Devashish Mamgain questions

Devashish Mamgain answers

• Best way to write a jSON API on Google App Engine
• Android Chat Service
• Ios how can I verify that the phone number entered is actually the users phone number?
• How to check if a user is online
• Storing messages of different chats in a single database table
• IllegalArgumentException readExceptionFromParcel
• (Spring + JSP + jQuery-AJAX + JSON ) setting environment for UTF-8 issue?
• how to list out my contact list and send message in applozic
• Private chat using Firebase like WhatsApp