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<a href="https://material.io/design/material-theming/overview.html" class="external" target="_blank">Material Theming</a>.
Material Theming refers to the customization of your Material Design app to better reflect your product’s brand.
Material components such as Button and Checkbox use values provided here when retrieving default values.
It defines colors as specified in the Material Color theme creation spec(https://material.io/design/color/the-color-system.html#color-theme-creation), typography defined in the Material Type Scale spec(https://material.io/design/typography/the-type-system.html#type-scale), and shapes defined in the Shape scheme(https://material.io/design/shape/applying-shape-to-ui.html#shape-scheme).
All values may be set by providing this component with the colorsColors, typographyTypography, and shapesShapes attributes. Use this to configure the overall theme of elements within this MaterialTheme.
Any values that are not set will inherit the current value from the theme, falling back to the defaults if there is no parent MaterialTheme. This allows using a MaterialTheme at the top of your application, and then separate MaterialTheme(s) for different screens / parts of your UI, overriding only the parts of the theme definition that need to change.
@Composable fun MaterialTheme( colors: Colors = MaterialTheme.colors, typography: Typography = MaterialTheme.typography, shapes: Shapes = MaterialTheme.shapes, content: @Composable () -> Unit )
|A complete definition of the Material Color theme for this hierarchy|
|A set of text styles to be used as this hierarchy's typography system|
|A set of shapes to be used by the components in this hierarch|