React Native Border Radius with background color

In React Native, borderRadius is working but the background color given to the button stays a square. What is going on here?

JS

<TouchableHighlight
  style={styles.submit}
  onPress={() => this.submitSuggestion(this.props)}
  underlayColor='#fff'>
    <Text style={[this.getFontSize(),styles.submitText]}>Submit</Text>
</TouchableHighlight>

Style

...
submit:{
    marginRight:40,
    marginLeft:40,
    marginTop:10,
},
submitText:{
    paddingTop:20,
    paddingBottom:20,
    color:'#fff',
    textAlign:'center',
    backgroundColor:'#68a0cf',
    borderRadius: 10,
    borderWidth: 1,
    borderColor: '#fff'
},
...

Try moving the button styling to the TouchableHighlight itself:

Styles:

  submit:{
    marginRight:40,
    marginLeft:40,
    marginTop:10,
    paddingTop:20,
    paddingBottom:20,
    backgroundColor:'#68a0cf',
    borderRadius:10,
    borderWidth: 1,
    borderColor: '#fff'
  },
  submitText:{
      color:'#fff',
      textAlign:'center',
  }

Button (same):

<TouchableHighlight
  style={styles.submit}
  onPress={() => this.submitSuggestion(this.props)}
  underlayColor='#fff'>
    <Text style={[this.getFontSize(),styles.submitText]}>Submit</Text>
</TouchableHighlight>

You should add overflow: hidden to your styles:

Js:

<Button style={styles.submit}>Submit</Button>

Styles:

submit {
   backgroundColor: '#68a0cf';
   overflow: 'hidden';
}

Apply the below line of code :

<TextInput
  style={{ height: 40, width: "95%", borderColor: 'gray', borderWidth: 2, borderRadius: 20,  marginBottom: 20, fontSize: 18, backgroundColor: '#68a0cf' }}
  // Adding hint in TextInput using Placeholder option.
  placeholder=" Enter Your First Name"
  // Making the Under line Transparent.
  underlineColorAndroid="transparent"
/>

Apply the below line of code inside the view layout of render block:

<TextInput
  style={{ height: 40, width: "95%", borderColor: 'gray', borderWidth: 2, borderRadius: 20,  marginBottom: 20, fontSize: 18, backgroundColor: '#68a0cf' }}
  // Adding hint in TextInput using Placeholder option.
  placeholder=" Enter Your First Name"
  // Making the Under line Transparent.
  underlineColorAndroid="transparent"
/>