title: Android Emulator never finishes loading
body: <p>I'm trying to launch a project in Android Studio using the Android Virtual Device Manager. At first the Android Emulator pops up with a Google icon and a loading bar, but it never actually finishes loading.
  <a href="https://i.stack.imgur.com/VQIsW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VQIsW.png" alt="Emulator:"></a></p>
  
  <p>I also tried running the program without using the Device Manager and just clicking the 'Run' button. A, in which case I get this:
  <a href="https://i.stack.imgur.com/fBB2d.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fBB2d.png" alt="enter image description here"></a>
  "Instant run requires that the platform corresponding to your target device (Android P Preview) is installed."
  And if I click on "Install and continue" it says:
  "All packages are not available for download!
  The following packages are not available:
  - Package id Platforms;android-P"</p>
  
  <p>These are all the versions I have installed:
  <a href="https://i.stack.imgur.com/7CwSU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7CwSU.png" alt="enter image description here"></a></p>
  
  <p>Instant run requires that the platform corresponding to your target device (Android P Preview) is installed.As you can see, the Android P Preview is actually installed. Although it says on the right it's "Partially installed" there doesn't seem to be any update option.
  I have no idea why this won't work.</p>
  
  <p>Please help.</p>