title: not finding android sdk (Unity)
body: <p>Error:</p>
  
  <pre><code>Invalid command android
  UnityEditor.HostView:OnGUI()
  </code></pre>
  
  <p>CommandInvokationFailure: </p>
  
  <pre><code>Unable to list target platforms. Please make sure the android sdk path is correct. See the Console for more details. 
  C:/Program Files/Java/jdk1.8.0_121\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/great/AppData/Local/Android/Sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
  
  stderr[
  Error:Invalid command android
  ]
  stdout[
  
  ]
  exit code: 64
  UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
  UnityEditor.Android.AndroidSDKTools.RunCommandInternal (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
  UnityEditor.Android.AndroidSDKTools.RunCommandSafe (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
  UnityEditor.HostView:OnGUI()
  </code></pre>
  
  <p>Error building Player: </p>
  
  <pre><code>CommandInvokationFailure: Unable to list target platforms. Please make sure the android sdk path is correct. See the Console for more details. 
  C:/Program Files/Java/jdk1.8.0_121\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/great/AppData/Local/Android/Sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
  
  stderr[
  Error:Invalid command android
  ]
  stdout[
  
  ]
  exit code: 64
  </code></pre>
  
  <p>Screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/stCyA.jpg" alt="screenshot"></p>