title: Protect apk installation with password
body: <p>I am making an android application.To use my application user has to first create an account on a web server.He/She will be provided user id and password while creating Account on that web server.After that when he/she try to install my apk from Google play or from SD card,he/she will be asked to provide that user id and password that is given from that web server.If he/she enters correct user id and password then only my apk will be allowed to install on user's android device else my apk will not be installed on his/her android device.How is it possible?Any help will be appreciated.</p>