Draw on SurfaceView(VideoPlayer) Canvas

[sapegas]

I'm trying to draw some primitives on SurfaceView Canvas, but I can't
do this.
I need to implement a VideoPlayer(SurfaceView) with ability to draw on
it(and save user's drawing in future).
Can I do this anyhow? Is it possible on Android?
When I starting the activity, I can hear the voice from the video
player and I can draw on Canvas, but could not combine it together!
There is my code (only drawing on player):

public class CanvasDrawing extends Activity {

private ArrayList<Path> _graphics = new ArrayList<Path>();
private Paint mPaint;
private MediaPlayer mp;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
setContentView(new DrawingPanel(this));
Log.d("mytag", "1");
mPaint = new Paint();
mPaint.setDither(true);
mPaint.setAntiAlias(true);
mPaint.setColor(0xFFFFFF00);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
Log.d("mytag", "2");
}


class DrawingPanel extends SurfaceView implements
SurfaceHolder.Callback {
private DrawingThread _thread;
private Path path;

public DrawingPanel(Context context) {
super(context);
getHolder().addCallback(this);
//
getHolder().setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
getHolder().setFixedSize(100, 100);
//
Log.d("mytag", "3");
_thread = new DrawingThread(getHolder(), this);
Log.d("mytag", "4");
}

public boolean onTouchEvent(MotionEvent event) {
synchronized (_thread.getSurfaceHolder()) {
if(event.getAction() == MotionEvent.ACTION_DOWN){
path = new Path();
path.moveTo(event.getX(), event.getY());
path.lineTo(event.getX(), event.getY());
}else if(event.getAction() == MotionEvent.ACTION_MOVE){
path.lineTo(event.getX(), event.getY());
}else if(event.getAction() == MotionEvent.ACTION_UP){
path.lineTo(event.getX(), event.getY());
_graphics.add(path);
}

return true;
}
}

@Override
public void onDraw(Canvas canvas) {
for (Path path : _graphics) {
//canvas.drawPoint(graphic.x, graphic.y, mPaint);
canvas.drawPath(path, mPaint);
}
}

public void surfaceChanged(SurfaceHolder holder, int format, int
width,
int height) {
// TODO Auto-generated method stub

}

public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
mp = new MediaPlayer();
mp.setDisplay(holder);
try {
mp.setDataSource("/data/test.3gp");
mp.prepare();
mp.start();
Log.d("mytag", "5");
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//
_thread.setRunning(true);
_thread.start();
Log.d("mytag", "6");
}

public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
mp.release();

boolean retry = true;
_thread.setRunning(false);
while (retry) {
try {
_thread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
}

class DrawingThread extends Thread {
private SurfaceHolder _surfaceHolder;
private DrawingPanel _panel;
private boolean _run = false;

public DrawingThread(SurfaceHolder surfaceHolder, DrawingPanel
panel) {
_surfaceHolder = surfaceHolder;
_panel = panel;
}

public void setRunning(boolean run) {
_run = run;
}

public SurfaceHolder getSurfaceHolder() {
return _surfaceHolder;
}

@Override
public void run() {
Canvas c;
while (_run) {
c = null;
try {
c = _surfaceHolder.lockCanvas(null);
synchronized (_surfaceHolder) {
_panel.onDraw(c);
}
} finally {
// do this in a finally so that if an exception is
thrown
// during the above, we don't leave the Surface in
an
// inconsistent state
if (c != null) {
_surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
}



}

Any ideas?
Thank You.

[ko5tik]

Usually this is done via transparent views overlaid over your surface
And remember - you can not overlapp 2 surfaces.

Post by sapegas
I'm trying to draw some primitives on SurfaceView Canvas, but I can't
do this.
I need to implement a VideoPlayer(SurfaceView) with ability to draw on
it(and save user's drawing in future).
Can I do this anyhow? Is it possible on Android?
When I starting the activity, I can hear the voice from the video
player and I can draw on Canvas, but could not combine it together!
public class CanvasDrawing extends  Activity   {
        private ArrayList<Path> _graphics = new ArrayList<Path>();
        private Paint mPaint;
        private MediaPlayer mp;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        setContentView(new DrawingPanel(this));
        Log.d("mytag", "1");
        mPaint = new Paint();
        mPaint.setDither(true);
        mPaint.setAntiAlias(true);
        mPaint.setColor(0xFFFFFF00);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(3);
        Log.d("mytag", "2");
        }
        class DrawingPanel extends SurfaceView implements
SurfaceHolder.Callback {
                private DrawingThread _thread;
                private Path path;
                public DrawingPanel(Context context) {
                        super(context);
            getHolder().addCallback(this);
            //
            getHolder().setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
            getHolder().setFixedSize(100, 100);
            //
            Log.d("mytag", "3");
            _thread = new DrawingThread(getHolder(), this);
            Log.d("mytag", "4");
                }
                public boolean onTouchEvent(MotionEvent event) {
            synchronized (_thread.getSurfaceHolder()) {
                if(event.getAction() == MotionEvent.ACTION_DOWN){
                        path = new Path();
                        path.moveTo(event.getX(), event.getY());
                        path.lineTo(event.getX(), event.getY());
                }else if(event.getAction() == MotionEvent.ACTION_MOVE){
                        path.lineTo(event.getX(), event.getY());
                }else if(event.getAction() == MotionEvent.ACTION_UP){
                        path.lineTo(event.getX(), event.getY());
                        _graphics.add(path);
                }
                return true;
            }
                }
        public void onDraw(Canvas canvas) {
                        for (Path path : _graphics) {
                                //canvas.drawPoint(graphic.x, graphic.y, mPaint);
                                canvas.drawPath(path, mPaint);
                        }
                }
                public void surfaceChanged(SurfaceHolder holder, int format, int
width,
                                                                   int height) {
                        // TODO Auto-generated method stub
                }
                public void surfaceCreated(SurfaceHolder holder) {
                        // TODO Auto-generated method stub
            mp = new MediaPlayer();
            mp.setDisplay(holder);
            try {
                                mp.setDataSource("/data/test.3gp");
                                mp.prepare();
                                mp.start();
                                Log.d("mytag", "5");
                        } catch (IllegalArgumentException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        } catch (IllegalStateException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }
                        //
                        _thread.setRunning(true);
            _thread.start();
            Log.d("mytag", "6");
        }
                public void surfaceDestroyed(SurfaceHolder holder) {
                        // TODO Auto-generated method stub
                        mp.release();
                        boolean retry = true;
            _thread.setRunning(false);
            while (retry) {
                try {
                    _thread.join();
                    retry = false;
                } catch (InterruptedException e) {
                    // we will try it again and again...
                }
            }
                }
        }
        class DrawingThread extends Thread {
        private SurfaceHolder _surfaceHolder;
        private DrawingPanel _panel;
        private boolean _run = false;
        public DrawingThread(SurfaceHolder surfaceHolder, DrawingPanel
panel) {
            _surfaceHolder = surfaceHolder;
            _panel = panel;
        }
        public void setRunning(boolean run) {
            _run = run;
        }
        public SurfaceHolder getSurfaceHolder() {
            return _surfaceHolder;
        }
        public void run() {
            Canvas c;
            while (_run) {
                c = null;
                try {
                    c = _surfaceHolder.lockCanvas(null);
                    synchronized (_surfaceHolder) {
                        _panel.onDraw(c);
                    }
                } finally {
                    // do this in a finally so that if an exception is
thrown
                    // during the above, we don't leave the Surface in
an
                    // inconsistent state
                    if (c != null) {
                        _surfaceHolder.unlockCanvasAndPost(c);
                    }
                }
            }
        }
    }
}
Any ideas?
Thank You.