Also check if the Uri is built for raw resource data, and then create the RawResourceDataSource for it.

library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultDataSource.java

@@ -31,6 +31,9 @@ import java.lang.reflect.InvocationTargetException;
  *     /path/to/media/media.mp4 because the implementation assumes that a URI without a scheme is a
  *     local file URI).
  * <li>asset: For fetching data from an asset in the application's apk (e.g. asset:///media.mp4).
+ * <li>rawresource: For fetching data from a raw resource in the applications' apk
+ *     (e.g. rawresource:///resourceId, where rawResourceId is the integer identifier of the raw
+ *     resource).</li>
  * <li>content: For fetching data from a content URI (e.g. content://authority/path/123).
  * <li>rtmp: For fetching data over RTMP. Only supported if the project using ExoPlayer has an
  *     explicit dependency on ExoPlayer's RTMP extension.</li>
@@ -48,6 +51,7 @@ public final class DefaultDataSource implements DataSource {
   private static final String SCHEME_ASSET = "asset";
   private static final String SCHEME_CONTENT = "content";
   private static final String SCHEME_RTMP = "rtmp";
+  private static final String SCHEME_RAW = RawResourceDataSource.RAW_RESOURCE_SCHEME;
 
   private final Context context;
   private final TransferListener<? super DataSource> listener;
@@ -60,6 +64,7 @@ public final class DefaultDataSource implements DataSource {
   private DataSource contentDataSource;
   private DataSource rtmpDataSource;
   private DataSource dataSchemeDataSource;
+  private DataSource rawResourceDataSource;
 
   private DataSource dataSource;
 
@@ -134,6 +139,8 @@ public final class DefaultDataSource implements DataSource {
       dataSource = getRtmpDataSource();
     } else if (DataSchemeDataSource.SCHEME_DATA.equals(scheme)) {
       dataSource = getDataSchemeDataSource();
+    } else if (SCHEME_RAW.equals(scheme)) {
+      dataSource = getRawResourceDataSource();
     } else {
       dataSource = baseDataSource;
     }
@@ -213,4 +220,10 @@ public final class DefaultDataSource implements DataSource {
     return dataSchemeDataSource;
   }
 
+  private DataSource getRawResourceDataSource() {
+    if (rawResourceDataSource == null) {
+      rawResourceDataSource = new RawResourceDataSource(context, listener);
+    }
+    return rawResourceDataSource;
+  }
 }