In Harmony OS, a pixel (px) is the smallest unit displayed on the screen, while a fine pixel (fp) is a more refined unit designed to adapt to different screen resolutions, ensuring consistent appearance of UI elements across various devices. Harmony OS introduced the fp unit primarily to better adapt to variable screen densities and resolutions, especially in different application scenarios of IoT devices.
Typically, the ratio between 1px and 1fp may vary depending on the screen density and resolution of the device. In Harmony OS, a conversion method relative to device-independent pixels (dp) is commonly used. According to general conversion standards, 1dp is equivalent to 1px on medium-density screens. However, for fp, as it is defined as a more refined pixel unit, the conversion ratio may be more complex and needs to be determined based on the specific screen characteristics of the device.
For example, on a device with higher screen density, 1fp may represent a finer dimension than 1px, such as 0.5px or smaller, which helps maintain the clarity and precision of graphics and text on high-resolution displays.
In summary, there is no fixed ratio to directly convert 1px to fp, as it requires considering the specific device and screen characteristics. During development, it is best to consult the official Harmony OS documentation or use relevant development tools to obtain precise conversion ratios, ensuring good display performance across different devices.