Cleaning

app/src/main/java/fr/utc/simde/payutc/tools/Dialog.java

@@ -25,6 +25,8 @@ public class Dialog {
     public void dismiss() {
         if (this.alertDialog != null)
             this.alertDialog.dismiss();
+
+        this.alertDialog = null;
     }
 
     public Boolean isShowing() { return this.alertDialog != null && this.alertDialog.isShowing(); }

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

@@ -2,5 +2,5 @@
 <resources>
     <color name="colorPrimary">#3F51B5</color>
     <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
+    <color name="colorAccent">#FF9F3F</color>
 </resources>