title: Android Studio: No target device found: Why?
body: <p>When I first start <code>Android Studio</code> opening an existing project, and click <code>Run</code>, I get the error message <code>Error running app, No target device found</code>.
  I have my <code>Samsung</code> plugged in and <code>ADB debugging enabled</code>. It correctly shows up with the <code>adb devices</code> command and <code>ADB</code> shell works fine. I tried <code>adb start-server</code> with no joy. Strangely, If I start 'Debug app' first and then 'Run' it works fine, but I don't understand why this annoying step is necessary. Other <code>StackOverflow</code> answers said to do "Edit Configurations" but that doesn't show the options suggested. I'm running <code>AS V3.01</code>. Any clue?</p>