From ae7d7dc7e8b698e927edd5f9460b97f20317f949 Mon Sep 17 00:00:00 2001
From: ibaker <ibaker@google.com>
Date: Fri, 25 Apr 2025 06:17:54 -0700
Subject: [PATCH] Enable scrubbing for local files in the demo app

Scrubbing mode doesn't really work for assets loaded over the network.

This also assumes `asset://`, `data://` and `android.resource://` URIs
are 'local' but not `content://` - because these can be loaded by any
arbitrary `ContentResolver` which may do higher latency/lower bandwidth
remote loading.

PiperOrigin-RevId: 751389438
---
 .../media3/demo/main/PlayerActivity.java      | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/demos/main/src/main/java/androidx/media3/demo/main/PlayerActivity.java b/demos/main/src/main/java/androidx/media3/demo/main/PlayerActivity.java
index 6be37323bd..f2f8b9bded 100644
--- a/demos/main/src/main/java/androidx/media3/demo/main/PlayerActivity.java
+++ b/demos/main/src/main/java/androidx/media3/demo/main/PlayerActivity.java
@@ -15,10 +15,12 @@
  */
 package androidx.media3.demo.main;
 
+import android.content.ContentResolver;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.Bundle;
+import android.text.TextUtils;
 import android.util.Pair;
 import android.view.KeyEvent;
 import android.view.View;
@@ -40,6 +42,7 @@ import androidx.media3.common.TrackSelectionParameters;
 import androidx.media3.common.Tracks;
 import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
+import androidx.media3.datasource.DataSchemeDataSource;
 import androidx.media3.datasource.DataSource;
 import androidx.media3.exoplayer.ExoPlayer;
 import androidx.media3.exoplayer.RenderersFactory;
@@ -502,6 +505,25 @@ public class PlayerActivity extends AppCompatActivity
       }
       lastSeenTracks = tracks;
     }
+
+    @OptIn(markerClass = UnstableApi.class) // For PlayerView.setTimeBarScrubbingEnabled
+    @Override
+    public void onMediaItemTransition(@Nullable MediaItem mediaItem, int reason) {
+      if (playerView == null) {
+        return;
+      }
+      if (mediaItem == null) {
+        playerView.setTimeBarScrubbingEnabled(false);
+        return;
+      }
+      String uriScheme = mediaItem.localConfiguration.uri.getScheme();
+      playerView.setTimeBarScrubbingEnabled(
+          TextUtils.isEmpty(uriScheme)
+              || uriScheme.equals(ContentResolver.SCHEME_FILE)
+              || uriScheme.equals("asset")
+              || uriScheme.equals(DataSchemeDataSource.SCHEME_DATA)
+              || uriScheme.equals(ContentResolver.SCHEME_ANDROID_RESOURCE));
+    }
   }
 
   private class PlayerErrorMessageProvider implements ErrorMessageProvider<PlaybackException> {