graphical exception [temporary solution]

performance fixes
minor changes

Exception.h

@@ -4,6 +4,10 @@
 #include <exception>
 #include <string>
 
+#ifdef ANDROID
+#include <QMessageBox>
+#endif
+
 class Exception : public std::exception {
 
 private:
@@ -14,7 +18,14 @@ private:
 public:
 
 	/** ctor */
-	Exception(const std::string& str) : str(str) {;}
+	Exception(const std::string& str) : str(str) {
+
+		// TODO better solution?
+        #ifdef ANDROID
+		QMessageBox::question(nullptr, "Exception", str.c_str(), QMessageBox::Ok);
+        #endif
+
+	}
 
 	const char* what() const throw() {return str.c_str();}