读取手机系统属性源代码

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class DetectMIDlet extends MIDlet {

private static DetectMIDlet instance = null;
private Display display = null;
private Displayable form = null;

public DetectMIDlet() {
instance = this;
}

protected void startApp() {
if(display==null) {
// 首次启动应用程序
display = Display.getDisplay(this);
form = new TestForm();
display.setCurrent(form);
} else{
display.setCurrent(form);
}
}

protected void pauseApp() {}

protected void destroyApp(boolean unconditional) {}

public static void quitApp() {
instance.destroyApp(true);
instance.notifyDestroyed();
instance = null;
}
}

class TestForm extends Form implements CommandListener {

private Command exit = new Command("退出", Command.EXIT, 0);

public TestForm() {
super("J2ME平台测试");
String s;
//CLDC版本属性
s = System.getProperty("microedition.configuration");
append(getValue("CLDC版本", s));
//MIPD版本属性
s = System.getProperty("microedition.profiles");
append(getValue("MIDP版本",s));

s = System.getProperty("microedition.platform");
append(getValue("软件平台", s));

s = System.getProperty("microedition.encoding");
append(getValue("系统编码", s));

s = System.getProperty("microedition.locale");
append(getValue("区域设置", s));

s = System.getProperty("microedition.jtwi.version");
append(getValue("JTWI", s));

//判断是否支持MMAPI
s = System.getProperty("microedition.media.version");
append(getValue("MMAPI", s));
//判断是否支持WMA
s = System.getProperty("wireless.messaging.sms.smsc");
if(s!=null) {
append(getValue("WMA", "支持"));
append(getValue("SMS", s));
s = System.getProperty("wireless.messaging.mms.mmsc");
append(getValue("MMS", s));
} else
append(getValue("WMA", null));
//判断是否支持蓝牙
s = System.getProperty("bluetooth.api.version");
append(getValue("蓝牙", s));
//判断是否支持个人信息管理
s = System.getProperty("microedition.pim.version");
append(getValue("PIM", s));
//判断是否支持文件系统
s = System.getProperty("microedition.io.file.FileConnection.version");
append(getValue("FileConnection", s));
//判断是否支持SIP
s = System.getProperty("microedition.sip.version");
append(getValue("SIP", s));
//判断是否支持M3G JSR 184
s = System.getProperty("microedition.m3g.version");
append(getValue("M3G", s));
addCommand(exit);
setCommandListener(this);
}

private String getValue(String prompt, String s) {
return prompt + "：" + (s==null ? "不支持" : s) + "\n";
}

public void commandAction(Command c, Displayable d) {
if(c==exit){
DetectMIDlet.quitApp();
}
}

}