1<Text
2    numberOfLines={1}// add this
3    adjustsFontSizeToFit// add this
4    style={{textAlign:'center',fontSize:30}}
5  >

1<View>
2  <Text
3    numberOfLines={1}
4    adjustsFontSizeToFit
5    style={{textAlign:'center',fontSize:30}}
6  >
7    {this.props.email}
8  </Text>
9</View>