show toast on main thread

Signed-off-by: alperozturk <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/it/niedermann/owncloud/notes/edit/EditNoteActivity.java

@@ -83,8 +83,10 @@ protected void onCreate(final Bundle savedInstanceState) {
                     throw new NoCurrentAccountSelectedException(EditNoteActivity.this);
                 }
             } catch (Exception e) {
-                Toast.makeText(this, R.string.no_account_configured_yet, Toast.LENGTH_LONG).show();
-                finish();
+                runOnUiThread(() -> {
+                    Toast.makeText(EditNoteActivity.this, R.string.no_account_configured_yet, Toast.LENGTH_LONG).show();
+                    finish();
+                });
             }
         }).start();