diff --git a/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java b/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
index 9e0ce52328..5520248339 100644
--- a/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
+++ b/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
@@ -149,6 +149,7 @@ public final class TransformerActivity extends AppCompatActivity {
       throw new IllegalStateException(e);
     }
     informationTextView.setText(R.string.transformation_started);
+    playerView.setVisibility(View.GONE);
     Handler mainHandler = new Handler(getMainLooper());
     ProgressHolder progressHolder = new ProgressHolder();
     mainHandler.post(
@@ -285,6 +286,7 @@ public final class TransformerActivity extends AppCompatActivity {
         getString(
             R.string.transformation_completed, transformationStopwatch.elapsed(TimeUnit.SECONDS)));
     progressViewGroup.setVisibility(View.GONE);
+    playerView.setVisibility(View.VISIBLE);
     playMediaItem(MediaItem.fromUri("file://" + filePath));
     Log.d(TAG, "Output file path: file://" + filePath);
   }
diff --git a/demos/transformer/src/main/res/layout/transformer_activity.xml b/demos/transformer/src/main/res/layout/transformer_activity.xml
index 94b4484969..324ed010a2 100644
--- a/demos/transformer/src/main/res/layout/transformer_activity.xml
+++ b/demos/transformer/src/main/res/layout/transformer_activity.xml
@@ -34,10 +34,7 @@
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:orientation="vertical"
-      android:paddingLeft="8dp"
-      android:paddingRight="8dp"
-      android:paddingTop="8dp"
-      android:paddingBottom="8dp" />
+      android:padding="8dp" />
 
   </com.google.android.material.card.MaterialCardView>
 
@@ -61,8 +58,6 @@
           android:id="@+id/debug_text_view"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
-          android:paddingLeft="4dp"
-          android:paddingRight="4dp"
           android:textSize="10sp"
           tools:ignore="SmallSp"/>
 
@@ -70,28 +65,26 @@
           android:id="@+id/progress_view_group"
           android:layout_height="match_parent"
           android:layout_width="match_parent"
+          android:padding="8dp"
           android:orientation="vertical">
 
           <com.google.android.material.progressindicator.LinearProgressIndicator
             android:id="@+id/progress_indicator"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:paddingLeft="16dp"
-            android:paddingRight="16dp"
-            android:paddingTop="16dp"
-            android:paddingBottom="16dp"
+            android:layout_marginBottom="8dp"
             android:layout_gravity="center" />
 
           <TextView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
             android:text="@string/debug_preview" />
 
           <androidx.media3.ui.AspectRatioFrameLayout
             android:id="@+id/debug_aspect_ratio_frame_layout"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:paddingTop="16dp">
+            android:layout_height="match_parent">
 
             <TextView
               android:layout_width="match_parent"
diff --git a/demos/transformer/src/main/res/values/strings.xml b/demos/transformer/src/main/res/values/strings.xml
index 3c2c48c2f4..569c25bb80 100644
--- a/demos/transformer/src/main/res/values/strings.xml
+++ b/demos/transformer/src/main/res/values/strings.xml
@@ -17,7 +17,7 @@
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
   <string name="app_name" translatable="false">Transformer Demo</string>
   <string name="configuration" translatable="false">Configuration</string>
-  <string name="choose_file_title" translatable="false">Choose File</string>
+  <string name="choose_file_title" translatable="false">Choose file</string>
   <string name="remove_audio" translatable="false">Remove audio</string>
   <string name="remove_video" translatable="false">Remove video</string>
   <string name="flatten_for_slow_motion" translatable="false">Flatten for slow motion</string>
@@ -30,7 +30,7 @@
   <string name="transform" translatable="false">Transform</string>
   <string name="hdr_editing" translatable="false">[Experimental] HDR editing</string>
   <string name="debug_preview" translatable="false">Debug preview:</string>
-  <string name="debug_preview_not_available" translatable="false">No debug preview available</string>
+  <string name="debug_preview_not_available" translatable="false">No debug preview available.</string>
   <string name="transformation_started" translatable="false">Transformation started</string>
   <string name="transformation_timer" translatable="false">Transformation started %d seconds ago.</string>
   <string name="transformation_completed" translatable="false">Transformation completed in %d seconds.</string>