feat(cast): clicking on the notif opens specified path

android/src/main/AndroidManifest.xml

@@ -16,5 +16,12 @@
 				<action android:name="androidx.media3.session.MediaSessionService" />
 			</intent-filter>
 		</service>
+		<activity
+			android:name="dev.zoriya.omni.OmniCastTapActivity"
+			android:exported="false"
+			android:excludeFromRecents="true"
+			android:noHistory="true"
+			android:taskAffinity=""
+			android:theme="@android:style/Theme.NoDisplay" />
 	</application>
 </manifest>

android/src/main/java/dev/zoriya/omni/OmniCastOptionsProvider.kt

@@ -26,11 +26,7 @@ class OmniCastOptionsProvider : OptionsProvider {
             .setSmallIconDrawableResId(
                 androidx.media3.session.R.drawable.media3_notification_small_icon
             )
-            .apply {
-                context.packageManager.getLaunchIntentForPackage(context.packageName)
-                    ?.component?.className
-                    ?.let { setTargetActivityClassName(it) }
-            }
+            .setTargetActivityClassName(OmniCastTapActivity::class.java.name)
             .build()
 
         val mediaOptions = CastMediaOptions.Builder()

android/src/main/java/dev/zoriya/omni/OmniCastTapActivity.kt

@@ -0,0 +1,30 @@
+package dev.zoriya.omni
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.core.net.toUri
+
+class OmniCastTapActivity : Activity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val url = getSharedPreferences(OmniPlayer.OMNI_PREFS, Context.MODE_PRIVATE)
+            .getString(OmniPlayer.NOTIFICATION_URL_PREF, null)
+        val intent = url
+            ?.let { Intent(Intent.ACTION_VIEW, it.toUri()).setPackage(packageName) }
+            ?: packageManager.getLaunchIntentForPackage(packageName)
+
+        try {
+            startActivity(
+                intent?.apply {
+                    addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_SINGLE_TOP)
+                }
+            )
+        } catch (e: Throwable) {
+            android.util.Log.w("OmniPlayer", "could not open $url", e)
+        }
+        finish()
+    }
+}

android/src/main/java/dev/zoriya/omni/OmniPlayer.kt

@@ -128,6 +128,12 @@ class OmniPlayer(
 
     val player: Player = runOnMainThreadSync {
         castOptions?.receiverApplicationId?.let { receiverApplicationId = it }
+        // the cast notification outlives the app, so OmniCastTapActivity has to find the
+        // url back even when nothing of ours ran in that process yet.
+        ctx.getSharedPreferences(OMNI_PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putString(NOTIFICATION_URL_PREF, castOptions?.notificationUrl)
+            .apply()
         val cc = try {
             CastContext.getSharedInstance(ctx)
         } catch (_: Throwable) {
@@ -648,6 +654,10 @@ class OmniPlayer(
         // Receiver application id passed at runtime via OmniProvider's `cast`
         // prop; read by OmniCastOptionsProvider when the Cast SDK initializes.
         var receiverApplicationId: String? = null
+
+        // `cast.notificationUrl`, read back by OmniCastTapActivity.
+        const val OMNI_PREFS = "dev.zoriya.omni"
+        const val NOTIFICATION_URL_PREF = "notificationUrl"
     }
 }