supportedtypes.java

来自「本光盘是《J2ME无线移动游戏开发》一书的配套光盘」· Java 代码 · 共 48 行

package ch11;

import javax.microedition.lcdui.*;
import javax.microedition.media.*;

public class SupportedTypes
    extends Form
    implements CommandListener {

  //声明一个退出按钮Command对象
  private Command exitCommand;

  //声明一个Display对象
  private Display display;

  //声明一个VideoPlayer_MIDlet对象
  private VideoPlayer_MIDlet parent;

  /*
   11.构造器
   */
  public SupportedTypes(VideoPlayer_MIDlet parent, String protocol) {
    super(protocol + "协议支持媒体类型");
    this.parent = parent;
    display = Display.getDisplay(parent);

    exitCommand = new Command("返回", Command.EXIT, 2);
    addCommand(exitCommand);
    setCommandListener(this);

    String[] types = Manager.getSupportedContentTypes(protocol);

    for (int i = 0; i < types.length; i++) {
      append(new TextField("http协议", types[i], 20, TextField.ANY));
    }
  }

  /*
   12.响应按钮事件
   */
  public void commandAction(Command c, Displayable s) {
    if (c == exitCommand) {
      display.setCurrent(parent.form);
    }
  }

}