"Android" [problem]-"Waiting for target device to come online".

• Environment:

  WIN10 Pro Edition (creator), Android studio 2.3.1

• Problem Description:

  After installing play Android studio after creating a project, after establishing the AVD, you cannot start the AVD when you run the program, specifically:" Waiting for target device to come online ". That is, "wait for the target device to be online."

• Problem Analysis:

  Analysis 1: This is a reference to the ADB-related issues in Android, mostly because ADB ports are occupied (Eclipse, simulator, etc.).

  Analysis 2: This problem may also be, the blogger is this problem, referring to the "waiting for the target device to come online" in the Android Studio 2.3 article

• Problem solving:

  analysis 1 : Command line (Win+r–cmd) to navigate to android_sdk/platform-tools/directory, execute" adb kill-server "

  Analysis 2: I was also have the same issue 2 days ago when I update my Android studio, today I solve my issue when I WA s playing around with settings then I saw the in my SDK tools setting Android Emulator are uncheck so I simply checked tha T box and now emulator are working fine.
  Try This steps if you also:
  Go to SDK tools > SDK Tools
  Check Android Emulator and click Apply
  

"Android" [problem]-"Waiting for target device to come online".