Autocomplete In Android Not Working With Dynamic Data

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 press wh

Solution 1:

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 = newFilter() {

    @OverridepublicCharSequenceconvertResultToString(Object resultValue) {
        return resultValue.toString();
    }

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

    @OverrideprotectedvoidpublishResults(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 );
    ListAdapteradapter= ...
    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

Solution 2:

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;

publicclassWikiSuggestActivityextendsActivity {
    public String data;
    public List<String> suggest;
    public AutoCompleteTextView autoComplete;
    public ArrayAdapter<String> aAdapter;
    /** Called when the activity is first created. */@OverridepublicvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        suggest = newArrayList<String>();
        autoComplete = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
        autoComplete.addTextChangedListener(newTextWatcher(){

            publicvoidafterTextChanged(Editable editable) {
                // TODO Auto-generated method stub

            }

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

            }

            publicvoidonTextChanged(CharSequence s, int start, int before, int count) {
                StringnewText= s.toString();
                newgetJson().execute(newText);
            }

        });

    }
   classgetJsonextendsAsyncTask<String,String,String>{

    @Overrideprotected String doInBackground(String... key) {
        StringnewText= key[0];
        newText = newText.trim();
        newText = newText.replace(" ", "+");
        try{
            HttpClienthClient=newDefaultHttpClient();
            HttpGethGet=newHttpGet("http://en.wikipedia.org/w/api.php?action=opensearch&search="+newText+"&limit=8&namespace=0&format=json");
            ResponseHandler<String> rHandler = newBasicResponseHandler();
            data = hClient.execute(hGet,rHandler);
            suggest = newArrayList<String>();
            JSONArrayjArray=newJSONArray(data);
            for(int i=0;i<jArray.getJSONArray(1).length();i++){
            StringSuggestKey= jArray.getJSONArray(1).getString(i);
            suggest.add(SuggestKey);
            }

        }catch(Exception e){
            Log.w("Error", e.getMessage());
        }
        runOnUiThread(newRunnable(){
            publicvoidrun(){
                 aAdapter = newArrayAdapter<String>(getApplicationContext(),R.layout.item,suggest);
                 autoComplete.setAdapter(aAdapter);
                 aAdapter.notifyDataSetChanged();
            }
        });

        returnnull;
    }

   }
}

Hope it helps Thank You!.