Button

A basic button component that should render nicely on any platform. Supports a minimal level of customization.
If this button doesn't look right for your app, you can build your own button using TouchableOpacity or TouchableWithoutFeedback. For inspiration, look at the source code for this button component. Or, take a look at the wide variety of button components built by the community.
<Button
  onPress={onPressLearnMore}
  title="Learn More"
  color="#841584"
  accessibilityLabel="Learn more about this purple button"
/>

import React from 'react';
import { StyleSheet, Button, View, SafeAreaView, Text, Alert } from 'react-native';
import Constants from 'expo-constants';

function Separator() {
  return <View style={styles.separator} />;
}

export default function App() {
  return (
    <SafeAreaView style={styles.container}>
      <View>
        <Text style={styles.title}>
          The title and onPress handler are required. It is recommended to set
          accessibilityLabel to help make your app usable by everyone.
        </Text>
        <Button
          title="Press me"
          onPress={() => Alert.alert('Simple Button pressed')}
        />
      </View>
      <Separator />
      <View>
        <Text style={styles.title}>
          Adjust the color in a way that looks standard on each platform. On
          iOS, the color prop controls the color of the text. On Android, the
          color adjusts the background color of the button.
        </Text>
        <Button
          title="Press me"
          color="#f194ff"
          onPress={() => Alert.alert('Button with adjusted color pressed')}
        />
      </View>
      <Separator />
      <View>
        <Text style={styles.title}>
          All interaction for the component are disabled.
        </Text>
        <Button
          title="Press me"
          disabled
          onPress={() => Alert.alert('Cannot press this one')}
        />
      </View>
      <Separator />
      <View>
        <Text style={styles.title}>
          This layout strategy lets the title define the width of the button.
        </Text>
        <View style={styles.fixToText}>
          <Button
            title="Left button"
            onPress={() => Alert.alert('Left button pressed')}
          />
          <Button
            title="Right button"
            onPress={() => Alert.alert('Right button pressed')}
          />
        </View>
      </View>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    marginTop: Constants.statusBarHeight,
    marginHorizontal: 16,
  },
  title: {
    textAlign: 'center',
    marginVertical: 8,
  },
  fixToText: {
    flexDirection: 'row',
    justifyContent: 'space-between',
  },
  separator: {
    marginVertical: 8,
    borderBottomColor: '#737373',
    borderBottomWidth: StyleSheet.hairlineWidth,
  },
});

Reference

Handler to be called when the user taps the button.
TypeRequired
functionYes

Text to display inside the button.
TypeRequired
stringYes

Text to display for blindness accessibility features.
TypeRequired
stringNo

Color of the text (iOS), or background color of the button (Android).
TypeRequired
colorNo

If true, disable all interactions for this component.
TypeRequired
boolNo

Used to locate this view in end-to-end tests.
TypeRequired
stringNo

(Apple TV only) TV preferred focus (see documentation for the View component).
TypeRequiredPlatform
boolNoiOS

Designates the next view to receive focus when the user navigates down. See the Android documentation.
TypeRequiredPlatform
numberNoAndroid

Designates the next view to receive focus when the user navigates forward. See the Android documentation.
TypeRequiredPlatform
numberNoAndroid

Designates the next view to receive focus when the user navigates left. See the Android documentation.
TypeRequiredPlatform
numberNoAndroid

Designates the next view to receive focus when the user navigates right. See the Android documentation.
TypeRequiredPlatform
numberNoAndroid

Designates the next view to receive focus when the user navigates up. See the Android documentation.
TypeRequiredPlatform
numberNoAndroid

If true, doesn't play system sound on touch.
TypeRequiredPlatform
booleanNoAndroid