title: Expo can't connect to android-studio emulator (Ubuntu 20.04)
body: <p>When I run &quot;npm start&quot; and then 'a'/ &quot;sudo expo start --android&quot; the connection to the android emulator fails.
  the error I get is:</p>
  <pre><code>Couldn't start project on Android: Error running adb: No Android connected device found, and no emulators could be started automatically.
  Please connect a device or create an emulator (https://docs.expo.io/workflow/android-studio-emulator).
  Then follow the instructions here to enable USB debugging:
  https://developer.android.com/studio/run/device.html#developer-device-options. If you are using Genymotion go to Settings -&gt; ADB, select &quot;Use custom Android SDK tools&quot;, and point it at your Android SDK directory.
  </code></pre>
  <p>While trying to debug it I found:</p>
  <ul>
  <li><p>The app is running on web browser</p>
  </li>
  <li><p>While launching the AVD on emulator on android-studio I get on android studio events:</p>
  <pre><code> Emulator: E0810 10:41:04.480101550 89662 socket_utils_common_posix.cc:201] check for SO_REUSEPORT: {&quot;created&quot;:&quot;@1597045264.480085451&quot;,&quot;description&quot;:&quot;SO_REUSEPORT unavailable on compiling system&quot;,&quot;file&quot;:&quot;/mnt/tmpfs/src/android/emu-master-dev/external/grpc/src/core/lib/iomgr/socket_utils_common_posix.cc&quot;,&quot;file_line&quot;:169} 
  </code></pre>
  </li>
  <li><p>I Made sure that .bashrc includes the right SDK path: &quot;export ANDROID_SDK=/home/user/Android/Sdk&quot;, and followed this <a href="https://docs.expo.io/workflow/android-studio-emulator/" rel="nofollow noreferrer">link</a></p>
  </li>
  <li><p>I'll mention that the emulator already ran my app, I'm not sure what changed the configuration and made the app not running on android-studio emulator. I re-install android-studio but it's still have no connction</p>
  </li>
  </ul>