How to force refresh the cached source files upon Ionic build/run?

What I did to solve my problem was to do re-initialize the Android platform.

ionic cordova platform remove android then ionic cordova platform add android

goto task manager and kill java se process

You need to increment your app version on your config.xml (at the top of your project folder) to reflect your changes before running:

<widget id="com.yourapp.id" version="0.0.8" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0"

On this example, increment the attribute version to 0.0.9: version="0.0.9".

Then run android or run ios.

Remove platform :

ionic cordova platform rm android

Re add platform :

ionic cordova platform add android

Step 1) copy www folder specific platform

ionic cordova prepare android

Step 2) build apk

ionic cordova build android

Step 3) deploy latest apk in device

ionic cordova run android