android: fix directory listing, keyboard show/hide and read chars

engine/app_events.cpp

@@ -1,6 +1,11 @@
 #include "pch.h"
 #include "app.h"
 
+#ifdef __ANDROID__
+void displayKeyboard(android_app* mApplication, bool pShow);
+#endif
+
+
 using namespace ui;
 
 void App::resize(float w, float h)
@@ -14,17 +19,23 @@ void App::resize(float w, float h)
 
 void App::showKeyboard()
 {
+    LOG("show keyboard");
     redraw = true;
 #ifdef __IOS__
     [ios_view becomeFirstResponder];
+#elif __ANDROID__
+    displayKeyboard(and_app, true);
 #endif
 }
 
 void App::hideKeyboard()
 {
+    LOG("hide keyboard");
     redraw = true;
 #ifdef __IOS__
     [ios_view resignFirstResponder];
+#elif __ANDROID__
+    displayKeyboard(and_app, false);
 #endif
 }