scaling

I am developing a simple informative system which will use a lot of images. The problem is I do not know how to scale them to the folder of ldpi, mdpi, hdpi, and hdpi. I read that android uses a scaling ratio like 3:4:6:8. Can some explain to me what is this 3:4:6:8 scaling ratio ? How do I use it, and what is the logic behind it? Suppose I have a 50x50 px image in ldpi folder. If I am going to use 3:4:6:8 ratio . What will be the next image size for my mdpi folder and hdpi folder? Please help. I dont realy understand that scaling ratio. Sorry for this, I'm only a newbie in android design.

For my question I have prepared a very simple test app at Github. For simplicity I have removed flinging, scroll constraints and edge effects (which actually work well in my real app): So the custom view in my test app only supports scrolling: mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() { @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float dX, float dY) { mBoardScrollX -= dX; mBoardScrollY -= dY; ViewCompat.postInvalidateOnAnimation(MyView.this); return true; } }); and pinch zooming with 2 fingers (the focus is broken though

I have tried to auto resize the image using the CSS property max-width , but it does't work in IE7 and IE8. Is there any way to auto resize the image with pure CSS in IE7 and IE8? Use width: inherit; to make it work with pure CSS in IE8. (See responsive-base.css .) Like this: img { width: inherit; /* This makes the next two lines work in IE8. */ max-width: 100%; /* Add !important if needed. */ height: auto; /* Add !important if needed. */ } I'm not sure if that works in IE7—please test it and let us know if you're testing IE7. Before I figured out the width: inherit technique I was using the

I'm attempting to scale an image, modify it, and then output to another image format. So far, I've been using the apache batik library. For simple conversion, this is easy. For clipping the svg, this is easy. However, I can't seem to figure out how to scale to the full image created by the svg. That is, I can specify the area of interest as a bounding rectangle, and then scaling works over the bounding rectangle, but I do NOT know how to scale over the image of the svg. This is what I have so far: ... //set the output width and height transcoder.addTranscodingHint( PNGTranscoder.KEY_WIDTH, new

Vert.x is a tool-kit for building reactive applications on the JVM. I want to use vertx for JVM-based auto-scalable RESTful backend API. So far what I've found from the documentation, that it takes by default the number of cores in your machine, let's say you have N cores and creates N threads for each core, each thread is a event bus, each thread contains vertx instances. The question is, how does Vertx control the number of instances? based on load-pressure? This thing about control over the number of Verticles running withing a given thread i still don't get. Please help to clearify this