When I play Ingress, Ingress remains active. Even when my screen goes black, if I push the power button, Ingress is still active. I do not need to unlock my phone nor wait for it to "wake up". (The phone is locked though - to use any other app I need to unlock the phone.)

How do I get the same functionality for my camera app?

If I'm using the phone as a camera, with the camera app active, if the screen goes black, when I hit the power button, I want the camera to be open and active.

Things I've tried:

  • Keeping my phone unlocked when in paired to a trusted Bluetooth advice. Then when I push the power button, I get a screen where I have to swipe to wake it up. With Ingress, I don't have to swipe the screen nor wait for anything.
  • Snapshot. I've tried using the Snapshot app, but I have to wait for the phone to launch the camera app.
  • The camera on swipe from the lock screen ... and again I have to wait for the camera app to launch.

I'm willing to figure out how to build my own app if needed. (But would rather find something.)

I'm willing to take a battery hit.

  • Well, there are some spy camera apps available which can help you in doing that but I would say think again about it as it's capable of draining your device battery in an hour ! Jan 7, 2015 at 6:44
  • The app Haven at guardianproject.info/apps was built to turn a phone into a security camera. Search for guardianproject in Play.
    – Jim Clark
    Feb 6, 2022 at 16:25

1 Answer 1


It depends on your Android version. However, supposed you are using Lollipop, you can lock up an application to only make that one work.

You can also download an app called Caffeine from the Play Store that avoids your phone to go standby.

If you don't want to be noticed by any means, you can download an app called spy camera HD pro by MVM studio.

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