I fixed it
It was an adb problem with my emulator due to the wrong "SDK path location"
I had to change it from the registry editor,
Here is the solution:
https://msdn.microsoft.com/en-us/library/mt228282.aspx#ADB
1-Open Registry Editor by selecting Run from the Start buttons context menu, typing regedit in the dialog box, and choosing OK.
2-Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Android SDK Tools in the folder tree on the left.
3-Modify the Path registry variable to match the path to your Android SDK.
source share