我决定将listview作为动态数据，从xml文件中获取详细信息，并显示标题及其图像。
我能够使用带有可扩展列表和listview作为子项的导航抽屉。
继承我的代码：
public class HomeActivity extends Activity {
// All static variables
static final String URL = "http://test.test.com/vrp/scripts/vrp_data.xml";
// XML node keys
static final String KEY_ELEMENTS = "elements"; // parent node
static final String KEY_ID = "id";
public static final String KEY_TITLE = "title";
public static final String KEY_THUMB_URL = "thumb_url";
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
public DrawerLayout drawer;
ImageView navDrawerBtn;
HashMap<String, List<String>> listDataChild;
List<String> listDataHeader;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
navDrawerBtn = (ImageView)findViewById(R.id.headerDrawer);
expListView = (ExpandableListView) findViewById(R.id.lvExp);
if(android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
expListView.setIndicatorBounds(402,465);
} else {
expListView.setIndicatorBoundsRelative(402,465);
}
drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
prepareListData();
navDrawerBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(!drawer.isDrawerOpen(expListView)) {
drawer.openDrawer(expListView);
} else {
drawer.closeDrawer(expListView);
}
}
});
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// Listview Group click listener
expListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
// Toast.makeText(getApplicationContext(),
// "Group Clicked " + listDataHeader.get(groupPosition),
// Toast.LENGTH_SHORT).show();
return false;
}
});
// Listview Group expanded listener
expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition) + " Expanded",
Toast.LENGTH_SHORT).show();
}
});
// Listview Group collasped listener
expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition) + " Collapsed",
Toast.LENGTH_SHORT).show();
}
});
// 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
Toast.makeText(
getApplicationContext(),
listDataHeader.get(groupPosition)
+ " : "
+ listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition), Toast.LENGTH_SHORT)
.show();
return false;
}
});
}
/*
* Preparing the list data
*/
@SuppressWarnings("unchecked")
private void prepareListData() {
listDataHeader = new ArrayList<String>();
//listDataChild = new HashMap<String, List<String>>();
List<HashMap<String, String>> listDataChild = new ArrayList<HashMap<String, String>>();
com.edataservices.utilities.XMLParser parser = new com.edataservices.utilities.XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_ELEMENTS);
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL));
// adding HashList to ArrayList
listDataChild.add(map);
// Adding child data
listDataHeader.add("VRP Medical Bay");
//listDataHeader.add("");
//listDataHeader.add("");
// Adding child data
List<String> listUnderVRP = new ArrayList<String>();
listUnderVRP.add("eDataClinical");
listUnderVRP.add("Schedule");
listUnderVRP.add("View Messages");
listUnderVRP.add("Reports for Signature");
listUnderVRP.add("View Billing");
listUnderVRP.add("View State");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable Me 2");
nowShowing.add("Turbo");
nowShowing.add("Grown Ups 2");
nowShowing.add("Red 2");
nowShowing.add("The Wolverine");
List<String> comingSoon = new ArrayList <String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacular Now");
comingSoon.add("The Canyons");
comingSoon.add("Europa Report");
((HashMap<String, List<String>>) listDataChild).put(listDataHeader.get(0), listDataChild); // HeAndroid Custom ListView with Image and Textader, Child data
//listDataChild.put(listDataHeader.get(1), nowShowing);
//listDataChild.put(listDataHeader.get(2), comingSoon);
}
}
public int GetPixelFromDips(float pixels) {
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
return (int) (pixels * scale + 0.5f);
}
}
以下是可扩展列表适配器的代码：
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
//private LayoutInflater vi;
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public com.edataservices.utilities.ImageLoader imageLoader;
public ExpandableListAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
//vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
//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);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
ImageView thumbImage = (ImageView) convertView
.findViewById(R.id.thumbnail);
HashMap<String, String> values = new HashMap<String, String>();
values = data.get(groupPosition);
txtListChild.setText(values.get(HomeActivity.KEY_TITLE));
imageLoader.DisplayImage(values.get(HomeActivity.KEY_THUMB_URL), thumbImage);
//txtListChild.setText(values.get(key));
//thumbImage
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
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);
}
Typeface tf = Typeface.createFromAsset(myClass(_context),
"fonts/Roboto-Regular.ttf");
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(tf);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public AssetManager myClass(Context myContext) {
AssetManager mngr = myContext.getAssets();
return mngr;
}
}