Intent filters are the mechanism by which activities “advertise” supported actions and data handling capabilities to the Android intent resolution process. Continuing the example in the previous section, an activity capable of displaying web pages would include an intent filter section in its manifest file indicating support for the ACTION_VIEW type of intent requests on http scheme data.
It is important to note that both the sending and receiving activities must have requested permission for the type of action to be performed. This is achieved by adding <uses-permission> tags to the manifest files of both activities. For example, the following manifest lines request permission to access the internet and contacts database:
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET"/>
The following AndroidManifest.xml file illustrates...
