cigroupchoicemidlet.java~7~

里面的工程文件是本人做的一些小程序

package cigroupchoice;

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

public class ciGroupChoiceMIDlet extends MIDlet implements CommandListener{
  static ciGroupChoiceMIDlet instance;
  ChoiceGroup[] groups;
  Image img1,img2,img3,img4;
  Command cmdFinish;
  Form mainForm,secForm;
  Display display;

  public ciGroupChoiceMIDlet() {
    instance = this;
    mainForm = new Form("单选题");
    secForm = new Form("选择题答案显示界面");
    groups = new ChoiceGroup[20];
    try {
      img1 = Image.createImage("/pic/img1.png");
      img2 = Image.createImage("/pic/img2.png");
      img3 = Image.createImage("/pic/img3.png");
      img4 = Image.createImage("/pic/img4.png");
    }catch (Exception e) {e.printStackTrace();}

    cmdFinish = new Command("finish",Command.SCREEN,0);
    mainForm.addCommand(cmdFinish);
    mainForm.setCommandListener(this);

    for(int i=0;i<20;i++){
      groups[i] = new ChoiceGroup("第" + (i+1) + "题", ChoiceGroup.EXCLUSIVE);
      groups[i].append("A.选项a", img1);
      groups[i].append("B.选项b", img2);
      groups[i].append("C.选项c", img3);
      groups[i].append("D.选项c", img4);
      mainForm.append(groups[i]);
      //display.setCurrent(mainForm);
    }
  }

  public void startApp() {
    Display.getDisplay(this).setCurrent(mainForm);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public void commandAction(Command c,Displayable d){
    if(c==cmdFinish){
      String ans = "";
      for(int p=0;p<mainForm.size();p++){
        for(int q=0;q<groups[q].size();q++){
          if(groups[q].isSelected(q)){
            ans = groups[q].getString(q).substring(0,1);
            secForm.append(ans);
            secForm.append("\n\n");
          }

        }
      }
      display.getDisplay(this).setCurrent(secForm);
    }
  }

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

}