title: Android Studio - failed to start adb
body: <p>I recently started learning android programming using android studio but every time I open the emulator and drag an apk to the emulator it says:</p>
  
  <blockquote>
    <p>failed to start adb - Check settings to verify your chosen adb path is
    valid</p>
  </blockquote>
  
  <p>as shown in the link below.</p>
  
  <p>How can I fix this?</p>
  
  <p>PS: Sorry for my English.</p>
  
  <p><img src="https://i.stack.imgur.com/raa2q.png" alt="android failed to start adb image"></p>