Develop Reference

Initiate a private phone call for both side in Android app

I am building an Android app and want to initiate an anonymous phone call for both caller and receiver.
For example:
User A press 'call User B' button, and then initiate an anonymous phone call to User B. The tricky point is that both User A and B don't know each other's phone number and after the conversation, there is no record left and privacy is protected.
I don't know if native Android can do this. Could anyone give me some clues about this? Thank you very much!

According to the platform source-code there is NO WAY to place a call without the knowledge of the user. The best thing you can do is to make the call automatically but the user will see a dialog saying: "Calling XXXXXXXX" and he will have the chance to cancel it.
Even if you make your own dialer application you will have to sign it with the system key and place it in the system/apps folder in order to get the required permissions for that kind of things.
As for the call log, I don't know if you can make the call not to appear in it in the first place but I think (not sure though) that you can find it and deleted afterwards. Android informs other applications of call actions via Intents so it is relative easy to detect when a call ended and then query the call log.
Hope this helps...

Is it possible to insert custom data in phone call initialization?

I want to send some custom flag when user initiate call with other user(s). On the other side I would install app that will catch call when it is in status ringing and I want to read that flag. Basically I want to use some space within package, that is titled as free data form (that is only info I got so far).
This is going to be Android and/or iPhone app. Anything that will work.
Is it even possible?

Select Chromecast media route programmatically

I want to start chromecast routing automatically and not when the user presses the button. Does anyone know how i can simulate in any way that the user pressed the media route button? I have looked through the different classes and not found anything.
I am aware that this is not how Google intends developers to use it, and my application is only functioning as a proof of concept.
If anyone knows another way to achieve the same thing (The casting starts when the app starts, if the user has enabled it in the options menu) - let me know!

You can follow the same steps as usual (get a hold of MediaRouter instance, set a selector, register a callback, etc) but then you need to keep a list of discovered routes in your application (as they are discovered by MediaRouter; you will get a call back via onRouteAdded(()). You need to do the bookkeeping as well (via onRouteRemoved() callback). Now that you have a list of routes, you can programmatically decide which one is the one you want to use and again do as usual (same stuff that you would do when you get a callback via onRouteSelected()) except that you need to call MediaRouter.selectRoute(your_selected_route) yourself to tell the framework about it. For the first part, you can take a look at this sample.

So what I discovered was that I couldn't make a check for routes in the beginning of the program because the MediaRouter hadn't discovered them yet. (I.e the call to getRoutes returned only the default route...) In my program, it was enough to start a thread that sleeps for three seconds and then calls selects any available route:
if(mMediaRouter.getRoutes().size() >= 1) {
mMediaRouter.selectRoute(mMediaRouter.getRoutes().get(1));
}
If I needed a more persistent solution, I'd do as Ali Naddaf suggested.

Can I programmatically place an anonymous phone call?

I have an application from which a user can call another user with the click of a button.
I was wondering whether there was a way to place this call anonymously, hiding the phone number from the user and not saving it in the call history.

According to the platform source-code there is NO WAY to place a call without the knowledge of the user. The best thing you can do is to make the call automatically but the user will see a dialog saying: "Calling XXXXXXXX" and he will have the chance to cancel it.
Even if you make your own dialer application you will have to sign it with the system key and place it in the system/apps folder in order to get the required permissions for that kind of things.
As for the call log, I don't know if you can make the call not to appear in it in the first place but I think (not sure though) that you can find it and deleted afterwards. Android informs other applications of call actions via Intents so it is relative easy to detect when a call ended and then query the call log.
Hope this helps...

How to redirect on a app from a -in app- button

is it possible to press a button and start a call e.x. in skype?(i know that is possible for a telephone call but i would like to see if i can make this stuff with a voip app as skype)

If the user has skype installed, and the user tries to place a call there are two options you can take:
i.e. just try and call skype directly (but this requires knowing the correct intent to launch skype) or you request to make a call and the user will be shown the option to use skype to place the call (unless they've set the default dialer and the primary application).
I think there may be a way to get a list of activities that are registered to handle certain events (i.e. get the list of dialler apps on the device) from this you might be able to find the skype app and get enough information to force the use of that. The problem with this is you are then tied into using skype and only skype rather than let the platform handle it.