autocomplete in android not working with dynamic data

Question

I am facing problem with auto complete in android. Instead of hard coding data in Activity itself, I tried to read the data dynamically from other application on every key p

Answer 1

I don't know what JSON you are using to parse. But here is an example of dynamic auto complete using Wikipedia Suggest JSON. All you need to do is change the JSON Part.

package com.yourapplication.wiki;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class WikiSuggestActivity extends Activity {
    public String data;
    public List<String> suggest;
    public AutoCompleteTextView autoComplete;
    public ArrayAdapter<String> aAdapter;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        suggest = new ArrayList<String>();
        autoComplete = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
        autoComplete.addTextChangedListener(new TextWatcher(){

            public void afterTextChanged(Editable editable) {
                // TODO Auto-generated method stub

            }

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // TODO Auto-generated method stub

            }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                String newText = s.toString();
                new getJson().execute(newText);
            }

        });

    }
   class getJson extends AsyncTask<String,String,String>{

    @Override
    protected String doInBackground(String... key) {
        String newText = key[0];
        newText = newText.trim();
        newText = newText.replace(" ", "+");
        try{
            HttpClient hClient = new DefaultHttpClient();
            HttpGet hGet = new HttpGet("http://en.wikipedia.org/w/api.php?action=opensearch&search="+newText+"&limit=8&namespace=0&format=json");
            ResponseHandler<String> rHandler = new BasicResponseHandler();
            data = hClient.execute(hGet,rHandler);
            suggest = new ArrayList<String>();
            JSONArray jArray = new JSONArray(data);
            for(int i=0;i<jArray.getJSONArray(1).length();i++){
            String SuggestKey = jArray.getJSONArray(1).getString(i);
            suggest.add(SuggestKey);
            }

        }catch(Exception e){
            Log.w("Error", e.getMessage());
        }
        runOnUiThread(new Runnable(){
            public void run(){
                 aAdapter = new ArrayAdapter<String>(getApplicationContext(),R.layout.item,suggest);
                 autoComplete.setAdapter(aAdapter);
                 aAdapter.notifyDataSetChanged();
            }
        });

        return null;
    }

   }
}

Hope it helps Thank You!.

Answer 2

You can use the Filter interface to implement this as well. Turns out Filter.performFiltering() is called off the UI thread just for this type of purpose. Here is some code I use to do this:

 Filter filter = new Filter() {

    @Override
    public CharSequence convertResultToString(Object resultValue) {
        return resultValue.toString();
    }

    @Override
    protected FilterResults performFiltering(CharSequence charSequence) {
        if( charSequence == null ) return null;
        try {
            // This call hits the server with the name I'm looking for and parses the JSON returned for the first 25 results
            PagedResult results = searchByName( charSequence.toString(), 1, 25, true);
            FilterResults filterResults = new FilterResults();
            filterResults.values = results.getResults();
            filterResults.count = results.getResults().size();
            return filterResults;
        } catch (JSONException e) {
            return new FilterResults();
        }
    }

    @Override
    protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
        if( filterResults != null ) {
            adapter.clear();
            adapter.addAll( (List<MyObject>)filterResults.values );
        }
    }
};

Then using the Filter:

    private AutoCompleteTextView beverageName;
    ...

    beverageName = findViewById( R.id.beverageName );
    ListAdapter adapter = ...
    adapter.setFilter(filter);
    beverageName.setAdapter(adapter);

or u can use this link also

http://www.grobmeier.de/android-autocomplete-with-json-data-served-by-struts-2-05122011.html