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发表时间：2011-04-15
最后修改：2011-04-15
本次会详细讲解将Android的Snake Sample移植到J2ME上，从而比较二者的区别和联系。 package com.deaboway.j2me;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class MyMidlet extends MIDlet {
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
protected void startApp() throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
}
package com.deaboway.android;
import android.app.Activity;
import android.os.Bundle;
public class myActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
}
}
Display d = getWindowManager().getDefaultDisplay(); screenWidth = d.getWidth(); screenHeight = d.getHeight();
int clipX = g.getClipX(); int clipY = g.getClipY(); int clipWidth = g.getClipWidth(); int clipHeight = g.getClipHeight(); g.clipRect(x, y, width, height); g.setClip(clipX, clipY, clipWidth, clipHeight);//释放当前状态
canvas.save();//保存当前状态 canvas.clipRect(x,y, x+width, y+height) cavnas.resave();//释放当前状态
g.setColor(Color.WHITE); g.fillRect(0,0,getWidth(),getHeight());
// 首先定义paint Paint paint = new Paint(); // 绘制矩形区域-实心矩形 // 设置颜色 paint.setColor(Color.WHITE); // 设置样式-填充 paint.setStyle(Style.FILL); // 绘制一个矩形 canvas.drawRect(new Rect(0, 0, getWidth(), getHeight()), paint);
Image bufImage=Image.createImage(bufWidth, bufHeight); Graphics bufGraphics=bufImage.getGraphics();
Bitmap carBuffer = Bitmap.createBitmap(bufWidth, bufHeight, Bitmap.Config.ARGB_4444); Canvas carGp = new Canvas(carBuffer);
Player s=Manager.createPlayer(InputStream); s.prepare();//创建 s.start();//播放 s.stop();//暂停 s.stop();//关闭 s.release();//释放
private void initSnakeView() {
// 获取图片资源
try {
imageRED_STAR = Image.createImage("/redstar.png");
imageRED_STAR = Utils.zoomImage(imageRED_STAR,mTileSize,mTileSize);
imageYELLOW_STAR = Image.createImage("/yellowstar.png");
imageYELLOW_STAR = Utils.zoomImage(imageYELLOW_STAR,mTileSize,mTileSize);
imageGREEN_STAR = Image.createImage("/greenstar.png");
imageGREEN_STAR = Utils.zoomImage(imageGREEN_STAR,mTileSize,mTileSize);
} catch(Exception e) {
Log.info("Create Images: "+e);
}
// 设置贴片图片数组
resetTiles(4);
// 把三种图片存到Bitmap对象数组
loadTile(RED_STAR, imageRED_STAR);
loadTile(YELLOW_STAR, imageYELLOW_STAR);
loadTile(GREEN_STAR, imageGREEN_STAR);
}
// 坐标数组转整数数组，把Coordinate对象的x y放到一个int数组中——用来保存状态
private String coordVectorToString(Vector cvec) {
int count = cvec.size();
StringBuffer rawArray = new StringBuffer();
for (int index = 0; index < count; index++) {
Coordinate c = (Coordinate) cvec.elementAt(index);
rawArray.append(c.x+",");
rawArray.append(c.y+",");
Log.info("coordVectorToString(), c.x="+c.x+",c.y="+c.y);
}
Log.info("coordVectorToString(), rawArray.toString="+rawArray);
return rawArray.toString();
}
// 整数数组转坐标数组，把一个int数组中的x y放到Coordinate对象数组中——用来恢复状态
// @J2ME 还是用Vector替换ArrayList
private Vector coordStringToVector(String raw) {
Vector coordArrayList = new Vector();
Log.info("coordStringToVector(), raw="+raw);
String[] rawArray = Utils.splitUtil(raw,",");
Log.info("coordStringToVector(), rawArray.length="+rawArray.length);
int coordCount = rawArray.length;
for (int index = 0; index < coordCount; index += 2) {
Coordinate c = new Coordinate(Integer.parseInt(rawArray[index]), Integer.parseInt(rawArray[index + 1]));
coordArrayList.addElement(c);
}
return coordArrayList;
}
/**
* <p>Title: Snake</p>
* <p>Copyright: (C) 2011 Gavin's Snake project. Licensed under the Apache License, Version 2.0 (the "License")</p>
* @author Gavin
*/
package com.deaboway.snake.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import javax.microedition.rms.RecordStore;
public class Bundle extends BaseRMS {
private static String[] SECTION = {
"\"AL\":","\"DT\":",
"\"ND\":","\"MD\":",
"\"SC\":","\"ST\":"};
private static int LEN = SECTION.length;
private static boolean inited = false;
private static Bundle INSTANCE;
public static void INIT(){
if(inited)return;
inited = true;
INSTANCE = new Bundle();
INSTANCE.loadBundles();
}
public static Bundle getInstance(){
return INSTANCE;
}
private String[] CONTENT = new String[LEN];
private Bundle() {
super("snake-view");
}
public void loadBundles() {
try {
this.open();
this.close();
} catch (Exception e) {
try {
this.close();
RecordStore.deleteRecordStore(this.getRMSName());
this.open();
this.close();
} catch (Exception ex) {
}
}
}
public void resetBundles() {
try {
this.close();
RecordStore.deleteRecordStore(this.getRMSName());
this.open();
this.close();
} catch (Exception ex) {
}
}
public void updateBundles() throws Exception {
try {
this.openonly();
updateData();
if (this.getRecordStore() != null)
this.close();
} catch (Exception e) {
throw new Exception(this.getRMSName() + "::updateBundles::" + e);
}
}
protected void loadData() throws Exception {
try {
byte[] record = this.getRecordStore().getRecord(1);
DataInputStream istream = new DataInputStream(
new ByteArrayInputStream(record, 0, record.length));
String content = istream.readUTF();
int[] start = new int[LEN+1];
for(int i =0;i<LEN;i++){
start[i] = content.indexOf(SECTION[i]);
}
start[LEN]=content.length();
for(int i =0;i<LEN;i++){
CONTENT[i] = content.substring(start[i]+5,start[i+1]);
Log.info("CONTENT["+i+"]="+CONTENT[i]);
}
} catch (Exception e) {
throw new Exception(this.getRMSName() + "::loadData::" + e);
}
}
protected void createDefaultData() throws Exception {
try {
ByteArrayOutputStream bstream = new ByteArrayOutputStream(12);
DataOutputStream ostream = new DataOutputStream(bstream);
CONTENT[0] = "9,20,9,7";
CONTENT[1] = "1";
CONTENT[2] = "1";
CONTENT[3] = "600";
CONTENT[4] = "0";
CONTENT[5] = "7,7,6,7,5,7,4,7,3,7,2,7";
StringBuffer sb = new StringBuffer();
for(int i=0;i<LEN;i++){
sb.append(SECTION[i]);
sb.append(CONTENT[i]);
}
ostream.writeUTF( sb.toString());
ostream.flush();
ostream.close();
byte[] record = bstream.toByteArray();
this.getRecordStore().addRecord(record, 0, record.length);
} catch (Exception e) {
throw new Exception(this.getRMSName() + "::createDefaultData::" + e);
}
}
protected void updateData() throws Exception {
try {
ByteArrayOutputStream bstream = new ByteArrayOutputStream(12);
DataOutputStream ostream = new DataOutputStream(bstream);
StringBuffer sb = new StringBuffer();
for(int i=0;i<LEN;i++){
sb.append(SECTION[i]);
sb.append(CONTENT[i]);
}
ostream.writeUTF(sb.toString());
ostream.flush();
ostream.close();
byte[] record = bstream.toByteArray();
this.getRecordStore().setRecord(1, record, 0, record.length);
} catch (Exception e) {
throw new Exception(this.getRMSName() + "::updateData::" + e);
}
}
public String getValue(int key) {
return CONTENT[key];
}
public void setValue(int key, String value) {
CONTENT[key] = value;
}
}
/**
* <p>Title: Snake</p>
* <p>Copyright: (C) 2011 Gavin's Snake project. Licensed under the Apache License, Version 2.0 (the "License")</p>
* @author Gavin
*/
package com.deaboway.snake.util;
public class Log{
private static final int FATAL = 0;
private static final int ERROR = 1;
private static final int WARN = 2;
private static final int INFO = 3;
private static final int DEBUG = 4;
private static int LOG_LEVEL = INFO;
public static void info(String string){
if(LOG_LEVEL >= INFO){
System.out.println("[Deaboway][ INFO] " + string);
}
}
public static void debug(String string){
if(LOG_LEVEL >= DEBUG){
System.out.println("[Deaboway][DEBUG] " + string);
}
}
public static void warn(String string){
if(LOG_LEVEL >= WARN){
System.out.println("[Deaboway][ WARN] " + string);
}
}
public static void error(String string){
if(LOG_LEVEL >= ERROR){
System.out.println("[Deaboway][ERROR] " + string);
}
}
public static void fatal(String string){
if(LOG_LEVEL >= FATAL){
System.out.println("[Deaboway][FATAL] " + string);
}
}
}
class RefreshHandler extends Thread {
public void run() {
while (true) {
try {
//delay一个延迟时间单位
Thread.sleep(mMoveDelay);
} catch (Exception e) {
e.printStackTrace();
}
// 更新View对象
SnakeView.this.update();
// 强制重绘
SnakeView.this.repaint();
}
}
};
/**
* <p>Title: Snake</p>
* <p>Copyright: (C) 2011 Gavin's Snake project. Licensed under the Apache License, Version 2.0 (the "License")</p>
* @author Gavin
*/
package com.deaboway.snake;
import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import com.deaboway.snake.util.BaseRMS;
import com.deaboway.snake.util.Bundle;
import com.deaboway.snake.util.Log;
/**
* Snake: a simple game that everyone can enjoy.
*
* 贪吃蛇： 经典游戏，在一个花园中找苹果吃，吃了苹果会变长，速度变快。碰到自己和墙就挂掉
*
*/
public class Snake extends MIDlet {
public static Display display;
public static SnakeView mSnakeView;
public static MIDlet SNAKE;
public Snake() {
Bundle.INIT();
display=Display.getDisplay(this);
SNAKE = this;
mSnakeView = new SnakeView();
mSnakeView.setTextView("");
mSnakeView.setMode(SnakeView.READY);
display.setCurrent(mSnakeView);
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
mSnakeView.saveState();
}
protected void pauseApp() {
mSnakeView.setMode(SnakeView.PAUSE);
}
protected void startApp() throws MIDletStateChangeException {
// 检查存贮状态以确定是重新开始还是恢复状态
Log.debug("startApp(), BaseRMS.FIRST="+BaseRMS.FIRST);
if (BaseRMS.FIRST) {
// 存储状态为空，说明刚启动可以切换到准备状态
mSnakeView.setMode(SnakeView.READY);
} else {
// 已经保存过，那么就去恢复原有状态
// 恢复状态
if (!mSnakeView.restoreState()) {
// 恢复状态不成功，设置状态为暂停
mSnakeView.setMode(SnakeView.PAUSE);
}
}
}
}
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发表时间：2011-04-26
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发表时间：2011-04-26
archangelwin 写道 期待中
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