I am working on an Android application This application is a parental advisor application and it will be installed on the parents' phone and on the child's phone. My question is how will the screenshot be taken from the boy's phone without his knowledge?
thats pretty high privilege, which need special permissions. you probably have to create AccessibilityService, but be aware, that Google Play may refuse your app from publish in their store. btw. you can't start this Service from the code, user must enable it in system Settings