player.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 * @flow
 */

import React, {PureComponent} from 'react';
import {
  AppRegistry, Button, StyleSheet, View
} from 'react-native';
import TrackPlayer from 'react-native-track-player';

export default class App extends PureComponent {
  play() {
    TrackPlayer.play();
  }

  pause() {
    TrackPlayer.pause();
  }

  stop() {
    TrackPlayer.stop();
  }

  render() {
    TrackPlayer.setupPlayer().then(async () => {
      TrackPlayer.updateOptions({
        capabilities: [
          TrackPlayer.CAPABILITY_PLAY,
          TrackPlayer.CAPABILITY_PAUSE,
          TrackPlayer.CAPABILITY_STOP
        ],
      });

      // Adds a track to the queue
      await TrackPlayer.add({
        id: 'trackId',
        url: 'https://dts.podtrac.com/redirect.mp3/download.softskills.audio/sse-136.mp3',
        title: 'Episode 136',
        artist: 'Soft Skills',
      });
    });
    
    return (
      <View style={styles.container}>
        <Button
          onPress={this.play}
          style={styles.playButton}
          title="Play"
        />
        <Button
          onPress={this.pause}
          style={styles.pauseButton}
          title="Pause"
        />
        <Button
          onPress={this.stop}
          style={styles.stopButton}
          title="Stop"
        />
      </View>
    )
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    flexDirection: 'row',
    justifyContent: 'space-evenly',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  playButton: {
    flex: 0.5
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

AppRegistry.registerComponent('App', () => App);
TrackPlayer.registerEventHandler(require('./player-handler.js'));