consumelist.java

来自「手机软件开发,输入列表程序,主要功能完成使用手机记录每天消费的流水帐,该程序是整」· Java 代码 · 共 64 行

package consume;

import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.rms.*;
import java.util.Date;

public class ConsumeList extends List implements CommandListener {
  /** Constructor */
  public ConsumeList() {
    super("数据列表",List.IMPLICIT);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  /**Component initialization*/
  private void jbInit() throws Exception {
    // Set up this Displayable to listen to command events
    setCommandListener(this);
    // add the Exit command
    addCommand(new Command("返回", Command.BACK , 1));
    RecordStore rs;
    try {
      rs = RecordStore.openRecordStore("consume", true);
      RecordEnumeration enum = rs.enumerateRecords(null, null, false);
      while (enum.hasNextElement()) {
        try {
          byte[] data = enum.nextRecord();
          DataInputStream is = new DataInputStream(new ByteArrayInputStream(
              data));
          ConsumeData record = new ConsumeData();
          record.date = new Date();
          record.date.setTime(is.readLong());
          record.Num = is.readFloat();
          is.close();
          this.append(String.valueOf(record.Num),null);
      //  this.append(String.valueOf(record.Num)+"  "+String.valueOf(record.date),null);
        }
        catch (InvalidRecordIDException ex) {
          // Ignore deleted record
        }
      }
      enum.destroy();
      rs.closeRecordStore();
    }
    catch (IOException ie) {}
    catch (RecordStoreException e2) {

    }
  }

  /**Handle command events*/
  public void commandAction(Command command, Displayable displayable) {
    /** @todo Add command handling code */
    if (command.getCommandType() == Command.BACK) {
      ConsumeMIDlet.instance.backmain();
    }
  }
}