title: Why com.google.android could not be found in my project?
body: <p>I download one project from Internet. And the project could not find the library : com.google.android.</p>
  
  <p><img src="https://i.stack.imgur.com/Uapk7.png" alt="enter image description here"></p>
  
  <p>I found some answers from the Internet. Like set your project's properties, but it does not work for me.</p>
  
  <p>I already download the Google API from SDK 
  <img src="https://i.stack.imgur.com/RtXTz.png" alt="enter image description here"></p>
  
  <p>And I set the project properties : project build target to Google API like this.
  <img src="https://i.stack.imgur.com/JjWhS.png" alt="enter image description here"></p>
  
  <p>What the others things I should do?</p>