Improved error handling

app/src/main/java/eu/faircode/email/ActivityView.java

@@ -1376,8 +1376,10 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
                 long id = args.getLong("id");
                 Uri uri = args.getParcelable("uri");
 
-                if ("file".equals(uri.getScheme()))
+                if ("file".equals(uri.getScheme())) {
+                    Log.w("Save attachment uri=" + uri);
                     throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+                }
 
                 File file = EntityAttachment.getFile(context, id);
 

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -1112,8 +1112,10 @@ public class FragmentCompose extends FragmentEx {
 
     private static EntityAttachment addAttachment(Context context, long id, Uri uri,
                                                   boolean image) throws IOException {
-        if ("file".equals(uri.getScheme()))
+        if ("file".equals(uri.getScheme())) {
+            Log.w("Add attachment uri=" + uri);
             throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+        }
 
         EntityAttachment attachment = new EntityAttachment();
 
@@ -1661,7 +1663,11 @@ public class FragmentCompose extends FragmentEx {
 
         @Override
         protected void onException(Bundle args, Throwable ex) {
-            Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
+            // External app sending absolute file
+            if (ex instanceof IllegalArgumentException)
+                Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
+            else
+                Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
         }
     };
 

app/src/main/java/eu/faircode/email/FragmentSetup.java

@@ -1009,8 +1009,10 @@ public class FragmentSetup extends FragmentEx {
                 Uri uri = args.getParcelable("uri");
                 String password = args.getString("password");
 
-                if ("file".equals(uri.getScheme()))
+                if ("file".equals(uri.getScheme())) {
+                    Log.w("Export uri=" + uri);
                     throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+                }
 
                 OutputStream out = null;
                 try {
@@ -1113,8 +1115,10 @@ public class FragmentSetup extends FragmentEx {
                 Uri uri = args.getParcelable("uri");
                 String password = args.getString("password");
 
-                if ("file".equals(uri.getScheme()))
+                if ("file".equals(uri.getScheme())) {
+                    Log.w("Import uri=" + uri);
                     throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+                }
 
                 InputStream in = null;
                 try {