一个休闲类游戏的demo与记录存储
MIDlet:
imp
imp
imp
public class Main extends MIDlet {
Display display;
BallCanvas ball;
public Main() {
display = Display.getDisplay(this);
ball = new BallCanvas();
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
}
protected void pauseApp() {
ball.stop();
}
protected void startApp() throws MIDletStateChangeException {
display.setCurrent(ball);
ball.start();
}
}
Canvas:
imp
imp
imp
imp
imp
imp
imp
imp
public class BallCanvas extends Canvas implements Runnable {
RMS rms;
Thread current;
int key;
private int px, py;
private int width, height;
private int r = 30;
/**
* 伴随小球数量
*/
private int count = 0;
// -------------balls------------------
/**
* 0:状态(0静止,1伴随,2离散) <br>
* 1:x <br>
* 2:y <br>
* 3:初始角度 <br>
* 4:是否受伤 <br>
* 5:疗伤时间<br>
* 6:vx<br>
* 7:vy<br>
*/
private int[][] balls = new int[10][8];
// -------------------------------
// -------------------------------
public BallCanvas() {
setFullScreenMode(true);
rms = new RMS();
width = getWidth();
height = getHeight();
px = width >> 1;
py = height >> 1;
for (int i = 0; i < balls.length; i++) {
balls[i][1] = 45 + i * 15;
balls[i][2] = 260;
}
rms.print();
}
public byte[] encode() {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
try {
dos.writeInt(px);
dos.writeInt(py);
dos.writeInt(r);
dos.writeInt(count);
for (int i = 0; i < balls.length; i++) {
for (int j = 0; j < balls[i].length; j++) {
dos.writeInt(balls[i][j]);
}
}
} catch (Exception e) {
}
return baos.toByteArray();
}
public void decode(byte[] da
if (da
return;
}
ByteArrayInputStream bais = new ByteArrayInputStream(da
DataInputStream dis = new DataInputStream(bais);
try {
px = dis.readInt();
py = dis.readInt();
r = dis.readInt();
count = dis.readInt();
for (int i = 0; i < balls.length; i++) {
for (int j = 0; j < balls[i].length; j++) {
balls[i][j] = dis.readInt();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
public void start() {
current = new Thread(this);
current.start();
}
public void stop() {
current = null;
}
protected void paint(Graphics g) {
clear(g);
g.setColor(0xffff00);
g.fillRoundRect(px - 10, py - 10, 20, 20, 10, 10);
drawBalls(g);
}
private void drawBalls(Graphics g) {
for (int i = 0; i < balls.length; i++) {
g.setColor(0xffffff);
g.fillArc(balls[i][1] - 5, balls[i][2] - 5, 10, 10, 0, 360);
}
}
private void clear(Graphics g) {
int old = g.getColor();
g.setColor(0x00ff00);
g.fillRect(0, 0, width, height);
g.setColor(old);
}
public void run() {
while (current != null) {
input();
logic();
repaint();
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void input() {
switch (key) {
case -1:
py -= 5;
break;
case -2:
py += 5;
break;
case -3:
px -= 5;
break;
case -4:
px += 5;
break;
}
}
private void logic() {
for (int i = 0; i < balls.length; i++) {
if (balls[i][0] == 1) {
continue;
}
if (this.collise(px - 10, py - 10, 20, 20, balls[i][1] - 5,
balls[i][2] - 5, 10, 10)) {
System.out.println("peng");
balls[i][0] = 1;
count++;
int angle = 360 / count;
int m = 0;
for (int j = 0; j < balls.length; j++) {
if (balls[j][0] == 1) {
balls[j][3] = angle * m;
m++;
balls[j][1] = (int) (px + r
* Math.cos(Math.toRadians(balls[j][3])));
balls[j][2] = (int) (py - r
* Math.sin(Math.toRadians(balls[j][3])));
}
}
}
}
changeBall();
}
private void changeBall() {
for (int i = 0; i < balls.length; i++) {
switch (balls[i][0]) {
case 0:
break;
case 1:
balls[i][3] += 5;
balls[i][1] = (int) (px + r
* Math.cos(Math.toRadians(balls[i][3])));
balls[i][2] = (int) (py - r
* Math.sin(Math.toRadians(balls[i][3])));
break;
case 2:
balls[i][1] += balls[i][6];
balls[i][2] += balls[i][7];
if (balls[i][1] > width - 10 || balls[i][1] < 0) {
balls[i][6] = -balls[i][6];
}
if (balls[i][2] > height - 10 || balls[i][2] < 0) {
balls[i][7] = -balls[i][7];
}
break;
}
}
}
public boolean collise(int x1, int y1, int w1, int h1, int x2, int y2,
int w2, int h2) {
if (x1 > x2 + w2 || x2 > x1 + w1 || y1 > y2 + h2 || y2 > y1 + h1) {
return false;
}
return true;
}
public void keyReleased(int key) {
if (key == -5) {
for (int j = 0; j < balls.length; j++) {
if (balls[j][0] == 1) {
balls[j][0] = 2;
balls[j][6] = (int) (5 * Math.cos(Math
.toRadians(balls[j][3])));
balls[j][7] = (int) (-5 * Math.sin(Math
.toRadians(balls[j][3])));
}
}
count = 0;
}
if (key == KEY_NUM1) {
System.out.println("save");
rms.save(this.encode());
}
if (key == KEY_NUM3) {
System.out.println("load");
byte[] d = rms.load();
this.decode(d);
}
this.key = 0;
}
public void keyPressed(int key) {
this.key = key;
}
}
RMS:
imp
imp
imp
public class RMS {
private RecordStore rs;
private String name = "g3001";
public void open() {
try {
rs = RecordStore.openRecordStore(name, true);
} catch (RecordStoreException e) {
e.printStackTrace();
}
}
public void print() {
open();
try {
System.out.println("当前RMS的大小:" + rs.getSize());
System.out.println("当前RMS的扩充容量:" + rs.getSizeAvailable());
System.out.println("最后修改时间:" + rs.getLastModified());
System.out.println("version:" + rs.getVersion());
} catch (RecordStoreNotOpenException e) {
e.printStackTrace();
}
close();
}
public void save(byte[] da
open();
try {
if (rs.getNumRecords() == 0) {
rs.addRecord(da
} else {
rs.setRecord(1, da
}
} catch (RecordStoreException e) {
e.printStackTrace();
}
close();
}
public byte[] load() {
byte[] da
open();
try {
da
} catch (RecordStoreException e) {
e.printStackTrace();
}
close();
return da
}
public void close() {
if (rs != null) {
try {
rs.closeRecordStore();
} catch (RecordStoreException e) {
e.printStackTrace();
}
}
}
}