help on how to send sensor data through arduino to android app with esp8266 wifi

i need to send the current sensor data to the android application that i've developed using wifi esp8266 ,im using arduino mega ,i already research it and google it but they always use bluetooth, but on my project i need to send the datas through wifi esp8266 to the android mobile application can u pls help me i need it, asap :(

You don't actually need the mega. The ESP8266 is more powerful than the mega!

Perhaps you should look at the ESP8266 site itself.