uninstallable app for Android

Question

I want to make an app in android which should not be uninstalled by the user once its get installed in the device, which should be like an default app like market.

Answer 1

This is simply impossible for a user-level app. For good reason - just imagine putting a malicious app on the market that cannot be removed!

The only way to do this would be with root privileges, like carriers do with pre-installed crapware that is stored on the read-only system partition of your phone.

It sounds like this is an internal app that you want to put on phones in your company (?). If that's the case, you will need to temporarily get root access and put the app on the system partition. There is no way to do this using the regular means available to a third-party app developer, and for good reason.