Canvas - zooming in, shifting, and scaling on Android

Question

I\'m currently implementing a draw function on a webview image (the elephant below). I don\'t have a problem drawing on it but the zoom function does some funky stuff (2nd i

Answer 1

Can you try to draw paths only one time, and keep the zooming the responsibility of the canvas itself

private boolean pathsDrawn;

protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    clipBounds = canvas.getClipBounds();
    canvas.save();
    drawPaint.setStrokeWidth(8/mScaleFactor);
    canvas.scale(mScaleFactor, mScaleFactor, 0, 0);

    if(!pathsDrawn) {
       canvas.drawPath(drawPath, drawPaint);
       pathsDrawn = true;
    }
    canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
    canvas.restore();
}