touchableopacity as button in react native

1//React Native Button element doesn't have style props and offers very 
2//few customization. Use TochableXXX elements instead.
3//TouchableOpacity works fine
4
5import {
6  TouchableOpacity,
7  Text,
8} from "react-native";
9
10<TouchableOpacity
11          style={styles.button}
12          onPress={this.onSubmit}
13          disabled={!this.state.isFormValid}
14        >
15          <Text style={styles.btnText}>Add
16			</Text>
17</TouchableOpacity>
18
19const styles = StyleSheet.create({
20
21  button: {
22    width: 200,
23    marginTop: 20,
24    backgroundColor: "green",
25    padding: 15,
26    borderRadius: 50,
27  },
28  btnText: {
29    color: "white",
30    fontSize: 20,
31    justifyContent: "center",
32    textAlign: "center",
33  },
34});