Question

I want to create an application in which
– Create a listener which listens for outgoing/incoming messages and calls
– UI is shown/hide based on listener results

Answer 1

Shrini,

As dds stated, you will definitely need at least two BroadcastReceivers. You will need one BroadcastReceiver for each incoming call and message that you want to respond to, and one for each outgoing one as well. A BroadcastReceiver may only capture one BroadcastMessage at a time. You will specifically need to capture the Intents sent by the operating system and your Application will need to have the appropriate Permissions for each. That’s just setting up the listeners.

Once the BroadcastReceiver has been called you will need to start an Activity for you UI and possibly a Service to do any other processing. In the cases of single-point events (like messages) an Activity is often enough. Calls, however, depend largely upon what you are doing. Since a call has two distinct events, in order to tie them together, many people prefer to use a Service just to hold and watch the call.

In order to best help you, I must inform you that your question is remarkably vague as to what you need to do. Does your custom UI display information about the calls? Does it allow the User to respond or change that information? What kind of messages is your app responding to? SMS? Email? IMs? These are important because each one has different considerations.

Given that the limitation of information provided here, I would recommend researching your topic by downloading and viewing some of the open source projects stored on Google. Here is a Here.

Fuzzical Logic