Is there a way to wake up a phone by voice? I mean: If the screen is black and my App is running, I want to shout a special command (like: „call my wife“) and the phone ‚wakes‘ up and does, what I shouted?
This would be great and extremely helpful if you don‘t have hands free.
What do you think: If I start the App and go for a walk (an hour or so). The App listens permanently and if it „hears“ a special word (like EMERGENCY) it sends an email to someone.
You will need to set your app to Keep Awake, there are clock timer methods or extensions available that can do this. Bear in mind, this will eat up your battery, 6 - 10 % per hour.
In my case (test app), the brightness is minimized after 10 seconds (Button1). After clicking Button2, the brightness is reset to the initial value. This helps conserve battery power.