Android

A broadcast receiver is a component that responds to system-wide broadcast announcements. An Android application may be launched to process a element of data or respond to an event, such as the receipt of a text message.

A broadcast receiver is implemented as a subclass of BroadcastReceiver and each broadcast is delivered as an Intent object.

ntent messaging provides a facility for late run-time binding between components in the same or different applications.Basically Broadcast is-

1. announce application events system-wide
2. sendBroadcast
3. MyBroadcastReceiver extends BroadcastReceiver
4. RegisterReceiver (in java / in xml)

<activity …>
<intent-filter>
 <action android:name=”r4r.co.in.SHOW_DAMAGE”>
</action>
<category android:name=”android.intent.category
.DEFAULT”/>
<category android:name=”android.intent.category
.ALTERNATIVE_SELECTED”/>
 <dataandroid:mimeType=”vnd.android.cursor.item/*”/>
 </intent-filter> 
</activity>

Broadcast Receivers exclusively used to update UI