title: Sencha touch android app packages for only api level 17
body: <p>I have created a Sencha Touch app for Android. I am using Sencha Architect 2.2.1 and I packaged it for Android using Sencha CMD 3.1.1.274. I have installed all the APIs on Android SDK from level 14 to level 17. 
  I packaged the application using Command Prompt and the following command: sencha app package build packager.json
  The problem is that it only gives me an APK in my output folder if the API level is set at 17. If I keep the API level 16 or 15, it shows me the following error :</p>
  
  <pre><code>Error: Target id is not valid. Use 'android.bat list targets' to get the target
  ids.
  
  
  ""C:/Program Files/Android/sdk\tools\android" create project --target android-16
   --name BeatlesLyrics --activity STActivity --path "build/apks\/" --package com.
  mycompany.BeatlesLyrics"
  Can not open destination file for writing
  Failed to copy packager library
  Failed to package application
  Copy operation failed src=C:\Users\Shaishav\bin\Sencha\Cmd\3.1.1.274\stbuild\st-
  res/android/\nimblekit.jar dst=build/apks\\libs\nimblekit.jar
  
  [ERR] stbuild exited with non-zero code : 3
  </code></pre>
  
  <p>I have installed the API 16 and 15 too in android sdk. 
  So why am i getting this error?</p>