supportform.java

MAPI手机多媒体播放的例子

package com.nokia.example.mmapi.mediasampler.viewer;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.media.Manager;

import com.nokia.example.mmapi.mediasampler.MediaSamplerMIDlet;

/**
 * View that outputs MM API's System properties to a Form.
 */
public class SupportForm extends Form implements CommandListener
{
    private MediaSamplerMIDlet midlet;

    private Displayable medialist;

    private Command backCmd = new Command("Back", Command.STOP, 1);

    public SupportForm(MediaSamplerMIDlet midlet, Displayable medialist)
    {
        super("MM API support check");

        this.midlet = midlet;
        this.medialist = medialist;

        addCommand(backCmd);
        setCommandListener(this);

        init();
    }

    private void init()
    {

        String apiVersion = System.getProperty("microedition.media.version");

        append("MM API version:" + apiVersion + "\n");

        append("Mixing supported: " + System.getProperty("supports.mixing")
                + "\n");

        append("Audio capture supported: "
                + System.getProperty("supports.audio.capture") + "\n");
        append("Video capture supported: "
                + System.getProperty("supports.video.capture") + "\n");

        append("Recording supported: "
                + System.getProperty("supports.recording") + "\n");
        append("Supported audio encodings: "
                + System.getProperty("audio.encodings") + "\n");
        append("Supported video encodings: "
                + System.getProperty("video.encodings") + "\n");
        append("Supported video snaphot encodings: "
                + System.getProperty("video.snapshot.encodings") + "\n");
        append("\n");

        String streamable = System.getProperty("streamable.contents");
        if (streamable == null)
            append("Streaming: not supported.\n");
        else
        {
            append("Streamable contents: " + streamable);

            String[] rtp = Manager.getSupportedContentTypes("rtp");
            if (rtp != null && rtp.length > 0)
            {
                append("RTP protocol supported.");
            }

            String rtsp[] = Manager.getSupportedContentTypes("rtsp");
            if (rtsp != null && rtsp.length > 0)
            {
                append("RTSP protocol supported.");
            }
        }

        String[] contentTypes = Manager.getSupportedContentTypes(null);
        if (contentTypes != null)
        {
            append("\n\nAll supported content types:\n");

            for (int i = 0; i < contentTypes.length; i++)
            {
                append(contentTypes[i] + "\n");
            }
        }
    }

    public void commandAction(Command cmd, Displayable d)
    {
        Display.getDisplay(midlet).setCurrent(medialist);
    }

}