010_fix_gradle.sh

#!/bin/sh

if grep -q "com.android.support:support-v4:26.0.0" platforms/android/build.gradle; then
    echo "build.gradle already fixed"
else
	echo "configurations.all {\nresolutionStrategy.force 'com.android.support:support-v4:26.0.0'\n}" >> platforms/android/build.gradle
	echo "android platform fixed"
fi

This is a fix for ionic if you get a building problem in android like:

• What went wrong:
  Execution failed for task ':processDebugResources'.

com.android.ide.common.process.ProcessException: Failed to execute aapt

You can find more about this problem in this thread: https://forum.ionicframework.com/t/android-build-broken-after-gradle-dependencies-update-execution-failed-for-task-processdebugresources-com-android-ide-common-process-processexception-failed-to-execute-aapt/109982

How to use
Add this file to hooks/after_platform_add/010_fix_gradle.sh. It will fix this problem if you remove and add the platform:
ionic cordova platform remove adroid ionic cordova platform add android

Please check regularly if you still need this fix or if the cordova build is fixed.

Good afternoon,
Can you describe in more detail the folder, file and command that I should change?

This issue has wasted many hours - your solution worked for me, just wanted to say thanks!