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<ExpandableListView
android:id="@+id/exListView"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>
setContentView(R.layout.main);
总报错:Your content must have a ExpandableListView whose id attribute is 'android.R.id.
<ExpandableListView
android:id="@id/android:list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>