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expo 使用 audio
完整文档
Documentation
install
expo install expo-av
import
import {Audio} from "expo-av"
option
expo-audio-arguments-documentation
要么直接默认不配置,要么则所有配置都写上,否则会报错。
constructor(props) {super(props);
this.state = {
// 配置你的歌曲 url,或者动态获取
songUrl: "",
isPlaying: false
};
this.soundObject = null;
const mode = {
playsInSilentModeIOS: true,
allowsRecordingIOS: false,
staysActiveInBackground: true,
interruptionModeIOS: Audio.INTERRUPTION_MODE_IOS_DO_NOT_MIX,
// 前四个配置有一定的固定搭配,详见上面文档链接
interruptionModeAndroid: Audio.INTERRUPTION_MODE_ANDROID_DO_NOT_MIX,
shouldDuckAndroid: true,
playThroughEarpieceAndroid: false
};
Audio.setAudioModeAsync(mode);
}
IOS 后台播放还需要配置下 app.json
{
"expo": {
...
"ios": {
...
"infoPlist": {
...
"UIBackgroundModes": ["audio"]
}
}
}
}
使用
componentDidUpdate(preProps, preState) {
// flac 播放会失败,其他格式未测试
if (preState.songUrl !== this.state.songUrl && !/^.*?\.mp3$/.test(this.state.songUrl)) {this.loadAudio();
}
}
// 加载
async loadAudio() {this.soundObject = new Audio.Sound();
try {
await this.soundObject.loadAsync({uri: this.state.songUrl});
// 自动播放
await this.soundObject.playAsync();
this.setState({isPlaying: true});
} catch (error) {console.warn("ERROR LOADING AUDIO:", error);
}
}
// 播放 / 暂停
toggleAudioPlayStatus = () => {if (!/^.*?\.mp3$/.test(this.state.songUrl)) return;
this.setState(
{isPlaying: !this.state.isPlaying},
() => {this.state.isPlaying ? this.soundObject.playAsync() : this.soundObject.pauseAsync();}
);
};
正文完
发表至: react-native
2019-08-15