Andrew Peters wrote:I had this error message but was still able to find my HelloAndroid app listed in the available apps in the emulator by clicking on the launch button.
If application is installed already in your device then you can't install the same file again. Are you sure you are getting the same error message(i.e. Failed to install HelloAndroid.apk on device) or the error is "Application already exist". If you got second error then uninstalled application first and then install it again. Or you may use command as ->
adb install -l -r ApplicationName.apk
Life is easy because we write the source code.....