React Native and Laravel API

I'm very new to API, and recently I started learning React Native and found some quick tutorial about RN frontend and Laravel backend just App just to show how is API working between. So I done everything step by step but my data from laravel, server is not fetching... Here is my whole code

Starting from Laravel first This is my CoinController:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Coin;

class CoinController extends Controller
{
    public function index()
    {
        $coins = Coin::all();

        return response()->json($coins);
    }
}

Here is my migration for coin table:

class CreateCoinsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('coins', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->integer('price');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('coins');
    }
}

Here is my api.php file:

Route::get('coins', 'CoinController@index');

And here is my env file:

APP_NAME=Laravel
APP_ENV=local
APP_KEY=base64:sqFYSTaGklMTMtSFjRWQjKbIfhPWiGFq1p3JzJOdfOg=
APP_DEBUG=true
APP_URL=http://localhost

LOG_CHANNEL=stack

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=routingproj
DB_USERNAME=root
DB_PASSWORD=

BROADCAST_DRIVER=log
CACHE_DRIVER=file
QUEUE_CONNECTION=sync
SESSION_DRIVER=file
SESSION_LIFETIME=120

REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379

MAIL_DRIVER=smtp
MAIL_HOST=smtp.mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=null

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_DEFAULT_REGION=us-east-1
AWS_BUCKET=

PUSHER_APP_ID=
PUSHER_APP_KEY=
PUSHER_APP_SECRET=
PUSHER_APP_CLUSTER=mt1

MIX_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
MIX_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"

And now React Native app Here is my App.js

// App.js

import React, {Component} from 'react';
import {Platform, StyleSheet, Text, View} from 'react-native';
import {createStackNavigator} from 'react-navigation-stack';
import {createAppContainer} from 'react-navigation';
import Coin from './src/screens/Coin';

const AppNavigator = createStackNavigator({
  CoinScreen: {screen: Coin},
});

export default createAppContainer(AppNavigator);

My Coin.js

// Coin.js

import React, {Component} from 'react';
import {View, Text, StyleSheet} from 'react-native';
import ajax from '../services/FetchCoins';
import CoinList from '../components/CoinList';

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    backgroundColor: '#B6A6BB',
  },
});

export class Coin extends Component {
  state = {
    coins: [],
  };

  async componentDidMount() {
    const coins = await ajax.FetchCoins();
    this.setState({coins});
  }

  render() {
    return (
      <View style={styles.container}>
        {this.state.coins.length > 0 ? (
          <CoinList coins={this.state.coins} />
        ) : (
          <Text>No coins</Text>
        )}
      </View>
    );
  }
}

export default Coin;

Here is my FetchCoin.js

// FetchCoins.js

const URI = 'http://my_ip_address/routingproj/public/api/coins';

export default {
  async fetchCoins() {
    try {
      let response = await fetch(URI + '/api/coins');
      let responseJsonData = await response.json();
      return responseJsonData;
    } catch (e) {
      console.log(e);
    }
  },
};

And my CoinList.js

// CoinList.js

import React, {Component} from 'react';
import {View, Text, StyleSheet} from 'react-native';
import PropTypes from 'prop-types';

export default class CoinList extends Component {
  static propTypes = {
    coins: PropTypes.array.isRequired,
  };
  render() {
    return (
      <View style={styles.coinsList}>
        {this.props.coins.map(coin => {
          return (
            <View key={coin.id}>
              <Text style={styles.cointext}>
                {coin.name} | {coin.price}
              </Text>
            </View>
          );
        })}
      </View>
    );
  }
}

const styles = StyleSheet.create({
  coinsList: {
    flex: 1,
    flexDirection: 'column',
    justifyContent: 'space-around',
  },
  cointext: {
    fontSize: 24,
    fontWeight: 'bold',
    textAlign: 'center',
  },
});

That is all of my code and when i run react-native run-android it shows me No Coins, so that mean my data from server doesn't fetch. Any solutions?