Android-Broadcast Receiver and Intent Filter

Question

I am new to android platform.please help me out how the Broadcast Receiver and Intent Filter behaves in android.please explain in simple line or with example.thanks in adv

Answer 1

A BroadcastReceiver can be registered in two ways: dynamic or static. Static is nothing but declaring the action through an intent-filter in AndroidManifest.xml to register a new BroadcastReceiver class. Dynamic is registering the receiver from within another class. An intent-filter determines which action should be received.

To create a BroadcastReceiver, you have to extend the BroadcastReceiver class and override onReceive(Context,Intent) method. Here you can check the incoming intent with Intent.getAction() and execute code accordingly.

As a new class, static would be

public class Reciever1 extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) { 
        String str = intent.getAction();
        if(str.equalsIgnoreCase("HELLO1")) {
            Log.d("Abrar", "reciever....");             
            new Thread() {
                public void run() {                     
                    Log.d("Abrar", "reciever....");
                    System.out.println("Abrar");                        
                }
            }.start();                          
        }

or, if placed inside an existing class, it is called dynamically with

intentFilter = new IntentFilter();
intentFilter.addAction("HELLO1");

//---register the receiver---
registerReceiver(new Reciever1(), intentFilter);