-  التعامل مع سطر الاوامر لإضافة platform أندرويد و  ويندوز فون للتطبيق .
- الوقوف عند خطأ شائع فى بداية بناء التطبيق من سطر الاوامر .

 ERROR building one of the platforms: Failed to find 'ANDROID_HOME'  environment variable. Try setting setting it manually.
  Failed to find 'android' command in your 'PATH'. Try update your 'PATH' to include path to valid SDK directory.
You may not have the required environment or OS to build this project
Error: Failed to find 'ANDROID_HOME' environment variable. Try setting setting it manually.
Failed to find 'android' command in your 'PATH'. Try update your 'PATH' to include path to valid SDK directory.


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