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package de.spring.mobile;

/**
 * This adapter must be used to support some players by the library.
 * 
 * @see Meta
 * @see SpringStreams
 * @see SpringStreams#track(StreamAdapter, java.util.Map)
 * 
 * @author <a href="mailto:support@spring.de">spring GmbH &amp; Co.KG</a>
 */
public interface StreamAdapter {

	public interface Meta {
		public String getPlayerName();
		public String getPlayerVersion();
		public int getScreenWidth();
		public int getScreenHeight();
	}
	
	public Meta getMeta();
	
	public int getPosition();
	
	public int getDuration();
	
	public int getWidth();
	
	public int getHeight();	
}

The attribute stream is always required and must be specified for each measurement

A stream is measured as long as the Activity is in the foreground. When the Activity goes into the background, the current status is transmitted to the measurement system and the measurement stops. If the stream should be measured again, when the application will come back to the foreground, the method track must be called again.

// start streaming measurement
Stream *stream = sensor.track(adapter, atts);
...
// stop measurement programmatically
stream.stop();

...
sensor.unload();

public class VideoPlayer extends SpringStreamsActivity {

	VideoView videoView;

	/**
	 * 
	 */
	public VideoPlayer() {
		super("test", "Streaming Test App");
	}
	
	
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		videoView = ...; 
	}

	@Override
	protected void onStart() {
		Map<String, Object> atts = new HashMap<String, Object>();
		atts.put("stream", "android/teststream");
		super.track(new VideoViewAdapter(this.videoView), atts);
		super.onStart();
	}
}

/**
 * Implementation of an adapter for the {@link VideoView} in standard 
 * android api.
 * 
 * @author <a href="mailto:support@spring.de">spring GmbH &amp; Co.KG</a>
 */
public class VideoViewAdapter implements StreamAdapter {

		
	private VideoView videoView;
	
	public VideoViewAdapter(VideoView videoView) {
		if(videoView == null) 
			throw new NullPointerException("videoView may not be null");
		this.videoView = videoView;
	}

	@Override
	public Meta getMeta() {
		return new Meta() {
			public String getPlayerName() {
				return "android.widget.VideoView";
			}
			public String getPlayerVersion() {
				return Build.VERSION.RELEASE;
			}
			public int getScreenHeight() {
				return (((WindowManager)videoView.getContext().getSystemService(Context.WINDOW_SERVICE))
                                       .getDefaultDisplay()).getHeight();
			}
			public int getScreenWidth() {
				return (((WindowManager)videoView.getContext().getSystemService(Context.WINDOW_SERVICE))
					.getDefaultDisplay()).getWidth();
			}
		};
	}
	
	@Override
	public int getPosition() {
		return (int)Math.round(videoView.getCurrentPosition()/1000.0);
	}

	@Override
	public int getDuration() {
		return (int)Math.round(videoView.getDuration()/1000.0);
	}

	@Override
	public int getWidth() {
		return videoView.getWidth();
	}

	@Override
	public int getHeight() {
		return videoView.getHeight();
	}
}