Disable Lock Screen

Question

I am looking for a way to replace the stock lock screen (with an app, not a rom). What is the best way to do it, for a start to disable the lock screen on as much devices as

Answer 1

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE);
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);
lock.disableKeyguard();

in androidmanifest: