mediaplayer.java

java手机视频播放器 可以在手机上播放视频

import javax.media.*; 
import java.awt.*; 
import java.awt.event.*; 
class MediaPlayer extends Frame implements ActionListener, 
ControllerListener, ItemListener 
{ 
	Player player; 
	Component vc, cc; 
	boolean first = true, loop = false; 
	String currentDirectory; 
	MediaPlayer (String title) 
	{ 
		super (title); 
		addWindowListener 
		(new WindowAdapter () 
		{ 
			public void windowClosing (WindowEvent e) 

			{ 
//				用户点击窗口系统菜单的关闭按钮 
//				调用dispose以执行windowClosed 
				dispose (); 
			} 

			public void windowClosed (WindowEvent e) 

			{ 
				if (player != null) player.close (); 
				System.exit (0); 
			} 
		}); 
		Menu m = new Menu ("文件"); 
		MenuItem mi = new MenuItem ("打开"); 
		mi.addActionListener (this); 
		m.add (mi); 
		m.addSeparator (); 
		CheckboxMenuItem cbmi = new CheckboxMenuItem ("循环", false); 
		cbmi.addItemListener (this); 
		m.add (cbmi); 
		m.addSeparator (); 
		mi = new MenuItem ("退出"); 
		mi.addActionListener (this); 
		m.add (mi); 
		MenuBar mb = new MenuBar (); 
		mb.add (m); 
		setMenuBar (mb); 
		setSize (200, 200); 
		setVisible (true); 
	} 
	public void actionPerformed (ActionEvent e) 
	{ 
		if (e.getActionCommand ().equals ("退出")) 
		{ 
//			调用dispose以便执行windowClosed 
			dispose (); 
			return; 
		} 
		FileDialog fd = new FileDialog (this, "打开媒体文件", 
				FileDialog.LOAD); 
		fd.setDirectory (currentDirectory); 
		fd.show (); 
//		如果用户放弃选择文件，则返回 
		if (fd.getFile () == null) return; 
		currentDirectory = fd.getDirectory (); 
		if (player != null) 
			player.close (); 
		try 
		{ 
			player = Manager.createPlayer (new MediaLocator ("file:" + fd.getDirectory () + fd.getFile ())); 
		} 
		catch (java.io.IOException e2) 
		{ 
			System.out.println (e2); 
			return; 
		} 
		catch (NoPlayerException e2) 
		{ 
			System.out.println ("不能找到播放器."); 
			return; 
		} 
		if (player == null) 
		{ 
			System.out.println ("无法创建播放器."); 
			return; 
		} 
		first = false; 
		setTitle (fd.getFile ()); 
		player.addControllerListener (this); 
		player.prefetch (); 
	} 
	public void controllerUpdate (ControllerEvent e) 
	{ 
//		调用player.close()时ControllerClosedEvent事件出现。 
//		如果存在视觉部件，则该部件应该拆除（为一致起见， 
//		我们对控制面板部件也执行同样的操作） 
		if (e instanceof ControllerClosedEvent) 
		{ 
			if (vc != null) 
			{ 
				remove (vc); 
				vc = null; 
			} 
			if (cc != null) 
			{ 
				remove (cc); 
				cc = null; 
			} 
			return; 
		} 
		if (e instanceof EndOfMediaEvent) 
		{ 
			if (loop) 
			{ 
				player.setMediaTime (new Time (0)); 
				player.start (); 
			} 
			return; 
		} 
		if (e instanceof PrefetchCompleteEvent) 
		{ 
			player.start (); 
			return; 
		} 
		if (e instanceof RealizeCompleteEvent) 
		{ 
			vc = player.getVisualComponent (); 
			if (vc != null) 
				add (vc); 
			cc = player.getControlPanelComponent (); 
			if (cc != null) 
				add (cc, BorderLayout.SOUTH); 
			pack (); 
		} 
	} 
	public void itemStateChanged (ItemEvent e) 
	{ 
		loop = !loop; 
	} 
	public void paint (Graphics g) 
	{ 
		if (first) 
		{ 
			int w = getSize ().width; 
			int h = getSize ().height; 
			g.setColor (Color.blue); 
			g.fillRect (0, 0, w, h); 
			Font f = new Font ("DialogInput", Font.BOLD, 16); 
			g.setFont (f); 
			FontMetrics fm = g.getFontMetrics (); 
			int swidth = fm.stringWidth ("*** 欢迎 ***"); 
			g.setColor (Color.white); 
			g.drawString ("*** 欢迎 ***", 
					(w - swidth) / 2, 
					(h + getInsets ().top) / 2); 
		} 
//		调用超类Frame的paint()方法，该paint()方法将调用Frame包含的各个容器 
//		和部件（包括控制面板部件）的paint()方法。 
		super.paint (g); 
	} 
//	不执行背景清除操作，以免控制面板部件闪烁 
	public void update (Graphics g) 
	{ 
		paint (g); 
	} 
	public static void main (String [] args) 

	{ 
		new MediaPlayer ("媒体播放器1.0"); 
	} 

}