Jason, thanks, that was exactly it, looks great now.
On Nov 6, 12:07 am, "Jason Parekh" <[EMAIL PROTECTED]> wrote:
> Hi Mark,
>
> The problem is when you do:
>
> > mcv.setLayoutParams(new
> > LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
> > LayoutParams.WRAP_CONTENT));
>
> A view's layout parameters should be the type its parent expects to see
> (because those parameters are really used for the layout (parent) to store
> metadata for that child). So, in this case, this mcv view wlil eventually
> go into a ListView, but you're saying to use LinearLayout.LayoutParams.
> Instead, try using ListView.LayoutParams.
>
> jason
>
> On Wed, Nov 5, 2008 at 1:09 PM, Mark Wyszomierski <[EMAIL PROTECTED]> wrote:
>
> > Hi Jason,
>
> > Could you show me the code of the View you're returning, to see if
> > that'll work for me instead?
>
> > Thanks
>
> > On Nov 4, 2:14 am, Mark Wyszomierski <[EMAIL PROTECTED]> wrote:
> > > Hi Jason,
>
> > > Thanks for the help, I'll post the stack trace below. Maybe I'm
> > > creating the view incorrectly. I tried something like:
>
> > > public class MyChildView extends LinearLayout
> > > {
> > > public MyChildView(Context context)
> > > {
> > > super(context);
> > > }
> > > }
>
> > > // Inside my BaseExpandableListAdapter extended class:
> > > public View getChildView(int groupPosition,
> > > int childPosition,
> > > boolean isLastChild,
> > > View convertView,
> > > ViewGroup parent)
> > > {
> > > MyChildView mcv = new
> > > MyChildView(MyAdapter.this.getContext());
> > > mcv.setLayoutParams(new
> > > LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
> > > LayoutParams.WRAP_CONTENT));
> > > mcv.setOrientation(LinearLayout.HORIZONTAL);
> > > mcv.addView(new ImageView(...));
> > > mcv.addView(new TextView(...));
> > > return mcv; // <-- exception after return.
> > > }
>
> > > Returning a TextView like in the API sample works ok. Here's the stack
> > > trace:
>
> > > 11-04 02:01:23.602: ERROR/AndroidRuntime(190): Uncaught handler:
> > > thread main exiting due to uncaught exception
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190):
> > > java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.ListView.setupChild(ListView.java:1646)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.ListView.makeAndAddView(ListView.java:1619)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.ListView.fillDown(ListView.java:601)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.ListView.fillSpecific(ListView.java:1189)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.ListView.layoutChildren(ListView.java:1454)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.AbsListView.onLayout(AbsListView.java:937)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.FrameLayout.onLayout(FrameLayout.java:294)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.layoutVertical(LinearLayout.java:999)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.onLayout(LinearLayout.java:920)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.FrameLayout.onLayout(FrameLayout.java:294)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.layoutVertical(LinearLayout.java:999)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.LinearLayout.onLayout(LinearLayout.java:920)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.widget.FrameLayout.onLayout(FrameLayout.java:294)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.View.layout(View.java:5637)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.ViewRoot.performTraversals(ViewRoot.java:771)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.view.ViewRoot.handleMessage(ViewRoot.java:1103)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.os.Handler.dispatchMessage(Handler.java:88)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.os.Looper.loop(Looper.java:123)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > android.app.ActivityThread.main(ActivityThread.java:3742)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > java.lang.reflect.Method.invokeNative(Native Method)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > java.lang.reflect.Method.invoke(Method.java:515)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > com.android.internal.os.ZygoteInit
> > > $MethodAndArgsCaller.run(ZygoteInit.java:739)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497)
> > > 11-04 02:01:23.851: ERROR/AndroidRuntime(190): at
> > > dalvik.system.NativeStart.main(Native Method)
>
> > > Thanks
>
> > > On Nov 4, 12:47 am, "Jason Parekh" <[EMAIL PROTECTED]> wrote:
>
> > > > Hi Mark,
>
> > > > I just tried as you suggested with the ExpandableList1 sample, and I
> > don't
> > > > see any exceptions. Can you print the stack of the exception you're
> > seeing?
>
> > > > You can browse the source athttp://git.source.android.com
>
> > > > jason
>
> > > > On Mon, Nov 3, 2008 at 2:33 PM, Mark Wyszomierski <[EMAIL PROTECTED]>
> > wrote:
>
> > > > > Hi,
>
> > > > > Trying to implement BaseExpandableListAdapter.getChildView() but it
> > > > > throws a class cast exception if I try returning any descendant of
> > > > > View, such as LinearLayout, or ViewGroup:
>
> > > > > public View BaseExpandableListAdapter.getChildView()
> > > > > {
> > > > > return new LinearLayout(..);
> > > > > }
>
> > > > > The API sample returns a TextView, which doesn't crash. What's
> > special
> > > > > about TextView that works, but ViewGroup will not? I thought they
> > both
> > > > > derive from View? This used to work in earlier versions of the SDK.
>
> > > > > Is there anything like browse source in svn that will let me just
> > look
> > > > > at the source of TextView online or do I have to download the entire
> > > > > source tree to do this?
>
> > > > > Thanks
>
>
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
-~----------~----~----~----~------~----~------~--~---
