When I'm going to Build my project it give this error message.
Error:Error: This class should provide a default constructor (a public constructor with no arguments) (status.PURPLE.sameera.phonestatus.ExpandableListAdapter) [Instantiatable]
I can run the app with USB Debugging without any errors. However, the error happens when I build an APK.
This is ExpandableListAdapter.java
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@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);
txtListChild.setText(childText);
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);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
This is MyActivity.java
public class MyActivity extends ActionBarActivity {
//Listview
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
// get the listview
expListView = (ExpandableListView) findViewById(R.id.lvExp);
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
}
//preparing list data
private void prepareListData(){
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
listDataHeader.add("Top 250");
listDataHeader.add("Now Showing");
listDataHeader.add("Coming Soon..");
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshank Redemption");
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
}
Logcat
07-18 10:00:01.380 1250-1250/status.PURPLE.sameera.phonestatus W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
07-18 10:00:01.388 1250-1250/status.PURPLE.sameera.phonestatus E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from GradienCache
07-18 10:00:01.396 1250-1250/status.PURPLE.sameera.phonestatus E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
07-18 10:00:01.424 1250-1250/status.PURPLE.sameera.phonestatus E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
07-18 10:00:01.432 1250-1250/status.PURPLE.sameera.phonestatus E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
07-18 10:00:09.788 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:09.892 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:09.964 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.028 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.076 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.120 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.164 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.212 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
07-18 10:00:10.260 1250-1250/status.PURPLE.sameera.phonestatus E/eglCodecCommon﹕ **** ERROR unknown type 0xfc00 (glSizeof,73)
you have to provide default super() and change your adapter's name because there is already ExpandableListAdapter in android. Suppose you rename your adapter class to CustomExpandableListAdapter. So, constructor should be
public CustomExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
super();
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}