4 files changed, 18 insertions, 23 deletions
diff --git a/java/src/com/android/intentresolver/contentpreview/ContentPreviewUi.java b/java/src/com/android/intentresolver/contentpreview/ContentPreviewUi.java
index fcafe752..4e343a17 100644
--- a/java/src/com/android/intentresolver/contentpreview/ContentPreviewUi.java
+++ b/java/src/com/android/intentresolver/contentpreview/ContentPreviewUi.java
@@ -35,6 +35,7 @@ import android.widget.TextView;
 
 import com.android.intentresolver.R;
 import com.android.intentresolver.widget.ActionRow;
+import com.android.intentresolver.widget.ScrollableImagePreviewView;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -122,4 +123,18 @@ abstract class ContentPreviewUi {
             }
         }
     }
+
+    protected static ScrollableImagePreviewView.PreviewType getPreviewType(
+            MimeTypeClassifier typeClassifier, String mimeType) {
+        if (mimeType == null) {
+            return ScrollableImagePreviewView.PreviewType.File;
+        }
+        if (typeClassifier.isImageType(mimeType)) {
+            return ScrollableImagePreviewView.PreviewType.Image;
+        }
+        if (typeClassifier.isVideoType(mimeType)) {
+            return ScrollableImagePreviewView.PreviewType.Video;
+        }
+        return ScrollableImagePreviewView.PreviewType.File;
+    }
 }
diff --git a/java/src/com/android/intentresolver/contentpreview/FilesPlusTextContentPreviewUi.java b/java/src/com/android/intentresolver/contentpreview/FilesPlusTextContentPreviewUi.java
index 12843e0a..e15d53c4 100644
--- a/java/src/com/android/intentresolver/contentpreview/FilesPlusTextContentPreviewUi.java
+++ b/java/src/com/android/intentresolver/contentpreview/FilesPlusTextContentPreviewUi.java
@@ -70,7 +70,7 @@ class FilesPlusTextContentPreviewUi extends ContentPreviewUi {
         boolean allVideos = true;
         for (FileInfo fileInfo : mFiles) {
             ScrollableImagePreviewView.PreviewType previewType =
-                    getPreviewType(fileInfo.getMimeType());
+                    getPreviewType(mTypeClassifier, fileInfo.getMimeType());
             allImages = allImages && previewType == ScrollableImagePreviewView.PreviewType.Image;
             allVideos = allVideos && previewType == ScrollableImagePreviewView.PreviewType.Video;
         }
@@ -180,14 +180,4 @@ class FilesPlusTextContentPreviewUi extends ContentPreviewUi {
         });
         includeText.setVisibility(View.VISIBLE);
     }
-
-    private ScrollableImagePreviewView.PreviewType getPreviewType(String mimeType) {
-        if (mTypeClassifier.isImageType(mimeType)) {
-            return ScrollableImagePreviewView.PreviewType.Image;
-        }
-        if (mTypeClassifier.isVideoType(mimeType)) {
-            return ScrollableImagePreviewView.PreviewType.Video;
-        }
-        return ScrollableImagePreviewView.PreviewType.File;
-    }
 }
diff --git a/java/src/com/android/intentresolver/contentpreview/MimeTypeClassifier.java b/java/src/com/android/intentresolver/contentpreview/MimeTypeClassifier.java
index 5172dd29..44cbd52e 100644
--- a/java/src/com/android/intentresolver/contentpreview/MimeTypeClassifier.java
+++ b/java/src/com/android/intentresolver/contentpreview/MimeTypeClassifier.java
@@ -33,6 +33,6 @@ public interface MimeTypeClassifier {
 
     /** @return whether the specified {@code mimeType} is classified as an "video" type */
     default boolean isVideoType(@Nullable String mimeType) {
-        return ClipDescription.compareMimeTypes(mimeType, "video/*");
+        return (mimeType != null) && ClipDescription.compareMimeTypes(mimeType, "video/*");
     }
 }
diff --git a/java/src/com/android/intentresolver/contentpreview/UnifiedContentPreviewUi.java b/java/src/com/android/intentresolver/contentpreview/UnifiedContentPreviewUi.java
index 8d3e6031..f0ffc65c 100644
--- a/java/src/com/android/intentresolver/contentpreview/UnifiedContentPreviewUi.java
+++ b/java/src/com/android/intentresolver/contentpreview/UnifiedContentPreviewUi.java
@@ -105,7 +105,7 @@ class UnifiedContentPreviewUi extends ContentPreviewUi {
         boolean allVideos = !mFiles.isEmpty();
         for (FileInfo fileInfo : mFiles) {
             ScrollableImagePreviewView.PreviewType previewType =
-                    getPreviewType(fileInfo.getMimeType());
+                    getPreviewType(mTypeClassifier, fileInfo.getMimeType());
             allImages = allImages && previewType == ScrollableImagePreviewView.PreviewType.Image;
             allVideos = allVideos && previewType == ScrollableImagePreviewView.PreviewType.Video;
 
@@ -153,14 +153,4 @@ class UnifiedContentPreviewUi extends ContentPreviewUi {
         }
         return actions;
     }
-
-    private ScrollableImagePreviewView.PreviewType getPreviewType(String mimeType) {
-        if (mTypeClassifier.isImageType(mimeType)) {
-            return ScrollableImagePreviewView.PreviewType.Image;
-        }
-        if (mTypeClassifier.isVideoType(mimeType)) {
-            return ScrollableImagePreviewView.PreviewType.Video;
-        }
-        return ScrollableImagePreviewView.PreviewType.File;
-    }
 }