##Android Json Veri Çekme Görüntüleme LİNK #

https://gelecegiyazanlar.turkcell.com.tr/blog/android-ile-web-servis-cagirma

http://umiitkose.com/2015/09/android-studio-json-kullanimi/

http://tugbaustundag.com/restful-web-servisi-ile-post-ve-get-islemleri/
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https://www.mobilhanem.com/android-button-tiklama-efekti/
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action bar
https://github.com/serkancay/ActionBar/blob/master/app/src/main/java/com/serkancay/actionbar/MainActivity.java
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https://www.facebook.com/androidevreni/
json

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Login ekranı

https://www.mobilhanem.com/android-login-ekran-yapimi-1-php-ve-mysql-kullanarak/

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http://www.gokhanakgol.com/2012/02/26/android-mssql-uygulamasi/
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https://www.sitepoint.com/retrofit-a-simple-http-client-for-android-and-java/

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https://futurestud.io/blog/retrofit-send-objects-in-request-body