title: Error While Running Android Build On React Native
body: <p>I have installed all necessary SDK , Platform Tools . I've the emulator open and running, adb added in PATH. Still this error isn't letting me through.</p>
  <pre><code>info Running jetifier to migrate libraries to AndroidX. You can disable it using &quot;--no-jetifier&quot; flag.
  Jetifier found 967 file(s) to forward-jetify. Using 4 workers...
  info JS server already running.
  info Launching emulator...
  /bin/sh: adb: command not found
  info Installing the app...
  error Failed to launch emulator. Reason: No emulators found as an output of `emulator -list-avds`.
  warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
  
  Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
  Use '--warning-mode all' to show the individual deprecation warnings.
  See https://docs.gradle.org/6.2/userguide/command_line_interface.html#sec:command_line_warnings
  error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Run CLI with --verbose
   FAILURE: Build failed with an exception.flag for more details.
  
  
  * What went wrong:
  Could not determine the dependencies of task ':app:installDebug'.
  &gt; SDK location not found. Define location with an ANDROID_SDK_ROOT environment variable or by setting the sdk.dir path in your project's local properties file at '/Users/manndave/IdeaProjects/MyFirstReactNative/android/local.properties'.
  
  * 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.
  
  * Get more help at https://help.gradle.org
  
  BUILD FAILED in 3s
  
  Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081```
  </code></pre>