root - Android: How to access display (Activity) of different app that is not shown in upper layer -

hello android developers,

im more or less expierenced in android programming , want create app allowed access display of app or activity less app. both apps should active, should run. app shall access display data of other app (also can android system display), change bit , show again.

is possible without root rights? there android support class me? way can go? hope problem clear , can me!

ok have more detailed question: how can open app , show transparent relativelayout, can see below app?

thankyou lot

martin

if both applications yours, can access other activity using connection between them (sockets, pipes, shared files, etc.)

if you'd create overlay , display on top of other app, can using 'system window' popup. example: popup window in app

if other app arbitrary software without modifications, such thing not possible lead security issues. both applications unix processes running in own sandboxes without direct communication.