Ярослав, вот код, как Вы просили:
Midlet.java
| Код |
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
* @author Admin
*/
public class Midlet extends MIDlet implements CommandListener {
Form form;
TextField first, second; //, third;
int value1, value2, value3;
Command CMD_SOLVE;
Display display;
MIDPCanvas canvas;
boolean isPaint;
public Midlet() {
display = Display.getDisplay(this);
form = new Form("Calculator");
first = new TextField("", "", 10, 2);
second = new TextField("", "", 10, 2);
//third = new TextField("", "", 10, 2);
CMD_SOLVE = new Command("Решить", Command.OK, 1);
form.append(first);
form.append(second);
//form.append(third);
form.addCommand(CMD_SOLVE);
form.setCommandListener(this);
isPaint = false;
canvas = new MIDPCanvas(this);
}
public void commandAction(Command c, Displayable d) {
if(c == CMD_SOLVE) {
value1 = Integer.parseInt(first.getString());
value2 = Integer.parseInt(second.getString());
value3 = value1 + value2;
String value;
value = String.valueOf(value3);
isPaint = true;
display.setCurrent(canvas);
canvas.paintOtvet(value);
//third.setString(value);
//display.setCurrent(form);
}
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
}
|
MIDPCanvas.java
| Код |
import javax.microedition.lcdui.*;
/**
* @author Admin
*/
public class MIDPCanvas extends Canvas implements CommandListener {
String otv;
Midlet midlet;
Command CMD_BACK;
int screenWidth, screenHeight;
/**
* constructor
*/
public MIDPCanvas(Midlet midlet) {
this.midlet = midlet;
screenWidth = getWidth();
screenHeight = getHeight();
try {
CMD_BACK = new Command("Назад", Command.BACK, 1);
// Set up this canvas to listen to command events
setCommandListener(this);
// Создаём комманду возврата на главную форму
addCommand(CMD_BACK);
} catch(Exception e) {
e.printStackTrace();
}
}
/**
* paint
*/
public void paint(Graphics g) {
if(midlet.isPaint) {
//Заливаем экран зеленым цветом
clearGreenScreen(g);
//Устанавливаем надпись - ответ по центру
g.drawString(otv, screenWidth/2, screenHeight/2, Graphics.BASELINE|Graphics.HCENTER);
}
}
public void clearGreenScreen(Graphics g) {
int color = g.getColor();
g.setColor(0, 255, 0); //Установили зелёный цвет по системе: (красный, зелёный, синий)
g.fillRect(0, 0, screenWidth, screenHeight);
g.setColor(color);
}
public void paintOtvet(String s) {
otv = s;
repaint();
}
/**
* Called when a key is pressed.
*/
protected void keyPressed(int keyCode) {
}
/**
* Called when a key is released.
*/
protected void keyReleased(int keyCode) {
}
/**
* Called when a key is repeated (held down).
*/
protected void keyRepeated(int keyCode) {
}
/**
* Called when the pointer is dragged.
*/
protected void pointerDragged(int x, int y) {
}
/**
* Called when the pointer is pressed.
*/
protected void pointerPressed(int x, int y) {
}
/**
* Called when the pointer is released.
*/
protected void pointerReleased(int x, int y) {
}
/**
* Called when action should be handled
*/
public void commandAction(Command command, Displayable displayable) {
if(command == CMD_BACK) {
midlet.display.setCurrent(midlet.form);
}
}
}
|
|
