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  • java me 旋转的X案例

    package com.xushouwei.cn;

    import javax.microedition.lcdui.Command;
    import javax.microedition.lcdui.CommandListener;
    import javax.microedition.lcdui.Display;
    import javax.microedition.lcdui.Displayable;
    import javax.microedition.lcdui.Graphics;
    import javax.microedition.lcdui.game.GameCanvas;
    import javax.microedition.midlet.MIDlet;
    import javax.microedition.midlet.MIDletStateChangeException;

    public class SimpleGameDemo extends MIDlet implements CommandListener{

    private Command exitCommand;
    private SimpleGameCanvas sg;
    public SimpleGameDemo()
    {
    exitCommand=new Command("Exit",Command.EXIT,1);
    sg=new SimpleGameCanvas();
    sg.addCommand(exitCommand);
    sg.setCommandListener(this);
    Display.getDisplay(this).setCurrent(sg);

    }

    public void commandAction(Command c, Displayable d) {
    // TODO Auto-generated method stub
    if(c==exitCommand)
    {
    try {
    destroyApp(false);
    } catch (Exception e) {
    // TODO: handle exception
    e.printStackTrace();
    }
    notifyDestroyed();
    }


    }

    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

    }

    }

    class SimpleGameCanvas extends GameCanvas implements Runnable
    {

    //private static boolean suppressKeyEvents;
    private boolean mTrucking;
    private long mFrameDelay;
    private int mX,mY;
    private int mState;

    public SimpleGameCanvas() {
    super(true);
    // TODO Auto-generated constructor stub
    mX=getWidth()/2;
    mY=getHeight()/2;
    mState=0;
    mFrameDelay=20;
    start();
    }

    public void start()
    {
    mTrucking=true;
    Thread t=new Thread(this);
    t.start();
    }
    public void stop()
    {
    mTrucking=false;
    }


    public void run() {
    // TODO Auto-generated method stub
    Graphics g=getGraphics();
    while(mTrucking==true)
    {
    tick();
    input();
    render(g);
    try {
    Thread.sleep(mFrameDelay);
    } catch (Exception e) {
    // TODO: handle exception
    e.printStackTrace();
    }
    }


    }
    public void tick()
    {
    mState=(mState+1)%20;
    }

    public void input()
    {
    int keyStates=getKeyStates();
    if((keyStates&LEFT_PRESSED)!=0)
    {
    mX=Math.max(0, mX-1);
    }
    if((keyStates&RIGHT_PRESSED)!=0)
    {
    mX=Math.min(getWidth(), mX+1);
    }
    if((keyStates&UP_PRESSED)!=0)
    {
    mY=Math.max(0, mY-1);
    }
    if((keyStates&DOWN_PRESSED)!=0)
    {
    mY=Math.min(getHeight(), mY+1);
    }
    }

    public void render(Graphics g)
    {
    g.setColor(0xffffff);
    g.fillRect(0, 0, getWidth(), getHeight());
    g.setColor(0x0000ff);
    g.drawLine(mX, mY, mX-10+mState, mY-10);
    g.drawLine(mX, mY, mX+10, mY-10+mState);
    g.drawLine(mX, mY, mX+10-mState, mY+10);
    g.drawLine(mX, mY, mX-10, mY+10-mState);
    flushGraphics();
    }
    }

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  • 原文地址:https://www.cnblogs.com/Jasxu/p/java_me_X.html
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