how to use android json webserver
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hello every one i am new with servers things i i want to develop program that get data from the database on the server and it's my first time i don't have any idea of this thing

1- how can i make a virtual server  for testing on my PC <p>
2- how can i connect the emulator with this virtual server
<p>3- how can i request the data from thee database

i found so many examples about the json and webserver but i don't know how to make virtual server and connect the emulator to it
any help please