mmapimidlet.java

j2me多媒体

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import javax.microedition.lcdui.*;
import java.io.*;

public class MMAPIMIDlet extends MIDlet implements CommandListener,PlayerListener{
	private static final Command CMD_EXIT=new Command("退出",Command.EXIT,2);
	private static final Command CMD_MONOPLAY=new Command("单音播放",Command.OK,1);
	private static final Command CMD_SIMPLEPLAY=new Command("简单重放控制",Command.OK,1);
	private static final Command CMD_DETAILPLAY=new Command("详细重放控制",Command.OK,1);
	private static final Command CMD_MIDIPLAY=new Command("MIDI重放控制",Command.OK,1);
	private static final Command CMD_VIDEOPLAY=new Command("视频播放",Command.OK,1);
	private static final Command CMD_MONOSEQUENCE=new Command("单音序列",Command.OK,1);
	
	private Display display;
	private Form mainForm;
	private static final long SECOND_TO_MICROSECOND=1000000L;
	
	public MMAPIMIDlet() {
		// TODO Auto-generated constructor stub
		display=Display.getDisplay(this);
		mainForm=new Form("多媒体编程");
		mainForm.addCommand(CMD_EXIT);
		mainForm.addCommand(CMD_MONOPLAY);
		mainForm.addCommand(CMD_SIMPLEPLAY);
		mainForm.addCommand(CMD_DETAILPLAY);
		mainForm.addCommand(CMD_MIDIPLAY);
		mainForm.addCommand(CMD_VIDEOPLAY);
		mainForm.addCommand(CMD_MONOSEQUENCE);
		mainForm.setCommandListener(this);
		display.setCurrent(mainForm);
		/*String[] strFormat=Manager.getSupportedContentTypes(null);
		for(int index=0;index<strFormat.length;index++)
		{
			System.out.println(strFormat[index]);
		}*/
		String[] strProtocol=Manager.getSupportedProtocols(null);
		for(int index=0;index<strProtocol.length;index++)
		{
			System.out.println(strProtocol[index]);
			String[]strFormat=Manager.getSupportedContentTypes(strProtocol[index]);
			for(int script=0;script<strFormat.length;script++)
			{
				System.out.println(strFormat[script]);
			}
		}
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}

	protected void startApp() throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}
	public void commandAction(Command c,Displayable d)
	{
		if(c==CMD_EXIT)
		{
			notifyDestroyed();
		}
		else if(c==CMD_MONOPLAY)
		{
			try
			{
				Manager.playTone(ToneControl.C4,5000,100);
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
		else if(c==CMD_SIMPLEPLAY)
		{
			try
			{
				InputStream is=this.getClass().getResourceAsStream("/pattern.mid");
				Player player=Manager.createPlayer(is,"audio/midi");
				System.out.println("简单重放控制播放器创建成功");
				player.realize();
				player.prefetch();
				player.setLoopCount(5);
				player.start();
			}
			catch(IOException ioe)
			{
				System.out.println(ioe.toString());
				ioe.printStackTrace();
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
		else if(c==CMD_DETAILPLAY)
		{
			Player player;
			VolumeControl volumeControl;
			try
			{
				InputStream is=this.getClass().getResourceAsStream("/ALLMYLOV.MID");
				player=Manager.createPlayer(is,"audio/midi");
				System.out.println("详细重放控制播放器创建成功");
				player.realize();
				player.addPlayerListener(this);
				volumeControl=(VolumeControl)player.getControl("VolumeControl");
				if(volumeControl!=null)
				{
					volumeControl.setLevel(100);
				}
				player.setMediaTime(5*SECOND_TO_MICROSECOND);
				player.prefetch();
				player.start();
			}
			catch(IOException ioe)
			{
				System.out.println(ioe.toString());
				ioe.printStackTrace();
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
		else if(c==CMD_MIDIPLAY)
		{
			Player player;
			TempoControl tempoControl;
			try
			{
				InputStream is=this.getClass().getResourceAsStream("/pattern.mid");
				//player=Manager.createPlayer("/pattern.mid");
				player=Manager.createPlayer(is,"audio/midi");
				System.out.println("MIDI重放控制播放器成功创建播放器");
				player.realize();
				tempoControl=(TempoControl)player.getControl("TempoControl");
				tempoControl.setTempo(120000);
				player.start();
			}
			catch(IOException ioe)
			{
				System.out.println(ioe.toString());
				ioe.printStackTrace();
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
		else if(c==CMD_VIDEOPLAY)
		{
			Player player;
			VideoControl videoControl;
			try
			{
				InputStream is=this.getClass().getResourceAsStream("/movie.mpg");
				//player=Manager.createPlayer("/Firebathero.3gp");
				player=Manager.createPlayer(is,"video/mpeg");
				System.out.println("视频播放器创建成功");
				player.realize();
				videoControl=(VideoControl)player.getControl("VideoControl");
				if(videoControl!=null)
				{
					//Form form=new Form("视频播放器");
					//form.append((Item)videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE,null));
					mainForm.append((Item)videoControl.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE,null));
					display.setCurrent(mainForm);
				}
				player.start();
			}
			catch(IOException ioe)
			{
				System.out.println(ioe.toString());
				ioe.printStackTrace();
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
		else if(c==CMD_MONOSEQUENCE)
		{
			byte tempo = 30; // set tempo to 120 bpm 
			byte depth = 8;      // eighth-note 

			byte C4 = ToneControl.C4;; 
			byte D4 = (byte)(C4 + 2); // a whole step 
			byte E4 = (byte)(C4 + 4); // a major third 
			byte G4 = (byte)(C4 + 7); // a fifth 
			byte rest = ToneControl.SILENCE; // rest 

			byte[] mySequence = {
			    ToneControl.VERSION, 1,   // version 1
			    ToneControl.TEMPO, tempo, // set tempo
			    ToneControl.BLOCK_START, 0,   // start define "A" section
			    E4,depth, D4,depth, C4,depth, E4,depth,       // content of "A" section
			    E4,depth, E4,depth, E4,depth, rest,depth,           
			    ToneControl.BLOCK_END, 0,     // end define "A" section
			    ToneControl.PLAY_BLOCK, 0,    // play "A" section
			    D4,depth, D4,depth, D4,depth, rest,depth,     // play "B" section
			    E4,depth, G4,depth, G4,depth, rest,depth,
			    ToneControl.PLAY_BLOCK, 0,    // repeat "A" section
			    D4,depth, D4,depth, E4,depth, D4,depth, C4,depth  // play "C" section
			}; 

			try{ 
			    Player p = Manager.createPlayer(Manager.TONE_DEVICE_LOCATOR); 
			    p.realize(); 
			    ToneControl control = (ToneControl)p.getControl("ToneControl"); 
			    control.setSequence(mySequence); 
			    p.start(); 
			} catch (IOException ioe) { 
			} catch (MediaException me) { } 
		}
	}
	
	public void playerUpdate(Player player,String event,Object eventData)
	{
		if(event=="EVENT_OF_MEDIA" || event=="STOP_AT_TIME")
		{
			System.out.println("处理完毕");
			try
			{
				player.setMediaTime(5*SECOND_TO_MICROSECOND);
				player.start();
			}
			catch(MediaException me)
			{
				System.out.println(me.toString());
				me.printStackTrace();
			}
		}
	}
}