How to Detect Hand Press on Android Screen

Question

I have a requirement that I have to count that At End of Day how many Time user kept Hand on Android Screen ?

So for that after googling I found that, there is proximity Sensor in Android which senses hand movement without touching screen. Proxymity Sensor is located somewhere on Top of Screen for Accessing object close to phone while attending and cancelling any calls

But I wanted to capture user hand press on Android Screen. What could be better solution ? or can my purpose be fully solved via proximity Sensor only ?

Answer 1

Proxymity Sensor is very rough and used to tell whether mobile device is close to something big as head.

You need to implement hooks for everything that user may touch, and increase your counter, that should be saved/restored when app goes to background and returns.

Note that you only can know about touches within your app.