How To Build A Global Search URL In Lightning Experience Using Apex

If your in lightning experience on click of any actionable item you want to take the user to the Global Search and perform the search action using the dynamic search string.To get the url of the global search in lightning using apex please refer the below code.

String searchStr = 'Sree'; //Search String
String stringToEncode = '{"componentDef":"forceSearch:search","attributes":{"term":"'+searchStr+ '","scopeMap":{"type":"TOP_RESULTS"},"context":{"disableSpellCorrection":false,"SEARCH_ACTIVITY":{"term":"'+ searchStr + '"}}}}';
String encodedStr = EncodingUtil.base64Encode(Blob.valueOf(stringToEncode)); //Base64 encoding
String redirectUrl='/one/one.app?source=aloha#'+encodedStr;

The format of url must be

     String redUrl = '/one/one.app?source=aloha#'+base64EncodedSearchString;

If you want to the same thing using java script please refer this post

Hope this helps you..Enjoy..!