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While running the Android app in emulator each time I am getting the following error.

Installation failed with message null. It is possible that this issue is resolved by uninstalling an existing version of the apk if it is present, and then re-installing.

WARNING: Uninstalling will remove the application data!

Do you want to uninstall the existing application?

I tried to un-install the existing app but could not find that in settings.

Can someone please throw us some light on this plz...

CodeChimp
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sriharsha vardhan
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    you can use adb command to uninstall an app from emulator `adb uninstall com.my.firstapp`. see this post for more [link](http://stackoverflow.com/questions/25927124/how-to-uninstall-apk-or-execute-adb-command-automatically-before-run-or-debug) – drWisdom Feb 16 '16 at 16:26
  • This usually means DDMS timed out. Try setting longer timeout. If you are using ARM emulator, try using x86 emulators instead, it will be much faster. – StenSoft Feb 16 '16 at 18:45

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