我有一个可扩展的列表视图。我已经放了一些虚拟数据，并且evrything似乎没问题，但是当我运行应用程序时，所有组都处于折叠模式，当我点击它们时它们不会生效。还有一个问题是，只有点击列表而不是扩展，才能加载groupView上的图片。我希望图像默认加载。
ContactsFragment.java
public class ContactsFragment extends Fragment implements ExpandableListView.OnChildClickListener {
@SuppressWarnings("unused")
private ProgressDialog pDialog;
HashMap<String, String> listDataHeader;
ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
ArrayList<HashMap<String, String>> inboxList;
// products JSONArray
JSONArray inbox = null;
// Inbox JSON url
static final String URL = "http://api.androidhive.info/music/music.xml";
// XML node keys
static final String KEY_SONG = "song"; // parent node
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_ARTIST = "artist";
static final String KEY_DURATION = "duration";
static final String KEY_THUMB_URL = "thumb_url";
ListView lv;
ExpandableListAdapter adapter;
Button button1,buuton2;
/*HashMap<String, List<String>> listDataChild;*/
public static final String TAG = LibraryPagerAdapter.class.getSimpleName();
protected JSONArray mTasksData;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
private ArrayList<Object> childItems = new ArrayList<Object>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy =
new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
View rootView = inflater.inflate(R.layout.main, container, false);
expListView = (ExpandableListView) rootView.findViewById(R.id.lvExp);
bindListView();
setChildData();
/*System.out.println("Oncreate view songslist"+songsList);
System.out.println("Oncraeteview childitems"+childItems);*/
listAdapter = new ExpandableListAdapter(getActivity().getApplicationContext(), songsList, childItems);
// setting list adapter
expListView.setAdapter(listAdapter);
expListView.setOnChildClickListener(this);
expListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
Log.d("onGroupClick:", "worked");
parent.expandGroup(groupPosition);
return false;
}
});
// Listview Group expanded listener
expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
System.out.println("inside group expand");
}
});
// Listview Group collasped listener
expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
System.out.println("inside group collapse");
}
});
// Listview on child click listener
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
System.out.println("inside child click");
return false;
}
});
return rootView;
}
private void setChildData() {
System.out.println("I m in setChildData");
// TODO Auto-generated method stub
ArrayList<String> child = new ArrayList<String>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_SONG);
for (int i = 0; i < nl.getLength(); i++){
child.add("Audio");
child.add("Video");
childItems.add(child);
}
/*System.out.println(childItems);*/
}
public void bindListView() {
System.out.println("Inside bindListView");
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_SONG);
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
listDataHeader = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
listDataHeader.put(KEY_ID, parser.getValue(e, KEY_ID));
listDataHeader.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
listDataHeader.put(KEY_ARTIST, parser.getValue(e, KEY_ARTIST));
listDataHeader.put(KEY_DURATION, parser.getValue(e, KEY_DURATION));
listDataHeader.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL));
// adding HashList to ArrayList
songsList.add(listDataHeader);
}
System.out.println(songsList);
adapter = new ExpandableListAdapter(getActivity(), songsList, R.layout.inbox_list_item,
new String[] { KEY_THUMB_URL, KEY_TITLE,KEY_ARTIST,KEY_DURATION },
new int[] { R.id.list_image, R.id.title,R.id.artist,R.id.duration});
System.out.println("Before setting adapter"+adapter);
/* expListView.setAdapter(adapter);
System.out.println("after"+adapter);*/
}
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
return false;
}
/*class LoadInbox extends AsyncTask<String, String, String> {
protected String doInBackground(String... args) {
// Building Parameters
}
*//**
* After completing background task Dismiss the progress dialog
* **//*
protected void onPostExecute(String file_url) {
getActivity().runOnUiThread(new Runnable() {
public void run() {
try{
// dismiss the dialog after getting all proKEY_THUMB_URLducts
adapter = new LazyAdapter(getActivity(), songsList, R.layout.inbox_list_item,
new String[] { KEY_THUMB_URL, KEY_TITLE,KEY_ARTIST,KEY_DURATION },
new int[] { R.id.list_image, R.id.title,R.id.artist,R.id.duration});
lv.setAdapter(adapter);
System.out.println(adapter);
}catch(Exception e){
e.printStackTrace();
}
}
});
}
protected JSONArray doInBackground(Object... params) {
// TODO Auto-generated method stub
return null;
}*/
}
ExpandableListAdapter.java
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private int inbox;
String[] arr;
int[] is1;
private Context context;
private Activity activity;
private ArrayList<HashMap<String, String>> songsList; // header titles
// child data in format of header title, child title
private ArrayList<Object> childItems;
private ArrayList<Object> childtems1;
private LayoutInflater inflater1;
private ArrayList<String> parentItems, child;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public ExpandableListAdapter(FragmentActivity activity2,
ArrayList<HashMap<String, String>> songsList, int inboxListItem,
String[] strings, int[] is) {
System.out.println("inside constructor");
activity = activity2;
data=songsList;
inbox=inboxListItem;
arr=strings;
is1=is;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public ExpandableListAdapter(Context context, ArrayList<HashMap<String, String>> songsList,
ArrayList<Object> childItems) {
System.out.println("inside second constructor");
this.context=context;
data = songsList;
this.childItems = childItems;
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(context.getApplicationContext());
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return null;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@SuppressWarnings("unchecked")
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
System.out.println("Inside child view");
child = (ArrayList<String>) childtems1.get(groupPosition);
TextView textView = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, null);
}
// get the textView reference and set the value
textView = (TextView) convertView.findViewById(R.id.textViewChild);
textView.setText(child.get(childPosition));
// set the ClickListener to handle the click event on child item
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(activity, child.get(childPosition),
Toast.LENGTH_SHORT).show();
}
});
return convertView;
/*final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
Button ListChild = (Button) convertView
.findViewById(R.id.lblListItem);
Button ListChild1 = (Button) convertView
.findViewById(R.id.lblListItem1);
ListChild.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
System.out.println("Inside onclick");
}
});
ListChild1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
System.out.println("Inside onclick");
}
});
return convertView;*/
}
@SuppressWarnings("unchecked")
/*public int getChildrenCount(int groupPosition) {
System.out.println(childItems.size());
return childItems.size();
}*/
@Override
public Object getGroup(int groupPosition) {
return null;
}
@Override
public int getGroupCount() {
System.out.println("The group count is"+data.size());
return data.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.list_row, null);
System.out.println("Inside group view");
TextView title = (TextView)vi.findViewById(R.id.title); // title
TextView artist = (TextView)vi.findViewById(R.id.artist); // artist name
TextView duration = (TextView)vi.findViewById(R.id.duration); // duration
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
HashMap<String, String> song = new HashMap<String, String>();
song = data.get(groupPosition);
// Setting all values in listview
title.setText(song.get(CustomizedListView.KEY_TITLE));
artist.setText(song.get(CustomizedListView.KEY_ARTIST));
duration.setText(song.get(CustomizedListView.KEY_DURATION));
imageLoader.DisplayImage(song.get(CustomizedListView.KEY_THUMB_URL), thumb_image);
return vi;
/* String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;*/
}
@Override
public void onGroupCollapsed(int groupPosition)
{
Toast.makeText( context, "Group collapse)",
Toast.LENGTH_LONG).show();
System.out.println("group collapsed");
super.onGroupCollapsed(groupPosition);
}
@Override
public void onGroupExpanded(int groupPosition)
{
Toast.makeText( context, "Group expanded)",
Toast.LENGTH_LONG).show();
System.out.println("Group expanded");
super.onGroupExpanded(groupPosition);
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return 0;
}
}
list_row.java
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/list_selector"
android:orientation="horizontal"
android:padding="5dip" >
<!-- ListRow Left sied Thumbnail image -->
<LinearLayout
android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip"
android:background="@drawable/image_bg"
android:padding="3dip" >
<ImageView
android:focusable="false"
android:id="@+id/list_image"
android:layout_width="50dip"
android:layout_height="50dip"
android:src="@drawable/rihanna" />
</LinearLayout>
<!-- Title Of Song -->
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:focusable="false"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:text="Rihanna Love the way lie"
android:textColor="#040404"
android:textSize="15dip"
android:textStyle="bold"
android:typeface="sans" />
<!-- Artist Name -->
<TextView
android:id="@+id/artist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/title"
android:layout_marginTop="1dip"
android:layout_toRightOf="@+id/thumbnail"
android:focusable="false"
android:text="Just gona stand there and ..."
android:textColor="#343434"
android:textSize="10dip" />
<!-- Rightend Duration -->
<TextView
android:id="@+id/duration"
android:focusable="false"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@id/title"
android:layout_marginRight="5dip"
android:gravity="right"
android:text="5:45"
android:textColor="#10bcc9"
android:textSize="10dip"
android:textStyle="bold" />
<!-- Rightend Arrow -->
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:focusable="false"
android:layout_centerVertical="true"
android:src="@drawable/arrow" />
</RelativeLayout>
答案 0 :(得分：0)
请参考这个与urs类似的问题，关于可关注的项目，
expandablelistview is not getting expanded when checkbox is added in parent xml
并尝试将android：descendantFocusability =＆＃34; blocksDescendants＆＃34;在你的相对布局