How to show second spinner data based on first spinner. Json is coming from url? Ask Question

manpreet Best Answer 2 years ago

Till now I am getting JSON and putting them in 3 different spinners. But the problem is that how to make 2nd spinner data based on the 1st spinner and 3rd spinner data based on the 2nd spinner.

       This is my code for JSON.

            try {
            // Locate the NodeList name
            jsonarray = jsonobject.getJSONArray("results");
            for (int i = 0; i < jsonarray.length(); i++) {
                jsonobject = jsonarray.getJSONObject(i);

                Results worldpop = new Results();

                worldpop.setSyllabus(jsonobject.optString("syllabus"));
                worldpop.setGrade(jsonobject.optString("grade"));
                worldpop.setSubject(jsonobject.optString("subject"));
                //worldpop.setFlag(jsonobject.optString("flag"));
                world.add(worldpop);


                worldlist.add(jsonobject.optString("syllabus"));
                worldlist2.add(jsonobject.optString("grade"));
                worldlist3.add(jsonobject.optString("subject"));

            }
        } catch (Exception e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void args) {
        // Locate the spinner in activity_main.xml

        final Spinner mySpinner = (Spinner) findViewById(R.id.syllabus);
        Spinner mySpinner2 = (Spinner) findViewById(R.id.grade);
        Spinner mySpinner3 = (Spinner) findViewById(R.id.subject);

        // Spinner adapter


        LinkedHashSet<String> listToSet = new LinkedHashSet<String>(worldlist);

        //Creating Arraylist without duplicate values
        final List<String> worldlistnew = new ArrayList<String>(listToSet);




     mySpinner
                .setAdapter(new ArrayAdapter<
                                                

                                                                                                        
                                                    
                                                
                                                

                                                    

                                                        
                                                            0
                                                            views 

                                                            0
                                                                likes 
                                                            
                                                            

                                                            0
                                                            shares
                                                            


    

         Facebook
        
         Twitter
        
        
         Linked In 
        
          WhatsApp