciList[x] = new CustomItem();
ciList[x].populate();
ciList[x].createView( inflater ); // I do an LayoutInflater.from( context )
and reuse it.
Then in the ArrayAdapter:
public int getCount() { return ciList.length; }
public View getView( int position,
Viewhttp://developer.android.com/reference/android/view/View.htmlconvertView,
ViewGrouphttp://developer.android.com/reference/android/view/ViewGroup.htmlparent
)
{
return ciList[ position ];
}
Now when you get a press/long press or any other action in a callback, type
the returned view to your class and all the data is right there for you to
use.
Steven
Studio LFP
http://www.studio-lfp.com
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Re: [android-developers] Re: dynamic listview problem: would like EditText change to trigger another EditText change
On Wed, Sep 28, 2011 at 12:17 PM, Studio LFP studio@gmail.com wrote: Just create the array of object, populate them, create their internal view and return the objects via index in an ArrayAdapter to a ListView. This of course throws out the recycling optimization ListVIew does, so may not be practical for large data sets. - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: dynamic listview problem: would like EditText change to trigger another EditText change
On Wednesday, September 28, 2011 12:49:15 PM UTC-5, TreKing wrote: On Wed, Sep 28, 2011 at 12:17 PM, Studio LFP studi...@gmail.com wrote: Just create the array of object, populate them, create their internal view and return the objects via index in an ArrayAdapter to a ListView. This of course throws out the recycling optimization ListVIew does, so may not be practical for large data sets.http://sites.google.com/site/rezmobileapps/treking You can easily get around this by using an ArrayList that can be added to or removed from as needed and adding lazy loading to the object to get the data and populate the view when it is asked to show itself. Based on what he is trying to do, he's still holding all the data anyway. Putting it in a view object instead of just a regular object doesn't add that much memory, but makes the application a ton faster and a lot easier to write. Those alone make it worth it. Steven Studio LFP http://www.studio-lfp.com -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: dynamic listview problem: would like EditText change to trigger another EditText change
Mr. Goche, How much data and what is the source of the data you are using to create the EditText views? Knowing the data load and its source would help a lot. Steven Studio LFP http://www.studio-lfp.com -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
