Confirm show images

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

@@ -624,7 +624,12 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
                     .show();
         }
 
-        private void onShowImages(EntityMessage message) {
+        private void onShowImages(final EntityMessage message) {
+            new DialogBuilderLifecycle(context, owner)
+                    .setMessage(R.string.title_ask_show_image)
+                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
                             properties.setImages(message.id, true);
                             btnImages.setEnabled(false);
 
@@ -632,6 +637,10 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
                             args.putSerializable("message", message);
                             bodyTask.load(context, owner, args);
                         }
+                    })
+                    .setNegativeButton(android.R.string.cancel, null)
+                    .show();
+        }
 
         private SimpleTask<Spanned> bodyTask = new SimpleTask<Spanned>() {
             private String body = null;

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

@@ -224,6 +224,7 @@
     <string name="title_ask_discard">Discard draft?</string>
     <string name="title_ask_spam">Report message as spam?</string>
     <string name="title_ask_show_html">Showing the original message can leak privacy sensitive information</string>
+    <string name="title_ask_show_image">Showing images can leak privacy sensitive information</string>
     <string name="title_fix">Fix</string>
 
     <string name="title_compose">Compose</string>