How to input user texts?

import android.app.AlertDialog;
import android.widget.EditText;
import android.content.DialogInterface;

class SystemAndroid {
	public static AlertDialog.Builder alert;
	public static EditText input;
	public static String inputString = "";
	public static Boolean _InputIsVisible=false;
   
        static void showEditDialog(String value)
        {
               alert = new AlertDialog.Builder(BBAndroidGame._androidGame._activity);
                input = new EditText(BBAndroidGame._androidGame._activity);
		input.setText(value);
		input.setSingleLine();
                  alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                                inputString = input.getText().toString();
                                _InputIsVisible=false;
                        }
                });
               alert.setView(input);
               _InputIsVisible=true;
               alert.show();
        }

       
        static String getInputString()
        {
                return inputString;
        }
        
        static Boolean inputIsVisible() {
		return _InputIsVisible;
	}

}

Strict
Import mojo
Import "MyJava.java"

Extern
	Function ShowEditDialog:Void(value:String) = "SystemAndroid.showEditDialog"
	Function GetInputString:String()="SystemAndroid.getInputString"
	Function InputIsVisible:Bool()="SystemAndroid.inputIsVisible"
Public


Class Game Extends App

	Field Input$="", WasVisible%=False

	Method OnCreate%()
		SetUpdateRate 10
		Return 0
	End	


	Method OnUpdate%()
		If KeyHit(KEY_ESCAPE) OnBack()
		If TouchHit(0)
			 ShowEditDialog Input
		Endif
		If WasVisible=True And InputIsVisible()=False
			Input=GetInputString()
		Elseif InputIsVisible()=True
			WasVisible=True
		Endif
		Return 0
	End	


	Method OnRender%()
		Cls
		Scale 2,2
		DrawText "V 09   " + Millisecs(),0,30
		DrawText "java!" + GetInputString() +"!",0,60
		DrawText "monk!" + Input +"!",0,90
		Return 0
	End	
	
	
	Method OnBack%()
		EndApp()
		Return 0
	End
End	

Function Main%()
	New Game
	Return 0
End