In my application, when the user clicks Add Contact I call the Contacts application using a Intent .
But, instead, would it be possible to open a Fragment whose content would be the Contacts application itself, ie show the contacts application within my app?
No "root" phones:
Unfortunately, you can not display an application within your application without your phone having the root (permission) permission, because you can only interact with other applications via Intent . As long as developers decide how their applications should react on specific%%, doing something like this is almost impossible.
For "root" phones:
1) You can display a list of all installed applications by doing this:
getPackageManager().getInstalledApplications(PackageManager.GET_META_DATA);
2) If the user selects an application, you can run it via Intents and create Intent to capture all key events . You can find a way to do this here >. Store all x / y events of these events.
3) You can recreate events using system overlay .
4) Now comes the part that you need a device with access MotionEvent#obtain (the permission root ). Run the app and inject all events in order for your macro to run. Example:
Instrumentation mInstrumentation = new Instrumentation();
mInstrumentation.sendPointerSync(motionEvent);
You can find more information about injections here .
5) If you need help compiling your application, these two links will help you: How to compile Android Application with system permissions and Android INJECT_EVENTS permission
SUMMARY:
It is possible to display an application within your own, but the chance of your users having a device with access INJECT_EVENTS is very remote, and its application is considered as risk.
Reference: