Getting value and its particular key on spinner click

Question

I am getting the data in both the spinner1 and spinner 2 when spinner1 is selected then its corresponding data is automatically populated in spinner2

Below is the XML format data getting from URL then-

<a:Pair>
<a:FromID>01</a:FromID>      <---This should Toast---->
<a:FromName>INDIA</a:FromName><---On selecting this from spinner------->
<a:ToID>40</a:ToID>
<a:ToName>TURKEY</a:ToName>
</a:Pair>

<a:Pair>
<a:FromID>10</a:FromID>
<a:FromName>USA</a:FromName>
<a:ToID>01</a:ToID>
<a:ToName>INDIA</a:ToName>
</a:Pair>

<a:Pair>
<a:FromID>19</a:FromID>
<a:FromName>CHINA</a:FromName>
<a:ToID>10</a:ToID>
<a:ToName>USA</a:ToName>
</a:Pair>

<a:Pair>
<a:FromID>40</a:FromID>
<a:FromName>TURKEY</a:FromName>
<a:ToID>01</a:ToID>
<a:ToName>INDIA</a:ToName>
</a:Pair>

</Result>
</Response>

But the thing is if spinner1 data is USA selected then I want to toast its corresponding id ie 10 ...which i will use in future to pass to next activity also

My below code works fine I just want when spinner1 is selected its id from XML data is selected and if spinner2 then also its corresponding id should toast.

MainActivity.java

public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener, OnClickListener {

    ArrayList<String> title;
    ArrayList<String> title2;
    Button button;
    Spinner spinner;
    Spinner spinner2;
    private EditText fromDateEtxt;
    //private EditText toDateEtxt;

    private DatePickerDialog fromDatePickerDialog;
    //private DatePickerDialog toDatePickerDialog;

    private SimpleDateFormat dateFormatter;

    ArrayAdapter<String> from_adapter;
    ArrayAdapter<String> from_adapter2;
    Map<String, List<String>> values = new HashMap<String, List<String>>();
    @TargetApi(Build.VERSION_CODES.GINGERBREAD)
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        title = new ArrayList<String>();
        title2 = new ArrayList<String>();

        button = (Button) findViewById(R.id.button1);
        spinner = (Spinner) findViewById(R.id.spinner1);
        spinner.setOnItemSelectedListener(this);

        spinner2 = (Spinner) findViewById(R.id.spinner2);
        //spinner2.setOnItemSelectedListener(this);
        dateFormatter = new SimpleDateFormat("dd-MM-yyyy", Locale.US);
        findViewsById();

        setDateTimeField();
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }


        button.setOnClickListener(new OnClickListener()
        {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                parse();

                from_adapter=new ArrayAdapter<String>(getBaseContext(),android.R.layout.simple_spinner_item, title);
                from_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                title2.clear();
                from_adapter2=new ArrayAdapter<String>(getBaseContext(),android.R.layout.simple_spinner_item, title2);
                from_adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);


                spinner.setAdapter(from_adapter);
                //from_adapter2.clear();
                //from_adapter2.notifyDataSetChanged();
                spinner2.setAdapter(from_adapter2);


            }

            private Object from_adapter(int i) {
                // TODO Auto-generated method stub
                return null;
            }

        });


    }
    public void onItemSelected(AdapterView<?> parent, View view, int pos,
            long id) {
        String lang_Name = parent.getItemAtPosition(pos).toString();
        List<String> lang_Key = values.get(lang_Name);
        from_adapter2.clear();
            for(String s : lang_Key){
                  from_adapter2.insert(s, from_adapter2.getCount());
            }
            from_adapter2.notifyDataSetChanged();
        Toast.makeText(parent.getContext(), ""+lang_Key,
                Toast.LENGTH_LONG).show();
    }

    public void onNothingSelected(AdapterView<?> arg0) {
    }

    protected void parse() {
        // TODO Auto-generated method stub


        try {

            URL url = new URL(
                    "www.example.com");
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(new InputSource(url.openStream()));
            doc.getDocumentElement().normalize();

            NodeList nodeList = doc.getElementsByTagName("a:Pair");
            for (int i = 0; i < nodeList.getLength(); i++) {
                Element el = (Element) nodeList.item(i);
                // get the a:W value
                String awValue = el.getElementsByTagName("a:FromName").item(0).getTextContent();
                // add the above value in our map  as key if it isn't present in the map, this key will 
                // have a list associated with it in which ALL the values for a:R will be stored, if 
                // the awValue key is present then you just add the new a:R value to its list 
                if (!values.containsKey(awValue)) {
                    values.put(awValue, new ArrayList<String>());

                }
                // also add the value pointed by a:R to the list associated with a:W
                String arValue = el.getElementsByTagName("a:ToName").item(0).getTextContent();
                values.get(awValue).add(arValue);

               // Log.d("ADebugTag", "Value: " + arValue);
            }
             Log.d("ADebugTag", "Value: " +  values);
            for (int i = 0; i < nodeList.getLength(); i++) {

                Node node = nodeList.item(i);       

                Element fstElmnt = (Element) node;
                NodeList nameList = fstElmnt.getElementsByTagName("a:FromName");
                Element nameElement = (Element) nameList.item(0);
                nameList = nameElement.getChildNodes();         

                NodeList websiteList = fstElmnt.getElementsByTagName("a:ToName");
                Element websiteElement = (Element) websiteList.item(0);
                websiteList = websiteElement.getChildNodes();

                title.add(((Node) nameList.item(0)).getNodeValue());

            }
            NodeList nodeList2 = doc.getElementsByTagName("a:Pair");
            for (int i = 0; i < nodeList2.getLength(); i++) {

                Node node = nodeList2.item(i);       

                Element fstElmnt = (Element) node;
                NodeList nameList = fstElmnt.getElementsByTagName("a:ToName");
                Element nameElement = (Element) nameList.item(0);
                nameList = nameElement.getChildNodes();         
                title2.add(((Node) nameList.item(0)).getNodeValue());

            }
            Set<String> set = new LinkedHashSet<String>(title);
            title = new ArrayList<String>(set);
            // Collection<String> set = new LinkedHashSet<String>(months);
            Set<String> set2 = new LinkedHashSet<String>(title2);
            title2 = new ArrayList<String>(set2);
            System.out.println("list are");
            System.out.println(set);
            System.out.println("list 2 are");
            System.out.println(set2);
        } catch (Exception e) {
            System.out.println("XML Pasing Excpetion = " + e);
        }

    }

    @Override
    public void onClick(View view) {
        if(view == fromDateEtxt) {
            fromDatePickerDialog.show();
        } else  {
            Log.d("errorrrr", "soryy");
        }

    }
}

I am not able to pass the id to the corresponding data which are populated in the spinner and toast that id

Answer 1

You can create separate action on each spinner like this

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                     // Show your toast for Spinner 1
                    from_adapter2.notifyDataSetChanged();// Changed
               }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                     // Show your toast for Spinner 2
               }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });