Here below is the code for searching places by using place name.

I use api provides by google also know as google place api.

"http://maps.googleapis.com/maps/api/geocode/json?address="+CITY_NAME+"&sensor=true";
In response of it We get a json having Latlng of the place and We can show these Latlng on Map.

To get Json , you can use these line after get response

String url ="http://maps.googleapis.com/maps/api/geocode/json?address="+CITY_NAME+"&sensor=true";
String response = WebServiceConnection.GetData(url);
try{
 jsonObject =new JSONObject(response);

  if(jsonObject.getJSONArray("results").length()>0){

 }
JSONArray resultArray = jsonObject.getJSONArray("results");
JSONObject resultJsonObject = resultArray.getJSONObject(0);
String lat  = resultJsonObject.getJSONObject("geometry").getJSONObject("location").getString("lat");
String lng = resultJsonObject.getJSONObject("geometry").getJSONObject("location").getString("lng");

       return true;
 }
catch(JSONException e)
    {
e.printStackTrace();

    return false;
    }