Google Places autocomplete Android - Not working

I am new to Android App development. I followed this toturial to write a simple Google Places autocomplete Android App, but it does not return any suggestions when I start typing in the app; it gives NativeCrypto error in LogCat when I write anything in the autocomplete textview. Here is my code:

package com.example.newxyz; 

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.Toast;

public class GooglePlacesAutocompleteActivity extends Activity implements OnItemClickListener {
    private static final String LOG_TAG = "Google Places Autocomplete";
    private static final String PLACES_API_BASE = "http://ift.tt/1g2WBZ4";
    private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
    private static final String OUT_JSON = "/json";
    private static final String API_KEY = "AIzaSyAujQlZ1Jj64NAHMoynXjI253MVRzGW09w";
    private static final String True = "true";
    private static final String language = "en";

    AutoCompleteTextView autoCompView;
    @Override

   public void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        autoCompView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);

        autoCompView.setAdapter(new GooglePlacesAutocompleteAdapter(this, R.layout.list_item));

        autoCompView.setOnItemClickListener(this);

    } 



    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {

        String str = (String) adapterView.getItemAtPosition(position);
        Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
   }

    public static ArrayList<String> autocomplete(String input) {
        ArrayList<String> resultList = null;
        HttpURLConnection conn = null;
        StringBuilder jsonResults = new StringBuilder();
       try {
            StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON);
            sb.append("?sensor=" + True);
            sb.append("&key=" + API_KEY);
            sb.append("&language" + language);
            //sb.append("&components=country:gr");
            sb.append("&input=" + URLEncoder.encode(input, "utf8"));
            URL url = new URL(sb.toString());
            conn = (HttpURLConnection) url.openConnection();
            InputStreamReader in = new InputStreamReader(conn.getInputStream());


            // Load the results into a StringBuilder

           int read;
            char[] buff = new char[1024];
            while ((read = in.read(buff)) != -1) {
                jsonResults.append(buff, 0, read);
            }

        } catch (MalformedURLException e) {

            Log.e(LOG_TAG, "Error processing Places API URL", e);

            return resultList;
       } catch (IOException e) {
            Log.e(LOG_TAG, "Error connecting to Places API", e);
            return resultList;
        } finally {
            if (conn != null) {

                conn.disconnect();
            }
        }
        try {           
            // Create a JSON object hierarchy from the results
            JSONObject jsonObj = new JSONObject(jsonResults.toString());
            JSONArray predsJsonArray = jsonObj.getJSONArray("predictions");
            // Extract the Place descriptions from the results
            resultList = new ArrayList<String>(predsJsonArray.length());
            for (int i = 0; i < predsJsonArray.length(); i++) {
                System.out.println(predsJsonArray.getJSONObject(i).getString("description"));
                System.out.println("============================================================");
                resultList.add(predsJsonArray.getJSONObject(i).getString("description"));
            }
        } catch (JSONException e) {
            Log.e(LOG_TAG, "Cannot process JSON results", e);
     }
        return resultList;
    }
   class GooglePlacesAutocompleteAdapter extends ArrayAdapter<String> implements Filterable {
        private ArrayList<String> resultList;
        public GooglePlacesAutocompleteAdapter(Context context, int textViewResourceId) {
            super(context, textViewResourceId);
        }
        @Override
        public int getCount() {
            return resultList.size();
        }
        @Override
        public String getItem(int index) {
            return resultList.get(index);
        }
        @Override
        public Filter getFilter() {
            Filter filter = new Filter() {
                @Override
                protected FilterResults performFiltering(CharSequence constraint) {
                    FilterResults filterResults = new FilterResults();
                    if (constraint != null) {
                        // Retrieve the autocomplete results.

                      resultList = autocomplete(constraint.toString());
                        // Assign the data to the FilterResults
                        filterResults.values = resultList;
                        filterResults.count = resultList.size();
                    }
                    return filterResults;
                }
                @Override

               protected void publishResults(CharSequence constraint, FilterResults results) {
                   if (results != null && results.count > 0) {
                        notifyDataSetChanged();
                    } else {
                        notifyDataSetInvalidated();
                    }
                }

            };
            return filter;
       }
    }
}

Here is my LogCat error:

05-04 13:16:27.705: E/NativeCrypto(9312): ssl=0x611c0a20 cert_verify_callback x509_store_ctx=0x62625940 arg=0x0
05-04 13:16:27.705: E/NativeCrypto(9312): ssl=0x611c0a20 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_RSA

• I have enabled Google Places API for Android in console.developers.google.com
• I am using a Browser key for my app
• I have looked for answers to my problem and haven't found any relevant answer yet
• I have given Internet permissions in the Menifest file
• In Overview of the Developer Console, the Graph is showing the requests, which means requests are made but there is no response.

Any help would be much appreciated. Thanks