How to edit previous listView instead of add a new one?

[John Joe]

I have one icon button and one listView in Activity A.

Icon button-----> intent to B, return value to A, add to new list

ListView click--> intent to B, return changed value back to listView

I use mClickedPosition=-1; to verify whether icon is clicked or listView,but it still add to new list even the listView is clicked.

Activity A

          @Override
            public boolean onOptionsItemSelected(MenuItem item) {
                 switch (item.getItemId()) {
                    case R.id.addDetails:
                        mClickedPosition=-1; // if icon is clicked
                        View menuItemView = findViewById(R.id.addDetails);
                        PopupMenu po = new PopupMenu(this, menuItemView); //for drop-down menu
                        po.getMenuInflater().inflate(R.menu.popup_details, po.getMenu());
                        po.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                        public boolean onMenuItemClick(MenuItem item) {
                        Toast.makeText(getApplication(), "You Clicked : " + item.getTitle(), Toast.LENGTH_SHORT).show();
                        if ("Add Work Details".equals(item.getTitle())) 
                        {
                           Intent intent = new Intent(getApplication(), B.class);  // go to Activity B
                           startActivityForResult(intent, PROJECT_REQUEST_CODE);
                         }
                        else
                         {
                            //Change previous list
                          }
                            return true;
                          }
                            });
                         po.show(); //showing popup menu
                    }
                    return super.onOptionsItemSelected(item);
            
                }
    
       listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { // if listView is clicked
                @Override
                public void onItemClick(AdapterView<?> a, View v, int position, long id) {
                    Object o = listview.getItemAtPosition(position);
                    SearchResults fullObject = (SearchResults) o;
                    String temp = fullObject.getDescription();
                    String Project=fullObject.getProject();
                    String [] ReceiveProject=Project.split(":");
                    String[] ReceiveDescription = temp.split(":");
                    Intent i = new Intent(getApplication(), B.class);
                    i.putExtra("ReceiveProject", ReceiveProject[1].trim());
                    i.putExtra("ReceiveDescription", ReceiveDescription[1]);
                    startActivityForResult(i,PROJECT_REQUEST_CODE);
                }
            });
        }
    
    
    
        @Override
        public void onActivityResult(int requestCode, int resultCode, Intent data) { // receive from Activity B and populate ListView A
                ReceiveProject = data.getStringExtra("Project");
                ReceiveDescription = data.getStringExtra("Description");
                if(mClickedPosition==-1) {  // if icon clicked
                    MyCustomBaseAdapter objMyCustomBaseAdapter = (MyCustomBaseAdapter) listview.getAdapter();
                    objMyCustomBaseAdapter.addNewItem(ReceiveProject, ReceiveDescription, ReceiveProgress, ReceiveTimeIn, ReceiveTimeOut); // add list
                }
                else
                {
                    // change the current list
                }
    
            }

MyCustomBaseAdapter

  public class MyCustomBaseAdapter extends BaseAdapter{   // for ListView in Activity A
    
    
            private static ArrayList<SearchResults> searchArrayList;
    
            private LayoutInflater mInflater;
    
            public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results) {
                searchArrayList = results;
                mInflater = LayoutInflater.from(context);
            }
    
            public int getCount() {
                return searchArrayList.size();
            }
    
    
    
            public Object getItem(int position) {
                return searchArrayList.get(position);
            }
    
            public long getItemId(int position) {
                return position;
            }
    
           public void addNewItem(String P,String D,int Per,String I,String O)
          {
            SearchResults obj=new SearchResults();
            obj.setProject(" Project/Service/Training : "+P);
            obj.setDescription(" Work Description : " + D);
            searchArrayList.add(obj);
            this. notifyDataSetChanged();
        }
    
    
    
            public View getView(int position, View convertView, ViewGroup parent) {
                ViewHolder holder;
                if (convertView == null) {
                    convertView = mInflater.inflate(R.layout.custom_row_view, null);
                    holder = new ViewHolder();
                    holder.txtProject= (TextView) convertView.findViewById(R.id.ListProject);
                    holder.txtDescription = (TextView) convertView.findViewById(R.id.ListDescription);
                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }
    
                holder.txtProject.setText(searchArrayList.get(position).getProject());
                holder.txtDescription.setText(searchArrayList.get(position).getDescription());
                return convertView;
            }
    
            static class ViewHolder {
                TextView txtProject;
                TextView txtDescription;
               
            }
        }