Kostya,
Thank you SO much for taking the time to reply. I guess the next rookie
question would be: "Do I get the source code for the SimpleCursorTreeAdapter
and modify it to build my own"
I was playing around with that idea and when I tried to overwrite the method
below, my custom adapter didn't recognize the variables mChildFrom and
mChildTo. I assumed that with apis after level 4 had changed the parent
classes that define and assign those arrays.
@Override
protected void bindChildView(View view, Context context, Cursor cursor,
boolean isLastChild) {
bindView(view, context, cursor, mChildFrom, mChildTo);
}
I'm ok with the idea of building my own adapter from the "base" adapters.
I'm just not sure how to access the source code, what is derived from the
parent classes etc. I'm sorry if these questions seems stupid, but I've only
been at this for about a month.
Alos, if I look at the documentation here
http://developer.android.com/reference/android/widget/SimpleCursorTreeAdapter.htmland
filter it on API level 4, I don't see a bindView method. Is the method
inherited?
One last question, to be clear on your suggestion, is that I override the
bindChildView and bindGroupView methods?
Again, thank you for replying.
On Fri, Feb 11, 2011 at 11:26 AM, Kostya Vasilyev <[email protected]>wrote:
> Richard,
>
> Adapter view binders are only a convenience feature, and you can always
> skip to the real stuff.
>
> SimpleCursorTreeAdapter has this private method where mViewBinder is used:
>
> private void bindView(View view, Context context, Cursor cursor, int[]
> from, int[] to) {
> ViewBinder binder = mViewBinder;
> for (int i = 0; i < to.length; i++) {
> if (binder != null) {
> bound = binder.setViewValue(v, cursor, from[i]);
> }
> ... default case for when there is no binder ...
> }
> }
>
> This method is called from public, API level 1, override-able SDK methods:
>
> @Override
> protected void bindChildView(View view, Context context, Cursor cursor,
> boolean isLastChild) {
> bindView(view, context, cursor, mChildFrom, mChildTo);
> }
>
> @Override
> protected void bindGroupView(View view, Context context, Cursor cursor,
> boolean isExpanded) {
> bindView(view, context, cursor, mGroupFrom, mGroupTo);
> }
>
> So - override bindChildView / bindGroupView to format and set the values
> any way you like. You can even make your own MyBinder class and follow the
> general structure as above.
>
> Also, if you're not using automatic view binding, your might as well derive
> your adapter from ResourceCursorTreeAdapter.
>
> In general, my impression of Simple*Adapter classes is that they are like
> bicycles for small children (those with little wheels on the sides) - not a
> bad way to start, but you outgrow them pretty quickly.
>
> -- Kostya
>
> 11.02.2011 11:41, Richard Marsh пишет:
>
> Hi everyone
>>
>> I've been stuck on this issue for a couple of days now and I think I'm
>> close to murder, so any help would be greatly appreciated.
>>
>> First just a little context.
>>
>> I have a db with a Budget and Category tables. The fields are _id
>> ,CategoryID, Item and Amount. The amount is stored as a double. I've written
>> my own db adapters and they are working no problem. So with lots of reading
>> and searching I finally get my ExpandablListView to populate using my
>> slightly modified SimpleCursorTreeAdapter. My custom adapter just changes
>> the GetChildrenCursor to return the children associated with each category.
>>
>> Now here's the problem:
>>
>> The amount value is shown in the list and I would like to format how the
>> value is displayed into a local currency. The formatting isn't the issue.
>> The issue is that I can use a ViewBinder but only if I use API level 5 and
>> up. But I want to use API level 4 and up.
>>
>> So how do I change the way the data is displayed in my list items, without
>> having to use a viewbinder... or at least, working withing the API 4
>> framework.
>>
>> ANY advice or ideas would be appreciated!
>>
>> Kind regards --
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>
>
> --
> Kostya Vasilyev -- WiFi Manager + pretty widget --
> http://kmansoft.wordpress.com
>
>
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