Eu tenho uma exibição de lista que eu preencho de uma matriz JSON. Primeiro, os valores são extraídos da matriz JSON e, em seguida, colocados em um HashMap. Em seguida, este HashMap é adicionado a um ArrayList. A partir daqui, os dados necessários são adicionados a um ListAdapter.

Pesquisei on-line por dias agora, para encontrar uma maneira de adicionar uma função de pesquisa a isso, mas nenhum deles usa essa combinação de ListAdapater, ArrayList e HashMap. Como sou iniciante, alguém pode me ajudar a fazer isso, por favor?

Este é o meu código

public class ListNew extends Activity {
ListView list;
TextView eid;
TextView ename; 
TextView edesc;
//Button Btngetdata;
ArrayList<HashMap<String, String>> oslist = new ArrayList<HashMap<String, String>>();

//URL to get JSON Array
private static String url = "somelink";

//JSON Node Names 
private static final String TAG_OS = "events";
private static final String TAG_EID = "eid";
private static final String TAG_ENAME = "ename";
private static final String TAG_ETYPE = "etype";
private static final String TAG_EDESC = "edesc";
private static final String TAG_ESDATE = "esdate";
private static final String TAG_EEDATE = "eedate";
private static final String TAG_ESTIME = "estime";
private static final String TAG_EETIME = "eetime";
private static final String TAG_LOCATION = "location";
private static final String TAG_CREATED_AT = "created_at";
private static final String TAG_EDITED_AT = "edited_at";
private static final String TAG_CREATEDBY = "createdby";
private static final String TAG_IMAGE = "image";
private static final String TAG_APPROVED = "approved";

EditText inputSearch;
ListAdapter adapter;


public static final String TABLE_EVENT = "event";



JSONArray events = null;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //from here
    inputSearch = (EditText) findViewById(R.id.etSearch);

    setContentView(R.layout.listnew);
    oslist = new ArrayList<HashMap<String, String>>();

    new JSONParse().execute();


}

private class JSONParse extends AsyncTask<String, String, JSONObject> {
     private ProgressDialog pDialog;
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
         eid = (TextView)findViewById(R.id.vers);
         ename = (TextView)findViewById(R.id.name);
         edesc = (TextView)findViewById(R.id.api);
        pDialog = new ProgressDialog(ListNew.this);
        pDialog.setMessage("Getting Data ...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();



    }

    @Override
    protected JSONObject doInBackground(String... args) {

        JSONParser jParser = new JSONParser();

        // Getting JSON from URL
        JSONObject json = jParser.getJSONFromUrl2(url);
        return json;
    }
     @Override
     protected void onPostExecute(JSONObject json) {
         pDialog.dismiss();
         try {
                // Getting JSON Array from URL
                events = json.getJSONArray(TAG_OS);
                for(int i = 0; i < events.length(); i++){
                JSONObject c = events.getJSONObject(i);

                // Storing  JSON item in a Variable
                String eid = c.getString(TAG_EID);
                String ename = c.getString(TAG_ENAME);
                String etype = c.getString(TAG_ETYPE);
                String edesc = c.getString(TAG_EDESC);
                String esdate = c.getString(TAG_ESDATE);
                String eedate = c.getString(TAG_EEDATE);
                String estime = c.getString(TAG_ESTIME);
                String eetime = c.getString(TAG_EETIME);
                String location = c.getString(TAG_LOCATION);
                String created_at = c.getString(TAG_CREATED_AT);
                String edited_at = c.getString(TAG_EDITED_AT);
                String createdby = c.getString(TAG_CREATEDBY);
                String image = c.getString(TAG_IMAGE);
                String approved = c.getString(TAG_APPROVED);

                HashMap<String, String> map = new HashMap<String, String>();

                map.put(TAG_EID, eid);
                map.put(TAG_ENAME, ename);
                map.put(TAG_ETYPE, etype);
                map.put(TAG_EDESC, edesc);
                map.put(TAG_ESDATE, esdate);
                map.put(TAG_EEDATE, eedate);
                map.put(TAG_ESTIME, estime);
                map.put(TAG_EETIME, eetime);
                map.put(TAG_LOCATION, location);
                map.put(TAG_CREATED_AT, created_at);
                map.put(TAG_EDITED_AT, edited_at);
                map.put(TAG_CREATEDBY, createdby);
                map.put(TAG_IMAGE, image);
                map.put(TAG_APPROVED, approved);


                oslist.add(map);
                list=(ListView)findViewById(R.id.list);
                TextView emptyText = (TextView)findViewById(R.id.empty);
                list.setEmptyView(emptyText);

                //Log.d("TAG_is d first one", TAG_APPROVED + "," + approved);



                adapter = new SimpleAdapter(ListNew.this, oslist,
                        R.layout.list_v,
                        new String[] { TAG_ENAME,TAG_CREATEDBY, TAG_CREATED_AT }, new int[] {
                                R.id.vers,R.id.name, R.id.api});


                list.setAdapter(adapter);

                list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                                            int position, long id) {
                        Intent i = new Intent(ListNew.this, NewEvent.class);
                        i.putExtra("eid", oslist.get(+position).get("eid") ); 
                        i.putExtra("ename", oslist.get(+position).get("ename") );
                        i.putExtra("etype", oslist.get(+position).get("etype") );
                        i.putExtra("edesc", oslist.get(+position).get("edesc") );
                        i.putExtra("esdate", oslist.get(+position).get("esdate") );
                        i.putExtra("eedate", oslist.get(+position).get("eedate") );
                        i.putExtra("estime", oslist.get(+position).get("estime") );
                        i.putExtra("eetime", oslist.get(+position).get("eetime") );
                        i.putExtra("location", oslist.get(+position).get("location") );
                        i.putExtra("created_at", oslist.get(+position).get("created_at") );
                        i.putExtra("edited_at", oslist.get(+position).get("edited_at") );
                        i.putExtra("createdby", oslist.get(+position).get("createdby") );
                        i.putExtra("image",  byteArray);
                        i.putExtra("approved", oslist.get(+position).get("approved") );
                        startActivity(i);

                    }
                });


            }//end if
        } catch (JSONException e) {
            e.printStackTrace();
        }




     }


}

}