Can I provide access to an Android App without unlocking the Lockscreen?

Question

Is it possible to develop an Andriod App which can be launched directly from the Lock screen without unlocking the phone (like the Camera app)?

Answer 1

No. Not atleast if you are not using a Custom Rom. Android by default supports only the Camera App and the Emergency dialer in the Lock Screen. Any other Apps cannot be launched without unlocking the Phone due to Security and Privacy reasons.

Even ,in the Camera App, you cannot view the Previous taken pictures or the Gallery. Camera App was decided to be allowed a launch for emergency reasons like for some visual proof collection and such things,even if the phone does not belong to you.