if second application installed on phone then first will not found

[Pramod P Deore]

when I had tried to install any application for the first time , it gives me following error as.


D:\Pramod Backup\android\android-sdk-windows\tools>adb install pramod.apk
77 KB/s (8628 bytes in 0.109s)
pkg: /data/local/tmp/pramod.apk
Failure [INSTALL_FAILED_ALREADY_EXISTS]


But there is no pramod.apk file is present in phone , but if I install the application using -l -r as

D:\Pramod Backup\android\android-sdk-windows\tools>adb install -l -r pramod.apk
38 KB/s (8628 bytes in 0.218s)
pkg: /data/local/tmp/pramod.apk
Success

It will installed application succesfully. Why is it so?

and when I tried another application to install as


D:\Pramod Backup\android\android-sdk-windows\tools>adb install -l -r Final.apk
38 KB/s (8628 bytes in 0.218s)
pkg: /data/local/tmp/Final.apk
Success

then previous application (i.e here pramod.apk) not shown in phone.

[Monu Tripathi]

Hint: Do you understand the meaning of using -l -r switches with adb install? Have you tried to find out how the install-system finds out if two applications are same or why do you get a INSTALL_FAILED_ALREADY_EXISTS message?