Android programmatically distinguish between ldpi, mdpi, etc

I have multiple assets 开发者_如何学Pythonand multiple layouts, but there are some parts of this app where I set width and height dip values within the java code. How do I distinguish between screen sizes here?

context.getResources().getDisplayMetrics().density * sizeInDips will give you the size in pixels on the current device.

Edit: If you want conditional values based on the configuration, you can do things like:

res/values/dimens.xml:

<resources>
    <dimen name="foo">8dip</dimen>
</resources>

res/values-xlarge/dimens.xml:

<resources>
    <dimen name="foo">16dip</dimen>
</resources>

These values can change based on any of the available resource configuration specifiers.

This will help:

• xlarge screens are at least 960dp x 720dp
• large screens are at least 640dp x 480dp
• normal screens are at least 470dp x 320dp
• small screens are at least 426dp x 320dp

AND

From http://developer.android.com/guide/practices/screens_support.html