make safe button work

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -2538,14 +2538,6 @@ public class XmppConnectionService extends Service {
 	public void pushSubjectToConference(final Conversation conference, final String subject) {
 		MessagePacket packet = this.getMessageGenerator().conferenceSubject(conference, subject);
 		this.sendMessagePacket(conference.getAccount(), packet);
-		final MucOptions mucOptions = conference.getMucOptions();
-		final MucOptions.User self = mucOptions.getSelf();
-		if (self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
-			Bundle options = new Bundle();
-			options.putString("muc#roomconfig_persistentroom", "1");
-			options.putString("muc#roomconfig_roomname", subject);
-			this.pushConferenceConfiguration(conference, options, null);
-		}
 	}
 
 	public void changeAffiliationInConference(final Conversation conference, Jid user, final MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {

src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java

@@ -14,6 +14,7 @@ import android.os.Bundle;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.widget.Toolbar;
 import android.text.SpannableStringBuilder;
+import android.util.Log;
 import android.view.ContextMenu;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -182,14 +183,6 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
             builder.create().show();
         }
     };
-    private OnValueEdited onSubjectEdited = new OnValueEdited() {
-
-        @Override
-        public String onValueEdited(String value) {
-            xmppConnectionService.pushSubjectToConference(mConversation, value.trim().isEmpty() ? null : value.trim());
-            return null;
-        }
-    };
 
     public static boolean cancelPotentialWork(User user, ImageView imageView) {
         final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
@@ -339,13 +332,41 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
             if (!owner) {
                 this.binding.mucEditSubject.requestFocus();
             }
+            this.binding.yourPhoto.setVisibility(View.GONE);
         } else {
-            this.binding.mucEditor.setVisibility(View.GONE);
+            String subject = this.binding.mucEditSubject.isEnabled() ? this.binding.mucEditSubject.getEditableText().toString().trim() : null;
-            this.binding.mucDisplay.setVisibility(View.VISIBLE);
+            String name = this.binding.mucEditTitle.isEnabled() ? this.binding.mucEditTitle.getEditableText().toString().trim() : null;
-            this.binding.editMucNameButton.setImageResource(getThemeResource(R.attr.icon_edit_body, R.drawable.ic_edit_black_24dp));
+            onMucInfoUpdated(subject, name);
+            hideEditor();
         }
     }
 
+    private void hideEditor() {
+        this.binding.mucEditor.setVisibility(View.GONE);
+        this.binding.mucDisplay.setVisibility(View.VISIBLE);
+        this.binding.editMucNameButton.setImageResource(getThemeResource(R.attr.icon_edit_body, R.drawable.ic_edit_black_24dp));
+        this.binding.yourPhoto.setVisibility(View.VISIBLE);
+    }
+
+    private void onMucInfoUpdated(String subject, String name) {
+        final MucOptions mucOptions = mConversation.getMucOptions();
+        if (mucOptions.canChangeSubject() && !blankOnNull(mucOptions.getSubject()).equals(subject)) {
+            Log.d(Config.LOGTAG,"subject changed");
+            xmppConnectionService.pushSubjectToConference(mConversation, subject);
+        }
+        if (mucOptions.getSelf().getAffiliation().ranks(MucOptions.Affiliation.OWNER) && !blankOnNull(mucOptions.getName()).equals(name)) {
+            Log.d(Config.LOGTAG,"name changed");
+            Bundle options = new Bundle();
+            options.putString("muc#roomconfig_persistentroom", "1");
+            options.putString("muc#roomconfig_roomname", name);
+            xmppConnectionService.pushConferenceConfiguration(mConversation, options, null);
+        }
+    }
+
+    private static String blankOnNull(String input) {
+        return input == null ? "" : input;
+    }
+
     @Override
     protected String getShareableUri(boolean http) {
         if (mConversation != null) {
@@ -558,6 +579,15 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
         }
     }
 
+    @Override
+    public void onBackPressed() {
+        if (this.binding.mucEditor.getVisibility() == View.VISIBLE) {
+            hideEditor();
+        } else {
+            super.onBackPressed();
+        }
+    }
+
     private void updateView() {
         invalidateOptionsMenu();
         final MucOptions mucOptions = mConversation.getMucOptions();

src/main/res/layout/activity_muc_details.xml

@@ -46,15 +46,15 @@
                                 android:layout_width="72dp"
                                 android:layout_height="72dp"
                                 android:layout_alignParentStart="true"
-                                app:riv_corner_radius="2dp"/>
+                                app:riv_corner_radius="2dp"
+                                android:layout_marginEnd="@dimen/avatar_item_distance"/>
 
                             <LinearLayout
                                 android:layout_width="fill_parent"
                                 android:layout_height="wrap_content"
                                 android:layout_alignParentTop="true"
                                 android:layout_toEndOf="@+id/your_photo"
-                                android:orientation="vertical"
+                                android:orientation="vertical">
-                                android:paddingStart="@dimen/avatar_item_distance">
 
                                 <RelativeLayout
                                     android:layout_width="match_parent"