mmatoneplayer.java

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import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import java.io.*;

public class MMATonePlayer
    extends TonePlayer
	implements PlayerListener
{
    private Player player;
    private boolean playing = false;
	private ToneControl tc;

	static final byte C4 = ToneControl.C4;
	static final byte tones[][] =
    {
        {C4,    C4+1 },         // C, C#
        {C4+2,  C4+3 },         // D, D#
        {C4+4,  C4+4 },         // E, E (无 E#)
        {C4+5,  C4+6 },         // F, F#
        {C4+7,  C4+8 },         // G, G#
        {C4+9,  C4+10},         // A, A#
        {C4+11, C4+11},         // B, B (无 B#)
        {C4+12, C4+13},         // C, C#
        {C4+14, C4+15},         // D, D#
        {C4+16, C4+16},         // E, E (无 E#)
        {C4+17, C4+18}          // F, F#
    };

	public MMATonePlayer() throws Exception
	{
		try{
		}catch(Exception e ){ throw e;}

	}

	// 播放
    void play(int toneIndex, boolean sharp)
    {
		byte tone = tones[ toneIndex ][ sharp?0:1];
		//playToneSimple( tone );
		playToneControl( tone );
		System.out.println( tone );
    }

	// 停止
    void stop()
    {
		try{
			if( playing && player != null) {
				player.stop();
				player = null;
			}
		}catch( Exception e ){}
		playing = false;
    }

	// 能否有#音
	boolean maySharp( int toneIndex )
	{
		if( toneIndex==2 || toneIndex==6 ||
			toneIndex==9 )
			return false;
		return true;
	}

	// 简单的播放方法
    private void playToneSimple( byte tone)
    {
        try
        {
            Manager.playTone(tone, 1000, 80);
        }
        catch (MediaException me)
        {
            me.printStackTrace();
        }
    }

	// 复杂的播放方法
    private void playToneControl( byte tone)
    {
        byte[] sequence =
        {
            ToneControl.VERSION, 1,
            ToneControl.TEMPO, 15,    
			ToneControl. RESOLUTION, 64,     
			tone, 32,
        };
        try
        {
			if( playing && player != null )
				player.stop();
            
		    player = Manager.createPlayer(
				Manager.TONE_DEVICE_LOCATOR);
            player.addPlayerListener(this);
            player.realize();
			tc = (ToneControl)(
				player.getControl("ToneControl"));
            tc.setSequence(sequence);
            player.start();
            playing = true;
        }
        catch (Exception e)
        {
			e.printStackTrace();
        }
    }

	// 事件处理
    public void playerUpdate(Player p,
                             String event,
                             Object eventData)
    {
        if (event == END_OF_MEDIA)
        {
            p.close();
			playing = false;
        }
		if (event == CLOSED )
		{
			playing = false;
		}
    }
}