I'm doing a ListView Expandable , but when I try to upload the data from the server it does not work just with static data. Any suggestions?
There is the MainActivity class
String[] parent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressDialog = new ProgressDialog(MainActivity.this);
requestQueue = Volley.newRequestQueue(MainActivity.this);
Hijos();
secondLevel.add(blusas);
secondLevel.add(accesorio);
thirdLevelBlusas.put(blusas[0], Escote);
thirdLevelBlusas.put(blusas[1], Larga);
thirdLevelBlusas.put(blusas[2], Corta);
thirdLevelAccesorio.put(accesorio[0], Collar);
thirdLevelAccesorio.put(accesorio[1], Reloj);
thirdLevelAccesorio.put(accesorio[2], Anillo);
thirdLevelAccesorio.put(accesorio[3], Pulsera);
data.add(thirdLevelAccesorio);
data.add(thirdLevelBlusas);
expandableListView = (ExpandableListView) findViewById(R.id.expandible_listview);
ThreeLevelListAdapter threeLevelListAdapterAdapter = new ThreeLevelListAdapter(this, parent, secondLevel, data);
expandableListView.setAdapter( threeLevelListAdapterAdapter );
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
int previousGroup = -1;
@Override
public void onGroupExpand(int groupPosition) {
if (groupPosition != previousGroup)
expandableListView.collapseGroup(previousGroup);
previousGroup = groupPosition;
}
});
}
public void Hijos() {
progressDialog.setMessage("Espere...");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,Categorias.DATA_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String ServerResponse) {
progressDialog.dismiss();
try {
JSONObject j = new JSONObject(ServerResponse);
String returnState= j.getString("returnState");
String returnData= j.getString("returnData");
JSONObject mainObject= new JSONObject(returnData);
Iterator<String> keys = mainObject.keys();
while (keys.hasNext()) {
String key = keys.next();
Log.i("Parser", "objeto : " + key);
JSONObject jsonObject1 = mainObject.getJSONObject(key);
String cate_name= jsonObject1.getString("cate_name");
String cate_id= jsonObject1.getString("cate_shop_id");
parent=new String[]{cate_id};
}
Toast.makeText(MainActivity.this," : "+n, Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
,
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Toast.makeText(MainActivity.this,"Verifique su conexion", Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("id",id);
return params;
}
};
// Creating RequestQueue.
RequestQueue requestQueue = Volley.newRequestQueue(MainActivity.this);
// Adding the StringRequest object into requestQueue.
requestQueue.add(stringRequest);
}
}
class ThreeLevelListAdapter
public class ThreeLevelListAdapter extends BaseExpandableListAdapter {
String[] parentHeaders;
List<String[]> secondLevel;
private Context context;
List<LinkedHashMap<String, String[]>> data;
public ThreeLevelListAdapter(Context context, String[] parentHeader, List<String[]> secondLevel, List<LinkedHashMap<String, String[]>> data) {
this.context = context;
this.parentHeaders = parentHeader;
this.secondLevel = secondLevel;
this.data = data;
}
@Override
public int getGroupCount() {
return parentHeaders.length;
}
@Override
public int getChildrenCount(int groupPosition) {
// no idea why this code is working
return 1;
}
@Override
public Object getGroup(int groupPosition) {
return groupPosition;
}
@Override
public Object getChild(int group, int child) {
return child;
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_first, null);
TextView text = (TextView) convertView.findViewById(R.id.rowParentText);
text.setText(this.parentHeaders[groupPosition]);
return convertView;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
final SecondLevelExpandableListView secondLevelELV = new SecondLevelExpandableListView(context);
String[] headers = secondLevel.get(groupPosition);
List<String[]> childData = new ArrayList<>();
HashMap<String, String[]> secondLevelData=data.get(groupPosition);
for(String key : secondLevelData.keySet())
{
childData.add(secondLevelData.get(key));
}
secondLevelELV.setAdapter(new SecondLevelAdapter(context, headers,childData));
secondLevelELV.setGroupIndicator(null);
secondLevelELV.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
int previousGroup = -1;
@Override
public void onGroupExpand(int groupPosition) {
if(groupPosition != previousGroup)
secondLevelELV.collapseGroup(previousGroup);
previousGroup = groupPosition;
}
});
return secondLevelELV;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}}
