How is text displayed on the system's visual interface?

Displaying text on the visual interface in Android occurs through several stages:

1. Defining the text in layout or code. The text is set in resources (for example, strings.xml) or directly in widgets such as TextView.

2. Measurement and layout. The system measures the size of the text considering font, size, style, and container constraints.

3. Rendering the text. Android uses the Paint class to draw text on the Canvas. The text is broken into characters, fonts and styles are applied, and then characters are drawn pixel by pixel.

4. Display on the screen. The drawn Canvas is displayed on the device's screen.

The core is a text rendering system that takes into account localization, writing direction, kerning, and other parameters for correct display.