Use a generic filename for unknown filename links to download

app/build.gradle

@@ -32,7 +32,7 @@ dependencies {
     // Add entry to be able to use androidx.core.content.FileProvider to use Provider for file upload of camera capture on Android >= 30
     implementation 'androidx.core:core:1.10.1'
 
-    // Add swiper
+    // Add swiper to allow to refresh of a web page with a screen swipe bottom
     implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"
 
     // To be able to use CardView so we can add shadow arround images

app/src/main/java/com/nltechno/dolidroidpro/SecondActivity.java

@@ -1956,7 +1956,14 @@ public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request
 	        {
 				String query=Uri.parse(url).getQuery();
 				if (query != null) {
-                    query = query.replaceAll(".*file=", "").replaceAll("&.*", "").replaceAll(".*/", "");
+                    // Example:
+                    // query=file=myfilename.ext&...&output=file
+                    // query=format=ical&...&output=file
+                    query = query.replaceAll(".*file=", "file=").replaceAll("&.*", "").replaceAll(".*/", "");
+                    if (!query.startsWith("file=")) {
+                        // The parameter file=myfilename.ext was not provided so we use a generic file name
+                        query = "Unknown-filename";
+                    }
                 }
 				Log.d(LOG_TAG, "shouldOverrideUrlLoading Start activity to download file="+query);
 				/*Pattern p = Pattern.compile("file=(.*)\.(pdf|odt|ods)");