**Course Title:** Building Mobile Applications with React Native **Section Title:** Styling and Theming with Styled Components **Topic:** Refactor an application to use Styled Components for consistent styling and theming.(Lab topic) **Objective:** By the end of this lab, you will be able to refactor an existing React Native application to use Styled Components for consistent styling and theming. You will learn how to create reusable styled components, implement themes and global styles, and apply responsive styling techniques. **Prerequisites:** * Basic understanding of React Native and its components * Familiarity with the previous topics in the Styling and Theming with Styled Components section * A React Native project set up with the latest version of React Native CLI or Expo **Step Step 1: Introduction to Styled Components** Styled Components is a popular library for styling React Native components. It allows you to write CSS-like code in JavaScript and apply it to your components. This makes it easier to manage styles and create reusable components. * Learn more about Styled Components: [https://styled-components.com/](https://styled-components.com/) * Install Styled Components in your project: `npm install styled-components` or `yarn add styled-components` **Step 2: Refactoring the Application** To refactor the application, we will start by identifying the components that need to be styled. We will then create a new file for each component and import the necessary styles. * Identify the components that need to be styled: Look for components that have a lot of inline styles or are using a lot of different styles. * Create a new file for each component: Create a new file for each component and import the necessary styles. * Use Styled Components to style the components: Use the `styled` function from Styled Components to create a new styled component. **Step 3: Creating Reusable Styled Components** Reusable styled components are components that can be used throughout the application. We will create a new file for each reusable styled component and import the necessary styles. * Create a new file for each reusable styled component: Create a new file for each reusable styled component and import the necessary styles. * Use the `styled` function from Styled Components to create a new styled component: Use the `styled` function from Styled Components to create a new styled component. * Export the styled component: Export the styled component so it can be used throughout the application. **Step 4: Implementing Themes and Global Styles** Themes and global styles are used to apply a consistent look and feel to the application. We will create a new file for the theme and import the necessary styles. * Create a new file for the theme: Create a new file for the theme and import the necessary styles. * Use the `createGlobalStyle` function from Styled Components to create a new global style: Use the `createGlobalStyle` function from Styled Components to create a new global style. * Export the theme: Export the theme so it can be used throughout the application. **Step 5: Applying Responsive Styling Techniques** Responsive styling techniques are used to make the application look good on different devices. We will use the `media` function from Styled Components to create responsive styles. * Use the `media` function from Styled Components to create responsive styles: Use the `media` function from Styled Components to create responsive styles. * Apply the responsive styles to the components: Apply the responsive styles to the components. **Conclusion:** In this lab, you learned how to refactor an existing React Native application to use Styled Components for consistent styling and theming. You learned how to create reusable styled components, implement themes and global styles, and apply responsive styling techniques. **Exercise:** * Refactor an existing React Native application to use Styled Components for consistent styling and theming. * Create reusable styled components and implement themes and global styles. * Apply responsive styling techniques to make the application look good on different devices. **Leave a comment below if you have any questions or need help with the exercise.** **Next topic:** Importance of testing in mobile development. From: Testing React Native Applications.