Setup NativeBase Provider

NativeBaseProvider is a component that makes the theme available throughout your app. It uses React's Context API. Add NativeBaseProvider to the root of your app and update App.js as follows:

App.js

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import React from 'react';
// 1. import `NativeBaseProvider` component
import { NativeBaseProvider, Text, Box } from 'native-base';

export default function App() {
  // 2. Use at the root of your app
  return (
    <NativeBaseProvider>
      <Box flex={1} bg="#fff" alignItems="center" justifyContent="center">
        <Text>Open up App.js to start working on your app!</Text>
      </Box>
    </NativeBaseProvider>
  );
}

Add custom theme (Optional)

If you need to customize the default theme to match your design requirements, you can extend the theme from native-base.

NativeBase 3.0 provides an extendTheme function that deep merges the default theme with your customizations.

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// 1. Import the extendTheme function
import { extendTheme, NativeBaseProvider } from 'native-base';
// 2. Extend the theme to include custom colors, fonts, etc
const newColorTheme = {
  brand: {
    900: '#8287af',
    800: '#7c83db',
    700: '#b3bef6',
  },
};
const theme = extendTheme({ colors: newColorTheme });
// 3. Pass the `theme` prop to the `NativeBaseProvider`
function App() {
  return (
    <NativeBaseProvider theme={theme}>
      <App />
    </NativeBaseProvider>
  );
}

Add colorModeManager (Optional)

If you want to do something with the color modes in your app, you can use colorModeManager Prop of NativeBaseProvider to achieve it.

In the example below, we show how to store the active ColorMode in an async storage, so it can be consistent all around your app.

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import React from 'react';
import { NativeBaseProvider, ColorMode } from 'native-base';
import type { StorageManager } from 'native-base';
import AsyncStorage from '@react-native-async-storage/async-storage';

export default ({ children, theme }: any) => {
  const colorModeManager: StorageManager = {
    get: async () => {
      try {
        let val = await AsyncStorage.getItem('@my-app-color-mode');
        return val === 'dark' ? 'dark' : 'light';
      } catch (e) {
        console.log(e);
        return 'light';
      }
    },
    set: async (value: ColorMode) => {
      try {
        await AsyncStorage.setItem('@my-app-color-mode', value);
      } catch (e) {
        console.log(e);
      }
    },
  };
  return (
    <NativeBaseProvider theme={theme} colorModeManager={colorModeManager}>
      {/* Your App Goes Here */}
    </NativeBaseProvider>
  );
};

Add external dependencies (Optional)

If you want to use the

Gradient feature in Box

,it has to pass linear gradient dependency as a config object in NativeBaseProvider. This dependency can be either from

expo-linear-gradient

react-native-linear-gradient

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import React from 'react';
import { NativeBaseProvider } from 'native-base';

const config = {
  dependencies: {
    // For Expo projects (Bare or managed workflow)
    'linear-gradient': require('expo-linear-gradient').LinearGradient,
    // For non expo projects
    // 'linear-gradient': require('react-native-linear-gradient').default,
  },
};

export default () => {
  return (
    <NativeBaseProvider config={config}>
      <Center flex={1}>
        <Example />
      </Center>
    </NativeBaseProvider>
  );
};