test5second.java

J2ME的源码！我以前学习J2ME的源码哈！非常适合初学者

package MidpDemo;

import java.io.IOException;
import java.io.InputStream;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.lcdui.Graphics;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VolumeControl;

public class Test5Second extends Canvas implements CommandListener {
	private Player player;

	private Command cmdok = new Command("播放", Command.OK, 2);

	private Command cmdstop = new Command("暂停", Command.STOP, 1);

	private Command cmdJY = new Command("静音", Command.OK, 3);

	private VolumeControl vc = null;// VolumeControl控制音量

	public Test5Second() {
		InputStream is = getClass().getResourceAsStream("/05A.mid");

		try {
			player = Manager.createPlayer(is, "audio/midi");
			player.realize();
			vc = (VolumeControl) player.getControl("VolumeControl");

		} catch (IOException e) {
			e.printStackTrace();
		} catch (MediaException e) {
			e.printStackTrace();
		}

		addCommand(cmdok);
		addCommand(cmdstop);
		addCommand(cmdJY);

		setCommandListener(this);
	}

	protected void paint(Graphics g) {
		g.fillRect(0, 0, getWidth(), getHeight());
	}

	public void commandAction(Command c, Displayable arg1) {

		if (c == cmdok) {
			try {
				player.start();
			} catch (Exception e) {
				e.printStackTrace();
			}
		} else if (c == cmdstop) {
			try {
				player.stop();
			} catch (MediaException e) {
				e.printStackTrace();
			}
		} else if (c == cmdJY) {
			try {
				vc.setMute(!vc.isMuted());
			} catch (Exception e) {
				e.printStackTrace();
			}

		}

	}

	public void keyPressed(int key) {
		int keycode = this.getGameAction(key);
		switch (keycode) {
		case UP:
			int va = vc.getLevel();
			va += 10;
			vc.setLevel(va);
			break;
		case DOWN:
			int va2 = vc.getLevel();
			va2 -= 10;
			vc.setLevel(va2);
			break;
		default:

		}
	}

}