Hello, I have install Android Studio 2.1.1 in D:/Users/....../Andoid/Android Studio/ and D:/Users/....../Andoid/sdk/. I have also created D:/Users/....../AndroidStudioProjects/MyApplication/ and I can see the "Android Studio 2.1.1" window showing the mobile phone picture with "My Application" and "Hello World!" I then set my mobile phone "Android debugging" and "USB debugging notify" to ture, connected my mobile phone with my computer by USB (in my computer, I can see the files in my mobile phone). Finally, I click the Run icon in the the "Android Studio 2.1.1" window, it displayed "Select Deployment Target" window with message: "Nothing to show". Now, can you tell me what I should do to let my application run in my mobile phone? Thanks a lot for your help!