[android] cannot find zip-align when publishing app

Steps to fix this,

  1. Install latest version of Android SDK Build-Tools
  2. Check if zipalign.exe is available in folder android-sdk\build-tools\ e.g. android-sdk\build-tools\21.1.0\
  3. In some older version of android you may not find zipalign.exe. Do not panic, check any other verion in which zipalign is available.
  4. Open your project.properties file and configure build-tools to point to the in which zipalign.exe is present. e.g. sdk.buildtools=21.1.0.
  5. Restart your eclipse and try exporting again. It should work.