How i will use Search in customized List VIew

Question

I am taking too much time on customized search.
Can anyone tell me , How I will implement it in my code.Plz help I already get a data in list, I have edit box , but I do'nt know, How it will implement in Using Filterable class or how I will use addTextChangedListener(){} in this code.

  editTxt.addTextChangedListener(new TextWatcher() {

     @Override
     public void onTextChanged(CharSequence s, int start, int before, int count) {

     }

     @Override
     public void beforeTextChanged(CharSequence s, int start, int count,
             int after) {

     }

     @Override
     public void afterTextChanged(Editable s) {
     }
 });

My code is MainSearch.java ,Where I will get list .

In this call , where I will implement the search code .. I have little bit idea , If I will save all list items in arrayList and will compare all those value with editText value. It may be provide the solutions. Not sure about it.

public class MainSEarch extends Activity {

    // Progress Dialog
        private ProgressDialog pDialog;
    ListView list;
    LazyAdapter adapter;

    // Connection detector
        ConnectionDetector cd;

        // Alert dialog manager
        AlertDialogManager alert = new AlertDialogManager();



        ArrayList<HashMap<String, String>> contactList;
    // Search EditText
   EditText inputSearch;
   int textlength = 0;




    // url to make request
    String url = "URl NOT HERE But like  as  http://api.androidhive.info/contacts/"; 


    // JSON Node names
        static final String TAG_CONTACTS = "userinfo";
         static final String TAG_ID = "id";
          static final String TAG_NAME = "name";
          static final String TAG_EMAIL = "email";
          static final String TAG_PHONE = "cb_phonenumber";

    // contacts JSONArray
    JSONArray userinfo = null;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_search);
        inputSearch = (EditText) findViewById(R.id.editText1); // Search Box

        cd = new ConnectionDetector(getApplicationContext());

       // Check for internet connection
       if (!cd.isConnectingToInternet()) {
           // Internet Connection is not present
           alert.showAlertDialog(MainSEarch.this, "Internet Connection Error",
                   "Please connect to working Internet connection", false);
           // stop executing code by return
           return;
       }



        // Hashmap for ListView
         contactList = new ArrayList<HashMap<String, String>>();


        // Loading Agents list JSON in Background Thread
                new LoadAgentList().execute();


                inputSearch.addTextChangedListener(new TextWatcher() {

                    @Override
                    public void onTextChanged(CharSequence s, int start, int before, int count) {
            //what should I do in this method.plz provide some solutions.           

                        }

                    @Override
                    public void beforeTextChanged(CharSequence s, int start, int count,
                            int after) {

                    }

                    @Override
                    public void afterTextChanged(Editable s) {
                    }
                });     

    }



    /**
     * Background Async Task to Load all Albums by making http request
     * */
    class LoadAgentList extends AsyncTask<String, String, String> 
    {


    /** *
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(MainSEarch.this);
            pDialog.setMessage("Agents List ...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected String doInBackground(String... params) {
            // TODO Auto-generated method stub



            // Creating JSON Parser instance
                    JSONParser jParser = new JSONParser();

                    // getting JSON string from URL
                    JSONObject json = jParser.getJSONFromUrl(url);

                    try{

                        // Getting Array of Contacts
                        userinfo = json.getJSONArray(TAG_CONTACTS);

                        // looping through All Contacts
                        for(int i = 0; i < userinfo.length(); i++){
                            JSONObject c = userinfo.getJSONObject(i);

                            // Storing each json item in variable
                            String id = c.getString(TAG_ID);
                            String name = c.getString(TAG_NAME);
                            String email = c.getString(TAG_EMAIL);
                            String mobile = c.getString(TAG_PHONE);




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

                            // adding each child node to HashMap key => value
                            map.put(TAG_ID, id);
                            map.put(TAG_NAME, name);
                            map.put(TAG_EMAIL, email);
                            map.put(TAG_PHONE, mobile);

                            // adding HashList to ArrayList
                            contactList.add(map);
                        }
                    }
                        catch (JSONException e) {
                            e.printStackTrace();
                        }

            return null;
        }



            @Override
            protected void onPostExecute(String file_url) {
                // dismiss the dialog after getting all albums
                pDialog.dismiss();
                // updating UI from Background Thread
                runOnUiThread(new Runnable() {
                    public void run() {


                        list=(ListView)findViewById(R.id.mylist);

                        // Getting adapter by passing xml data ArrayList
                        adapter=new LazyAdapter(MainSEarch.this,contactList);      
                        list.setAdapter(adapter);
                    }
                });

            }

    }

My Second Class is LazyAdapter: Which will show how getView() method inflate the view and how lazy list will work code is what shold I do in this class

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private static LayoutInflater inflater=null;

    public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
        activity = a;
        data=d;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }


    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return data.size();
    }

    @Override
    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
         View vi=convertView;
            if(convertView==null)
                vi = inflater.inflate(R.layout.list_item, null);

            TextView name = (TextView)vi.findViewById(R.id.name); // name
            TextView email = (TextView)vi.findViewById(R.id.email); //  email
            TextView phone = (TextView)vi.findViewById(R.id.mobile); // phone


            HashMap<String, String> song = new HashMap<String, String>();
            song = data.get(position);

            // Setting all values in listview
            name.setText(song.get(MainSEarch.TAG_NAME));
            email.setText(song.get(MainSEarch.TAG_EMAIL));
            phone.setText(song.get(MainSEarch.TAG_PHONE));




        return vi;
    }




}

What change should be there in my code , that my search will be execute . Plz I am beginner in Android. Thanks in Advance

Answer 1

I have used the following code to filter data from my customized list view. have a look at it, an dcheck if you can implement it in your case,

adapter = new CustomListViewAdapter(this,R.layout.list_row, rowItems);
listView.setAdapter(adapter);
listView.setTextFilterEnabled(true);

and for filtering search based on the edit text, I have used,

editText.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {

            }

            public void beforeTextChanged(CharSequence arg0, int arg1,
                    int arg2, int arg3) {

            }

            public void afterTextChanged(Editable arg0) {
                ActivityName.this.adapter.getFilter().filter(arg0);

            }
        });

Answer 2

You'll have to implement your own filter in your custom adapter, here it goes a sample(is very straightforward):

public Filter getFilter() {
        Log.d("Filter", "BeginFilter");
        return new Filter() {
                @SuppressWarnings("unchecked")
                @Override
                protected void publishResults(CharSequence arg0, FilterResults arg1) {
                    Log.d("Filter", "publishResults");
                    mGuides = (ArrayList<Guide>)arg1.values;
                    notifyDataSetChanged();
                }

                @Override
                protected FilterResults performFiltering(CharSequence constraint) {
                    Log.d("Filter","Perform filtering");

                    constraint = constraint.toString().toLowerCase();

                    ArrayList<Guide> filteredGuides = new ArrayList<Guide>();

                    for (int i = 0; i < mGuides.size(); i++)
                    {
                        Guide newGuide = mGuides.get(i);
                        if (newGuide.getName().toLowerCase().contains(constraint))
                            filteredGuides.add(newGuide);
                    }

                    FilterResults filterResults = new FilterResults();
                    filterResults.count = filteredGuides.size();
                    filterResults.values = filteredGuides;
                    return filterResults;
                }
            };
    }

You call it like this from the activity:

public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                adapter.getFilter().filter(arg0);
            }

Answer 3

Look at this example. Hope you will get an idea. Use Textwatcher. http://abdennour-insat.blogspot.in/2012/05/listview-textwatcher-autocomplete.html