How is deep linking implemented and handled within applications?

Deep links in Android allow opening specific screens of an app directly via URL or URI.

Implementation and handling:

1. Declaring intent filters in the manifest: In AndroidManifest.xml, specify intent filters with the required schemes and paths for the relevant Activity, for example:

   <intent-filter>
       <action android:name="android.intent.action.VIEW" />
       <category android:name="android.intent.category.DEFAULT" />
       <category android:name="android.intent.category.BROWSABLE" />
       <data android:scheme="https" android:host="example.com" android:pathPrefix="/product" />
   </intent-filter>
   

2. Handling the received URI in the Activity: In the onCreate or onNewIntent method, extract the Intent and its data:

   Uri data = getIntent().getData();
   if (data != null) {
       // Parse URI and navigate within the app
   }
   

3. Navigation within the app: Based on URI parameters, the app opens the corresponding screen or performs the necessary action.

Thus, deep links enable users to navigate directly to specific content within the app, enhancing UX and integration with external resources.