v0.7.5: decoupled android-based text input from SPD-classes

SPD-classes/src/main/java/com/watabou/utils/PlatformSupport.java

@@ -26,5 +26,14 @@ public abstract class PlatformSupport {
 	public abstract void updateDisplaySize();
 	
 	public abstract void updateSystemUI();
+	
+	//FIXME this is currently used because no platform-agnostic text input has been implemented.
+	//should look into doing that using either plain openGL or Libgdx's libraries
+	public abstract void promptTextInput( String title, String hintText, int maxLen, boolean multiLine,
+	                             String posTxt, String negTxt, TextCallback callback);
+	
+	public static abstract class TextCallback {
+		public abstract void onSelect( boolean positive, String text );
+	}
 
 }