To achieve this follow some simple steps below:
Step 1: Create PlaceSearchActivity.java class
public class PlaceSearchActivity extends Activity{
PlacesTask placesTask;
EditText etxtPlaces;
ListView listViewPlaces;
PlaceAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.activity_main);
initializeControls();
handleTextChangeListner();
} catch (Exception e) {
e.toString();
}
}
private void initializeControls(){
try {
etxtPlaces = (EditText)findViewById(R.id.etxtPlaces);
listViewPlaces = (ListView)findViewById(R.id.listViewPlaces);
} catch (Exception e) {
e.toString();
}
}
private void handleTextChangeListner(){
try {
etxtPlaces.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) {
// TODO Auto-generated method stub
placesTask = new PlacesTask();
placesTask.execute(s.toString());
}
});
} catch (Exception e) {
e.toString();
}
}
private class PlacesTask extends AsyncTask<String, Void, String>{
@Override
protected String doInBackground(String... place) {
// For storing data from web service
String data = "";
try {
// Obtain browser key from https://code.google.com/apis/console
String key = "key=YOUR API KEY";
String input="";
input = "input=" + URLEncoder.encode(place[0], "utf8");
// place type to be searched
String types = "types=geocode";
// Sensor enabled
String sensor = "sensor=false";
// Building the parameters to the web service
String parameters = input+"&"+types+"&"+sensor+"&"+key;
// Output format
String output = "json";
// Building the url to the web service
String url = "https://maps.googleapis.com/maps/api/place/autocomplete/"+output+"?"+parameters;
try {
data = downloadUrl(url);
} catch (IOException e) {
e.printStackTrace();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return data;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
parseAndBindDataToListview(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void parseAndBindDataToListview(String result){
try {
JSONObject jsonObject2 = new JSONObject(result);
JSONArray array = jsonObject2.getJSONArray("predictions");
JSONObject[] jsonObject = new JSONObject[array.length()];
for (int i = 0; i < array.length(); i++) {
jsonObject[i] = array.getJSONObject(i);
}
adapter = new PlaceAdapter(PlaceSearchActivity.this, R.layout.place_list_row, jsonObject);
listViewPlaces.setAdapter(adapter);
} catch (Exception e) {
e.toString();
}
}
/** A method to download json data from url */
private String downloadUrl(String strUrl) throws IOException{
String data = "";
InputStream iStream = null;
HttpURLConnection urlConnection = null;
try{
URL url = new URL(strUrl);
// Creating an http connection to communicate with url
urlConnection = (HttpURLConnection) url.openConnection();
// Connecting to url
urlConnection.connect();
// Reading data from url
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while( ( line = br.readLine()) != null){
sb.append(line);
}
data = sb.toString();
br.close();
}catch(Exception e){
Log.d("Exception while downloading url", e.toString());
}finally{
iStream.close();
urlConnection.disconnect();
}
return data;
}
}
public class PlaceAdapter extends ArrayAdapter<JSONObject>{
private Context context;
private int textViewResourceId;
private JSONObject[] data;
public PlaceAdapter(Context context, int textViewResourceId, JSONObject[] objects) {
super(context, textViewResourceId, objects);
this.context = context;
this.textViewResourceId = textViewResourceId;
data = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Viewholder holder = null;
try {
if(convertView==null){
holder = new Viewholder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(textViewResourceId, parent, false);
holder.txtPlace = (TextView) convertView.findViewById(R.id.txtPlace);
}
holder.txtPlace.setText(data[position].getString("description"));
} catch (Exception e) {
e.printStackTrace();
}
return convertView;
}
static class Viewholder{
TextView txtPlace;
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<EditText
android:id="@+id/etxtPlaces"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="18dp"
android:ems="10" />
<ListView
android:id="@+id/listViewPlaces"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/etxtPlaces"
android:layout_centerHorizontal="true"
android:layout_marginTop="29dp" >
</ListView>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/txtPlace"
android:layout_width="wrap_content"
android:padding="10dp"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
<uses-permission android:name="android.permission.INTERNET"/>
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