Kostya Brilliant! I'm going to get stuck in with this, this weekend and hopefully get it right. I did try something similar to what you mentioned, but I wasn't sure if i was on the right track and when it didn't work (most likely something I did wrong) moved on. I have a much better idea of what you mean now and what the gist should be.
I honestly can't thank you enough for your advice. Hopefully I won't need to bother you again. Kind regards On Fri, Feb 11, 2011 at 2:40 PM, Kostya Vasilyev <kmans...@gmail.com> wrote: > Richard, > > To keep it simple, I would recommend: > > 1. Override bindChildView and set your floating point value "manually". You > can get the value from the cursor, call findViewById() on the view that's > passed it to get the TextView that should show the value, format the value > as a string, and then call > amountTextTiew.setText(formattedAmountValueString); > > 2. Call the base class bindChildView from your own to take care of all the > other data items / views except the floating point one. > > 3. Pass from/to arrays to SimpleCursorTreeAdapter that have all data item / > view IDs - except the floating point amount data item, which is handled by > pt. 1. > > With this, you won't need to do too much work in your overrides, won't need > to copy and modify any code from Android, won't need access to private data > members of SimpleCursorTreeAdapter, and won't need to rely on ViewBinder > that only appeared in API level 5: > > > http://developer.android.com/reference/android/widget/SimpleCursorTreeAdapter.ViewBinder.html > > -- Kostya > > PS - I find it very useful to have Android framework source code in > Eclipse. Instead of hunting through the source code repository, it lets me > open source code by class name, by pressing Ctrl+Shift+T. > > 11.02.2011 12:38, Richard Marsh пишет: > > 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 <kmans...@gmail.com>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 -- >>> 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 >>> >> >> >> -- >> Kostya Vasilyev -- WiFi Manager + pretty widget -- >> http://kmansoft.wordpress.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 >> > > -- > 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 > > > > -- > Kostya Vasilyev -- WiFi Manager + pretty widget -- > http://kmansoft.wordpress.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 > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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