Android Expandable ListView "The following classes could not be instantiated"
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I want to use an ExpandableListView in my Android project. I create a String Array called "colors" with different items with the String.xml-Resources editor. Then I put "android.entries="@array/colors" to the layout-properties of the ExpandableListView in the main.xml. At first the following error occurs: "The following classes could not be found", Change to android.widget.ExpandableListView.  So I change "ExpandableListView" to "android.widget.ExpandableListView" in the main.xml. But then I get the following error: "The following classes could not be instantiated: android.widget.ExpandableListView (Open Class, Show Error Log). See the Error Log (Window -> Show View) for more details.". How can I solve that problem ? And is there any good tutorial on Android-ExpandableListView ? Thanks in advance.