Android Google Places Autocomplete API Example

July 12, 2017 , 0 Comments

Google Places Auto Complete API :

PLEASE MAKE YOUR GOOGLE API KEY Like : AIzaSyDelCQWYAawxyGdYxguimWtRB7P3kGBQNy

We make  ArrayAdapter for AutoComplete TextView. Directly integrate this Adapter to  Autocomplete TextView.

---------------------------------- AutoComplete ArrayAdapter Class --------------
public class GooglePlacesAutoExtender extends ArrayAdapter implements Filterable {

private static final String LOG_TAG = "Google Places Autocomplete";
private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
private static final String OUT_JSON = "/json";

private static final String API_KEY = ""; //ex. : AIzaSyDelCQWYAawxyGdYxguimWtRB7P3kGBQNy

private ArrayList resultList;

public GooglePlacesAutoExtender(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}

@Override
public int getCount() {
return resultList.size();
}

@Override
public String getItem(int index) {
return (String) 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;
}


public static ArrayList autocomplete(String input) {

ArrayList resultList = null;
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON);
sb.append("?key=" + API_KEY);
sb.append("&components=country:in&types=(cities)");
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(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;
}
}


--------------------- HOW TO USE -----------------------

AutoCompleteTextView autoCompView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextViewA);
autoCompView.setAdapter(new GooglePlacesAutoExtender(this, android.R.layout.simple_list_item_1));

Contributer

Some say he’s half man half fish, others say he’s more of a seventy/thirty split. Either way he’s a fishy bastard. Google

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