handleSubmit(){
            fb.firestore().collection("businessDetails").add({
                category: this.state.bCategory,
                description: this.state.bDescription,
                name: this.state.bName,
                since: this.state.bEstablished,
                phone: this.state.bPhone,
                uid: this.state.uid
            })
            .then(()=>{
                console.log("User succesfully submitted, data recorded");
            })
            .catch((error)=>{
                console.log(error);
            })
        }


    <Footer>
        <FooterTab>
            <Button onPress={()=>this.handleSubmit()}
                disabled={!this.state.flag} full
                style={(this.state.flag)?styles.submitButton:[]}
            >
                <Text style={styles.buttonText}>Submit and Signup</Text>
            </Button>
        </FooterTab>
    </Footer>