playercanvas.java

蓝牙上网 j2me的源代码

package Tonttu;

import java.io.IOException;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.media.Manager;
import javax.microedition.media.Player;
import javax.microedition.media.control.VolumeControl;

public class PlayerCanvas extends Canvas implements CommandListener{
	
	Player player = null;
	private VolumeControl vc = null;
	
	private String musicFile = null;
	int volume = 30;
	
	private Command[] command = new Command[2];
	
	PlayerCanvas() {
		command[0] = new Command("Exit", Command.EXIT, 1);
		command[1] = new Command("File", Command.SCREEN, 2);
		addCommand(command[0]);
		addCommand(command[1]);
		setCommandListener(this);
	}
	
	void getPlayer(String file) {
		try {
			musicFile = file;
			player = Manager.createPlayer(TonttuMIDlet.filerForm.PATH + "/" + musicFile);
			player.realize();
//			player.prefetch();
			repaint();
			vc = (VolumeControl)player.getControl("VolumeControl");
			vc.setLevel(volume);
			player.start();
			repaint();
		} catch(Exception e) {
			closePlayer();
		}
	}
	
	public void paint(Graphics g) {
		int width = getWidth();
		int height = getHeight();
		g.setColor(255, 255, 255);
		g.fillRect(0, 0, width, height);
		g.setColor(0, 0, 0);
		if(player != null) {
			if(player.getState() == Player.PREFETCHED) {
				g.fillTriangle((width/2 - 35), (height/2 - 55) , (width/2 - 35), (height/2 + 25), (width/2 + 35), (height/2 -15));
			} else if(player.getState() == Player.STARTED) {
				g.fillRect((width/2 - 35), (height/2 - 55), 20, 80);
				g.fillRect((width/2 + 15), (height/2 - 55), 20, 80);
			}
			g.setFont(Font.getFont(Font.FACE_MONOSPACE,Font.STYLE_PLAIN,Font.SIZE_SMALL));
			if(musicFile.length() > 26) {
				g.drawString(musicFile.substring(0, 24) + "...", (width - 10), (height - 50), Graphics.RIGHT|Graphics.TOP);
			} else {
				g.drawString(musicFile, (width - 10), (height - 50), Graphics.RIGHT|Graphics.TOP);
			}
			try {
				g.drawImage(Image.createImage("/volume.png"), (width - 40), (height - 29), Graphics.RIGHT|Graphics.TOP);
			} catch(IOException e) {
			}
			g.drawString(Integer.toString(volume/10), (width - 20), (height - 30), Graphics.RIGHT|Graphics.TOP);
			if(volume != 100) {
				g.fillTriangle((width - 14), (height - 29) , (width - 18), (height - 22), (width - 10), (height -22));
			}
			if(volume != 0) {
				g.fillTriangle((width - 14), (height - 13) , (width - 18), (height - 20), (width - 10), (height -20));
			}
		}
	}
	
	void closePlayer() {
		if(player != null) {
			player.close();
			player = null;
		}
		repaint();
	}
	
	public void keyPressed(int keyCode) {
		if(player != null) {
			if(getGameAction(keyCode) == Canvas.FIRE) {
				if(player.getState() == Player.PREFETCHED) {
					try {
						player.start();
						repaint();
					} catch(Exception e) {
						closePlayer();
					}
				} else if(player.getState() == Player.STARTED) {
					try {
						player.stop();
						repaint();
					} catch(Exception e) {
						closePlayer();
					}
				}
			}
			if(getGameAction(keyCode) == Canvas.UP) {
				volume = vc.getLevel();
				volume += 10;
				volume = vc.setLevel(volume);
				repaint();
			}
			if(getGameAction(keyCode) == Canvas.DOWN) {
				volume = vc.getLevel();
				volume -= 10;
				volume = vc.setLevel(volume);
				repaint();
			}
		}
	}
	
	public void commandAction(Command c, Displayable d) {
		if(c == command[0]) {
			closePlayer();
			TonttuMIDlet.tonttuMIDlet.exitApp();
		}
		if(c == command[1]) {
			Display.getDisplay(TonttuMIDlet.tonttuMIDlet).setCurrent(TonttuMIDlet.tonttuMIDlet.filerForm);
		}
	}
}