app/src/main/java/io/lbry/browser/ui/findcontent/FileViewFragment.java

@@ -1522,6 +1522,12 @@ public class FileViewFragment extends BaseFragment implements
                     onMainActionButtonClicked();
                 }
             });
+            root.findViewById(R.id.file_view_open_external_button).setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    openClaimExternally(claim, claim.getMediaType());
+                }
+            });
 
             if (metadata instanceof Claim.StreamMetadata) {
                 Claim.StreamMetadata streamMetadata = (Claim.StreamMetadata) metadata;
@@ -2069,6 +2075,8 @@ public class FileViewFragment extends BaseFragment implements
                     }
                     handled = true;
                 }
+            } else {
+                openClaimExternally(claim, mediaType);
             }
         }
 
@@ -2155,6 +2163,18 @@ public class FileViewFragment extends BaseFragment implements
                 "        </html>";
     }
 
+    private void openClaimExternally(Claim claim, String mediaType) {
+        File file = new File(claim.getFile().getDownloadPath());
+        Uri fileUri = Uri.parse(claim.getFile().getDownloadPath());
+
+        Intent intent = new Intent();
+        intent.setAction(Intent.ACTION_VIEW);
+        intent.setDataAndType(fileUri, mediaType.toLowerCase());
+        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        Intent chooser = Intent.createChooser(intent, getString(R.string.choose_app));
+        startActivityForResult(chooser, 419);
+    }
+
     public void showError(String message) {
         View root = getView();
         if (root != null) {

app/src/main/res/layout/fragment_file_view.xml

@@ -157,6 +157,13 @@
                         android:textFontWeight="300"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content" />
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/file_view_open_external_button"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:fontFamily="@font/inter"
+                        android:textSize="14sp"
+                        android:text="@string/open" />
                 </LinearLayout>
             </RelativeLayout>
         </RelativeLayout>

app/src/main/res/values/strings.xml

@@ -91,6 +91,7 @@
     <string name="please_select_repost_channel">Please select a channel to repost on.</string>
     <string name="reply">Reply</string>
     <string name="replying_to">Replying to %1$s</string>
+    <string name="choose_app">Choose app</string>
     <plurals name="post_and_tip">
         <item quantity="one">Post and tip %1$s credit?</item>
         <item quantity="other">Post and tip %1$s credits?</item>