Hi everyone 
Lately when I try to build android I get the following errors:
Failed to execute aapt
com.android.ide.common.process.ProcessException: Failed to execute aapt
Then there is a lot of technical stuff saying
resource string/fb_app_name (aka io.ionic.starter/fb_app_name) not found.
And then the final error is:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
BUILD FAILED in 18s
What’s going wrong!?
hi,
try this ,
cordova plugin add https://github.com/amritk/cordova-plugin-facebook4 --save --variable APP_ID="" --variable APP_NAME=""
your APP_ID and APP_Name it’s on your Facebook App .
What I had to do was:
Go to platforms/app/src/main/res/values/strings.xml and add:
<string name="fb_app_id">ID</string>
<string name="fb_app_name">APP_NAME</string>
Thank you so much for finding the solution. It’s very helpfull for me too 
Thanks so much !!! This solved my bug
after adding those values in the file strings, it returns me error of mergeDebugResources in the construction on duplicate values
FAILURE: Build failed with an exception.
Execution failed for task ‘:mergeDebugResources’.
[string/fb_app_id] /Users/user/Desktop/home-made-repo/platforms/android/res/values/facebookconnect.xml [string/fb_app_id] /Users/user/Desktop/home-made-repo/platforms/android/res/values/strings.xml: Error: Duplicate resources
[string/fb_app_name] /Users/user/Desktop/home-made-repo/platforms/android/res/values/facebookconnect.xml [string/fb_app_name] /Users/user/Desktop/home-made-repo/platforms/android/res/values/strings.xml: Error: Duplicate resources