I am sorting JSONArray and show them in a custom list view, but after sorting the data does not changed in custom list view.
Here is my code for fab button to select which sort is to be perform:
fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builder builder=new AlertDialog.Builder(SearchResult.this); builder.setTitle("Sort List Item"); builder.setItems(new CharSequence[]{"By Name", "By Father Name","By EPIC","By House Number"}, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { switch (i) { case 0: Toast.makeText(getApplicationContext(), "By Name", Toast.LENGTH_SHORT).show(); sortJsonTechnique="1"; if (myData) { sortByName(sortdata,sortJsonTechnique); } break; case 1: Toast.makeText(getApplicationContext(), "By Father Name", Toast.LENGTH_SHORT).show(); sortJsonTechnique="2"; if (myData) { sortByName(sortdata,sortJsonTechnique); } break; case 2: Toast.makeText(getApplicationContext(), "By EPIC", Toast.LENGTH_SHORT).show(); sortJsonTechnique="3"; if (myData) { sortByName(sortdata,sortJsonTechnique); } break; case 3: Toast.makeText(getApplicationContext(), "By House Number", Toast.LENGTH_SHORT).show(); sortJsonTechnique="4"; if (myData) { sortByName(sortdata,sortJsonTechnique); } break; default: break; } } }); builder.show(); }});And after selection made in fab button click i sort json array.Here is code for parse json array:
private void sortByName(String mysortJson,String sortType) { List<JSONObject> jsonObjects=new ArrayList<JSONObject>(); try { JSONObject object=new JSONObject(mysortJson); JSONArray jsonArray=object.getJSONArray("Data"); for (int i=0;i<jsonArray.length();i++) { jsonObjects.add(jsonArray.getJSONObject(i)); } if (sortType.equals("1")) { Collections.sort(jsonObjects, new Comparator<JSONObject>() { @Override public int compare(JSONObject a, JSONObject b) { String val1=new String(); String val2=new String(); try { val1=(String) a.get("Name");// Log.e("Value1",""+val1); val2=(String) b.get("Name");// Log.e("Value2",""+val2); } catch (JSONException e) { e.printStackTrace(); } return val1.compareTo(val2); } }); for (int j=0;j<jsonObjects.size();j++) { jsonArray.put(jsonObjects.get(j)); } voter_id=new String[jsonArray.length()]; boothname_id=new String[jsonArray.length()]; voter_name=new String[jsonArray.length()]; voter_f_m_h_name=new String[jsonArray.length()]; voter_epic=new String[jsonArray.length()]; voter_h_no=new String[jsonArray.length()]; voter_mobile=new String[jsonArray.length()]; voter_gender=new String[jsonArray.length()]; voter_age=new String[jsonArray.length()]; get_voter_dob=new String[jsonArray.length()]; get_marriage_anniv=new String[jsonArray.length()]; get_voter_caste_id=new String[jsonArray.length()]; get_voter_status_id=new String[jsonArray.length()]; get_voter_social_status_id=new String[jsonArray.length()]; for (int c=0;c<jsonArray.length();c++) { JSONObject fetchVoter = jsonArray.getJSONObject(c); voter_id[c] = fetchVoter.getString(KEY_VOTER_ID); boothname_id[c] = fetchVoter.getString(KEY_BOOTHNAME_ID); voter_name[c] = fetchVoter.getString(KEY_SEARCH_NAME); voter_f_m_h_name[c] = fetchVoter.getString(KEY_SEARCH_F_H_M_NAME); voter_epic[c] = fetchVoter.getString(KEY_SEARCH_EPIC_NAME); voter_h_no[c] = fetchVoter.getString(KEY_SEARCH_HOUSE_NUMBER); voter_mobile[c]=fetchVoter.getString(KEY_SEARCH_MOBILE); voter_gender[c]=fetchVoter.getString(KEY_SEARCH_GENDER); voter_age[c]=fetchVoter.getString(KEY_SEARCH_AGE); get_voter_dob[c]=fetchVoter.getString(KEY_SEARCH_DOB); get_marriage_anniv[c]=fetchVoter.getString(KEY_MARRIEGE_ANNIV); get_voter_caste_id[c]=fetchVoter.getString(KEY_GET_CASTE_ID); get_voter_status_id[c]=fetchVoter.getString(KEY_GET_STATUS_ID); get_voter_social_status_id[c]=fetchVoter.getString(KEY_GET_SOCIAL_STATUS); } CustomSearchList adapter=new CustomSearchList(this,ParseJsonData.voter_id,ParseJsonData.boothname_id,ParseJsonData.voter_name,ParseJsonData.voter_f_m_h_name,ParseJsonData.voter_epic,ParseJsonData.voter_h_no,ParseJsonData.voter_mobile,ParseJsonData.voter_age,ParseJsonData.voter_gender,ParseJsonData.get_marriage_anniv,ParseJsonData.get_voter_dob,ParseJsonData.get_voter_caste_id,ParseJsonData.get_voter_status_id,ParseJsonData.get_voter_social_status_id); searchlist.setAdapter(adapter); adapter.notifyDataSetChanged(); } else if (sortType.equals("2")) { Collections.sort(jsonObjects, new Comparator<JSONObject>() { @Override public int compare(JSONObject a, JSONObject b) { String val1=new String(); String val2=new String(); try { val1=(String) a.get("FName");// Log.e("Value1",""+val1); val2=(String) b.get("FName");// Log.e("Value2",""+val2); } catch (JSONException e) { e.printStackTrace(); } return val1.compareTo(val2); } }); for (int j=0;j<jsonObjects.size();j++) { jsonArray.put(jsonObjects.get(j)); } voter_id=new String[jsonArray.length()]; boothname_id=new String[jsonArray.length()]; voter_name=new String[jsonArray.length()]; voter_f_m_h_name=new String[jsonArray.length()]; voter_epic=new String[jsonArray.length()]; voter_h_no=new String[jsonArray.length()]; voter_mobile=new String[jsonArray.length()]; voter_gender=new String[jsonArray.length()]; voter_age=new String[jsonArray.length()]; get_voter_dob=new String[jsonArray.length()]; get_marriage_anniv=new String[jsonArray.length()]; get_voter_caste_id=new String[jsonArray.length()]; get_voter_status_id=new String[jsonArray.length()]; get_voter_social_status_id=new String[jsonArray.length()]; for (int c=0;c<jsonArray.length();c++) { JSONObject fetchVoter = jsonArray.getJSONObject(c); voter_id[c] = fetchVoter.getString(KEY_VOTER_ID); boothname_id[c] = fetchVoter.getString(KEY_BOOTHNAME_ID); voter_name[c] = fetchVoter.getString(KEY_SEARCH_NAME); voter_f_m_h_name[c] = fetchVoter.getString(KEY_SEARCH_F_H_M_NAME); voter_epic[c] = fetchVoter.getString(KEY_SEARCH_EPIC_NAME); voter_h_no[c] = fetchVoter.getString(KEY_SEARCH_HOUSE_NUMBER); voter_mobile[c]=fetchVoter.getString(KEY_SEARCH_MOBILE); voter_gender[c]=fetchVoter.getString(KEY_SEARCH_GENDER); voter_age[c]=fetchVoter.getString(KEY_SEARCH_AGE); get_voter_dob[c]=fetchVoter.getString(KEY_SEARCH_DOB); get_marriage_anniv[c]=fetchVoter.getString(KEY_MARRIEGE_ANNIV); get_voter_caste_id[c]=fetchVoter.getString(KEY_GET_CASTE_ID); get_voter_status_id[c]=fetchVoter.getString(KEY_GET_STATUS_ID); get_voter_social_status_id[c]=fetchVoter.getString(KEY_GET_SOCIAL_STATUS); } CustomSearchList adapter=new CustomSearchList(this,ParseJsonData.voter_id,ParseJsonData.boothname_id,ParseJsonData.voter_name,ParseJsonData.voter_f_m_h_name,ParseJsonData.voter_epic,ParseJsonData.voter_h_no,ParseJsonData.voter_mobile,ParseJsonData.voter_age,ParseJsonData.voter_gender,ParseJsonData.get_marriage_anniv,ParseJsonData.get_voter_dob,ParseJsonData.get_voter_caste_id,ParseJsonData.get_voter_status_id,ParseJsonData.get_voter_social_status_id); searchlist.setAdapter(adapter); adapter.notifyDataSetChanged(); } else if (sortType.equals("3")) { Collections.sort(jsonObjects, new Comparator<JSONObject>() { @Override public int compare(JSONObject a, JSONObject b) { String val1=new String(); String val2=new String(); try { val1=(String) a.get("EPIC");// Log.e("Value1",""+val1); val2=(String) b.get("EPIC");// Log.e("Value2",""+val2); } catch (JSONException e) { e.printStackTrace(); } return val1.compareTo(val2); } }); for (int j=0;j<jsonObjects.size();j++) { jsonArray.put(jsonObjects.get(j)); } voter_id=new String[jsonArray.length()]; boothname_id=new String[jsonArray.length()]; voter_name=new String[jsonArray.length()]; voter_f_m_h_name=new String[jsonArray.length()]; voter_epic=new String[jsonArray.length()]; voter_h_no=new String[jsonArray.length()]; voter_mobile=new String[jsonArray.length()]; voter_gender=new String[jsonArray.length()]; voter_age=new String[jsonArray.length()]; get_voter_dob=new String[jsonArray.length()]; get_marriage_anniv=new String[jsonArray.length()]; get_voter_caste_id=new String[jsonArray.length()]; get_voter_status_id=new String[jsonArray.length()]; get_voter_social_status_id=new String[jsonArray.length()]; for (int c=0;c<jsonArray.length();c++) { JSONObject fetchVoter = jsonArray.getJSONObject(c); voter_id[c] = fetchVoter.getString(KEY_VOTER_ID); boothname_id[c] = fetchVoter.getString(KEY_BOOTHNAME_ID); voter_name[c] = fetchVoter.getString(KEY_SEARCH_NAME); voter_f_m_h_name[c] = fetchVoter.getString(KEY_SEARCH_F_H_M_NAME); voter_epic[c] = fetchVoter.getString(KEY_SEARCH_EPIC_NAME); voter_h_no[c] = fetchVoter.getString(KEY_SEARCH_HOUSE_NUMBER); voter_mobile[c]=fetchVoter.getString(KEY_SEARCH_MOBILE); voter_gender[c]=fetchVoter.getString(KEY_SEARCH_GENDER); voter_age[c]=fetchVoter.getString(KEY_SEARCH_AGE); get_voter_dob[c]=fetchVoter.getString(KEY_SEARCH_DOB); get_marriage_anniv[c]=fetchVoter.getString(KEY_MARRIEGE_ANNIV); get_voter_caste_id[c]=fetchVoter.getString(KEY_GET_CASTE_ID); get_voter_status_id[c]=fetchVoter.getString(KEY_GET_STATUS_ID); get_voter_social_status_id[c]=fetchVoter.getString(KEY_GET_SOCIAL_STATUS); } CustomSearchList adapter=new CustomSearchList(this,ParseJsonData.voter_id,ParseJsonData.boothname_id,ParseJsonData.voter_name,ParseJsonData.voter_f_m_h_name,ParseJsonData.voter_epic,ParseJsonData.voter_h_no,ParseJsonData.voter_mobile,ParseJsonData.voter_age,ParseJsonData.voter_gender,ParseJsonData.get_marriage_anniv,ParseJsonData.get_voter_dob,ParseJsonData.get_voter_caste_id,ParseJsonData.get_voter_status_id,ParseJsonData.get_voter_social_status_id); searchlist.setAdapter(adapter); adapter.notifyDataSetChanged(); } else if (sortType.equals(4)) { Collections.sort(jsonObjects, new Comparator<JSONObject>() { @Override public int compare(JSONObject a, JSONObject b) { String val1=new String(); String val2=new String(); try { val1=(String) a.get("HouseNo");// Log.e("Value1",""+val1); val2=(String) b.get("HouseNo");// Log.e("Value2",""+val2); } catch (JSONException e) { e.printStackTrace(); } return val1.compareTo(val2); } }); for (int j=0;j<jsonObjects.size();j++) { jsonArray.put(jsonObjects.get(j)); } voter_id=new String[jsonArray.length()]; boothname_id=new String[jsonArray.length()]; voter_name=new String[jsonArray.length()]; voter_f_m_h_name=new String[jsonArray.length()]; voter_epic=new String[jsonArray.length()]; voter_h_no=new String[jsonArray.length()]; voter_mobile=new String[jsonArray.length()]; voter_gender=new String[jsonArray.length()]; voter_age=new String[jsonArray.length()]; get_voter_dob=new String[jsonArray.length()]; get_marriage_anniv=new String[jsonArray.length()]; get_voter_caste_id=new String[jsonArray.length()]; get_voter_status_id=new String[jsonArray.length()]; get_voter_social_status_id=new String[jsonArray.length()]; for (int c=0;c<jsonArray.length();c++) { JSONObject fetchVoter = jsonArray.getJSONObject(c); voter_id[c] = fetchVoter.getString(KEY_VOTER_ID); boothname_id[c] = fetchVoter.getString(KEY_BOOTHNAME_ID); voter_name[c] = fetchVoter.getString(KEY_SEARCH_NAME); voter_f_m_h_name[c] = fetchVoter.getString(KEY_SEARCH_F_H_M_NAME); voter_epic[c] = fetchVoter.getString(KEY_SEARCH_EPIC_NAME); voter_h_no[c] = fetchVoter.getString(KEY_SEARCH_HOUSE_NUMBER); voter_mobile[c]=fetchVoter.getString(KEY_SEARCH_MOBILE); voter_gender[c]=fetchVoter.getString(KEY_SEARCH_GENDER); voter_age[c]=fetchVoter.getString(KEY_SEARCH_AGE); get_voter_dob[c]=fetchVoter.getString(KEY_SEARCH_DOB); get_marriage_anniv[c]=fetchVoter.getString(KEY_MARRIEGE_ANNIV); get_voter_caste_id[c]=fetchVoter.getString(KEY_GET_CASTE_ID); get_voter_status_id[c]=fetchVoter.getString(KEY_GET_STATUS_ID); get_voter_social_status_id[c]=fetchVoter.getString(KEY_GET_SOCIAL_STATUS); } CustomSearchList adapter=new CustomSearchList(this,ParseJsonData.voter_id,ParseJsonData.boothname_id,ParseJsonData.voter_name,ParseJsonData.voter_f_m_h_name,ParseJsonData.voter_epic,ParseJsonData.voter_h_no,ParseJsonData.voter_mobile,ParseJsonData.voter_age,ParseJsonData.voter_gender,ParseJsonData.get_marriage_anniv,ParseJsonData.get_voter_dob,ParseJsonData.get_voter_caste_id,ParseJsonData.get_voter_status_id,ParseJsonData.get_voter_social_status_id); searchlist.setAdapter(adapter); adapter.notifyDataSetChanged(); }// Log.e("Length Array",""+jsonArray.length());// Log.e("Length List",""+jsonObjects.size()); } catch (JSONException e) { e.printStackTrace(); } }I use `adapter.notifyDataSetChanged(); but my custom list not affect the sort.Please suggest me what to do.