我正在尝试制作一个简单的 react-native 应用程序，用 expo-audio 录制声音。然后用 expo-async 存储声音。从那里我可以获取文件并再次使用 expo-audio 播放它。
这是录制+存储代码：
const storeData = async (value) => {
let timeStamp = new Date();
const key = timeStamp.toString();
const newKey = key.slice(0, 25);
const stringified = JSON.stringify(value);
try {
console.log("data stored: ", stringified);
await AsyncStorage.setItem(newKey, stringified);
} catch (err) {
console.log(err);
}
};
const recordingInstance = new Audio.Recording();
const startRecording = async () => {
try {
console.log("Requesting permissions..");
await Audio.requestPermissionsAsync();
await Audio.setAudioModeAsync({
allowsRecordingIOS: true,
playsInSilentModeIOS: true,
});
console.log("Starting recording..");
await recordingInstance.prepareToRecordAsync(
Audio.RECORDING_OPTIONS_PRESET_HIGH_QUALITY
);
await recordingInstance.startAsync();
setRecording(recordingInstance);
console.log("Recording started");
} catch (err) {
console.error("Failed to start recording", err);
}
};
const stopRecording = async () => {
try {
console.log("Stopping recording..");
setRecording(undefined);
await recording.stopAndUnloadAsync();
storeData(recording);
console.log("Recording stopped and stored at", "asyncStorage");
} catch (err) {
console.error("stop ", err);
}
};
这是获取文件+播放代码：
const [sound, setSound] = useState();
const playSound = async (key) => {
try {
const stringifiedAudio = await AsyncStorage.getItem(key.data);
const parsedAudio = JSON.parse(stringifiedAudio);
const { sound, status } = await Audio.Sound.createAsync(
{ uri: parsedAudio },
{ shouldPlay: true }
);
setSound(sound);
await sound.playAsync();
} catch (err) {
console.log(err);
}
这是我在尝试播放声音时遇到的错误：
Cannot load an AV asset from a null playback source
at node_modules\expo-av\build\AV.js:115:14 in getNativeSourceAndFullInitialStatusForLoadAsync
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:293:29 in invoke
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:154:27 in invoke
at node_modules\regenerator-runtime\runtime.js:189:16 in PromiseImpl$argument_0
at node_modules\react-native\node_modules\promise\setimmediate\core.js:45:6 in tryCallTwo
at node_modules\react-native\node_modules\promise\setimmediate\core.js:200:22 in doResolve
at node_modules\react-native\node_modules\promise\setimmediate\core.js:66:11 in Promise
at node_modules\regenerator-runtime\runtime.js:188:15 in callInvokeWithMethodAndArg
at node_modules\regenerator-runtime\runtime.js:211:38 in enqueue
at node_modules\regenerator-runtime\runtime.js:238:8 in exports.async
at node_modules\expo-av\build\AV.js:88:7 in getNativeSourceAndFullInitialStatusForLoadAsync
at node_modules\expo-av\build\Audio\Sound.js:89:63 in loadAsync
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:293:29 in invoke
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:154:27 in invoke
at node_modules\regenerator-runtime\runtime.js:189:16 in PromiseImpl$argument_0
at node_modules\react-native\node_modules\promise\setimmediate\core.js:45:6 in tryCallTwo
at node_modules\react-native\node_modules\promise\setimmediate\core.js:200:22 in doResolve
at node_modules\react-native\node_modules\promise\setimmediate\core.js:66:11 in Promise
at node_modules\regenerator-runtime\runtime.js:188:15 in callInvokeWithMethodAndArg
at node_modules\regenerator-runtime\runtime.js:211:38 in enqueue
at node_modules\regenerator-runtime\runtime.js:238:8 in exports.async
at node_modules\expo-av\build\Audio\Sound.js:82:4 in loadAsync
at node_modules\expo-av\build\Audio\Sound.js:152:25 in createAsync
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:293:29 in invoke
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:154:27 in invoke
at node_modules\regenerator-runtime\runtime.js:189:16 in PromiseImpl$argument_0
at node_modules\react-native\node_modules\promise\setimmediate\core.js:45:6 in tryCallTwo
at node_modules\react-native\node_modules\promise\setimmediate\core.js:200:22 in doResolve
at node_modules\react-native\node_modules\promise\setimmediate\core.js:66:11 in Promise
at node_modules\regenerator-runtime\runtime.js:188:15 in callInvokeWithMethodAndArg
at node_modules\regenerator-runtime\runtime.js:211:38 in enqueue
at node_modules\regenerator-runtime\runtime.js:238:8 in exports.async
at node_modules\expo-av\build\Audio\Sound.js:149:20 in createAsync
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:293:29 in invoke
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:154:27 in invoke
at node_modules\regenerator-runtime\runtime.js:164:18 in PromiseImpl.resolve.then$argument_0
at node_modules\react-native\node_modules\promise\setimmediate\core.js:37:13 in tryCallOne
at node_modules\react-native\node_modules\promise\setimmediate\core.js:123:24 in setImmediate$argument_0
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:130:14 in _callTimer
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:181:14 in _callImmediatesPass
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:441:30 in callImmediates
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:387:6 in __callImmediates
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:135:6 in __guard$argument_0
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:364:10 in __guard
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:134:4 in flushedQueue
at [native code]:null in flushedQueue
at [native code]:null in invokeCallbackAndReturnFlushedQueue