Communication between activities in Android-Broadcast Mechanism

I searched android from the Internet.
Broadcast Mechanism, used to implement communication between different activities, or message listening, mainly to implement an activity

The response of another activity in a certain state is as follows:

 

Broadcasttest
Mybroadcastreceiver;

....

// Register the message

Mybroadcastreceiver =
New broadcasttest ();

Intentfilter filter =
New intentfilter ();

Filter. addaction ("namefound ");

Registerreceiver (mybroadcastreceiver, filter );

// Internal class, after receiving the message implementation

Publicclass broadcasttest
Extends broadcastreceiver {

@ Override

Publicvoid onreceive (context arg0, intent arg1 ){

//
Todo auto-generated method stub

Getdata ();

}}

------------------------------------------------------------------------------

// Message broadcast

Intent intent = new intent ("namefound ");

Sendbroadcast (intent );

 

Note:

1. Filter. addaction ("namefound"); and intent =
New intent ("namefound ");
The parameters are consistent;

2. A message broadcast can be sent anywhere. However, if the received message is not registered, it cannot be received.

3. This is the simplest way to use, complex and not tested.