chore(example): Add functional component version of VoiceTest.tsx (#374)

Co-authored-by: Lee Harrold <lhharrold@sep.com>

example/src/VoiceTestFuncComp.tsx

@@ -0,0 +1,196 @@
+import React, { useEffect, useState } from 'react';
+import {
+  StyleSheet,
+  Text,
+  View,
+  Image,
+  TouchableHighlight,
+} from 'react-native';
+
+import Voice, {
+  SpeechRecognizedEvent,
+  SpeechResultsEvent,
+  SpeechErrorEvent,
+} from '@react-native-voice/voice';
+
+function VoiceTest() {
+  const [recognized, setRecognized] = useState('');
+  const [volume, setVolume] = useState('');
+  const [error, setError] = useState('');
+  const [end, setEnd] = useState('');
+  const [started, setStarted] = useState('');
+  const [results, setResults] = useState([]);
+  const [partialResults, setPartialResults] = useState([]);
+
+  useEffect(() => {
+    Voice.onSpeechStart = onSpeechStart;
+    Voice.onSpeechRecognized = onSpeechRecognized;
+    Voice.onSpeechEnd = onSpeechEnd;
+    Voice.onSpeechError = onSpeechError;
+    Voice.onSpeechResults = onSpeechResults;
+    Voice.onSpeechPartialResults = onSpeechPartialResults;
+    Voice.onSpeechVolumeChanged = onSpeechVolumeChanged;
+
+    return () => {
+      Voice.destroy().then(Voice.removeAllListeners);
+    };
+  }, []);
+
+  const onSpeechStart = (e: any) => {
+    console.log('onSpeechStart: ', e);
+    setStarted('√');
+  };
+
+  const onSpeechRecognized = (e: SpeechRecognizedEvent) => {
+    console.log('onSpeechRecognized: ', e);
+    setRecognized('√');
+  };
+
+  const onSpeechEnd = (e: any) => {
+    console.log('onSpeechEnd: ', e);
+    setEnd('√');
+  };
+
+  const onSpeechError = (e: SpeechErrorEvent) => {
+    console.log('onSpeechError: ', e);
+    setError(JSON.stringify(e.error));
+  };
+
+  const onSpeechResults = (e: SpeechResultsEvent) => {
+    console.log('onSpeechResults: ', e);
+    setResults(e.value);
+  };
+
+  const onSpeechPartialResults = (e: SpeechResultsEvent) => {
+    console.log('onSpeechPartialResults: ', e);
+    setPartialResults(e.value);
+  };
+
+  const onSpeechVolumeChanged = (e: any) => {
+    console.log('onSpeechVolumeChanged: ', e);
+    setVolume(e.value);
+  };
+
+  const _startRecognizing = async () => {
+    _clearState();
+    try {
+      await Voice.start('en-US');
+      console.log('called start');
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const _stopRecognizing = async () => {
+    try {
+      await Voice.stop();
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const _cancelRecognizing = async () => {
+    try {
+      await Voice.cancel();
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const _destroyRecognizer = async () => {
+    try {
+      await Voice.destroy();
+    } catch (e) {
+      console.error(e);
+    }
+    _clearState();
+  };
+
+  const _clearState = () => {
+    setRecognized('');
+    setVolume('');
+    setError('');
+    setEnd('');
+    setStarted('');
+    setResults([]);
+    setPartialResults([]);
+  };
+
+  return (
+    <View style={styles.container}>
+      <Text style={styles.welcome}>Welcome to React Native Voice!</Text>
+      <Text style={styles.instructions}>
+        Press the button and start speaking.
+      </Text>
+      <Text style={styles.stat}>{`Started: ${started}`}</Text>
+      <Text style={styles.stat}>{`Recognized: ${recognized}`}</Text>
+      <Text style={styles.stat}>{`Volume: ${volume}`}</Text>
+      <Text style={styles.stat}>{`Error: ${error}`}</Text>
+      <Text style={styles.stat}>Results</Text>
+      {results.map((result, index) => {
+        return (
+          <Text key={`result-${index}`} style={styles.stat}>
+            {result}
+          </Text>
+        );
+      })}
+      <Text style={styles.stat}>Partial Results</Text>
+      {partialResults.map((result, index) => {
+        return (
+          <Text key={`partial-result-${index}`} style={styles.stat}>
+            {result}
+          </Text>
+        );
+      })}
+      <Text style={styles.stat}>{`End: ${end}`}</Text>
+      <TouchableHighlight onPress={_startRecognizing}>
+        <Image style={styles.button} source={require('./button.png')} />
+      </TouchableHighlight>
+      <TouchableHighlight onPress={_stopRecognizing}>
+        <Text style={styles.action}>Stop Recognizing</Text>
+      </TouchableHighlight>
+      <TouchableHighlight onPress={_cancelRecognizing}>
+        <Text style={styles.action}>Cancel</Text>
+      </TouchableHighlight>
+      <TouchableHighlight onPress={_destroyRecognizer}>
+        <Text style={styles.action}>Destroy</Text>
+      </TouchableHighlight>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  button: {
+    width: 50,
+    height: 50,
+  },
+  container: {
+    flex: 1,
+    justifyContent: 'center',
+    alignItems: 'center',
+    backgroundColor: '#F5FCFF',
+  },
+  welcome: {
+    fontSize: 20,
+    textAlign: 'center',
+    margin: 10,
+  },
+  action: {
+    textAlign: 'center',
+    color: '#0000FF',
+    marginVertical: 5,
+    fontWeight: 'bold',
+  },
+  instructions: {
+    textAlign: 'center',
+    color: '#333333',
+    marginBottom: 5,
+  },
+  stat: {
+    textAlign: 'center',
+    color: '#B0171F',
+    marginBottom: 1,
+  },
+});
+
+export default VoiceTest;