try a more generic mime type if a file cannot be open by anything

app/src/main/java/com/simplemobiletools/filemanager/fragments/ItemsFragment.java

@@ -113,17 +113,38 @@ public class ItemsFragment extends android.support.v4.app.Fragment
             try {
                 startActivity(intent);
             } catch (ActivityNotFoundException e) {
-                Utils.showToast(getContext(), R.string.no_app_found);
+                if (!tryGenericMimeType(intent, mimeType, file)) {
+                    Utils.showToast(getContext(), R.string.no_app_found);
+                }
             }
         }
     }
 
+    private boolean tryGenericMimeType(Intent intent, String mimeType, File file) {
+        final String genericMimeType = getGenericMimeType(mimeType);
+        intent.setDataAndType(Uri.fromFile(file), genericMimeType);
+        try {
+            startActivity(intent);
+            return true;
+        } catch (ActivityNotFoundException e) {
+            return false;
+        }
+    }
+
     @Override
     public void onRefresh() {
         fillItems();
         mSwipeRefreshLayout.setRefreshing(false);
     }
 
+    private String getGenericMimeType(String mimeType) {
+        if (!mimeType.contains("/"))
+            return mimeType;
+
+        final String type = mimeType.substring(0, mimeType.indexOf("/"));
+        return type + "/*";
+    }
+
     public interface ItemInteractionListener {
         void itemClicked(String path);
     }