videoplayer.java

j2me视频播放小程序的源代码

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

/** A simple video player MIDlet using JSR 135 - Mobile Media API */
public class VideoPlayer extends MIDlet implements CommandListener
{
	private Command exitCommand;
	private Command playCommand;
	private Command contentTypeCommand;

	private Display display;
	private TextField textField; 
	public Form form;
	private Gauge gauge;
		
	private static final int GAUGE_LEVELS = 4;
	private static final int GAUGE_MAX = 12;
	private static final String DEFAULT_URL = "http://localhost/test.mpg";
	
	
	public VideoPlayer() {
		display = Display.getDisplay(this);				
		form = new Form("Video Player");
		textField = new TextField("Video URL", DEFAULT_URL, 100, TextField.ANY); 
		gauge = new Gauge("Acquiring video", false, GAUGE_MAX, 0);		
		exitCommand = new Command("Exit", Command.EXIT, 2);	
		playCommand = new Command("Play", Command.SCREEN, 1);
		contentTypeCommand = new Command("Supported media types", Command.SCREEN, 2);
		form.addCommand(playCommand);
		form.addCommand(exitCommand);
		form.addCommand(contentTypeCommand);
		form.setCommandListener(this);
		form.append(textField);		
	}
	
	
	public void startApp(){				
		display.setCurrent(form);				
	}
	

	public void pauseApp(){	
	}
	
	
	public void destroyApp(boolean unconditional){	
	}
	
	
	public void commandAction(Command c, Displayable s){		
		
		if(c == exitCommand){
			destroyApp(false);
			notifyDestroyed();	
		}
						
		else if(c == playCommand){						
			gauge.setValue(0);
			form.append(gauge);			
			
			VideoCanvas videoCanvas = new VideoCanvas(this);
			videoCanvas.initializeVideo(textField.getString());							
		}	
		
		else if (c == contentTypeCommand){
			String url = textField.getString();
			int position = url.indexOf(':');
			String protocol = url.substring(0, position);
		
			SupportedTypes typesUI = new SupportedTypes(this, protocol);	
			display.setCurrent(typesUI);	
		}
			
	}
	
	
	public void updateGauge(){
		int current = gauge.getValue();		
		current = (current + GAUGE_MAX/GAUGE_LEVELS);
        gauge.setValue(current);		
	}

}