To tackle the "Execution Failed for task:app" error in Android Studio, focus on the most impactful steps that can help you resolve the issue quickly. Here are the best steps to follow:-
1. Review Detailed Error Message:
Just review the specific error message in build output, to get an idea of what actually went wrong. Look for specific classes or lines of code mentioned in the errors.
2. Clean and Rebuild the project:
Cleaning and rebuilding can clear out any corrupted or stale files that might be causing issues.
To fix this, just go to Build > Clean Project, then Build > Rebuild Project.
3. Sync Gradle Files:
Outdated or incorrectly configured Gradle files can lead to compilation issues to fix this issue, click on the "Sync Project with Gradle Files" button or go to File> Sync Project with Gradle Files.
4. Upgrade the build tool version:
You can also upgrade the build tool version, and then it will also work
Previous version -> compileSdkVersion 23, New Version -> buildToolsVersion "23.0.1"