title: When i am trying to run my flutter app it getting an Error running gradle
body: <p>i am getting an error when i trying to run the app. please help. The error in cmd is below -
  Error running Gradle:
  ProcessException: Process "C:\Flutter projects\FlatApp-Firebase-Flutter-master\android\gradlew.bat" exited abnormally:</p>
  
  <p>FAILURE: Build failed with an exception.</p>
  
  <ul>
  <li><p>Where:
  Build file 'C:\Flutter projects\FlatApp-Firebase-Flutter-master\android\app\build.gradle' line: 14</p></li>
  <li><p>What went wrong:
  A problem occurred evaluating project ':app'.</p>
  
  <blockquote>
    <p>ASCII</p>
  </blockquote></li>
  <li><p>Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with
  --scan to get full insights.</p></li>
  <li><p>Get more help at <a href="https://help.gradle.org" rel="nofollow noreferrer">https://help.gradle.org</a></p></li>
  </ul>
  
  <p>BUILD FAILED in 14s
    Command: C:\Flutter projects\FlatApp-Firebase-Flutter-master\android\gradlew.bat app:properties</p>
  
  <h2>Please review your Gradle project setup in the android/ folder.</h2>
  
  <p>line nine in app-build-gradle is below-
  def flutterRoot = localProperties.getProperty('flutter.sdk')
  if (flutterRoot == null) {
      throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
  }</p>