Login Page Text Inputs w/ React Native

textInputs.jsx

<View>
  <TextInput 
    value={this.state.username} 
    onChangeText={(u) => this.setState({username:u})}
    placeholder={'Kullanıcı Adı'} 
    style={styles.textInput}
    blurOnSubmit={false}
    returnKeyType = {"next"}
    onSubmitEditing={() => { this.secondTextInput.focus(); }}
    />

  <TextInput 
    value={this.state.password} 
    onChangeText={(p) => this.setState({password:p})} 
    secureTextEntry={true} 
    placeholder={'Parola'} 
    style={styles.textInput}
    blurOnSubmit={false}
    ref={(input) => { this.secondTextInput = input; }}
    />
</View>

const styles = StyleSheet.create({
    textInput:{
    height:Dimensions.get('window').height * 0.07,
    width:Dimensions.get('window').width * 0.8,
    backgroundColor:'white',
    borderRadius:20,
    margin:10,
    paddingLeft:10,
    borderColor:'grey',
    borderWidth:1,
  },
});