Hi, I have a problem with ExpandableListView crash. When an ExpaldableListView first starts with empty cursor (cursor without data row) and later on change a cursor with data row. There is 100% chance the ExpandableListView will crash when expand mainGroup item. I am not sure is it a bug in Android because I can't find any bug in my code. Below is the step i used to reproduce the crash
(1) In onCreate, create simpleCursorTreeAdapter and make sure the data set returned is empty. (2) In onCreate, add the simpleCursorTreeAdapter to an ExpandableListView (3) when button "add" is clickked, i will do myAdapter.getCursor ().reQuery(); myAdapter.notifyDataSetChanged() (4) At this point, there will be a newly added and the only row in ExpandableListAdapter. (5) Click on the item to make the list expand. Then my program will crash. Note: It doesn't matter if there is child row under the group i clicked. it will just crash. ####################Logcat report#################### 5971 AndroidRuntime E java.lang.NullPointerException 5971 AndroidRuntime E at android.widget.SimpleCursorTreeAdapter.bindView (SimpleCursorTreeAdapter.java:200) 5971 AndroidRuntime E at android.widget.SimpleCursorTreeAdapter.bindChildView (SimpleCursorTreeAdapter.java:218) 5971 AndroidRuntime E at android.widget.CursorTreeAdapter.getChildView(CursorTreeAdapter.java: 250) 5971 AndroidRuntime E at com.smart.expense.expense2$myMainExpandableListAdapter.getChildView (expense2.java:578) 5971 AndroidRuntime E at android.widget.ExpandableListConnector.getView (ExpandableListConnector.java:451) 5971 AndroidRuntime E at android.widget.AbsListView.obtainView(AbsListView.java: 1272) 5971 AndroidRuntime E at android.widget.ListView.measureHeightOfChildren(ListView.java: 1142) 5971 AndroidRuntime E at android.widget.ListView.onMeasure(ListView.java:1055) 5971 AndroidRuntime E at android.view.View.measure (View.java:7117) 5971 AndroidRuntime E at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime E at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java: 888) 5971 AndroidRuntime E at android.widget.LinearLayout.measureVertical(LinearLayout.java:350) 5971 AndroidRuntime E at android.widget.LinearLayout.onMeasure(LinearLayout.java:278) 5971 AndroidRuntime E at android.view.View.measure (View.java:7117) 5971 AndroidRuntime E at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime E at android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 5971 AndroidRuntime E at android.view.View.measure (View.java:7117) 5971 AndroidRuntime E at android.widget.LinearLayout.measureVertical(LinearLayout.java:464) 5971 AndroidRuntime E at android.widget.LinearLayout.onMeasure(LinearLayout.java:278) 5971 AndroidRuntime E at android.view.View.measure (View.java:7117) 5971 AndroidRuntime E at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime E at android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 5971 AndroidRuntime E at android.view.View.measure (View.java:7117) 5971 AndroidRuntime E at android.view.ViewRoot.performTraversals(ViewRoot.java:713) 5971 AndroidRuntime E at android.view.ViewRoot.handleMessage(ViewRoot.java:1504) 5971 AndroidRuntime E at android.os.Handler.dispatchMessage(Handler.java:99) 5971 AndroidRuntime E at android.os.Looper.loop (Looper.java:123) 5971 AndroidRuntime E at android.app.ActivityThread.main(ActivityThread.java:3948) 5971 AndroidRuntime E at java.lang.reflect.Method.invokeNative(Native Method) 5971 AndroidRuntime E at java.lang.reflect.Method.invoke(Method.java:521) 5971 AndroidRuntime E at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:782) 5971 AndroidRuntime E at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 5971 AndroidRuntime E at dalvik.system.NativeStart.main(Native Method) -- 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
