title: Can't run demo android project from github
body: <p>I have recently started android development and am in a part where I would like to add some features I have found on github. I have never imported a project into android studio and am having problems. I have downloaded the zip file from <a href="https://github.com/CyberAgent/android-gpuimage" rel="nofollow noreferrer">https://github.com/CyberAgent/android-gpuimage</a> . I have extracted it and and opened up the project inside of android studio:</p>
  
  <p><a href="https://i.stack.imgur.com/lTCPz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lTCPz.png" alt="enter image description here"></a></p>
  
  <p>Then this is the screen I get when I open the project.From the screen I  want to run the 'sample' by clicking run but I get the error:</p>
  
  <p><a href="https://i.stack.imgur.com/VkfpY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VkfpY.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/nrkEP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nrkEP.png" alt="enter image description here"></a></p>
  
  <p>I have also tried to gradle sync the project before running the project but it did not work. Am I missing something? On Github it says the project the build is valid.</p>