Код для рисования

dv = new DrawingView(this);
linear1.addView(dv); 
mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND); mPaint.setStrokeCap(Paint.Cap.ROUND); 

timer = new TimerTask() { @Override 
public void run() { runOnUiThread(new Runnable(){ @Override 
public void run()
{ 

float sized = Float.parseFloat(save.getString("size", ""));

colors = save.getString("color", "");

int parsedColor = Color.parseColor (colors);

mPaint.setStrokeWidth(sized);
mPaint.setColor(parsedColor);
}
}); 
}
}; 
_timer.scheduleAtFixedRate(timer, (int)(50), (int)(50)); 
}


DrawingView dv; private Paint mPaint;
private Canvas mCanvas;

public class DrawingView extends View { public int width;
public int height;
private Bitmap mBitmap;
private Path mPath;
private Paint mBitmapPaint;
Context context; private Paint circlePaint; private Path circlePath;

public DrawingView(Context c) { super(c); context=c; mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); circlePaint = new Paint(); circlePath = new Path(); circlePaint.setAntiAlias(true); circlePaint.setColor(Color.BLUE); circlePaint.setStyle(Paint.Style.STROKE); circlePaint.setStrokeJoin(Paint.Join.MITER); circlePaint.setStrokeWidth(4f); }

@Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); }

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawBitmap( mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath( mPath, mPaint); canvas.drawPath( circlePath, circlePaint);
invalidate(); }

private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y) { mPath.reset(); mPath.moveTo(x, y); mX = x; mY = y; }

private void touch_move(float x, float y) { float dx = Math.abs(x - mX); float dy = Math.abs(y - mY); if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) { mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2); mX = x; mY = y; circlePath.reset(); circlePath.addCircle(mX, mY, 30, Path.Direction.CW); } }
private void touch_up() { mPath.lineTo(mX, mY); circlePath.reset();
mCanvas.drawPath(mPath, mPaint);
mPath.reset(); }

@Override public boolean onTouchEvent(MotionEvent event) {
float x = event.getX(); float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: touch_start(x, y); invalidate(); break;
case MotionEvent.ACTION_MOVE: touch_move(x, y); invalidate(); break;
case MotionEvent.ACTION_UP: touch_up(); invalidate(); break; } return true; }