Ionic 4 Android Application fails to load the source on build

Question

I have an Application build with Ionic 4. When I use to build and install the Application with reload option it works (ionic cordova run android --l --c ). But when I do ionic cordova build android and deploying in a device, it does not load anything and results in blank screen. On inspecting, the following error got printed.

polyfills.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
cordova.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
vendor.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
styles.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
main.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
runtime.js:1 Failed to load resource: net::ERR_FILE_NOT_FOUND
/assets/icon/favicon.png:1 Failed to load resource: net::ERR_FILE_NOT_FOUND

Researched through and added delay in config.xml file <preference name="loadUrlTimeoutValue" value="700000" /> but that didn't worked. Also removed and add android, still no luck.

If I connect the device to machine and running the application directly to the device with reload command, it is throwing the error The connection to the server was unsuccessful.

Ionic version - 4.10.3; Ionic-Android version - android 6.3.0; Cordova - 7.1.0

Answer 1

Try this Ionic Cordova platform remove Android

Then

1. Ionic cordova platform add android
2. Ionic cordova prepare android
3. Ionic cordova build android

4. Ionic cordova run android

   If u want to use emulator then use

   Ionic cordova run android -l