Fixed bug 1564 - SDL has no function to open a screen keyboard on Android.

Philipp Wiesemann implemented a general on-screen keyboard API for SDL, and I switched iOS code over to use it.

Xcode-iOS/Demos/src/keyboard.c

@@ -12,13 +12,6 @@
 
 static SDL_Texture *texture; /* texture where we'll hold our font */
 
-/* iPhone SDL addition keyboard related function definitions */
-extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardShow(SDL_Window * window);
-extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardHide(SDL_Window * window);
-extern DECLSPEC SDL_bool SDLCALL SDL_iPhoneKeyboardIsShown(SDL_Window *
-                                                           window);
-extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardToggle(SDL_Window * window);
-
 /* function declarations */
 void cleanup(void);
 void drawBlank(int x, int y);
@@ -296,14 +289,10 @@ main(int argc, char *argv[])
             /* draw our updates to the screen */
             SDL_RenderPresent(renderer);
             break;
-#ifdef __IPHONEOS__
         case SDL_MOUSEBUTTONUP:
-            /*      mouse up toggles onscreen keyboard visibility
-               this function is available ONLY on iPhone OS
-             */
-            SDL_iPhoneKeyboardToggle(window);
+            /*      mouse up toggles onscreen keyboard visibility */
+            SDL_ToggleScreenKeyboard(window);
             break;
-#endif
         }
     }
     cleanup();