Hello all...first-time poster here, and I was wondering if any of you fine folk can help me out with what is surely a simple task, but something very confusing for someone just starting off with Java.
In a nutshell, I am creating a simple mobile game where a user is directed to tap on randomly flashing squares (through their touch screen), thus earning a score with each successful tap of a generated square. The GUI of the game itself is very barebones, with 2 options on the bottom of the screen, which are "Exit" and "Stop". What I am stuck on is the actual syntax needed to have it so that when a user taps on the "Stop" button, the game itself ends, and the "Stop" button then switches to a "Start" option where by tapping that, the game begins anew. As it stands, I'm a little perplexed here as to how this can be achieved...I have tried a few things here and there, but nothing seems to actually stop the game when hitting the "Stop" button. I have attached a screenshot of the game in action so it can give a better visual cue as to what this is all about.
Here is the code I have jumbled up thus far...I am sure it's as sloppy as can be, so excuse the messiness:
package dotsmasher;
import java.util.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class DotSmasher extends MIDlet implements
CommandListener{
private Timer timer;
private DotSmasherCanvas canvas;
private DotSmasherTimerTask task;
private Display display;
private Command exit;
private Command stop;
private Command start;
public DotSmasher(){
canvas = new DotSmasherCanvas();
timer = new Timer();
task = new DotSmasherTimerTask(canvas);
exit = new Command("Exit", Command.EXIT, 1);
stop = new Command("Stop", Command.STOP, 2);
start=new Command("Start", Command.ITEM, 1);
}
public void startApp() {
display = Display.getDisplay(this);
canvas.addCommand(exit);
canvas.addCommand(stop);
canvas.setCommandListener(this);
display.setCurrent(canvas);
timer.schedule(task, 0, 1500);
}
public void pauseApp() {
}
public void stop() {
}
private void addCommand(Command start) {
}
private void removeCommand(Command stop) {
}
private void pauseApp(boolean b) {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Exit")) {
destroyApp(true);
}
else if(c==stop) {
canvas.removeCommand(stop);
canvas.addCommand(start);
}
else if(c==start) {
canvas.removeCommand(start);
canvas.addCommand(stop);
}
}
}package dotsmasher;
import java.util.*;
public class DotSmasherTimerTask extends TimerTask{
private DotSmasherCanvas canvas;
DotSmasherTimerTask(DotSmasherCanvas canvas){
this.canvas = canvas;
}
public void run() {
canvas.moveDot();
canvas.repaint();
}
}package dotsmasher;
import javax.microedition.lcdui.*;
import java.util.Random;
class DotSmasherCanvas extends Canvas {
private int dotX,dotY;// the coordinates of the dot
private int score;
public int getDotX() {
return dotX;
}
public void setDotX(int dotX) {
this.dotX = dotX;
}
public int getDotY() {
return dotY;
}
public void setDotY(int dotY) {
this.dotY = dotY;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public DotSmasherCanvas(){
moveDot();
}
protected void paint(Graphics g) {
g.fillRect(0, 0, getWidth(), getHeight());//clear the screen
g.setColor(0xff0000); // choose your color! Red
g.fillRect(getDotX(),getDotY(),20,20);
g.drawString("Score: " + score, 10, g.getClipHeight()-20, 0);
}
protected void pointerReleased(int x, int y) {
if(detectHit(x,y)){
score += 1;
repaint();
}
}
protected boolean detectHit(int x, int y){
if((x>=dotX&&x<=dotX+20)&&(y>=dotY&&y<=dotY+20)){
//we have a hit
return true;
}
return false;
}
protected void moveDot(){
//create 2 random numbers
//assign the new numbers to dotX, dotY
Random generator = new Random();
generator.setSeed(System.currentTimeMillis());
int w = getWidth()-20;
int h = getHeight()-40;//to avoid covering score
float f = generator.nextFloat();
dotX = (int)(f*w)%w;
f = generator.nextFloat();
dotY = (int)(f*h)%h;
}
public void stop() {
}
}I very much appreciate any insight you may be able to give on this!
