Differences between pixel, dip, and SP units displayed on the Android platform

Layout_width or layout_height in the layout file of Android may sometimes specify a specific unit, such as PX, dip, or sp. Android123 briefly introduces common units, for example

Px (pixels) pixels-generally, we use hvga to represent 320x480 pixels, which is usually used.
Dip or DP (device independent pixels) device independent pixels-this is related to the device hardware. We recommend this to support WVGA, hvga, and qvga cwj, instead of pixels.
SP (scaled pixels-best for text size) to zoom in pixels-mainly deal with the font size.