Make An App Show Up As An Android Lock Screen?

I haven't found a definite answer to this yet. Lots of apps let you build/install custom lock screens without root, etc. It's just like installing an app. I found this in the dev g

Solution 1:

You can't (at least if you follow the rules) replace the secure lock screen. You can have a lock-screen like activity that will show up when the phone is locked. Use FLAG_SHOW_WHEN_LOCKED, but notice that your activity cannot be transparent - i.e. it cannot be a dialog.