android - APP not installed an existing package by the same name with a conflicting signature is already installed -


i'm new android development have developed 1 application , distribute copy bin folder not in playstore . user try install app second time different version it's giving "app not installed existing package same name conflicting signature installed" same version it's not coming this.

i want install app without uninstalling(means user don't want uninstall) previous 1 without using play store , 1 more doubt when signature generates .

thanks in advance.

see happens: you'd compiled debug version of app , distributed own way. @ time ide used debug certificate auto created every time install ide/sdk. now, time has passed , you'd switched working pc/notebook or you'd reinstalled ide/sdk or you'd switched lets eclipse androidstudio or changed os win7 win8 or ubuntu, no matter did result brand new debug certificate generated , used now. , you'd lost previous debug certificate 4ever (depends how happens).
certificate stands unique fingerprint , each debug or release certificate has own unique fingerprint. fingerprint signature android talking about. every apk signed using certificate , has signature, mandatory.
so, since using different debug key store certificate not able want. right scenario create release certificate (key store) , sign app , distribute app way want. way should save release certificate , reuse later sign upcoming updates.
should restore certificate you'd signed apk or way users has uninstall , install.


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