我正在尝试使用自定义组和列表布局实现自定义ExpandableListView。
我跟着this guide并研究了其他例子。但是，我得到了这个例外：
抛出java.lang.ClassNotFoundException
你知道我做错了吗？
android.view.InflateException: Binary XML file line #24: Class is not a View com.jws.rapp.DeparturesExpandableListView
at android.view.LayoutInflater.createView(LayoutInflater.java:611)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.jws.rapp.DeparturesFragment.onCreateView(DeparturesFragment.java:35)
at android.app.Fragment.performCreateView(Fragment.java:1695)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
at android.app.BackStackRecord.run(BackStackRecord.java:682)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:474)
at android.support.v13.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:167)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
at android.view.View.measure(View.java:15848)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:477)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189)
at android.view.View.measure(View.java:15848)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
at android.view.Choreographer.doCallbacks(Choreographer.java:562)
at android.view.Choreographer.doFrame(Choreographer.java:532)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: com.jws.rapp.DeparturesExpandableListView cannot be cast to android.view.View
at java.lang.Class.asSubclass(Class.java:1182)
at android.view.LayoutInflater.createView(LayoutInflater.java:559)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.jws.rapp.DeparturesFragment.onCreateView(DeparturesFragment.java:35)
at android.app.Fragment.performCreateView(Fragment.java:1695)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
at android.app.BackStackRecord.run(BackStackRecord.java:682)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:474)
at android.support.v13.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:167)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
at android.view.View.measure(View.java:15848)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:477)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:15848)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189)
at android.view.View.measure(View.java:15848)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
at android.view.Choreographer.doCallbacks(Choreographer.java:562)
at android.view.Choreographer.doFrame(Choreographer.java:532)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
import java.util.ArrayList;
public class DepartureOverview {
private String route;
private String destination;
private int timeToDeparture;
// ArrayList to store child objects
private ArrayList<DepartureDetails> children;
public String getRoute()
{
return route;
}
public void setRoute(String route)
{
this.route = route;
}
public String getDestination()
{
return destination;
}
public void setDestination(String destination)
{
this.destination = destination;
}
public int getTimeToDeparture()
{
return timeToDeparture;
}
public void setTimeToDeparture(int timeToDeparture)
{
this.timeToDeparture = timeToDeparture;
}
// ArrayList to store child objects
public ArrayList<DepartureDetails> getChildren()
{
return children;
}
public void setChildren(ArrayList<DepartureDetails> children)
{
this.children = children;
}
}
public class DepartureDetails {
private String name;
private String text1;
private String text2;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getText1()
{
return text1;
}
public void setText1(String text1)
{
this.text1 = text1;
}
public String getText2()
{
return text2;
}
public void setText2(String text2)
{
this.text2 = text2;
}
}
public class DeparturesExpandableListView extends ExpandableListActivity {
//Initialize variables
private ArrayList<DepartureOverview> departures;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
/*Resources res = this.getResources();
Drawable devider = res.getDrawable(R.drawable.line);
// Set ExpandableListView values
getExpandableListView().setGroupIndicator(null);
getExpandableListView().setDivider(devider);
getExpandableListView().setChildDivider(devider);
getExpandableListView().setDividerHeight(1);
registerForContextMenu(getExpandableListView());*/
// Adding ArrayList data to ExpandableListView values
loadHosts(buildDummyData());
}
private ArrayList<DepartureOverview> buildDummyData()
{
// Creating ArrayList of type parent class to store parent class objects
final ArrayList<DepartureOverview> list = new ArrayList<DepartureOverview>();
for (int i = 1; i < 4; i++)
{
//Create parent class object
final DepartureOverview parent = new DepartureOverview();
// Set values in parent class object
parent.setRoute(i + "A");
parent.setDestination("Søndervangen");
parent.setTimeToDeparture((int) System.currentTimeMillis() / 1000);
parent.setChildren(new ArrayList<DepartureDetails>());
// Create Child class object
final DepartureDetails child = new DepartureDetails();
child.setName("" + i);
child.setText1("Child 0");
//Add Child class object to parent class object
parent.getChildren().add(child);
//Adding Parent class object to ArrayList
list.add(parent);
}
return list;
}
private void loadHosts(final ArrayList<DepartureOverview> newDepartures)
{
if (newDepartures == null)
return;
departures = newDepartures;
// Check for ExpandableListAdapter object
if (this.getExpandableListAdapter() == null)
{
//Create ExpandableListAdapter Object
final DeparturesExpandableListAdapter mAdapter = new DeparturesExpandableListAdapter(getApplicationContext(), departures);
// Set Adapter to ExpandableList Adapter
this.setListAdapter(mAdapter);
}
else
{
// Refresh ExpandableListView data
((DeparturesExpandableListAdapter)getExpandableListAdapter()).notifyDataSetChanged();
}
}
}
public class DeparturesExpandableListAdapter extends BaseExpandableListAdapter {
private LayoutInflater inflater;
private ArrayList<DepartureOverview> departures;
Context context;
public DeparturesExpandableListAdapter(Context context, ArrayList<DepartureOverview> departures)
{
this.context = context;
inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
this.departures = departures;
}
// This Function used to inflate parent rows view
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parentView)
{
final DepartureOverview departure = departures.get(groupPosition);
// Inflate grouprow.xml file for parent rows
convertView = inflater.inflate(R.layout.view_departure_overview, parentView, false);
// Get grouprow.xml file elements and set values
((TextView) convertView.findViewById(R.id.route)).setText(departure.getRoute());
((TextView) convertView.findViewById(R.id.destination)).setText(departure.getDestination());
((TextView) convertView.findViewById(R.id.departureIn)).setText(departure.getTimeToDeparture());
return convertView;
}
// This Function used to inflate child rows view
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parentView)
{
final DepartureOverview departureOverview = departures.get(groupPosition);
final DepartureDetails departureDetails = departureOverview.getChildren().get(childPosition);
// Inflate childrow.xml file for child rows
convertView = inflater.inflate(R.layout.view_departure_details, parentView, false);
return convertView;
}
@Override
public Object getChild(int groupPosition, int childPosition)
{
return departures.get(groupPosition).getChildren().get(childPosition);
}
//Call when child row clicked
@Override
public long getChildId(int groupPosition, int childPosition)
{
return childPosition;
}
@Override
public int getChildrenCount(int groupPosition)
{
if(departures.get(groupPosition).getChildren() != null)
return departures.get(groupPosition).getChildren().size();
return 0;
}
@Override
public Object getGroup(int groupPosition)
{
return departures.get(groupPosition);
}
@Override
public int getGroupCount()
{
return departures.size();
}
//Call when parent row clicked
@Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
@Override
public void notifyDataSetChanged()
{
// Refresh List rows
super.notifyDataSetChanged();
}
@Override
public boolean isEmpty()
{
return ((departures == null) || departures.isEmpty());
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
@Override
public boolean hasStableIds()
{
return true;
}
@Override
public boolean areAllItemsEnabled()
{
return true;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.jws.rapp.Settings">
<!-- TODO: Update blank fragment layout -->
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/departures"
style="@style/Title"/>
<TextView
android:id="@+id/stationName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="test"
style="@style/H1"
android:gravity="center"
android:layout_below="@id/title"/>
<com.jws.rapp.DeparturesExpandableListView
android:layout_width="match_parent"
android:layout_height="wrap_content">
</com.jws.rapp.DeparturesExpandableListView>
</RelativeLayout>