title: how to rebuild android apk file - react-native
body: <p>I am developing an android app using react-native framework. I already generated apk file for that app but now i have done some changes to my app i mean in code i have added some functionalities. so how can i rebuild apk file that whatever changes have done should reflect to apk file. i have generated apk file by following the guidelines given in react-native documentation.</p>
  
  <p>I also tried for another app like deleting existing apk file and tried to build another apk file but it could not happen. </p>