Draw From Old Canvas - Android

Question

I\'m making an App that needs to be able to draw new graphics on top of the last set.

This is my current onDraw() method -

protected void onDraw(Canvas          


        

Answer 1

Found the answer myself :)

@Override
protected void onDraw(Canvas c) {

if(bitmap != null && canvas != null) { 
    canvas.drawLine(p1.x, p1.y, p2.x, p2.y, linePaint);
    c.drawBitmap(bitmap, 0, 0, linePaint);  
}
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

bitmap = Bitmap.createBitmap(width, height, Config.RGB_565);
canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
}

Works exactly as intended, it creates the effect of drawing on top of the old canvas continuously